8.2/CODING_STYLE.html



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<li class="toctree-l1"><a class="reference internal" href="intro/index.html">Introduction</a><ul>
<li class="toctree-l2"><a class="reference internal" href="intro/index.html#key-features">Key features</a></li>
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<li class="toctree-l2"><a class="reference internal" href="intro/index.html#faq">FAQ</a><ul>
<li class="toctree-l3"><a class="reference internal" href="intro/index.html#where-can-i-ask-questions">Where can I ask questions?</a></li>
<li class="toctree-l3"><a class="reference internal" href="intro/index.html#is-my-mcu-hardware-supported">Is my MCU/hardware supported?</a></li>
<li class="toctree-l3"><a class="reference internal" href="intro/index.html#is-my-display-supported">Is my display supported?</a></li>
<li class="toctree-l3"><a class="reference internal" href="intro/index.html#lvgl-doesn-t-start-randomly-crashes-or-nothing-is-drawn-on-the-display-what-can-be-the-problem">LVGL doesn't start, randomly crashes or nothing is drawn on the display. What can be the problem?</a></li>
<li class="toctree-l3"><a class="reference internal" href="intro/index.html#my-display-driver-is-not-called-what-have-i-missed">My display driver is not called. What have I missed?</a></li>
<li class="toctree-l3"><a class="reference internal" href="intro/index.html#why-is-the-display-driver-called-only-once-only-the-upper-part-of-the-display-is-refreshed">Why is the display driver called only once? Only the upper part of the display is refreshed.</a></li>
<li class="toctree-l3"><a class="reference internal" href="intro/index.html#why-do-i-see-only-garbage-on-the-screen">Why do I see only garbage on the screen?</a></li>
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<li class="toctree-l1"><a class="reference internal" href="examples.html">Examples</a><ul>
<li class="toctree-l2"><a class="reference internal" href="examples.html#get-started">Get started</a><ul>
<li class="toctree-l3"><a class="reference internal" href="examples.html#a-button-with-a-label-and-react-on-click-event">A button with a label and react on click event</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#create-styles-from-scratch-for-buttons">Create styles from scratch for buttons</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#create-a-slider-and-write-its-value-on-a-label">Create a slider and write its value on a label</a></li>
</ul>
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<li class="toctree-l2"><a class="reference internal" href="examples.html#styles">Styles</a><ul>
<li class="toctree-l3"><a class="reference internal" href="examples.html#size-styles">Size styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#background-styles">Background styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#border-styles">Border styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#outline-styles">Outline styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#shadow-styles">Shadow styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#image-styles">Image styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#text-styles">Text styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#line-styles">Line styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#transition">Transition</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#using-multiple-styles">Using multiple styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#local-styles">Local styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#add-styles-to-parts-and-states">Add styles to parts and states</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#extending-the-current-theme">Extending the current theme</a></li>
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<li class="toctree-l2"><a class="reference internal" href="examples.html#animations">Animations</a><ul>
<li class="toctree-l3"><a class="reference internal" href="examples.html#start-animation-on-an-event">Start animation on an event</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#playback-animation">Playback animation</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#animation-timeline">Animation timeline</a></li>
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<li class="toctree-l2"><a class="reference internal" href="examples.html#events">Events</a><ul>
<li class="toctree-l3"><a class="reference internal" href="examples.html#button-click-event">Button click event</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#handle-multiple-events">Handle multiple events</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#event-bubbling">Event bubbling</a></li>
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<li class="toctree-l2"><a class="reference internal" href="examples.html#layouts">Layouts</a><ul>
<li class="toctree-l3"><a class="reference internal" href="examples.html#flex">Flex</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#a-simple-row-and-a-column-layout-with-flexbox">A simple row and a column layout with flexbox</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#arrange-items-in-rows-with-wrap-and-even-spacing">Arrange items in rows with wrap and even spacing</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#demonstrate-flex-grow">Demonstrate flex grow</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#id1">Demonstrate flex grow.</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#demonstrate-column-and-row-gap-style-properties">Demonstrate column and row gap style properties</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#rtl-base-direction-changes-order-of-the-items">RTL base direction changes order of the items</a></li>
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<li class="toctree-l3"><a class="reference internal" href="examples.html#grid">Grid</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#a-simple-grid">A simple grid</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#demonstrate-cell-placement-and-span">Demonstrate cell placement and span</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#demonstrate-grid-s-free-unit">Demonstrate grid's &quot;free unit&quot;</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#demonstrate-track-placement">Demonstrate track placement</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#demonstrate-column-and-row-gap">Demonstrate column and row gap</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#demonstrate-rtl-direction-on-grid">Demonstrate RTL direction on grid</a></li>
</ul>
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</ul>
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<li class="toctree-l2"><a class="reference internal" href="examples.html#scrolling">Scrolling</a><ul>
<li class="toctree-l3"><a class="reference internal" href="examples.html#nested-scrolling">Nested scrolling</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#snapping">Snapping</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#floating-button">Floating button</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#styling-the-scrollbars">Styling the scrollbars</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#right-to-left-scrolling">Right to left scrolling</a></li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#translate-on-scroll">Translate on scroll</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="examples.html#widgets">Widgets</a><ul>
<li class="toctree-l3"><a class="reference internal" href="examples.html#base-object">Base object</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#base-objects-with-custom-styles">Base objects with custom styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#make-an-object-draggable">Make an object draggable</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#arc">Arc</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-arc">Simple Arc</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#loader-with-arc">Loader with Arc</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#bar">Bar</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-bar">Simple Bar</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#styling-a-bar">Styling a bar</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#temperature-meter">Temperature meter</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#stripe-pattern-and-range-value">Stripe pattern and range value</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#bar-with-ltr-and-rtl-base-direction">Bar with LTR and RTL base direction</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#custom-drawer-to-show-the-current-value">Custom drawer to show the current value</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#button">Button</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-buttons">Simple Buttons</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#styling-buttons">Styling buttons</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#gummy-button">Gummy button</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#button-matrix">Button matrix</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-button-matrix">Simple Button matrix</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#custom-buttons">Custom buttons</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#pagination">Pagination</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#calendar">Calendar</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#calendar-with-header">Calendar with header</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#canvas">Canvas</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#drawing-on-the-canvas-and-rotate">Drawing on the Canvas and rotate</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#transparent-canvas-with-chroma-keying">Transparent Canvas with chroma keying</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#chart">Chart</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#line-chart">Line Chart</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#faded-area-line-chart-with-custom-division-lines">Faded area line chart with custom division lines</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#axis-ticks-and-labels-with-scrolling">Axis ticks and labels with scrolling</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#show-the-value-of-the-pressed-points">Show the value of the pressed points</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#display-1000-data-points-with-zooming-and-scrolling">Display 1000 data points with zooming and scrolling</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#show-cursor-on-the-clicked-point">Show cursor on the clicked point</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#scatter-chart">Scatter chart</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#stacked-area-chart">Stacked area chart</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#checkbox">Checkbox</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-checkboxes">Simple Checkboxes</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#checkboxes-as-radio-buttons">Checkboxes as radio buttons</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#colorwheel">Colorwheel</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-colorwheel">Simple Colorwheel</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#dropdown">Dropdown</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-drop-down-list">Simple Drop down list</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#drop-down-in-four-directions">Drop down in four directions</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#menu">Menu</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#image">Image</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#image-from-variable-and-symbol">Image from variable and symbol</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#image-recoloring">Image recoloring</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#rotate-and-zoom">Rotate and zoom</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#image-offset-and-styling">Image offset and styling</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#image-button">Image button</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-image-button">Simple Image button</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#keyboard">Keyboard</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#keyboard-with-text-area">Keyboard with text area</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#label">Label</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#line-wrap-recoloring-and-scrolling">Line wrap, recoloring and scrolling</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#text-shadow">Text shadow</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#show-ltr-rtl-and-chinese-texts">Show LTR, RTL and Chinese texts</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#draw-label-with-gradient-color">Draw label with gradient color</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#led">LED</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#led-with-custom-style">LED with custom style</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#line">Line</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-line">Simple Line</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#list">List</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-list">Simple List</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#sorting-a-list-using-up-and-down-buttons">Sorting a List using up and down buttons</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#id2">Menu</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-menu">Simple Menu</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-menu-with-root-btn">Simple Menu with root btn</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-menu-with-custom-header">Simple Menu with custom header</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-menu-with-floating-btn-to-add-new-menu-page">Simple Menu with floating btn to add new menu page</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#complex-menu">Complex Menu</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#meter">Meter</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-meter">Simple meter</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#a-meter-with-multiple-arcs">A meter with multiple arcs</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#a-clock-from-a-meter">A clock from a meter</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#pie-chart">Pie chart</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#message-box">Message box</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-message-box">Simple Message box</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#roller">Roller</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-roller">Simple Roller</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#styling-the-roller">Styling the roller</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#add-fade-mask-to-roller">add fade mask to roller</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#slider">Slider</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-slider">Simple Slider</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#slider-with-custom-style">Slider with custom style</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#slider-with-extended-drawer">Slider with extended drawer</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#span">Span</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#span-with-custom-styles">Span with custom styles</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#spinbox">Spinbox</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-spinbox">Simple Spinbox</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#spinner">Spinner</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-spinner">Simple spinner</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#switch">Switch</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-switch">Simple Switch</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#table">Table</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-table">Simple table</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#lightweighted-list-from-table">Lightweighted list from table</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#tabview">Tabview</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-tabview">Simple Tabview</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#tabs-on-the-left-styling-and-no-scrolling">Tabs on the left, styling and no scrolling</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#textarea">Textarea</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-text-area">Simple Text area</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#text-area-with-password-field">Text area with password field</a></li>
<li class="toctree-l4"><a class="reference internal" href="examples.html#text-auto-formatting">Text auto-formatting</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#id3">Tabview</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#tileview-with-content">Tileview with content</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="examples.html#window">Window</a><ul>
<li class="toctree-l4"><a class="reference internal" href="examples.html#simple-window">Simple window</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="get-started/index.html">Get started</a><ul>
<li class="toctree-l2"><a class="reference internal" href="get-started/quick-overview.html">Quick overview</a><ul>
<li class="toctree-l3"><a class="reference internal" href="get-started/quick-overview.html#get-started-in-a-simulator">Get started in a simulator</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/quick-overview.html#add-lvgl-into-your-project">Add LVGL into your project</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/quick-overview.html#learn-the-basics">Learn the basics</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/quick-overview.html#widgets">Widgets</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/quick-overview.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/quick-overview.html#parts">Parts</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/quick-overview.html#states">States</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/quick-overview.html#styles">Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/quick-overview.html#themes">Themes</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/quick-overview.html#examples">Examples</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/quick-overview.html#a-button-with-a-label-and-react-on-click-event">A button with a label and react on click event</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/quick-overview.html#create-styles-from-scratch-for-buttons">Create styles from scratch for buttons</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/quick-overview.html#create-a-slider-and-write-its-value-on-a-label">Create a slider and write its value on a label</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/quick-overview.html#micropython">Micropython</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="get-started/pc-simulator.html">Simulator on PC</a><ul>
<li class="toctree-l3"><a class="reference internal" href="get-started/pc-simulator.html#select-an-ide">Select an IDE</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/pc-simulator.html#set-up-eclipse-cdt">Set-up Eclipse CDT</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/pc-simulator.html#install-eclipse-cdt">Install Eclipse CDT</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/pc-simulator.html#install-sdl-2">Install SDL 2</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/pc-simulator.html#pre-configured-project">Pre-configured project</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/pc-simulator.html#add-the-pre-configured-project-to-eclipse-cdt">Add the pre-configured project to Eclipse CDT</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/pc-simulator.html#compile-and-run">Compile and Run</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="get-started/stm32.html">STM32</a></li>
<li class="toctree-l2"><a class="reference internal" href="get-started/nxp.html">NXP</a><ul>
<li class="toctree-l3"><a class="reference internal" href="get-started/nxp.html#creating-new-project-with-lvgl">Creating new project with LVGL</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/nxp.html#adding-hw-acceleration-for-nxp-imx-rt-platforms-using-pxp-pixel-pipeline-engine-for-existing-projects">Adding HW acceleration for NXP iMX RT platforms using PXP (PiXel Pipeline) engine for existing projects</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/nxp.html#features-supported">Features supported:</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/nxp.html#basic-configuration">Basic configuration:</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/nxp.html#basic-initialization">Basic initialization:</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/nxp.html#project-setup">Project setup:</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/nxp.html#advanced-configuration">Advanced configuration:</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="get-started/espressif.html">Espressif (ESP32 chip series)</a><ul>
<li class="toctree-l3"><a class="reference internal" href="get-started/espressif.html#lvgl-demo-project-for-esp32">LVGL demo project for ESP32</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/espressif.html#using-lvgl-in-your-esp-idf-project">Using LVGL in your ESP-IDF project</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/espressif.html#prerequisites">Prerequisites</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/espressif.html#obtaining-lvgl">Obtaining LVGL</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/espressif.html#configuration">Configuration</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/espressif.html#using-lvgl-esp32-drivers-in-esp-idf-project">Using lvgl_esp32_drivers in ESP-IDF project</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="get-started/arduino.html">Arduino</a><ul>
<li class="toctree-l3"><a class="reference internal" href="get-started/arduino.html#get-the-lvgl-arduino-library">Get the LVGL Arduino library</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/arduino.html#set-up-drivers">Set up drivers</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/arduino.html#configure-lvgl">Configure LVGL</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/arduino.html#initialize-and-run-lvgl">Initialize and run LVGL</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/arduino.html#use-the-examples-and-demos">Use the examples and demos</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/arduino.html#debugging-and-logging">Debugging and logging</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="get-started/micropython.html">Micropython</a><ul>
<li class="toctree-l3"><a class="reference internal" href="get-started/micropython.html#what-is-micropython">What is Micropython?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/micropython.html#highlights-of-micropython">Highlights of Micropython</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/micropython.html#why-micropython-lvgl">Why Micropython + LVGL?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/micropython.html#here-are-some-advantages-of-using-lvgl-in-micropython">Here are some advantages of using LVGL in Micropython:</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/micropython.html#micropython-lvgl-could-be-used-for">Micropython + LVGL could be used for:</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/micropython.html#so-what-does-it-look-like">So what does it look like?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/micropython.html#a-simple-example">A simple example</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/micropython.html#how-can-i-use-it">How can I use it?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/micropython.html#online-simulator">Online Simulator</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/micropython.html#pc-simulator">PC Simulator</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/micropython.html#embedded-platform">Embedded platform</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/micropython.html#where-can-i-find-more-information">Where can I find more information?</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="get-started/tasmota-berry.html">Tasmota and berry</a><ul>
<li class="toctree-l3"><a class="reference internal" href="get-started/tasmota-berry.html#what-is-tasmota">What is Tasmota?</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/tasmota-berry.html#what-is-berry">What is Berry?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/tasmota-berry.html#highlights-of-berry">Highlights of Berry</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/tasmota-berry.html#why-lvgl-tasmota-berry">Why LVGL + Tasmota + Berry?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/tasmota-berry.html#tasmota-berry-lvgl-could-be-used-for">Tasmota + Berry + LVGL could be used for:</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/tasmota-berry.html#so-what-does-it-look-like">So what does it look like?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/tasmota-berry.html#a-simple-example">A simple example</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/tasmota-berry.html#how-can-i-use-it">How can I use it?</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/tasmota-berry.html#where-can-i-find-more-information">Where can I find more information?</a><ul>
<li class="toctree-l4"><a class="reference external" href="https://tasmota.github.io/docs/">Tasmota Documentation</a></li>
<li class="toctree-l4"><a class="reference external" href="https://github.com/berry-lang/berry/wiki/Reference">Berry Documentation</a></li>
<li class="toctree-l4"><a class="reference external" href="https://tasmota.github.io/docs/LVGL/">Tasmota LVGL Berry documentation</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="get-started/nuttx.html">NuttX RTOS</a><ul>
<li class="toctree-l3"><a class="reference internal" href="get-started/nuttx.html#what-is-nuttx">What is NuttX?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/nuttx.html#highlights-of-nuttx">Highlights of NuttX</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/nuttx.html#why-nuttx-lvgl">Why NuttX + LVGL?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/nuttx.html#here-are-some-advantages-of-using-lvgl-in-nuttx">Here are some advantages of using LVGL in NuttX</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/nuttx.html#nuttx-lvgl-could-be-used-for">NuttX + LVGL could be used for</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/nuttx.html#how-to-get-started-with-nuttx-and-lvgl">How to get started with NuttX and LVGL?</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/nuttx.html#first-you-need-to-install-the-pre-requisites-on-your-system">First you need to install the pre-requisites on your system</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/nuttx.html#now-let-s-create-a-workspace-to-save-our-files">Now let's create a workspace to save our files</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/nuttx.html#clone-the-nuttx-and-apps-repositories">Clone the NuttX and Apps repositories:</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/nuttx.html#configure-nuttx-to-use-the-stm32f429i-disco-board-and-the-lvgl-demo">Configure NuttX to use the stm32f429i-disco board and the LVGL Demo</a></li>
<li class="toctree-l4"><a class="reference internal" href="get-started/nuttx.html#flashing-the-firmware-in-the-board-using-openocd">Flashing the firmware in the board using OpenOCD:</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/nuttx.html#where-can-i-find-more-information">Where can I find more information?</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="get-started/rt-thread.html">RT-Thread RTOS</a><ul>
<li class="toctree-l3"><a class="reference internal" href="get-started/rt-thread.html#what-is-rt-thread">What is RT-Thread?</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/rt-thread.html#how-to-run-lvgl-on-rt-thread">How to run LVGL on RT-Thread?</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="get-started/cmake.html">CMake</a><ul>
<li class="toctree-l3"><a class="reference external" href="https://docs.espressif.com/projects/esp-idf/en/v3.3/get-started-cmake/index.html">Espressif (ESP32)</a></li>
<li class="toctree-l3"><a class="reference external" href="https://docs.micropython.org/en/v1.15/develop/cmodules.html">MicroPython</a></li>
<li class="toctree-l3"><a class="reference external" href="https://docs.zephyrproject.org/latest/guides/zephyr_cmake_package.html">Zephyr</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/cmake.html#prerequisites">Prerequisites</a><ul>
<li class="toctree-l4"><a class="reference external" href="https://www.gnu.org/software/make/">Make</a></li>
<li class="toctree-l4"><a class="reference external" href="https://ninja-build.org/">Ninja</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/cmake.html#building-lvgl-with-cmake">Building LVGL with CMake</a><ul>
<li class="toctree-l4"><a class="reference internal" href="get-started/cmake.html#additional-cmake-options">Additional CMake options</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="get-started/cmake.html#building-lvgl-examples-with-cmake">Building LVGL examples with CMake</a></li>
<li class="toctree-l3"><a class="reference internal" href="get-started/cmake.html#building-lvgl-drivers-and-demos-with-cmake">Building LVGL drivers and demos with CMake</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="porting/index.html">Porting</a><ul>
<li class="toctree-l2"><a class="reference internal" href="porting/project.html">Set up a project</a><ul>
<li class="toctree-l3"><a class="reference internal" href="porting/project.html#get-the-library">Get the library</a></li>
<li class="toctree-l3"><a class="reference internal" href="porting/project.html#add-lvgl-to-your-project">Add lvgl to your project</a><ul>
<li class="toctree-l4"><a class="reference internal" href="porting/project.html#automatically-add-files">Automatically add files</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/project.html#make-and-cmake">Make and CMake</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/project.html#other-platforms-and-tools">Other platforms and tools</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/project.html#demos-and-examples">Demos and Examples</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="porting/project.html#configuration-file">Configuration file</a></li>
<li class="toctree-l3"><a class="reference internal" href="porting/project.html#initialization">Initialization</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="porting/display.html">Display interface</a><ul>
<li class="toctree-l3"><a class="reference internal" href="porting/display.html#draw-buffer">Draw buffer</a></li>
<li class="toctree-l3"><a class="reference internal" href="porting/display.html#buffering-modes">Buffering modes</a><ul>
<li class="toctree-l4"><a class="reference internal" href="porting/display.html#one-buffer">One buffer</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/display.html#two-buffers">Two buffers</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/display.html#full-refresh">Full refresh</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/display.html#direct-mode">Direct mode</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="porting/display.html#display-driver">Display driver</a><ul>
<li class="toctree-l4"><a class="reference internal" href="porting/display.html#mandatory-fields">Mandatory fields</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/display.html#optional-fields">Optional fields</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/display.html#examples">Examples</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="porting/display.html#rotation">Rotation</a></li>
<li class="toctree-l3"><a class="reference internal" href="porting/display.html#further-reading">Further reading</a></li>
<li class="toctree-l3"><a class="reference internal" href="porting/display.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="porting/indev.html">Input device interface</a><ul>
<li class="toctree-l3"><a class="reference internal" href="porting/indev.html#types-of-input-devices">Types of input devices</a><ul>
<li class="toctree-l4"><a class="reference internal" href="porting/indev.html#touchpad-mouse-or-any-pointer">Touchpad, mouse or any pointer</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/indev.html#keypad-or-keyboard">Keypad or keyboard</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/indev.html#encoder">Encoder</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/indev.html#button">Button</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="porting/indev.html#other-features">Other features</a><ul>
<li class="toctree-l4"><a class="reference internal" href="porting/indev.html#parameters">Parameters</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/indev.html#feedback">Feedback</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/indev.html#associating-with-a-display">Associating with a display</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/indev.html#buffered-reading">Buffered reading</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="porting/indev.html#further-reading">Further reading</a></li>
<li class="toctree-l3"><a class="reference internal" href="porting/indev.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="porting/tick.html">Tick interface</a><ul>
<li class="toctree-l3"><a class="reference internal" href="porting/tick.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="porting/task-handler.html">Task Handler</a></li>
<li class="toctree-l2"><a class="reference internal" href="porting/sleep.html">Sleep management</a></li>
<li class="toctree-l2"><a class="reference internal" href="porting/os.html">Operating system and interrupts</a><ul>
<li class="toctree-l3"><a class="reference internal" href="porting/os.html#tasks-and-threads">Tasks and threads</a></li>
<li class="toctree-l3"><a class="reference internal" href="porting/os.html#interrupts">Interrupts</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="porting/log.html">Logging</a><ul>
<li class="toctree-l3"><a class="reference internal" href="porting/log.html#log-level">Log level</a></li>
<li class="toctree-l3"><a class="reference internal" href="porting/log.html#printing-logs">Printing logs</a><ul>
<li class="toctree-l4"><a class="reference internal" href="porting/log.html#logging-with-printf">Logging with printf</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/log.html#custom-log-function">Custom log function</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="porting/log.html#add-logs">Add logs</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="porting/gpu.html">Add custom GPU</a><ul>
<li class="toctree-l3"><a class="reference internal" href="porting/gpu.html#draw-context">Draw context</a><ul>
<li class="toctree-l4"><a class="reference internal" href="porting/gpu.html#fields">Fields</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/gpu.html#initialization">Initialization</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="porting/gpu.html#software-renderer">Software renderer</a><ul>
<li class="toctree-l4"><a class="reference internal" href="porting/gpu.html#blend-callback">Blend callback</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="porting/gpu.html#extend-the-software-renderer">Extend the software renderer</a><ul>
<li class="toctree-l4"><a class="reference internal" href="porting/gpu.html#new-blend-callback">New blend callback</a></li>
<li class="toctree-l4"><a class="reference internal" href="porting/gpu.html#new-rectangle-drawer">New rectangle drawer</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="porting/gpu.html#fully-custom-draw-engine">Fully custom draw engine</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="overview/index.html">Overview</a><ul>
<li class="toctree-l2"><a class="reference internal" href="overview/object.html">Objects</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/object.html#attributes">Attributes</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#basic-attributes">Basic attributes</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#specific-attributes">Specific attributes</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/object.html#working-mechanisms">Working mechanisms</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#parent-child-structure">Parent-child structure</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#moving-together">Moving together</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#visibility-only-on-the-parent">Visibility only on the parent</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#create-and-delete-objects">Create and delete objects</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/object.html#screens">Screens</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#create-screens">Create screens</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#get-the-active-screen">Get the active screen</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#load-screens">Load screens</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#layers">Layers</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/object.html#handling-multiple-displays">Handling multiple displays</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/object.html#parts">Parts</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/object.html#states">States</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/object.html#snapshot">Snapshot</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/coords.html">Positions, sizes, and layouts</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/coords.html#overview">Overview</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#units">Units</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#boxing-model">Boxing model</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#important-notes">Important notes</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/coords.html#position">Position</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#simple-way">Simple way</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#align">Align</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/coords.html#size">Size</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#id1">Simple way</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/coords.html#using-styles">Using styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/coords.html#translation">Translation</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/coords.html#transformation">Transformation</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#min-and-max-size">Min and Max size</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/coords.html#layout">Layout</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#id2">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#built-in-layout">Built-in layout</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#flags">Flags</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/coords.html#adding-new-layouts">Adding new layouts</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/coords.html#examples">Examples</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/style.html">Styles</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#states">States</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#cascading-styles">Cascading styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#inheritance">Inheritance</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#parts">Parts</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#initialize-styles-and-set-get-properties">Initialize styles and set/get properties</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#add-and-remove-styles-to-a-widget">Add and remove styles to a widget</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#add-styles">Add styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#remove-styles">Remove styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#report-style-changes">Report style changes</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#get-a-property-s-value-on-an-object">Get a property's value on an object</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#local-styles">Local styles</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#properties">Properties</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#typical-background-properties">Typical background properties</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#transitions">Transitions</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#color-filter">Color filter</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#themes">Themes</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#extending-themes">Extending themes</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#examples">Examples</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#size-styles">Size styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#background-styles">Background styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#border-styles">Border styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#outline-styles">Outline styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#shadow-styles">Shadow styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#image-styles">Image styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#arc-styles">Arc styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#text-styles">Text styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#line-styles">Line styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#transition">Transition</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#using-multiple-styles">Using multiple styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#id1">Local styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#add-styles-to-parts-and-states">Add styles to parts and states</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style.html#extending-the-current-theme">Extending the current theme</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/style-props.html">Style properties</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#size-and-position">Size and position</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#width">width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#min-width">min_width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#max-width">max_width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#height">height</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#min-height">min_height</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#max-height">max_height</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#x">x</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#y">y</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#align">align</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#transform-width">transform_width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#transform-height">transform_height</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#translate-x">translate_x</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#translate-y">translate_y</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#transform-zoom">transform_zoom</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#transform-angle">transform_angle</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#padding">Padding</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#pad-top">pad_top</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#pad-bottom">pad_bottom</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#pad-left">pad_left</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#pad-right">pad_right</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#pad-row">pad_row</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#pad-column">pad_column</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#background">Background</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-color">bg_color</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-opa">bg_opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-grad-color">bg_grad_color</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-grad-dir">bg_grad_dir</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-main-stop">bg_main_stop</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-grad-stop">bg_grad_stop</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-grad">bg_grad</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-dither-mode">bg_dither_mode</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-img-src">bg_img_src</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-img-opa">bg_img_opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-img-recolor">bg_img_recolor</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-img-recolor-opa">bg_img_recolor_opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#bg-img-tiled">bg_img_tiled</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#border">Border</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#border-color">border_color</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#border-opa">border_opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#border-width">border_width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#border-side">border_side</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#border-post">border_post</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#outline">Outline</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#outline-width">outline_width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#outline-color">outline_color</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#outline-opa">outline_opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#outline-pad">outline_pad</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#shadow">Shadow</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#shadow-width">shadow_width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#shadow-ofs-x">shadow_ofs_x</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#shadow-ofs-y">shadow_ofs_y</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#shadow-spread">shadow_spread</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#shadow-color">shadow_color</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#shadow-opa">shadow_opa</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#image">Image</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#img-opa">img_opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#img-recolor">img_recolor</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#img-recolor-opa">img_recolor_opa</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#line">Line</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#line-width">line_width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#line-dash-width">line_dash_width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#line-dash-gap">line_dash_gap</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#line-rounded">line_rounded</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#line-color">line_color</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#line-opa">line_opa</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#arc">Arc</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#arc-width">arc_width</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#arc-rounded">arc_rounded</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#arc-color">arc_color</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#arc-opa">arc_opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#arc-img-src">arc_img_src</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#text">Text</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#text-color">text_color</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#text-opa">text_opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#text-font">text_font</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#text-letter-space">text_letter_space</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#text-line-space">text_line_space</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#text-decor">text_decor</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#text-align">text_align</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/style-props.html#miscellaneous">Miscellaneous</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#radius">radius</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#clip-corner">clip_corner</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#opa">opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#color-filter-dsc">color_filter_dsc</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#color-filter-opa">color_filter_opa</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#anim-time">anim_time</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#anim-speed">anim_speed</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#transition">transition</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#blend-mode">blend_mode</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#layout">layout</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/style-props.html#base-dir">base_dir</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/scroll.html">Scroll</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/scroll.html#overview">Overview</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#scrollbar">Scrollbar</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#events">Events</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/scroll.html#basic-example">Basic example</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/scroll.html#features-of-scrolling">Features of scrolling</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#scrollable">Scrollable</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#scroll-chain">Scroll chain</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#scroll-momentum">Scroll momentum</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#elastic-scroll">Elastic scroll</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#snapping">Snapping</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#scroll-one">Scroll one</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#scroll-on-focus">Scroll on focus</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/scroll.html#scroll-manually">Scroll manually</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/scroll.html#self-size">Self size</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/scroll.html#examples">Examples</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#nested-scrolling">Nested scrolling</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#id1">Snapping</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#floating-button">Floating button</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#styling-the-scrollbars">Styling the scrollbars</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#right-to-left-scrolling">Right to left scrolling</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/scroll.html#translate-on-scroll">Translate on scroll</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/layer.html">Layers</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/layer.html#order-of-creation">Order of creation</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/layer.html#bring-to-the-foreground">Bring to the foreground</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/layer.html#top-and-sys-layers">Top and sys layers</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/event.html">Events</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/event.html#add-events-to-the-object">Add events to the object</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/event.html#remove-event-s-from-an-object">Remove event(s) from an object</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/event.html#event-codes">Event codes</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/event.html#input-device-events">Input device events</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/event.html#drawing-events">Drawing events</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/event.html#other-events">Other events</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/event.html#special-events">Special events</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/event.html#custom-events">Custom events</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/event.html#sending-events">Sending events</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/event.html#refresh-event">Refresh event</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/event.html#fields-of-lv-event-t">Fields of lv_event_t</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/event.html#event-bubbling">Event bubbling</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/event.html#examples">Examples</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/event.html#button-click-event">Button click event</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/event.html#handle-multiple-events">Handle multiple events</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/event.html#id1">Event bubbling</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/indev.html">Input devices</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/indev.html#pointers">Pointers</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/indev.html#cursor">Cursor</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/indev.html#gestures">Gestures</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/indev.html#keypad-and-encoder">Keypad and encoder</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/indev.html#groups">Groups</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/indev.html#styling">Styling</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/indev.html#api">API</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/indev.html#input-device">Input device</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/indev.html#id1">Groups</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/display.html">Displays</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/display.html#multiple-display-support">Multiple display support</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/display.html#using-only-one-display">Using only one display</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/display.html#mirror-display">Mirror display</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/display.html#split-image">Split image</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/display.html#screens">Screens</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/display.html#transparent-screens">Transparent screens</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/display.html#features-of-displays">Features of displays</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/display.html#inactivity">Inactivity</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/display.html#background">Background</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/display.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/color.html">Colors</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/color.html#creating-colors">Creating colors</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/color.html#rgb">RGB</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/color.html#hsv">HSV</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/color.html#palette">Palette</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/color.html#modify-and-mix-colors">Modify and mix colors</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/color.html#built-in-colors">Built-in colors</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/color.html#opacity">Opacity</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/color.html#color-types">Color types</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/color.html#convert-color">Convert color</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/color.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/font.html">Fonts</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/font.html#unicode-support">Unicode support</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/font.html#built-in-fonts">Built-in fonts</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/font.html#normal-fonts">Normal fonts</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/font.html#special-fonts">Special fonts</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/font.html#special-features">Special features</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/font.html#bidirectional-support">Bidirectional support</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/font.html#arabic-and-persian-support">Arabic and Persian support</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/font.html#subpixel-rendering">Subpixel rendering</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/font.html#compressed-fonts">Compressed fonts</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/font.html#add-a-new-font">Add a new font</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/font.html#add-new-symbols">Add new symbols</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/font.html#load-a-font-at-run-time">Load a font at run-time</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/font.html#add-a-new-font-engine">Add a new font engine</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/font.html#use-font-fallback">Use font fallback</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/image.html">Images</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/image.html#store-images">Store images</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#variables">Variables</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#files">Files</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/image.html#color-formats">Color formats</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/image.html#add-and-use-images">Add and use images</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#online-converter">Online converter</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#manually-create-an-image">Manually create an image</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#use-images">Use images</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/image.html#image-decoder">Image decoder</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#custom-image-formats">Custom image formats</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#register-an-image-decoder">Register an image decoder</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#manually-use-an-image-decoder">Manually use an image decoder</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/image.html#image-caching">Image caching</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#cache-size">Cache size</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#value-of-images">Value of images</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#memory-usage">Memory usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#clean-the-cache">Clean the cache</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/image.html#api">API</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/image.html#image-buffer">Image buffer</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/file-system.html">File system</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/file-system.html#ready-to-use-drivers">Ready to use drivers</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/file-system.html#adding-a-driver">Adding a driver</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/file-system.html#registering-a-driver">Registering a driver</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/file-system.html#implementing-the-callbacks">Implementing the callbacks</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/file-system.html#other-callbacks">Other callbacks</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/file-system.html#usage-example">Usage example</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/file-system.html#use-drives-for-images">Use drives for images</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/file-system.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/animation.html">Animations</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/animation.html#create-an-animation">Create an animation</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/animation.html#animation-path">Animation path</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/animation.html#speed-vs-time">Speed vs time</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/animation.html#delete-animations">Delete animations</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/animation.html#timeline">Timeline</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/animation.html#examples">Examples</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/animation.html#start-animation-on-an-event">Start animation on an event</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/animation.html#playback-animation">Playback animation</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/animation.html#animation-timeline">Animation timeline</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/animation.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/timer.html">Timers</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/timer.html#create-a-timer">Create a timer</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/timer.html#ready-and-reset">Ready and Reset</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/timer.html#set-parameters">Set parameters</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/timer.html#repeat-count">Repeat count</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/timer.html#measure-idle-time">Measure idle time</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/timer.html#asynchronous-calls">Asynchronous calls</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/timer.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/drawing.html">Drawing</a><ul>
<li class="toctree-l3"><a class="reference internal" href="overview/drawing.html#mechanism-of-screen-refreshing">Mechanism of screen refreshing</a></li>
<li class="toctree-l3"><a class="reference internal" href="overview/drawing.html#masking">Masking</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/drawing.html#using-masks">Using masks</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="overview/drawing.html#hook-drawing">Hook drawing</a><ul>
<li class="toctree-l4"><a class="reference internal" href="overview/drawing.html#main-drawing">Main drawing</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/drawing.html#post-drawing">Post drawing</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/drawing.html#part-drawing">Part drawing</a></li>
<li class="toctree-l4"><a class="reference internal" href="overview/drawing.html#others">Others</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="overview/new_widget.html">New widget</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="widgets/index.html">Widgets</a><ul>
<li class="toctree-l2"><a class="reference internal" href="widgets/obj.html">Base object (lv_obj)</a><ul>
<li class="toctree-l3"><a class="reference internal" href="widgets/obj.html#overview">Overview</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#coordinates">Coordinates</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#parents-and-children">Parents and children</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#display-and-screens">Display and Screens</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#styles">Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#flags">Flags</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#groups">Groups</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#extended-click-area">Extended click area</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/obj.html#id1">Events</a></li>
<li class="toctree-l3"><a class="reference internal" href="widgets/obj.html#keys">Keys</a></li>
<li class="toctree-l3"><a class="reference internal" href="widgets/obj.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#base-objects-with-custom-styles">Base objects with custom styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/obj.html#make-an-object-draggable">Make an object draggable</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/obj.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="widgets/core/index.html">Core widgets</a><ul>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/arc.html">Arc (lv_arc)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/arc.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/arc.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/arc.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/arc.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/arc.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/arc.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/arc.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/bar.html">Bar (lv_bar)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/bar.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/bar.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/bar.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/bar.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/bar.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/bar.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/bar.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/btn.html">Button (lv_btn)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btn.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btn.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btn.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btn.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btn.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btn.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btn.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/btnmatrix.html">Button matrix (lv_btnmatrix)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btnmatrix.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btnmatrix.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btnmatrix.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btnmatrix.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btnmatrix.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btnmatrix.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/btnmatrix.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/canvas.html">Canvas (lv_canvas)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/canvas.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/canvas.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/canvas.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/canvas.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/canvas.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/canvas.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/canvas.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/checkbox.html">Checkbox (lv_checkbox)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/checkbox.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/checkbox.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/checkbox.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/checkbox.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/checkbox.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/checkbox.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/checkbox.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/dropdown.html">Drop-down list (lv_dropdown)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/dropdown.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/dropdown.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/dropdown.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/dropdown.html#id1">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/dropdown.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/dropdown.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/dropdown.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/dropdown.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/img.html">Image (lv_img)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/img.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/img.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/img.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/img.html#transformations">Transformations</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/img.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/img.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/img.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/img.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/label.html">Label (lv_label)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/label.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/label.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/label.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/label.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/label.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/label.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/label.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/line.html">Line (lv_line)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/line.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/line.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/line.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/line.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/line.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/line.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/line.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/roller.html">Roller (lv_roller)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/roller.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/roller.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/roller.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/roller.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/roller.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/roller.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/roller.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/slider.html">Slider (lv_slider)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/slider.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/slider.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/slider.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/slider.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/slider.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/slider.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/slider.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/switch.html">Switch (lv_switch)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/switch.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/switch.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/switch.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/switch.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/switch.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/switch.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/switch.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/table.html">Table (lv_table)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/table.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/table.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/table.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/table.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/table.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/table.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/table.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/core/textarea.html">Text area (lv_textarea)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/textarea.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/textarea.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/textarea.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/textarea.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/textarea.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/textarea.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/core/textarea.html#api">API</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="widgets/extra/index.html">Extra widgets</a><ul>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/animimg.html">Animation Image (lv_animimg)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/animimg.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/animimg.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/animimg.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/animimg.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/animimg.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/animimg.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/animimg.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/calendar.html">Calendar (lv_calendar)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/calendar.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/calendar.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/calendar.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/calendar.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/calendar.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/calendar.html#headers">Headers</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/calendar.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/calendar.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/chart.html">Chart (lv_chart)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/chart.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/chart.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/chart.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/chart.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/chart.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/chart.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/chart.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/colorwheel.html">Color wheel (lv_colorwheel)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/colorwheel.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/colorwheel.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/colorwheel.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/colorwheel.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/colorwheel.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/colorwheel.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/colorwheel.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/imgbtn.html">Image button (lv_imgbtn)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/imgbtn.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/imgbtn.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/imgbtn.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/imgbtn.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/imgbtn.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/imgbtn.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/imgbtn.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/keyboard.html">Keyboard (lv_keyboard)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/keyboard.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/keyboard.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/keyboard.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/keyboard.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/keyboard.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/keyboard.html#examples">Examples</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/keyboard.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/led.html">LED (lv_led)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/led.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/led.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/led.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/led.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/led.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/led.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/led.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/list.html">List (lv_list)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/list.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/list.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/list.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/list.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/list.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/list.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/list.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/menu.html">Menu (lv_menu)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/menu.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/menu.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/menu.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/menu.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/menu.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/menu.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/menu.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/meter.html">Meter (lv_meter)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/meter.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/meter.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/meter.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/meter.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/meter.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/meter.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/meter.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/msgbox.html">Message box (lv_msgbox)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/msgbox.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/msgbox.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/msgbox.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/msgbox.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/msgbox.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/msgbox.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/msgbox.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/span.html">Span (lv_span)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/span.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/span.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/span.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/span.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/span.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/span.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/span.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/spinbox.html">Spinbox (lv_spinbox)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinbox.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinbox.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinbox.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinbox.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinbox.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinbox.html#api">API</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinbox.html#id1">Example</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/spinner.html">Spinner (lv_spinner)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinner.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinner.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinner.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinner.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinner.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinner.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/spinner.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/tabview.html">Tabview (lv_tabview)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tabview.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tabview.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tabview.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tabview.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tabview.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tabview.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tabview.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/tileview.html">Tile view (lv_tileview)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tileview.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tileview.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tileview.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tileview.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tileview.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tileview.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/tileview.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="widgets/extra/win.html">Window (lv_win)</a><ul>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/win.html#overview">Overview</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/win.html#parts-and-styles">Parts and Styles</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/win.html#usage">Usage</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/win.html#get-the-parts">Get the parts</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/win.html#events">Events</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/win.html#keys">Keys</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/win.html#example">Example</a></li>
<li class="toctree-l4"><a class="reference internal" href="widgets/extra/win.html#api">API</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="layouts/index.html">Layouts</a><ul>
<li class="toctree-l2"><a class="reference internal" href="layouts/flex.html">Flex</a><ul>
<li class="toctree-l3"><a class="reference internal" href="layouts/flex.html#overview">Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="layouts/flex.html#terms">Terms</a></li>
<li class="toctree-l3"><a class="reference internal" href="layouts/flex.html#simple-interface">Simple interface</a><ul>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#flex-flow">Flex flow</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#flex-align">Flex align</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#flex-grow">Flex grow</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="layouts/flex.html#style-interface">Style interface</a><ul>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#internal-padding">Internal padding</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="layouts/flex.html#other-features">Other features</a><ul>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#rtl">RTL</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#new-track">New track</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="layouts/flex.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#a-simple-row-and-a-column-layout-with-flexbox">A simple row and a column layout with flexbox</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#arrange-items-in-rows-with-wrap-and-even-spacing">Arrange items in rows with wrap and even spacing</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#demonstrate-flex-grow">Demonstrate flex grow</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#id1">Demonstrate flex grow.</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#demonstrate-column-and-row-gap-style-properties">Demonstrate column and row gap style properties</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/flex.html#rtl-base-direction-changes-order-of-the-items">RTL base direction changes order of the items</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="layouts/flex.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="layouts/grid.html">Grid</a><ul>
<li class="toctree-l3"><a class="reference internal" href="layouts/grid.html#overview">Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="layouts/grid.html#terms">Terms</a></li>
<li class="toctree-l3"><a class="reference internal" href="layouts/grid.html#simple-interface">Simple interface</a><ul>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#grid-descriptors">Grid descriptors</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#grid-items">Grid items</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#grid-align">Grid align</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="layouts/grid.html#style-interface">Style interface</a><ul>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#internal-padding">Internal padding</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="layouts/grid.html#other-features">Other features</a><ul>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#rtl">RTL</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="layouts/grid.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#a-simple-grid">A simple grid</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#demonstrate-cell-placement-and-span">Demonstrate cell placement and span</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#demonstrate-grid-s-free-unit">Demonstrate grid's &quot;free unit&quot;</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#demonstrate-track-placement">Demonstrate track placement</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#demonstrate-column-and-row-gap">Demonstrate column and row gap</a></li>
<li class="toctree-l4"><a class="reference internal" href="layouts/grid.html#demonstrate-rtl-direction-on-grid">Demonstrate RTL direction on grid</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="layouts/grid.html#api">API</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="libs/index.html">3rd party libraries</a><ul>
<li class="toctree-l2"><a class="reference internal" href="libs/fsdrv.html">File System Interfaces</a><ul>
<li class="toctree-l3"><a class="reference internal" href="libs/fsdrv.html#usage">Usage</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="libs/bmp.html">BMP decoder</a><ul>
<li class="toctree-l3"><a class="reference internal" href="libs/bmp.html#limitations">Limitations</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/bmp.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/bmp.html#open-a-bmp-image-from-file">Open a BMP image from file</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/bmp.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="libs/sjpg.html">JPG decoder</a><ul>
<li class="toctree-l3"><a class="reference internal" href="libs/sjpg.html#overview">Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/sjpg.html#usage">Usage</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/sjpg.html#converter">Converter</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/sjpg.html#converting-jpg-to-c-array">Converting JPG to C array</a></li>
<li class="toctree-l4"><a class="reference internal" href="libs/sjpg.html#converting-jpg-to-sjpg">Converting JPG to SJPG</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/sjpg.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/sjpg.html#load-an-sjpg-image">Load an SJPG image</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/sjpg.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="libs/png.html">PNG decoder</a><ul>
<li class="toctree-l3"><a class="reference internal" href="libs/png.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/png.html#open-a-png-image-from-file-and-variable">Open a PNG image from file and variable</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/png.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="libs/gif.html">GIF decoder</a><ul>
<li class="toctree-l3"><a class="reference internal" href="libs/gif.html#convert-gif-files-to-c-array">Convert GIF files to C array</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/gif.html#use-gif-images-from-file">Use GIF images from file</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/gif.html#memory-requirements">Memory requirements</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/gif.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/gif.html#open-a-gif-image-from-file-and-variable">Open a GIF image from file and variable</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/gif.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="libs/freetype.html">FreeType support</a><ul>
<li class="toctree-l3"><a class="reference internal" href="libs/freetype.html#install-freetype">Install FreeType</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/freetype.html#add-freetype-to-your-project">Add FreeType to your project</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/freetype.html#usage">Usage</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/freetype.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/freetype.html#open-a-front-with-freetype">Open a front with FreeType</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/freetype.html#learn-more">Learn more</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/freetype.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="libs/qrcode.html">QR code</a><ul>
<li class="toctree-l3"><a class="reference internal" href="libs/qrcode.html#get-started">Get started</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/qrcode.html#notes">Notes</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/qrcode.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/qrcode.html#create-a-qr-code">Create a QR Code</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/qrcode.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="libs/rlottie.html">Lottie player</a><ul>
<li class="toctree-l3"><a class="reference internal" href="libs/rlottie.html#build-rlottie">Build Rlottie</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/rlottie.html#usage">Usage</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/rlottie.html#use-rlottie-from-file">Use Rlottie from file</a></li>
<li class="toctree-l4"><a class="reference internal" href="libs/rlottie.html#use-rlottie-from-raw-string-data">Use Rlottie from raw string data</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/rlottie.html#getting-animations">Getting animations</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/rlottie.html#controlling-animations">Controlling animations</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/rlottie.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/rlottie.html#load-a-lottie-animation-from-raw-data">Load a Lottie animation from raw data</a></li>
<li class="toctree-l4"><a class="reference internal" href="libs/rlottie.html#load-a-lottie-animation-from-a-file">Load a Lottie animation from a file</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/rlottie.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="libs/ffmpeg.html">FFmpeg support</a><ul>
<li class="toctree-l3"><a class="reference internal" href="libs/ffmpeg.html#install-ffmpeg">Install FFmpeg</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/ffmpeg.html#add-ffmpeg-to-your-project">Add FFmpeg to your project</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/ffmpeg.html#usage">Usage</a></li>
<li class="toctree-l3"><a class="reference internal" href="libs/ffmpeg.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="libs/ffmpeg.html#decode-image">Decode image</a></li>
<li class="toctree-l4"><a class="reference internal" href="libs/ffmpeg.html#decode-video">Decode video</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="libs/ffmpeg.html#api">API</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="others/index.html">Others</a><ul>
<li class="toctree-l2"><a class="reference internal" href="others/snapshot.html">Snapshot</a><ul>
<li class="toctree-l3"><a class="reference internal" href="others/snapshot.html#usage">Usage</a><ul>
<li class="toctree-l4"><a class="reference internal" href="others/snapshot.html#free-the-image">Free the Image</a></li>
<li class="toctree-l4"><a class="reference internal" href="others/snapshot.html#use-existing-buffer">Use Existing Buffer</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="others/snapshot.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="others/snapshot.html#simple-snapshot-example">Simple snapshot example</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="others/snapshot.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="others/monkey.html">Monkey</a><ul>
<li class="toctree-l3"><a class="reference internal" href="others/monkey.html#usage">Usage</a></li>
<li class="toctree-l3"><a class="reference internal" href="others/monkey.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="others/monkey.html#touchpad-monkey-example">Touchpad monkey example</a></li>
<li class="toctree-l4"><a class="reference internal" href="others/monkey.html#encoder-monkey-example">Encoder monkey example</a></li>
<li class="toctree-l4"><a class="reference internal" href="others/monkey.html#button-monkey-example">Button monkey example</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="others/monkey.html#api">API</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="others/gridnav.html">Grid navigation</a><ul>
<li class="toctree-l3"><a class="reference internal" href="others/gridnav.html#usage">Usage</a></li>
<li class="toctree-l3"><a class="reference internal" href="others/gridnav.html#focusable-objects">Focusable objects</a></li>
<li class="toctree-l3"><a class="reference internal" href="others/gridnav.html#example">Example</a><ul>
<li class="toctree-l4"><a class="reference internal" href="others/gridnav.html#basic-grid-navigation">Basic grid navigation</a></li>
<li class="toctree-l4"><a class="reference internal" href="others/gridnav.html#grid-navigation-on-a-list">Grid navigation on a list</a></li>
<li class="toctree-l4"><a class="reference internal" href="others/gridnav.html#nested-grid-navigations">Nested grid navigations</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="others/gridnav.html#api">API</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="CONTRIBUTING.html">Contributing</a><ul>
<li class="toctree-l2"><a class="reference internal" href="CONTRIBUTING.html#introduction">Introduction</a></li>
<li class="toctree-l2"><a class="reference internal" href="CONTRIBUTING.html#pull-request">Pull request</a><ul>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#from-github">From GitHub</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#from-command-line">From command line</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#commit-message-format">Commit message format</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="CONTRIBUTING.html#developer-certification-of-origin-dco">Developer Certification of Origin (DCO)</a><ul>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#overview">Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#accepted-licenses-and-copyright-notices">Accepted licenses and copyright notices</a><ul>
<li class="toctree-l4"><a class="reference internal" href="CONTRIBUTING.html#your-own-work">Your own work</a></li>
<li class="toctree-l4"><a class="reference internal" href="CONTRIBUTING.html#use-code-from-online-source">Use code from online source</a></li>
<li class="toctree-l4"><a class="reference internal" href="CONTRIBUTING.html#use-mit-licensed-code">Use MIT licensed code</a></li>
<li class="toctree-l4"><a class="reference internal" href="CONTRIBUTING.html#use-gpl-licensed-code">Use GPL licensed code</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="CONTRIBUTING.html#ways-to-contribute">Ways to contribute</a><ul>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#give-lvgl-a-star">Give LVGL a Star</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#tell-what-you-have-achieved">Tell what you have achieved</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#write-examples">Write examples</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#improve-the-docs">Improve the docs</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#report-bugs">Report bugs</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#send-fixes">Send fixes</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#join-the-conversations-in-the-forum">Join the conversations in the Forum</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#add-features">Add features</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#become-a-maintainer">Become a maintainer</a></li>
<li class="toctree-l3"><a class="reference internal" href="CONTRIBUTING.html#move-your-project-repository-under-lvgl-organization">Move your project repository under LVGL organization</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="CHANGELOG.html">Changelog</a><ul>
<li class="toctree-l2"><a class="reference internal" href="CHANGELOG.html#v8-2-0-31-january-2022">v8.2.0 31 January 2022</a><ul>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#overview">Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#breaking-changes">Breaking Changes</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#architectural">Architectural</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#new-features">New Features</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#performance">Performance</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#fixes">Fixes</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#examples">Examples</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#docs">Docs</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#ci-and-tests">CI and tests</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="CHANGELOG.html#v8-1-0-10-november-2021">v8.1.0 10 November 2021</a><ul>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#id1">Overview</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#id2">Breaking Changes</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#id3">Architectural</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#id4">New Features</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#id5">Performance</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#id6">Fixes</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#id7">Examples</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#id8">Docs</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#id9">CI and tests</a></li>
<li class="toctree-l3"><a class="reference internal" href="CHANGELOG.html#others">Others</a></li>
</ul>
</li>
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  <div class="section" id="coding-style">
<h1>Coding style<a class="headerlink" href="#coding-style" title="Permalink to this headline">¶</a></h1>
<div class="section" id="file-format">
<h2>File format<a class="headerlink" href="#file-format" title="Permalink to this headline">¶</a></h2>
<p>Use <a class="reference external" href="https://github.com/lvgl/lvgl/blob/master/src/misc/lv_templ.c">misc/lv_templ.c</a> and <a class="reference external" href="https://github.com/lvgl/lvgl/blob/master/src/misc/lv_templ.h">misc/lv_templ.h</a></p>
</div>
<div class="section" id="naming-conventions">
<h2>Naming conventions<a class="headerlink" href="#naming-conventions" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li><p>Words are separated by '_'</p></li>
<li><p>In variable and function names use only lower case letters (e.g. <em>height_tmp</em>)</p></li>
<li><p>In enums and defines use only upper case letters (e.g. <em>e.g. MAX_LINE_NUM</em>)</p></li>
<li><p>Global names (API):</p>
<ul>
<li><p>start with <em>lv</em></p></li>
<li><p>followed by module name: <em>btn</em>, <em>label</em>, <em>style</em> etc.</p></li>
<li><p>followed by the action (for functions): <em>set</em>, <em>get</em>, <em>refr</em> etc.</p></li>
<li><p>closed with the subject: <em>name</em>, <em>size</em>, <em>state</em> etc.</p></li>
</ul>
</li>
<li><p>Typedefs</p>
<ul>
<li><p>prefer <code class="docutils literal notranslate"><span class="pre">typedef</span> <span class="pre">struct</span></code> and <code class="docutils literal notranslate"><span class="pre">typedef</span> <span class="pre">enum</span></code> instead of  <code class="docutils literal notranslate"><span class="pre">struct</span> <span class="pre">name</span></code> and <code class="docutils literal notranslate"><span class="pre">enum</span> <span class="pre">name</span></code></p></li>
<li><p>always end <code class="docutils literal notranslate"><span class="pre">typedef</span> <span class="pre">struct</span></code> and <code class="docutils literal notranslate"><span class="pre">typedef</span> <span class="pre">enum</span></code> type names with <code class="docutils literal notranslate"><span class="pre">_t</span></code></p></li>
</ul>
</li>
<li><p>Abbreviations:</p>
<ul>
<li><p>Only words longer or equal than 6 characters can be abbreviated.</p></li>
<li><p>Abbreviate only if it makes the word at least half as long</p></li>
<li><p>Use only very straightforward and well-known abbreviations (e.g. pos: position, def: default, btn: button)</p></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="coding-guide">
<h2>Coding guide<a class="headerlink" href="#coding-guide" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li><p>Functions:</p>
<ul>
<li><p>Try to write function shorter than is 50 lines</p></li>
<li><p>Always shorter than 200 lines (except very straightforwards)</p></li>
</ul>
</li>
<li><p>Variables:</p>
<ul>
<li><p>One line, one declaration (BAD: char x, y;)</p></li>
<li><p>Use <code class="docutils literal notranslate"><span class="pre">&lt;stdint.h&gt;</span></code> (<em>uint8_t</em>, <em>int32_t</em> etc)</p></li>
<li><p>Declare variables where needed (not all at function start)</p></li>
<li><p>Use the smallest required scope</p></li>
<li><p>Variables in a file (outside functions) are always <em>static</em></p></li>
<li><p>Do not use global variables (use functions to set/get static variables)</p></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="comments">
<h2>Comments<a class="headerlink" href="#comments" title="Permalink to this headline">¶</a></h2>
<p>Before every function have a comment like this:</p>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cm">/**</span>
<span class="cm"> * Return with the screen of an object</span>
<span class="cm"> * @param obj pointer to an object</span>
<span class="cm"> * @return pointer to a screen</span>
<span class="cm"> */</span>
<span class="n">lv_obj_t</span> <span class="o">*</span> <span class="nf">lv_obj_get_scr</span><span class="p">(</span><span class="n">lv_obj_t</span> <span class="o">*</span> <span class="n">obj</span><span class="p">);</span>
</pre></div>
</div>
<p>Always use <code class="docutils literal notranslate"><span class="pre">/*Something*/</span></code> format and NOT <code class="docutils literal notranslate"><span class="pre">//Something</span></code></p>
<p>Write readable code to avoid descriptive comments like:
<code class="docutils literal notranslate"><span class="pre">x++;</span> <span class="pre">/*Add</span> <span class="pre">1</span> <span class="pre">to</span> <span class="pre">x*/</span></code>.
The code should show clearly what you are doing.</p>
<p>You should write <strong>why</strong> have you done this:
<code class="docutils literal notranslate"><span class="pre">x++;</span> <span class="pre">/*Because</span> <span class="pre">of</span> <span class="pre">closing</span> <span class="pre">'\0'</span> <span class="pre">of</span> <span class="pre">the</span> <span class="pre">string*/</span></code></p>
<p>Short &quot;code summaries&quot; of a few lines are accepted. E.g. <code class="docutils literal notranslate"><span class="pre">/*Calculate</span> <span class="pre">the</span> <span class="pre">new</span> <span class="pre">coordinates*/</span></code></p>
<p>In comments use ` ` when referring to a variable. E.g. <code class="docutils literal notranslate"><span class="pre">/*Update</span> <span class="pre">the</span> <span class="pre">value</span> <span class="pre">of</span> <span class="pre">`x_act`*/</span></code></p>
<div class="section" id="formatting">
<h3>Formatting<a class="headerlink" href="#formatting" title="Permalink to this headline">¶</a></h3>
<p>Here is example to show bracket placing and using of white spaces:</p>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cm">/**</span>
<span class="cm"> * Set a new text for a label. Memory will be allocated to store the text by the label.</span>
<span class="cm"> * @param label pointer to a label object</span>
<span class="cm"> * @param text &#39;\0&#39; terminated character string. NULL to refresh with the current text.</span>
<span class="cm"> */</span>
<span class="kt">void</span> <span class="nf">lv_label_set_text</span><span class="p">(</span><span class="n">lv_obj_t</span> <span class="o">*</span> <span class="n">label</span><span class="p">,</span> <span class="k">const</span> <span class="kt">char</span> <span class="o">*</span> <span class="n">text</span><span class="p">)</span>
<span class="p">{</span>   <span class="cm">/*Main brackets of functions in new line*/</span>

    <span class="k">if</span><span class="p">(</span><span class="n">label</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="k">return</span><span class="p">;</span> <span class="cm">/*No bracket only if the command is inline with the if statement*/</span>

    <span class="n">lv_obj_inv</span><span class="p">(</span><span class="n">label</span><span class="p">);</span>

    <span class="n">lv_label_ext_t</span> <span class="o">*</span> <span class="n">ext</span> <span class="o">=</span> <span class="n">lv_obj_get_ext</span><span class="p">(</span><span class="n">label</span><span class="p">);</span>

    <span class="cm">/*Comment before a section*/</span>
    <span class="k">if</span><span class="p">(</span><span class="n">text</span> <span class="o">==</span> <span class="n">ext</span><span class="o">-&gt;</span><span class="n">txt</span> <span class="o">||</span> <span class="n">text</span> <span class="o">==</span> <span class="nb">NULL</span><span class="p">)</span> <span class="p">{</span>  <span class="cm">/*Bracket of statements start inline*/</span>
        <span class="n">lv_label_refr_text</span><span class="p">(</span><span class="n">label</span><span class="p">);</span>
        <span class="k">return</span><span class="p">;</span>
    <span class="p">}</span>

    <span class="p">...</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Use 4 spaces indentation instead of tab.</p>
<p>You can use <strong>astyle</strong> to format the code. Run <code class="docutils literal notranslate"><span class="pre">code-formatter.sh</span></code> from the <code class="docutils literal notranslate"><span class="pre">scrips</span></code> folder.</p>
</div>
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                if(shouldBeLoaded) {
                    let iframe = document.createElement("iframe");
                    iframe.src = entry.target.getAttribute("data-real-src");
                    entry.target.appendChild(iframe);
                } else {
                    let iframe = entry.target.querySelector("iframe");
                    iframe.parentNode.removeChild(iframe);
                }
            }
        });
    }
    const config = {
        rootMargin: '600px 0px',
        threshold: 0.01
    };
    let observer = new IntersectionObserver(onIntersection, config);
    document.querySelectorAll(".lv-example").forEach(iframe => {
        observer.observe(iframe);
    });
});
</script>


</body>
</html>