#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2010 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
## the names of its contributors may be used to endorse or promote
## products derived from this software without specific prior written
## permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
## $QT_END_LICENSE$
##
#############################################################################
# This is only needed for Python v2 but is harmless for Python v3.
import sip
sip.setapi('QVariant', 2)
from math import cos, pi, sin
from PyQt4 import QtCore, QtGui
class RenderArea(QtGui.QWidget):
def __init__(self, path, parent=None):
super(RenderArea, self).__init__(parent)
self.path = path
self.penWidth = 1
self.rotationAngle = 0
self.setBackgroundRole(QtGui.QPalette.Base)
def minimumSizeHint(self):
return QtCore.QSize(50, 50)
def sizeHint(self):
return QtCore.QSize(100, 100)
def setFillRule(self, rule):
self.path.setFillRule(rule)
self.update()
def setFillGradient(self, color1, color2):
self.fillColor1 = color1
self.fillColor2 = color2
self.update()
def setPenWidth(self, width):
self.penWidth = width
self.update()
def setPenColor(self, color):
self.penColor = color
self.update()
def setRotationAngle(self, degrees):
self.rotationAngle = degrees
self.update()
def paintEvent(self, event):
painter = QtGui.QPainter(self)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
painter.scale(self.width() / 100.0, self.height() / 100.0)
painter.translate(50.0, 50.0)
painter.rotate(-self.rotationAngle)
painter.translate(-50.0, -50.0)
painter.setPen(QtGui.QPen(self.penColor, self.penWidth,
QtCore.Qt.SolidLine, QtCore.Qt.RoundCap, QtCore.Qt.RoundJoin))
gradient = QtGui.QLinearGradient(0, 0, 0, 100)
gradient.setColorAt(0.0, self.fillColor1)
gradient.setColorAt(1.0, self.fillColor2)
painter.setBrush(QtGui.QBrush(gradient))
painter.drawPath(self.path)
class Window(QtGui.QWidget):
NumRenderAreas = 9
def __init__(self):
super(Window, self).__init__()
rectPath = QtGui.QPainterPath()
rectPath.moveTo(20.0, 30.0)
rectPath.lineTo(80.0, 30.0)
rectPath.lineTo(80.0, 70.0)
rectPath.lineTo(20.0, 70.0)
rectPath.closeSubpath()
roundRectPath = QtGui.QPainterPath()
roundRectPath.moveTo(80.0, 35.0)
roundRectPath.arcTo(70.0, 30.0, 10.0, 10.0, 0.0, 90.0)
roundRectPath.lineTo(25.0, 30.0)
roundRectPath.arcTo(20.0, 30.0, 10.0, 10.0, 90.0, 90.0)
roundRectPath.lineTo(20.0, 65.0)
roundRectPath.arcTo(20.0, 60.0, 10.0, 10.0, 180.0, 90.0)
roundRectPath.lineTo(75.0, 70.0)
roundRectPath.arcTo(70.0, 60.0, 10.0, 10.0, 270.0, 90.0)
roundRectPath.closeSubpath()
ellipsePath = QtGui.QPainterPath()
ellipsePath.moveTo(80.0, 50.0)
ellipsePath.arcTo(20.0, 30.0, 60.0, 40.0, 0.0, 360.0)
piePath = QtGui.QPainterPath()
piePath.moveTo(50.0, 50.0)
piePath.lineTo(65.0, 32.6795)
piePath.arcTo(20.0, 30.0, 60.0, 40.0, 60.0, 240.0)
piePath.closeSubpath()
polygonPath = QtGui.QPainterPath()
polygonPath.moveTo(10.0, 80.0)
polygonPath.lineTo(20.0, 10.0)
polygonPath.lineTo(80.0, 30.0)
polygonPath.lineTo(90.0, 70.0)
polygonPath.closeSubpath()
groupPath = QtGui.QPainterPath()
groupPath.moveTo(60.0, 40.0)
groupPath.arcTo(20.0, 20.0, 40.0, 40.0, 0.0, 360.0)
groupPath.moveTo(40.0, 40.0)
groupPath.lineTo(40.0, 80.0)
groupPath.lineTo(80.0, 80.0)
groupPath.lineTo(80.0, 40.0)
groupPath.closeSubpath()
textPath = QtGui.QPainterPath()
timesFont = QtGui.QFont("Times", 50)
timesFont.setStyleStrategy(QtGui.QFont.ForceOutline)
textPath.addText(10, 70, timesFont, "Qt")
bezierPath = QtGui.QPainterPath()
bezierPath.moveTo(20, 30)
bezierPath.cubicTo(80, 0, 50, 50, 80, 80)
starPath = QtGui.QPainterPath()
starPath.moveTo(90, 50)
for i in range(1, 5):
starPath.lineTo(50 + 40 * cos(0.8 * i * pi),
50 + 40 * sin(0.8 * i * pi))
starPath.closeSubpath()
self.renderAreas = [RenderArea(rectPath), RenderArea(roundRectPath),
RenderArea(ellipsePath), RenderArea(piePath),
RenderArea(polygonPath), RenderArea(groupPath),
RenderArea(textPath), RenderArea(bezierPath),
RenderArea(starPath)]
assert len(self.renderAreas) == 9
self.fillRuleComboBox = QtGui.QComboBox()
self.fillRuleComboBox.addItem("Odd Even", QtCore.Qt.OddEvenFill)
self.fillRuleComboBox.addItem("Winding", QtCore.Qt.WindingFill)
fillRuleLabel = QtGui.QLabel("Fill &Rule:")
fillRuleLabel.setBuddy(self.fillRuleComboBox)
self.fillColor1ComboBox = QtGui.QComboBox()
self.populateWithColors(self.fillColor1ComboBox)
self.fillColor1ComboBox.setCurrentIndex(
self.fillColor1ComboBox.findText("mediumslateblue"))
self.fillColor2ComboBox = QtGui.QComboBox()
self.populateWithColors(self.fillColor2ComboBox)
self.fillColor2ComboBox.setCurrentIndex(
self.fillColor2ComboBox.findText("cornsilk"))
fillGradientLabel = QtGui.QLabel("&Fill Gradient:")
fillGradientLabel.setBuddy(self.fillColor1ComboBox)
fillToLabel = QtGui.QLabel("to")
fillToLabel.setSizePolicy(QtGui.QSizePolicy.Fixed,
QtGui.QSizePolicy.Fixed)
self.penWidthSpinBox = QtGui.QSpinBox()
self.penWidthSpinBox.setRange(0, 20)
penWidthLabel = QtGui.QLabel("&Pen Width:")
penWidthLabel.setBuddy(self.penWidthSpinBox)
self.penColorComboBox = QtGui.QComboBox()
self.populateWithColors(self.penColorComboBox)
self.penColorComboBox.setCurrentIndex(
self.penColorComboBox.findText('darkslateblue'))
penColorLabel = QtGui.QLabel("Pen &Color:")
penColorLabel.setBuddy(self.penColorComboBox)
self.rotationAngleSpinBox = QtGui.QSpinBox()
self.rotationAngleSpinBox.setRange(0, 359)
self.rotationAngleSpinBox.setWrapping(True)
self.rotationAngleSpinBox.setSuffix('\xB0')
rotationAngleLabel = QtGui.QLabel("&Rotation Angle:")
rotationAngleLabel.setBuddy(self.rotationAngleSpinBox)
self.fillRuleComboBox.activated.connect(self.fillRuleChanged)
self.fillColor1ComboBox.activated.connect(self.fillGradientChanged)
self.fillColor2ComboBox.activated.connect(self.fillGradientChanged)
self.penColorComboBox.activated.connect(self.penColorChanged)
for i in range(Window.NumRenderAreas):
self.penWidthSpinBox.valueChanged.connect(self.renderAreas[i].setPenWidth)
self.rotationAngleSpinBox.valueChanged.connect(self.renderAreas[i].setRotationAngle)
topLayout = QtGui.QGridLayout()
for i in range(Window.NumRenderAreas):
topLayout.addWidget(self.renderAreas[i], i / 3, i % 3)
mainLayout = QtGui.QGridLayout()
mainLayout.addLayout(topLayout, 0, 0, 1, 4)
mainLayout.addWidget(fillRuleLabel, 1, 0)
mainLayout.addWidget(self.fillRuleComboBox, 1, 1, 1, 3)
mainLayout.addWidget(fillGradientLabel, 2, 0)
mainLayout.addWidget(self.fillColor1ComboBox, 2, 1)
mainLayout.addWidget(fillToLabel, 2, 2)
mainLayout.addWidget(self.fillColor2ComboBox, 2, 3)
mainLayout.addWidget(penWidthLabel, 3, 0)
mainLayout.addWidget(self.penWidthSpinBox, 3, 1, 1, 3)
mainLayout.addWidget(penColorLabel, 4, 0)
mainLayout.addWidget(self.penColorComboBox, 4, 1, 1, 3)
mainLayout.addWidget(rotationAngleLabel, 5, 0)
mainLayout.addWidget(self.rotationAngleSpinBox, 5, 1, 1, 3)
self.setLayout(mainLayout)
self.fillRuleChanged()
self.fillGradientChanged()
self.penColorChanged()
self.penWidthSpinBox.setValue(2)
self.setWindowTitle("Painter Paths")
def fillRuleChanged(self):
rule = QtCore.Qt.FillRule(self.currentItemData(self.fillRuleComboBox))
for i in range(Window.NumRenderAreas):
self.renderAreas[i].setFillRule(rule)
def fillGradientChanged(self):
color1 = QtGui.QColor(self.currentItemData(self.fillColor1ComboBox))
color2 = QtGui.QColor(self.currentItemData(self.fillColor2ComboBox))
for i in range(Window.NumRenderAreas):
self.renderAreas[i].setFillGradient(color1, color2)
def penColorChanged(self):
color = QtGui.QColor(self.currentItemData(self.penColorComboBox))
for i in range(Window.NumRenderAreas):
self.renderAreas[i].setPenColor(color)
def populateWithColors(self, comboBox):
colorNames = QtGui.QColor.colorNames()
for name in colorNames:
comboBox.addItem(name, name)
def currentItemData(self, comboBox):
return comboBox.itemData(comboBox.currentIndex())
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())
