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cvui.py
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cvui.py
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"""
A (very) simple UI lib built on top of OpenCV drawing primitives.
Version: 2.7
Use of cvui revolves around calling cvui.init() to initialize the lib,
rendering cvui components to a np.ndarray (that you handle yourself) and
finally showing that np.ndarray on the screen using cvui.imshow(), which
is cvui's version of cv2.imshow(). Alternatively you can use cv2.imshow()
to show things, but in such case you must call cvui.update() yourself
before calling cv.imshow().
E.g.:
import numpy as np
import cv2
import cvui
WINDOW_NAME = 'CVUI Hello World!'
frame = np.zeros((200, 500, 3), np.uint8)
cvui.init(WINDOW_NAME)
while (True):
# Fill the frame with a nice color
frame[:] = (49, 52, 49)
cvui.text(frame, x, y, 'Hello world!')
cvui.imshow(WINDOW_NAME, frame)
if cv2.waitKey(20) == 27:
break
Read the full documentation at https://dovyski.github.io/cvui/
Copyright (c) 2018 Fernando Bevilacqua <dovyski@gmail.com>
Licensed under the MIT license.
"""
import cv2
import numpy as np
import sys
def main():
# TODO: make something here?
return 0
if __name__ == '__main__':
main()
# Lib version
VERSION = '2.7'
# Constants regarding component interactions
ROW = 0
COLUMN = 1
DOWN = 2
CLICK = 3
OVER = 4
OUT = 5
UP = 6
IS_DOWN = 7
# Constants regarding mouse buttons
LEFT_BUTTON = 0
MIDDLE_BUTTON = 1
RIGHT_BUTTON = 2
# Constants regarding components
TRACKBAR_HIDE_SEGMENT_LABELS = 1
TRACKBAR_HIDE_STEP_SCALE = 2
TRACKBAR_DISCRETE = 4
TRACKBAR_HIDE_MIN_MAX_LABELS = 8
TRACKBAR_HIDE_VALUE_LABEL = 16
TRACKBAR_HIDE_LABELS = 32
# Internal things
_IS_PY2 = sys.version_info.major == 2
CVUI_ANTIALISED = cv2.LINE_AA
CVUI_FILLED = -1
# Represent a 2D point.
class Point:
def __init__(self, theX = 0, theY = 0):
self.x = theX
self.y = theY
def inside(self, theRect):
return theRect.contains(self)
# Represent a rectangle.
class Rect:
def __init__(self, theX = 0, theY = 0, theWidth = 0, theHeight = 0):
self.x = theX
self.y = theY
self.width = theWidth
self.height = theHeight
def contains(self, thePoint):
return thePoint.x >= self.x and thePoint.x <= (self.x + self.width) and thePoint.y >= self.y and thePoint.y <= (self.y + self.height)
def area(self):
return self.width * self.height
# Represent the size of something, i.e. width and height.
# It is essentially a simplified version of Rect where x and y are zero.
class Size(Rect):
def __init__(self, theWidth = 0, theHeight = 0):
self.x = 0
self.y = 0
self.width = theWidth
self.height = theHeight
# Describe a block structure used by cvui to handle `begin*()` and `end*()` calls.
class Block:
def __init__(self):
self.where = None # where the block should be rendered to.
self.rect = Rect() # the size and position of the block.
self.fill = Rect() # the filled area occuppied by the block as it gets modified by its inner components.
self.anchor = Point() # the point where the next component of the block should be rendered.
self.padding = 0 # padding among components within this block.
self.type = ROW # type of the block, e.g. ROW or COLUMN.
self.reset()
def reset(self):
self.rect.x = 0
self.rect.y = 0
self.rect.width = 0
self.rect.height = 0
self.fill = self.rect
self.fill.width = 0
self.fill.height = 0
self.anchor.x = 0
self.anchor.y = 0
self.padding = 0
# Describe a component label, including info about a shortcut.
# If a label contains "Re&start", then:
# - hasShortcut will be true
# - shortcut will be 's'
# - textBeforeShortcut will be "Re"
# - textAfterShortcut will be "tart"
class Label:
def __init__(self):
self.hasShortcut = False
self.shortcut = ''
self.textBeforeShortcut = ''
self.textAfterShortcut = ''
# Describe a mouse button
class MouseButton:
def __init__(self):
self.justReleased = False # if the mouse button was released, i.e. click event.
self.justPressed = False # if the mouse button was just pressed, i.e. true for a frame when a button is down.
self.pressed = False # if the mouse button is pressed or not.
def reset(self):
self.justPressed = False
self.justReleased = False
self.pressed = False
# Describe the information of the mouse cursor
class Mouse:
def __init__(self):
self.buttons = { # status of each button. Use cvui.{RIGHT,LEFT,MIDDLE}_BUTTON to access the buttons.
LEFT_BUTTON: MouseButton(),
MIDDLE_BUTTON: MouseButton(),
RIGHT_BUTTON: MouseButton()
}
self.anyButton = MouseButton() # represent the behavior of all mouse buttons combined
self.position = Point(0, 0) # x and y coordinates of the mouse at the moment.
# Describe a (window) context.
class Context:
def __init__(self):
self.windowName = '' # name of the window related to this context.
self.mouse = Mouse() # the mouse cursor related to this context.
# Describe the inner parts of the trackbar component.
class TrackbarParams:
def __init__(self, theMin = 0., theMax = 25., theStep = 1., theSegments = 0, theLabelFormat = '%.0Lf', theOptions = 0):
self.min = theMin
self.max = theMax
self.step = theStep
self.segments = theSegments
self.options = theOptions
self.labelFormat = theLabelFormat
# This class contains all stuff that cvui uses internally to render
# and control interaction with components.
class Internal:
def __init__(self):
self.defaultContext = ''
self.currentContext = ''
self.contexts = {} # indexed by the window name.
self.buffer = []
self.lastKeyPressed = -1 # TODO: collect it per window
self.delayWaitKey = -1
self.screen = Block()
self.stack = [Block() for i in range(100)] # TODO: make it dynamic
self.stackCount = -1
self.trackbarMarginX = 14
self._render = Render()
self._render._internal = self
def isMouseButton(self, theButton, theQuery):
aRet = False
if theQuery == CLICK or theQuery == UP:
aRet = theButton.justReleased
elif theQuery == DOWN:
aRet = theButton.justPressed
elif theQuery == IS_DOWN:
aRet = theButton.pressed
return aRet
def mouseW(self, theWindowName = ''):
"""
Return the last position of the mouse.
\param theWindowName name of the window whose mouse cursor will be used. If nothing is informed (default), the function will return the position of the mouse cursor for the default window (the one informed in `cvui::init()`).
\return a point containing the position of the mouse cursor in the speficied window.
"""
return self.getContext(theWindowName).mouse.position
def mouseQ(self, theQuery):
"""
Query the mouse for events, e.g. "is any button down now?". Available queries are:
* `cvui::DOWN`: any mouse button was pressed. `cvui::mouse()` returns `true` for a single frame only.
* `cvui::UP`: any mouse button was released. `cvui::mouse()` returns `true` for a single frame only.
* `cvui::CLICK`: any mouse button was clicked (went down then up, no matter the amount of frames in between). `cvui::mouse()` returns `true` for a single frame only.
* `cvui::IS_DOWN`: any mouse button is currently pressed. `cvui::mouse()` returns `true` for as long as the button is down/pressed.
It is easier to think of this function as the answer to a questions. For instance, asking if any mouse button went down:
```
if (cvui::mouse(cvui::DOWN)) {
// Any mouse button just went down.
}
```
The window whose mouse will be queried depends on the context. If `cvui::mouse(query)` is being called after
`cvui::context()`, the window informed in the context will be queried. If no context is available, the default
window (informed in `cvui::init()`) will be used.
Parameters
----------
theQuery: int
Integer describing the intended mouse query. Available queries are `cvui::DOWN`, `cvui::UP`, `cvui::CLICK`, and `cvui::IS_DOWN`.
\sa mouse(const cv::String&)
\sa mouse(const cv::String&, int)
\sa mouse(const cv::String&, int, int)
\sa mouse(int, int)
"""
return self.mouseWQ('', theQuery)
def mouseWQ(self, theWindowName, theQuery):
"""
Query the mouse for events in a particular window. This function behave exactly like `cvui::mouse(int theQuery)`
with the difference that queries are targeted at a particular window.
\param theWindowName name of the window that will be queried.
\param theQuery an integer describing the intended mouse query. Available queries are `cvui::DOWN`, `cvui::UP`, `cvui::CLICK`, and `cvui::IS_DOWN`.
\sa mouse(const cv::String&)
\sa mouse(const cv::String&, int, int)
\sa mouse(int, int)
\sa mouse(int)
"""
aButton = self.getContext(theWindowName).mouse.anyButton
aRet = self.isMouseButton(aButton, theQuery)
return aRet
def mouseBQ(self, theButton, theQuery):
"""
Query the mouse for events in a particular button. This function behave exactly like `cvui::mouse(int theQuery)`,
with the difference that queries are targeted at a particular mouse button instead.
\param theButton an integer describing the mouse button to be queried. Possible values are `cvui::LEFT_BUTTON`, `cvui::MIDDLE_BUTTON` and `cvui::LEFT_BUTTON`.
\param theQuery an integer describing the intended mouse query. Available queries are `cvui::DOWN`, `cvui::UP`, `cvui::CLICK`, and `cvui::IS_DOWN`.
\sa mouse(const cv::String&)
\sa mouse(const cv::String&, int, int)
\sa mouse(int)
"""
return self.mouseWBQ('', theButton, theQuery)
def mouseWBQ(self, theWindowName, theButton, theQuery):
"""
Query the mouse for events in a particular button in a particular window. This function behave exactly
like `cvui::mouse(int theButton, int theQuery)`, with the difference that queries are targeted at
a particular mouse button in a particular window instead.
\param theWindowName name of the window that will be queried.
\param theButton an integer describing the mouse button to be queried. Possible values are `cvui::LEFT_BUTTON`, `cvui::MIDDLE_BUTTON` and `cvui::LEFT_BUTTON`.
\param theQuery an integer describing the intended mouse query. Available queries are `cvui::DOWN`, `cvui::UP`, `cvui::CLICK`, and `cvui::IS_DOWN`.
"""
if theButton != RIGHT_BUTTON and theButton != MIDDLE_BUTTON and theButton != LEFT_BUTTON:
__internal.error(6, 'Invalid mouse button. Are you using one of the available: cvui.{RIGHT,MIDDLE,LEFT}_BUTTON ?')
aButton = self.getContext(theWindowName).mouse.buttons[theButton]
aRet = self.isMouseButton(aButton, theQuery)
return aRet
def init(self, theWindowName, theDelayWaitKey):
self.defaultContext = theWindowName
self.currentContext = theWindowName
self.delayWaitKey = theDelayWaitKey
self.lastKeyPressed = -1
def bitsetHas(self, theBitset, theValue):
return (theBitset & theValue) != 0
def error(self, theId, theMessage):
print('[CVUI] Fatal error (code ', theId, '): ', theMessage)
cv2.waitKey(100000)
sys.exit(-1)
def getContext(self, theWindowName = ''):
if len(theWindowName) != 0:
# Get context in particular
return self.contexts[theWindowName]
elif len(self.currentContext) != 0:
# No window provided, return currently active context.
return self.contexts[self.currentContext]
elif len(self.defaultContext) != 0:
# We have no active context, so let's use the default one.
return self.contexts[self.defaultContext]
else:
# Apparently we have no window at all! <o>
# This should not happen. Probably cvui::init() was never called.
self.error(5, 'Unable to read context. Did you forget to call cvui.init()?')
def updateLayoutFlow(self, theBlock, theSize):
if theBlock.type == ROW:
aValue = theSize.width + theBlock.padding
theBlock.anchor.x += aValue
theBlock.fill.width += aValue
theBlock.fill.height = max(theSize.height, theBlock.fill.height)
elif theBlock.type == COLUMN:
aValue = theSize.height + theBlock.padding
theBlock.anchor.y += aValue
theBlock.fill.height += aValue
theBlock.fill.width = max(theSize.width, theBlock.fill.width)
def blockStackEmpty(self):
return self.stackCount == -1
def topBlock(self):
if self.stackCount < 0:
self.error(3, 'You are using a function that should be enclosed by begin*() and end*(), but you probably forgot to call begin*().')
return self.stack[self.stackCount]
def pushBlock(self):
self.stackCount += 1
return self.stack[self.stackCount]
def popBlock(self):
# Check if there is anything to be popped out from the stack.
if self.stackCount < 0:
self.error(1, 'Mismatch in the number of begin*()/end*() calls. You are calling one more than the other.')
aIndex = self.stackCount
self.stackCount -= 1
return self.stack[aIndex]
def createLabel(self, theLabel):
i = 0
aBefore = ''
aAfter = ''
aLabel = Label()
aLabel.hasShortcut = False
aLabel.shortcut = 0
aLabel.textBeforeShortcut = ''
aLabel.textAfterShortcut = ''
while i < len(theLabel):
c = theLabel[i]
if c == '&' and i < len(theLabel) - 1:
aLabel.hasShortcut = True
aLabel.shortcut = theLabel[i + 1]
i += 1
elif aLabel.hasShortcut == False:
aBefore += c
else:
aAfter += c
i += 1
aLabel.textBeforeShortcut = aBefore
aLabel.textAfterShortcut = aAfter
return aLabel
def text(self, theBlock, theX, theY, theText, theFontScale, theColor, theUpdateLayout):
aSizeInfo, aBaseline = cv2.getTextSize(theText, cv2.FONT_HERSHEY_SIMPLEX, theFontScale, 1)
aTextSize = Size(aSizeInfo[0], aSizeInfo[1])
aPos = Point(theX, theY + aTextSize.height)
self._render.text(theBlock, theText, aPos, theFontScale, theColor)
if theUpdateLayout:
# Add an extra pixel to the height to overcome OpenCV font size problems.
aTextSize.height += 1
self.updateLayoutFlow(theBlock, aTextSize)
def counter(self, theBlock, theX, theY, theValue, theStep, theFormat):
aContentArea = Rect(theX + 22, theY, 48, 22)
if self.buttonWH(theBlock, theX, theY, 22, 22, '-', False):
theValue[0] -= theStep
aText = theFormat % theValue[0]
self._render.counter(theBlock, aContentArea, aText)
if self.buttonWH(theBlock, aContentArea.x + aContentArea.width, theY, 22, 22, "+", False):
theValue[0] += theStep
# Update the layout flow
aSize = Size(22 * 2 + aContentArea.width, aContentArea.height)
self.updateLayoutFlow(theBlock, aSize)
return theValue[0]
def checkbox(self, theBlock, theX, theY, theLabel, theState, theColor):
aMouse = self.getContext().mouse
aRect = Rect(theX, theY, 15, 15)
aSizeInfo, aBaseline = cv2.getTextSize(theLabel, cv2.FONT_HERSHEY_SIMPLEX, 0.4, 1)
aTextSize = Rect(0, 0, aSizeInfo[0], aSizeInfo[1])
aHitArea = Rect(theX, theY, aRect.width + aTextSize.width + 6, aRect.height)
aMouseIsOver = aHitArea.contains(aMouse.position)
if aMouseIsOver:
self._render.checkbox(theBlock, OVER, aRect)
if aMouse.anyButton.justReleased:
theState[0] = not theState[0]
else:
self._render.checkbox(theBlock, OUT, aRect)
self._render.checkboxLabel(theBlock, aRect, theLabel, aTextSize, theColor)
if theState[0]:
self._render.checkboxCheck(theBlock, aRect)
# Update the layout flow
aSize = Size(aHitArea.width, aHitArea.height)
self.updateLayoutFlow(theBlock, aSize)
return theState[0]
def clamp01(self, theValue):
theValue = 1. if theValue > 1. else theValue
theValue = 0. if theValue < 0. else theValue
return theValue
def trackbarForceValuesAsMultiplesOfSmallStep(self, theParams, theValue):
if self.bitsetHas(theParams.options, TRACKBAR_DISCRETE) and theParams.step != 0.:
k = float(theValue[0] - theParams.min) / theParams.step
k = round(k)
theValue[0] = theParams.min + theParams.step * k
def trackbarXPixelToValue(self, theParams, theBounding, thePixelX):
aRatio = float(thePixelX - (theBounding.x + self.trackbarMarginX)) / (theBounding.width - 2 * self.trackbarMarginX)
aRatio = self.clamp01(aRatio)
aValue = theParams.min + aRatio * (theParams.max - theParams.min)
return aValue
def trackbarValueToXPixel(self, theParams, theBounding, theValue):
aRatio = float(theValue - theParams.min) / (theParams.max - theParams.min)
aRatio = self.clamp01(aRatio)
aPixelsX = theBounding.x + self.trackbarMarginX + aRatio * (theBounding.width - 2 * self.trackbarMarginX)
return int(aPixelsX)
def iarea(self, theX, theY, theWidth, theHeight):
aMouse = self.getContext().mouse
# By default, return that the mouse is out of the interaction area.
aRet = OUT
# Check if the mouse is over the interaction area.
aMouseIsOver = Rect(theX, theY, theWidth, theHeight).contains(aMouse.position)
if aMouseIsOver:
if aMouse.anyButton.pressed:
aRet = DOWN
else:
aRet = OVER
# Tell if the button was clicked or not
if aMouseIsOver and aMouse.anyButton.justReleased:
aRet = CLICK
return aRet
def buttonWH(self, theBlock, theX, theY, theWidth, theHeight, theLabel, theUpdateLayout):
# Calculate the space that the label will fill
aSizeInfo, aBaseline = cv2.getTextSize(theLabel, cv2.FONT_HERSHEY_SIMPLEX, 0.4, 1)
aTextSize = Rect(0, 0, aSizeInfo[0], aSizeInfo[1])
# Make the button big enough to house the label
aRect = Rect(theX, theY, theWidth, theHeight)
# Render the button according to mouse interaction, e.g. OVER, DOWN, OUT.
aStatus = self.iarea(theX, theY, aRect.width, aRect.height)
self._render.button(theBlock, aStatus, aRect, theLabel)
self._render.buttonLabel(theBlock, aStatus, aRect, theLabel, aTextSize)
# Update the layout flow according to button size
# if we were told to update.
if theUpdateLayout:
aSize = Size(theWidth, theHeight)
self.updateLayoutFlow(theBlock, aSize)
aWasShortcutPressed = False
# Handle keyboard shortcuts
if self.lastKeyPressed != -1:
aLabel = self.createLabel(theLabel)
if aLabel.hasShortcut and aLabel.shortcut.lower() == chr(self.lastKeyPressed).lower():
aWasShortcutPressed = True
# Return true if the button was clicked
return aStatus == CLICK or aWasShortcutPressed
def button(self, theBlock, theX, theY, theLabel):
# Calculate the space that the label will fill
aSizeInfo, aBaseline = cv2.getTextSize(theLabel, cv2.FONT_HERSHEY_SIMPLEX, 0.4, 1)
aTextSize = Rect(0, 0, aSizeInfo[0], aSizeInfo[1])
# Create a button based on the size of the text
return self.buttonWH(theBlock, theX, theY, aTextSize.width + 30, aTextSize.height + 18, theLabel, True)
def buttonI(self, theBlock, theX, theY, theIdle, theOver, theDown, theUpdateLayout):
aIdleRows = theIdle.shape[0]
aIdleCols = theIdle.shape[1]
aRect = Rect(theX, theY, aIdleCols, aIdleRows)
aStatus = self.iarea(theX, theY, aRect.width, aRect.height)
if aStatus == OUT: self._render.image(theBlock, aRect, theIdle)
elif aStatus == OVER: self._render.image(theBlock, aRect, theOver)
elif aStatus == DOWN: self._render.image(theBlock, aRect, theDown)
# Update the layout flow according to button size
# if we were told to update.
if theUpdateLayout:
aSize = Size(aRect.width, aRect.height)
self.updateLayoutFlow(theBlock, aSize)
# Return true if the button was clicked
return aStatus == CLICK
def image(self, theBlock, theX, theY, theImage):
aImageRows = theImage.shape[0]
aImageCols = theImage.shape[1]
aRect = Rect(theX, theY, aImageCols, aImageRows)
# TODO: check for render outside the frame area
self._render.image(theBlock, aRect, theImage)
# Update the layout flow according to image size
aSize = Size(aImageCols, aImageRows)
self.updateLayoutFlow(theBlock, aSize)
def trackbar(self, theBlock, theX, theY, theWidth, theValue, theParams):
aMouse = self.getContext().mouse
aContentArea = Rect(theX, theY, theWidth, 45)
aMouseIsOver = aContentArea.contains(aMouse.position)
aValue = theValue[0]
self._render.trackbar(theBlock, OVER if aMouseIsOver else OUT, aContentArea, theValue[0], theParams)
if aMouse.anyButton.pressed and aMouseIsOver:
theValue[0] = self.trackbarXPixelToValue(theParams, aContentArea, aMouse.position.x)
if self.bitsetHas(theParams.options, TRACKBAR_DISCRETE):
self.trackbarForceValuesAsMultiplesOfSmallStep(theParams, theValue)
# Update the layout flow
# TODO: use aSize = aContentArea.size()?
self.updateLayoutFlow(theBlock, aContentArea)
return theValue[0] != aValue
def window(self, theBlock, theX, theY, theWidth, theHeight, theTitle):
aTitleBar = Rect(theX, theY, theWidth, 20)
aContent = Rect(theX, theY + aTitleBar.height, theWidth, theHeight - aTitleBar.height)
self._render.window(theBlock, aTitleBar, aContent, theTitle)
# Update the layout flow
aSize = Size(theWidth, theHeight)
self.updateLayoutFlow(theBlock, aSize)
def rect(self, theBlock, theX, theY, theWidth, theHeight, theBorderColor, theFillingColor):
aAnchor = Point(theX, theY);
aRect = Rect(theX, theY, theWidth, theHeight);
aRect.x = aAnchor.x + aRect.width if aRect.width < 0 else aAnchor.x
aRect.y = aAnchor.y + aRect.height if aRect.height < 0 else aAnchor.y
aRect.width = abs(aRect.width)
aRect.height = abs(aRect.height)
self._render.rect(theBlock, aRect, theBorderColor, theFillingColor)
# Update the layout flow
aSize = Size(aRect.width, aRect.height)
self.updateLayoutFlow(theBlock, aSize)
def sparkline(self, theBlock, theValues, theX, theY, theWidth, theHeight, theColor):
aRect = Rect(theX, theY, theWidth, theHeight)
aHowManyValues = len(theValues)
if (aHowManyValues >= 2):
aMin,aMax = self.findMinMax(theValues)
self._render.sparkline(theBlock, theValues, aRect, aMin, aMax, theColor)
else:
self.text(theBlock, theX, theY, 'No data.' if aHowManyValues == 0 else 'Insufficient data points.', 0.4, 0xCECECE, False)
# Update the layout flow
aSize = Size(theWidth, theHeight)
self.updateLayoutFlow(theBlock, aSize)
def hexToScalar(self, theColor):
aAlpha = (theColor >> 24) & 0xff
aRed = (theColor >> 16) & 0xff
aGreen = (theColor >> 8) & 0xff
aBlue = theColor & 0xff
return (aBlue, aGreen, aRed, aAlpha)
def isString(self, theObj):
return isinstance(theObj, basestring if _IS_PY2 else str)
def begin(self, theType, theWhere, theX, theY, theWidth, theHeight, thePadding):
aBlock = self.pushBlock()
aBlock.where = theWhere
aBlock.rect.x = theX
aBlock.rect.y = theY
aBlock.rect.width = theWidth
aBlock.rect.height = theHeight
aBlock.fill = aBlock.rect
aBlock.fill.width = 0
aBlock.fill.height = 0
aBlock.anchor.x = theX
aBlock.anchor.y = theY
aBlock.padding = thePadding
aBlock.type = theType
def end(self, theType):
aBlock = self.popBlock()
if aBlock.type != theType:
self.error(4, 'Calling wrong type of end*(). E.g. endColumn() instead of endRow(). Check if your begin*() calls are matched with their appropriate end*() calls.')
# If we still have blocks in the stack, we must update
# the current top with the dimensions that were filled by
# the newly popped block.
if self.blockStackEmpty() == False:
aTop = self.topBlock()
aSize = Size()
# If the block has rect.width < 0 or rect.heigth < 0, it means the
# user don't want to calculate the block's width/height. It's up to
# us do to the math. In that case, we use the block's fill rect to find
# out the occupied space. If the block's width/height is greater than
# zero, then the user is very specific about the desired size. In that
# case, we use the provided width/height, no matter what the fill rect
# actually is.
aSize.width = aBlock.fill.width if aBlock.rect.width < 0 else aBlock.rect.width
aSize.height = aBlock.fill.height if aBlock.rect.height < 0 else aBlock.rect.height
self.updateLayoutFlow(aTop, aSize)
# Find the min and max values of a vector
def findMinMax(self, theValues):
aMin = theValues[0]
aMax = theValues[0]
for aValue in theValues:
if aValue < aMin:
aMin = aValue
if aValue > aMax:
aMax = aValue
return (aMin, aMax)
# Class that contains all rendering methods.
class Render:
_internal = None
def rectangle(self, theWhere, theShape, theColor, theThickness = 1, theLineType = CVUI_ANTIALISED):
aStartPoint = (int(theShape.x), int(theShape.y))
aEndPoint = (int(theShape.x + theShape.width), int(theShape.y + theShape.height))
cv2.rectangle(theWhere, aStartPoint, aEndPoint, theColor, theThickness, theLineType)
def text(self, theBlock, theText, thePos, theFontScale, theColor):
aPosition = (int(thePos.x), int(thePos.y))
cv2.putText(theBlock.where, theText, aPosition, cv2.FONT_HERSHEY_SIMPLEX, theFontScale, self._internal.hexToScalar(theColor), 1, cv2.LINE_AA)
def counter(self, theBlock, theShape, theValue):
self.rectangle(theBlock.where, theShape, (0x29, 0x29, 0x29), CVUI_FILLED) # fill
self.rectangle(theBlock.where, theShape, (0x45, 0x45, 0x45)) # border
aSizeInfo, aBaseline = cv2.getTextSize(theValue, cv2.FONT_HERSHEY_SIMPLEX, 0.4, 1)
aTextSize = Rect(0, 0, aSizeInfo[0], aSizeInfo[1])
aPos = Point(theShape.x + theShape.width / 2 - aTextSize.width / 2, theShape.y + aTextSize.height / 2 + theShape.height / 2)
cv2.putText(theBlock.where, theValue, (int(aPos.x), int(aPos.y)), cv2.FONT_HERSHEY_SIMPLEX, 0.4, (0xCE, 0xCE, 0xCE), 1, CVUI_ANTIALISED)
def button(self, theBlock, theState, theShape, theLabel):
# Outline
self.rectangle(theBlock.where, theShape, (0x29, 0x29, 0x29))
# Border
theShape.x += 1
theShape.y +=1
theShape.width -= 2
theShape.height -= 2
self.rectangle(theBlock.where, theShape, (0x4A, 0x4A, 0x4A))
# Inside
theShape.x += 1
theShape.y +=1
theShape.width -= 2
theShape.height -= 2
self.rectangle(theBlock.where, theShape, (0x42, 0x42, 0x42) if theState == OUT else ((0x52, 0x52, 0x52) if theState == OVER else (0x32, 0x32, 0x32)), CVUI_FILLED)
def image(self, theBlock, theRect, theImage):
theBlock.where[theRect.y: theRect.y + theRect.height, theRect.x: theRect.x + theRect.width] = theImage
def putText(self, theBlock, theState, theColor, theText, thePosition):
aFontScale = 0.39 if theState == DOWN else 0.4
aTextSize = Rect()
if theText != '':
aPosition = (int(thePosition.x), int(thePosition.y))
cv2.putText(theBlock.where, theText, aPosition, cv2.FONT_HERSHEY_SIMPLEX, aFontScale, theColor, 1, CVUI_ANTIALISED)
aSizeInfo, aBaseline = cv2.getTextSize(theText, cv2.FONT_HERSHEY_SIMPLEX, aFontScale, 1)
aTextSize = Rect(0, 0, aSizeInfo[0], aSizeInfo[1])
return aTextSize.width
def putTextCentered(self, theBlock, thePosition, theText):
aFontScale = 0.3
aSizeInfo, aBaseline = cv2.getTextSize(theText, cv2.FONT_HERSHEY_SIMPLEX, aFontScale, 1)
aTextSize = Rect(0, 0, aSizeInfo[0], aSizeInfo[1])
aPositionDecentered = Point(thePosition.x - aTextSize.width / 2, thePosition.y)
cv2.putText(theBlock.where, theText, (int(aPositionDecentered.x), int(aPositionDecentered.y)), cv2.FONT_HERSHEY_SIMPLEX, aFontScale, (0xCE, 0xCE, 0xCE), 1, CVUI_ANTIALISED)
return aTextSize.width
def buttonLabel(self, theBlock, theState, theRect, theLabel, theTextSize):
aPos = Point(theRect.x + theRect.width / 2 - theTextSize.width / 2, theRect.y + theRect.height / 2 + theTextSize.height / 2)
aColor = (0xCE, 0xCE, 0xCE)
aLabel = self._internal.createLabel(theLabel)
if aLabel.hasShortcut == False:
self.putText(theBlock, theState, aColor, theLabel, aPos);
else:
aWidth = self.putText(theBlock, theState, aColor, aLabel.textBeforeShortcut, aPos)
aStart = aPos.x + aWidth
aPos.x += aWidth
aShortcut = ''
aShortcut += aLabel.shortcut
aWidth = self.putText(theBlock, theState, aColor, aShortcut, aPos)
aEnd = aStart + aWidth
aPos.x += aWidth
self.putText(theBlock, theState, aColor, aLabel.textAfterShortcut, aPos)
cv2.line(theBlock.where, (int(aStart), int(aPos.y + 3)), (int(aEnd), int(aPos.y + 3)), aColor, 1, CVUI_ANTIALISED)
def trackbarHandle(self, theBlock, theState, theShape, theValue, theParams, theWorkingArea):
aBarTopLeft = Point(theWorkingArea.x, theWorkingArea.y + theWorkingArea.height / 2)
aBarHeight = 7
# Draw the rectangle representing the handle
aPixelX = self._internal.trackbarValueToXPixel(theParams, theShape, theValue)
aIndicatorWidth = 3
aIndicatorHeight = 4
aPoint1 = Point(aPixelX - aIndicatorWidth, aBarTopLeft.y - aIndicatorHeight)
aPoint2 = Point(aPixelX + aIndicatorWidth, aBarTopLeft.y + aBarHeight + aIndicatorHeight)
aRect = Rect(aPoint1.x, aPoint1.y, aPoint2.x - aPoint1.x, aPoint2.y - aPoint1.y)
aFillColor = 0x525252 if theState == OVER else 0x424242
self.rect(theBlock, aRect, 0x212121, 0x212121)
aRect.x += 1
aRect.y += 1
aRect.width -= 2
aRect.height -= 2
self.rect(theBlock, aRect, 0x515151, aFillColor)
aShowLabel = self._internal.bitsetHas(theParams.options, TRACKBAR_HIDE_VALUE_LABEL) == False
# Draw the handle label
if aShowLabel:
aTextPos = Point(aPixelX, aPoint2.y + 11)
aText = theParams.labelFormat % theValue
self.putTextCentered(theBlock, aTextPos, aText)
def trackbarPath(self, theBlock, theState, theShape, theValue, theParams, theWorkingArea):
aBarHeight = 7
aBarTopLeft = Point(theWorkingArea.x, theWorkingArea.y + theWorkingArea.height / 2)
aRect = Rect(aBarTopLeft.x, aBarTopLeft.y, theWorkingArea.width, aBarHeight)
aBorderColor = 0x4e4e4e if theState == OVER else 0x3e3e3e
self.rect(theBlock, aRect, aBorderColor, 0x292929)
cv2.line(theBlock.where, (int(aRect.x + 1), int(aRect.y + aBarHeight - 2)), (int(aRect.x + aRect.width - 2), int(aRect.y + aBarHeight - 2)), (0x0e, 0x0e, 0x0e))
def trackbarSteps(self, theBlock, theState, theShape, theValue, theParams, theWorkingArea):
aBarTopLeft = Point(theWorkingArea.x, theWorkingArea.y + theWorkingArea.height / 2)
aColor = (0x51, 0x51, 0x51)
aDiscrete = self._internal.bitsetHas(theParams.options, TRACKBAR_DISCRETE)
aFixedStep = theParams.step if aDiscrete else (theParams.max - theParams.min) / 20
# TODO: check min, max and step to prevent infinite loop.
aValue = theParams.min
while aValue <= theParams.max:
aPixelX = int(self._internal.trackbarValueToXPixel(theParams, theShape, aValue))
aPoint1 = (aPixelX, int(aBarTopLeft.y))
aPoint2 = (aPixelX, int(aBarTopLeft.y - 3))
cv2.line(theBlock.where, aPoint1, aPoint2, aColor)
aValue += aFixedStep
def trackbarSegmentLabel(self, theBlock, theShape, theParams, theValue, theWorkingArea, theShowLabel):
aColor = (0x51, 0x51, 0x51)
aBarTopLeft = Point(theWorkingArea.x, theWorkingArea.y + theWorkingArea.height / 2)
aPixelX = int(self._internal.trackbarValueToXPixel(theParams, theShape, theValue))
aPoint1 = (aPixelX, int(aBarTopLeft.y))
aPoint2 = (aPixelX, int(aBarTopLeft.y - 8))
cv2.line(theBlock.where, aPoint1, aPoint2, aColor)
if theShowLabel:
aText = theParams.labelFormat % theValue
aTextPos = Point(aPixelX, aBarTopLeft.y - 11)
self.putTextCentered(theBlock, aTextPos, aText)
def trackbarSegments(self, theBlock, theState, theShape, theValue, theParams, theWorkingArea):
aSegments = 1 if theParams.segments < 1 else theParams.segments
aSegmentLength = float(theParams.max - theParams.min) / aSegments
aHasMinMaxLabels = self._internal.bitsetHas(theParams.options, TRACKBAR_HIDE_MIN_MAX_LABELS) == False
# Render the min value label
self.trackbarSegmentLabel(theBlock, theShape, theParams, theParams.min, theWorkingArea, aHasMinMaxLabels)
# Draw large steps and labels
aHasSegmentLabels = self._internal.bitsetHas(theParams.options, TRACKBAR_HIDE_SEGMENT_LABELS) == False
# TODO: check min, max and step to prevent infinite loop.
aValue = theParams.min
while aValue <= theParams.max:
self.trackbarSegmentLabel(theBlock, theShape, theParams, aValue, theWorkingArea, aHasSegmentLabels)
aValue += aSegmentLength
# Render the max value label
self.trackbarSegmentLabel(theBlock, theShape, theParams, theParams.max, theWorkingArea, aHasMinMaxLabels)
def trackbar(self, theBlock, theState, theShape, theValue, theParams):
aWorkingArea = Rect(theShape.x + self._internal.trackbarMarginX, theShape.y, theShape.width - 2 * self._internal.trackbarMarginX, theShape.height)
self.trackbarPath(theBlock, theState, theShape, theValue, theParams, aWorkingArea)
aHideAllLabels = self._internal.bitsetHas(theParams.options, TRACKBAR_HIDE_LABELS)
aShowSteps = self._internal.bitsetHas(theParams.options, TRACKBAR_HIDE_STEP_SCALE) == False
if aShowSteps and aHideAllLabels == False:
self.trackbarSteps(theBlock, theState, theShape, theValue, theParams, aWorkingArea)
if aHideAllLabels == False:
self.trackbarSegments(theBlock, theState, theShape, theValue, theParams, aWorkingArea)
self.trackbarHandle(theBlock, theState, theShape, theValue, theParams, aWorkingArea)
def checkbox(self, theBlock, theState, theShape):
# Outline
self.rectangle(theBlock.where, theShape, (0x63, 0x63, 0x63) if theState == OUT else (0x80, 0x80, 0x80))
# Border
theShape.x += 1
theShape.y+=1
theShape.width -= 2
theShape.height -= 2
self.rectangle(theBlock.where, theShape, (0x17, 0x17, 0x17))
# Inside
theShape.x += 1
theShape.y += 1
theShape.width -= 2
theShape.height -= 2
self.rectangle(theBlock.where, theShape, (0x29, 0x29, 0x29), CVUI_FILLED)
def checkboxLabel(self, theBlock, theRect, theLabel, theTextSize, theColor):
aPos = Point(theRect.x + theRect.width + 6, theRect.y + theTextSize.height + theRect.height / 2 - theTextSize.height / 2 - 1)
self.text(theBlock, theLabel, aPos, 0.4, theColor)
def checkboxCheck(self, theBlock, theShape):
theShape.x += 1
theShape.y += 1
theShape.width -= 2
theShape.height -= 2
self.rectangle(theBlock.where, theShape, (0xFF, 0xBF, 0x75), CVUI_FILLED)
def window(self, theBlock, theTitleBar, theContent, theTitle):
aTransparecy = False
aAlpha = 0.3
aOverlay = theBlock.where.copy()
# Render borders in the title bar
self.rectangle(theBlock.where, theTitleBar, (0x4A, 0x4A, 0x4A));
# Render the inside of the title bar
theTitleBar.x += 1
theTitleBar.y += 1
theTitleBar.width -= 2
theTitleBar.height -= 2
self.rectangle(theBlock.where, theTitleBar, (0x21, 0x21, 0x21), CVUI_FILLED);
# Render title text.
aPos = Point(theTitleBar.x + 5, theTitleBar.y + 12)
cv2.putText(theBlock.where, theTitle, (int(aPos.x), int(aPos.y)), cv2.FONT_HERSHEY_SIMPLEX, 0.4, (0xCE, 0xCE, 0xCE), 1, CVUI_ANTIALISED)
# Render borders of the body
self.rectangle(theBlock.where, theContent, (0x4A, 0x4A, 0x4A))
# Render the body filling.
theContent.x += 1
theContent.y += 1
theContent.width -= 2
theContent.height -= 2
self.rectangle(aOverlay, theContent, (0x31, 0x31, 0x31), CVUI_FILLED)
if aTransparecy:
np.copyto(aOverlay, theBlock.where) # theBlock.where.copyTo(aOverlay);
self.rectangle(aOverlay, theContent, (0x31, 0x31, 0x31), CVUI_FILLED)
cv2.addWeighted(aOverlay, aAlpha, theBlock.where, 1.0 - aAlpha, 0.0, theBlock.where)
else:
self.rectangle(theBlock.where, theContent, (0x31, 0x31, 0x31), CVUI_FILLED)
def rect(self, theBlock, thePos, theBorderColor, theFillingColor):
aBorderColor = self._internal.hexToScalar(theBorderColor)
aFillingColor = self._internal.hexToScalar(theFillingColor)
aHasFilling = aFillingColor[3] != 0xff
if aHasFilling:
self.rectangle(theBlock.where, thePos, aFillingColor, CVUI_FILLED, CVUI_ANTIALISED)
# Render the border
self.rectangle(theBlock.where, thePos, aBorderColor)
def sparkline(self, theBlock, theValues, theRect, theMin, theMax, theColor):
aSize = len(theValues)
i = 0
delta = theMax - theMin
aScale = 1 if delta == 0 else delta
aGap = float(theRect.width) / aSize
aPosX = theRect.x
while i <= aSize - 2:
x = aPosX;