/usr/lib/python3/dist-packages/qwt/painter.py is in python3-qwt 0.5.5-1.
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#
# Licensed under the terms of the Qwt License
# Copyright (c) 2002 Uwe Rathmann, for the original C++ code
# Copyright (c) 2015 Pierre Raybaut, for the Python translation/optimization
# (see LICENSE file for more details)
"""
QwtPainterClass
---------------
.. autoclass:: QwtPainterClass
:members:
"""
from qwt.color_map import QwtColorMap
from qwt.scale_map import QwtScaleMap
from qwt.qt.QtGui import (QPaintEngine, QFrame, QPixmap, QPainter, QPalette,
QStyle, QPen, QStyleOptionFocusRect, QBrush,
QLinearGradient, QPainterPath, QColor, QStyleOption)
from qwt.qt.QtCore import Qt, QRect, QPoint, QT_VERSION
QWIDGETSIZE_MAX = (1<<24)-1
def isX11GraphicsSystem():
pm = QPixmap(1, 1)
painter = QPainter(pm)
isX11 = painter.paintEngine().type() == QPaintEngine.X11
del painter
return isX11
def qwtFillRect(widget, painter, rect, brush):
if brush.style() == Qt.TexturePattern:
painter.save()
painter.setClipRect(rect)
painter.drawTiledPixmap(rect, brush.texture(), rect.topLeft())
painter.restore()
elif brush.gradient():
painter.save()
painter.setClipRect(rect)
painter.fillRect(0, 0, widget.width(), widget.height(), brush)
painter.restore()
else:
painter.fillRect(rect, brush)
class QwtPainterClass(object):
"""A collection of `QPainter` workarounds"""
def drawImage(self, painter, rect, image):
alignedRect = rect.toAlignedRect()
if alignedRect != rect:
clipRect = rect.adjusted(0., 0., -1., -1.)
painter.save()
painter.setClipRect(clipRect, Qt.IntersectClip)
painter.drawImage(alignedRect, image)
painter.restore()
else:
painter.drawImage(alignedRect, image)
def drawPixmap(self, painter, rect, pixmap):
alignedRect = rect.toAlignedRect()
if alignedRect != rect:
clipRect = rect.adjusted(0., 0., -1., -1.)
painter.save()
painter.setClipRect(clipRect, Qt.IntersectClip)
painter.drawPixmap(alignedRect, pixmap)
painter.restore()
else:
painter.drawPixmap(alignedRect, pixmap)
def drawFocusRect(self, *args):
if len(args) == 2:
painter, widget = args
self.drawFocusRect(painter, widget, widget.rect())
elif len(args) == 3:
painter, widget, rect = args
opt = QStyleOptionFocusRect()
opt.initFrom(widget)
opt.rect = rect
opt.state |= QStyle.State_HasFocus
widget.style().drawPrimitive(QStyle.PE_FrameFocusRect,
opt, painter, widget)
else:
raise TypeError("QwtPainter.drawFocusRect() takes 2 or 3 argument"\
"(s) (%s given)" % len(args))
def drawRoundFrame(self, painter, rect, palette, lineWidth, frameStyle):
"""
Draw a round frame
:param QPainter painter: Painter
:param QRectF rect: Target rectangle
:param QPalette palette: `QPalette.WindowText` is used for plain borders, `QPalette.Dark` and `QPalette.Light` for raised or sunken borders
:param int lineWidth: Line width
:param int frameStyle: bitwise OR´ed value of `QFrame.Shape` and `QFrame.Shadow`
"""
Plain, Sunken, Raised = list(range(3))
style = Plain
if (frameStyle & QFrame.Sunken) == QFrame.Sunken:
style = Sunken
elif (frameStyle & QFrame.Raised) == QFrame.Raised:
style = Raised
lw2 = .5*lineWidth
r = rect.adjusted(lw2, lw2, -lw2, -lw2)
if style != Plain:
c1 = palette.color(QPalette.Light)
c2 = palette.color(QPalette.Dark)
if style == Sunken:
c1, c2 = c2, c1
gradient = QLinearGradient(r.topLeft(), r.bottomRight())
gradient.setColorAt(0., c1)
gradient.setColorAt(1., c2)
brush = QBrush(gradient)
else:
brush = palette.brush(QPalette.WindowText)
painter.save()
painter.setPen(QPen(brush, lineWidth))
painter.drawEllipse(r)
painter.restore()
def drawFrame(self, painter, rect, palette, foregroundRole,
frameWidth, midLineWidth, frameStyle):
"""
Draw a rectangular frame
:param QPainter painter: Painter
:param QRectF rect: Frame rectangle
:param QPalette palette: Palette
:param QPalette.ColorRole foregroundRole: Palette
:param int frameWidth: Frame width
:param int midLineWidth: Used for `QFrame.Box`
:param int frameStyle: bitwise OR´ed value of `QFrame.Shape` and `QFrame.Shadow`
"""
if frameWidth <= 0 or rect.isEmpty():
return
shadow = frameStyle & QFrame.Shadow_Mask
painter.save()
if shadow == QFrame.Plain:
outerRect = rect.adjusted(0., 0., -1., -1.)
innerRect = outerRect.adjusted(
frameWidth, frameWidth, -frameWidth, -frameWidth)
path = QPainterPath()
path.addRect(outerRect)
path.addRect(innerRect)
painter.setPen(Qt.NoPen)
painter.setBrush(palette.color(foregroundRole))
painter.drawPath(path)
else:
shape = frameStyle & QFrame.Shape_Mask
if shape == QFrame.Box:
outerRect = rect.adjusted(0., 0., -1., -1.)
midRect1 = outerRect.adjusted(
frameWidth, frameWidth, -frameWidth, -frameWidth)
midRect2 = midRect1.adjusted(
midLineWidth, midLineWidth, -midLineWidth, -midLineWidth)
innerRect = midRect2.adjusted(
frameWidth, frameWidth, -frameWidth, -frameWidth)
path1 = QPainterPath()
path1.moveTo(outerRect.bottomLeft())
path1.lineTo(outerRect.topLeft())
path1.lineTo(outerRect.topRight())
path1.lineTo(midRect1.topRight())
path1.lineTo(midRect1.topLeft())
path1.lineTo(midRect1.bottomLeft())
path2 = QPainterPath()
path2.moveTo(outerRect.bottomLeft())
path2.lineTo(outerRect.bottomRight())
path2.lineTo(outerRect.topRight())
path2.lineTo(midRect1.topRight())
path2.lineTo(midRect1.bottomRight())
path2.lineTo(midRect1.bottomLeft())
path3 = QPainterPath()
path3.moveTo(midRect2.bottomLeft())
path3.lineTo(midRect2.topLeft())
path3.lineTo(midRect2.topRight())
path3.lineTo(innerRect.topRight())
path3.lineTo(innerRect.topLeft())
path3.lineTo(innerRect.bottomLeft())
path4 = QPainterPath()
path4.moveTo(midRect2.bottomLeft())
path4.lineTo(midRect2.bottomRight())
path4.lineTo(midRect2.topRight())
path4.lineTo(innerRect.topRight())
path4.lineTo(innerRect.bottomRight())
path4.lineTo(innerRect.bottomLeft())
path5 = QPainterPath()
path5.addRect(midRect1)
path5.addRect(midRect2)
painter.setPen(Qt.NoPen)
brush1 = palette.dark().color()
brush2 = palette.light().color()
if shadow == QFrame.Raised:
brush1, brush2 = brush2, brush1
painter.setBrush(brush1)
painter.drawPath(path1)
painter.drawPath(path4)
painter.setBrush(brush2)
painter.drawPath(path2)
painter.drawPath(path3)
painter.setBrush(palette.mid())
painter.drawPath(path5)
else:
outerRect = rect.adjusted(0., 0., -1., -1.)
innerRect = outerRect.adjusted(frameWidth-1., frameWidth-1.,
-(frameWidth-1.), -(frameWidth-1.))
path1 = QPainterPath()
path1.moveTo(outerRect.bottomLeft())
path1.lineTo(outerRect.topLeft())
path1.lineTo(outerRect.topRight())
path1.lineTo(innerRect.topRight())
path1.lineTo(innerRect.topLeft())
path1.lineTo(innerRect.bottomLeft())
path2 = QPainterPath()
path2.moveTo(outerRect.bottomLeft())
path2.lineTo(outerRect.bottomRight())
path2.lineTo(outerRect.topRight())
path2.lineTo(innerRect.topRight())
path2.lineTo(innerRect.bottomRight())
path2.lineTo(innerRect.bottomLeft())
painter.setPen(Qt.NoPen)
brush1 = palette.dark().color()
brush2 = palette.light().color()
if shadow == QFrame.Raised:
brush1, brush2 = brush2, brush1
painter.setBrush(brush1)
painter.drawPath(path1)
painter.setBrush(brush2)
painter.drawPath(path2)
painter.restore()
def drawRoundedFrame(self, painter, rect, xRadius, yRadius,
palette, lineWidth, frameStyle):
"""
Draw a rectangular frame with rounded borders
:param QPainter painter: Painter
:param QRectF rect: Frame rectangle
:param float xRadius: x-radius of the ellipses defining the corners
:param float yRadius: y-radius of the ellipses defining the corners
:param QPalette palette: `QPalette.WindowText` is used for plain borders, `QPalette.Dark` and `QPalette.Light` for raised or sunken borders
:param int lineWidth: Line width
:param int frameStyle: bitwise OR´ed value of `QFrame.Shape` and `QFrame.Shadow`
"""
painter.save()
painter.setRenderHint(QPainter.Antialiasing, True)
painter.setBrush(Qt.NoBrush)
lw2 = lineWidth*.5
r = rect.adjusted(lw2, lw2, -lw2, -lw2)
path = QPainterPath()
path.addRoundedRect(r, xRadius, yRadius)
Plain, Sunken, Raised = list(range(3))
style = Plain
if (frameStyle & QFrame.Sunken) == QFrame.Sunken:
style = Sunken
if (frameStyle & QFrame.Raised) == QFrame.Raised:
style = Raised
if style != Plain and path.elementCount() == 17:
pathList = [QPainterPath() for _i in range(8)]
for i in range(4):
j = i*4+1
pathList[2*i].moveTo(path.elementAt(j-1).x,
path.elementAt(j-1).y)
pathList[2*i].cubicTo(
path.elementAt(j+0).x, path.elementAt(j+0).y,
path.elementAt(j+1).x, path.elementAt(j+1).y,
path.elementAt(j+2).x, path.elementAt(j+2).y)
pathList[2*i+1].moveTo(path.elementAt(j+2).x,
path.elementAt(j+2).y)
pathList[2*i+1].lineTo(path.elementAt(j+3).x,
path.elementAt(j+3).y)
c1 = QColor(palette.color(QPalette.Dark))
c2 = QColor(palette.color(QPalette.Light))
if style == Raised:
c1, c2 = c2, c1
for i in range(5):
r = pathList[2*i].controlPointRect()
arcPen = QPen()
arcPen.setCapStyle(Qt.FlatCap)
arcPen.setWidth(lineWidth)
linePen = QPen()
linePen.setCapStyle(Qt.FlatCap)
linePen.setWidth(lineWidth)
if i == 0:
arcPen.setColor(c1)
linePen.setColor(c1)
elif i == 1:
gradient = QLinearGradient()
gradient.setStart(r.topLeft())
gradient.setFinalStop(r.bottomRight())
gradient.setColorAt(0., c1)
gradient.setColorAt(1., c2)
arcPen.setBrush(gradient)
linePen.setColor(c2)
elif i == 2:
arcPen.setColor(c2)
linePen.setColor(c2)
elif i == 3:
gradient = QLinearGradient()
gradient.setStart(r.bottomRight())
gradient.setFinalStop(r.topLeft())
gradient.setColorAt(0., c2)
gradient.setColorAt(1., c1)
arcPen.setBrush(gradient)
linePen.setColor(c1)
painter.setPen(arcPen)
painter.drawPath(pathList[2*i])
painter.setPen(linePen)
painter.drawPath(pathList[2*i+1])
else:
pen = QPen(palette.color(QPalette.WindowText), lineWidth)
painter.setPen(pen)
painter.drawPath(path)
painter.restore()
def drawColorBar(self, painter, colorMap, interval, scaleMap,
orientation, rect):
"""
Draw a color bar into a rectangle
:param QPainter painter: Painter
:param qwt.color_map.QwtColorMap colorMap: Color map
:param qwt.interval.QwtInterval interval: Value range
:param qwt.scalemap.QwtScaleMap scaleMap: Scale map
:param Qt.Orientation orientation: Orientation
:param QRectF rect: Target rectangle
"""
colorTable = []
if colorMap.format() == QwtColorMap.Indexed:
colorTable = colorMap.colorTable(interval)
c = QColor()
devRect = rect.toAlignedRect()
pixmap = QPixmap(devRect.size())
pixmap.fill(Qt.transparent)
pmPainter = QPainter(pixmap)
pmPainter.translate(-devRect.x(), -devRect.y())
if orientation == Qt.Horizontal:
sMap = QwtScaleMap(scaleMap)
sMap.setPaintInterval(rect.left(), rect.right())
for x in range(devRect.left(), devRect.right()+1):
value = sMap.invTransform(x)
if colorMap.format() == QwtColorMap.RGB:
c.setRgba(colorMap.rgb(interval, value))
else:
c = colorTable[colorMap.colorIndex(interval, value)]
pmPainter.setPen(c)
pmPainter.drawLine(x, devRect.top(), x, devRect.bottom())
else:
sMap = QwtScaleMap(scaleMap)
sMap.setPaintInterval(rect.bottom(), rect.top())
for y in range(devRect.top(), devRect.bottom()+1):
value = sMap.invTransform(y)
if colorMap.format() == QwtColorMap.RGB:
c.setRgba(colorMap.rgb(interval, value))
else:
c = colorTable[colorMap.colorIndex(interval, value)]
pmPainter.setPen(c)
pmPainter.drawLine(devRect.left(), y, devRect.right(), y)
pmPainter.end()
self.drawPixmap(painter, rect, pixmap)
def fillPixmap(self, widget, pixmap, offset=None):
"""
Fill a pixmap with the content of a widget
In Qt >= 5.0 `QPixmap.fill()` is a nop, in Qt 4.x it is buggy
for backgrounds with gradients. Thus `fillPixmap()` offers
an alternative implementation.
:param QWidget widget: Widget
:param QPixmap pixmap: Pixmap to be filled
:param QPoint offset: Offset
.. seealso::
:py:meth:`QPixmap.fill()`
"""
if offset is None:
offset = QPoint()
rect = QRect(offset, pixmap.size())
painter = QPainter(pixmap)
painter.translate(-offset)
autoFillBrush = widget.palette().brush(widget.backgroundRole())
if not (widget.autoFillBackground() and autoFillBrush.isOpaque()):
bg = widget.palette().brush(QPalette.Window)
qwtFillRect(widget, painter, rect, bg)
if widget.autoFillBackground():
qwtFillRect(widget, painter, rect, autoFillBrush)
if widget.testAttribute(Qt.WA_StyledBackground):
painter.setClipRegion(rect)
opt = QStyleOption()
opt.initFrom(widget)
widget.style().drawPrimitive(QStyle.PE_Widget, opt,
painter, widget)
def drawBackground(self, painter, rect, widget):
"""
Fill rect with the background of a widget
:param QPainter painter: Painter
:param QRectF rect: Rectangle to be filled
:param QWidget widget: Widget
.. seealso::
:py:data:`QStyle.PE_Widget`, :py:meth:`QWidget.backgroundRole()`
"""
if widget.testAttribute(Qt.WA_StyledBackground):
opt = QStyleOption()
opt.initFrom(widget)
opt.rect = rect.toAlignedRect()
widget.style().drawPrimitive(QStyle.PE_Widget, opt,
painter, widget)
else:
brush = widget.palette().brush(widget.backgroundRole())
painter.fillRect(rect, brush)
def backingStore(self, widget, size):
"""
:param QWidget widget: Widget, for which the backinstore is intended
:param QSize size: Size of the pixmap
:return: A pixmap that can be used as backing store
"""
if QT_VERSION >= 0x050000:
pixelRatio = 1.
if widget and widget.windowHandle():
pixelRatio = widget.windowHandle().devicePixelRatio()
else:
from qwt.qt.QtGui import qApp
if qApp is not None:
try:
pixelRatio = qApp.devicePixelRatio()
except RuntimeError:
pass
pm = QPixmap(size*pixelRatio)
pm.setDevicePixelRatio(pixelRatio)
else:
pm = QPixmap(size)
if QT_VERSION < 0x050000 and widget and isX11GraphicsSystem():
if pm.x11Info().screen() != widget.x11Info().screen():
pm.x11SetScreen(widget.x11Info().screen())
return pm
QwtPainter = QwtPainterClass()
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