Scale allows you to have a linear scale with ranges and sections with custom styling.
The scale widget is divided in the following three parts:
- :cpp:enumerator:`LV_PART_MAIN` Main line. See blue line in the example image.
- :cpp:enumerator:`LV_PART_ITEMS` Minor ticks. See red minor ticks in the example image.
- :cpp:enumerator:`LV_PART_INDICATOR` Major ticks and its labels (if enabled). See pink labels and green major ticks in the example image.
The minor and major range (values of each tick) are configured with :cpp:expr:`lv_scale_set_range(scale, minor_range, major_range)`.
Set the number of total ticks with :cpp:expr:`lv_scale_set_total_tick_count(scale, total_tick_count)` and then configure the major tick being every Nth ticks with :cpp:expr:`lv_scale_set_major_tick_every(scale, nth_tick)`.
Labels on major ticks can be configured with :cpp:expr:`lv_scale_set_label_show(scale, show_label)`,
set show_label to true if labels should be drawn, :cpp:expr:`false` to hide them.
If instead of a numerical value in the major ticks a text is required they can be set
with :cpp:expr:`lv_scale_set_text_src(scale, custom_labels)` using NULL as the last element,
i.e. :cpp:expr:`static char * custom_labels[3] = {"One", "Two", NULL};`.
The length of the ticks can be configured with the length style property on the :cpp:enumerator:`LV_PART_INDICATOR` for major ticks and :cpp:enumerator:`LV_PART_ITEMS` for minor ticks, for example with local style: :cpp:expr:`lv_obj_set_style_length(scale, 5, LV_PART_INDICATOR);` for major ticks and :cpp:expr:`lv_obj_set_style_length(scale, 5, LV_PART_ITEMS);` for minor ticks.
A section is the space between a minor and a major range. They can be created with :cpp:expr:`lv_scale_add_section(scale)` and it handles back an :cpp:type:`lv_scale_section_t` pointer.
The range of the section is configured with :cpp:expr:`lv_scale_section_set_range(section, minor_range, major_range)`. The style of each of the three parts of the scale section can be set with :cpp:expr:`lv_scale_section_set_style(section, PART, style_pointer)`, where PART can be :cpp:enumerator:`LV_PART_MAIN`, :cpp:enumerator:`LV_PART_ITEMS` or :cpp:enumerator:`LV_PART_INDICATOR`, :cpp:expr:`style_pointer` should point to a global or static :cpp:type:`lv_style_t` variable.
For labels the following properties can be configured: :cpp:func:`lv_style_set_text_font`, :cpp:func:`lv_style_set_text_color`, :cpp:func:`lv_style_set_text_letter_space`, :cpp:func:`lv_style_set_text_opa`.
For lines (main line, major and minor ticks) the following properties can be configured: :cpp:func:`lv_style_set_line_color`, :cpp:func:`lv_style_set_line_width`.
No events supported by this widget.
No keys supported by this widget.