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#!/usr/bin/env python
############################################################################
##
## Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
##
## This file is part of the example classes of the Qt Toolkit.
##
## This file may be used under the terms of the GNU General Public
## License version 2.0 as published by the Free Software Foundation
## and appearing in the file LICENSE.GPL included in the packaging of
## this file. Please review the following information to ensure GNU
## General Public Licensing requirements will be met:
## http://www.trolltech.com/products/qt/opensource.html
##
## If you are unsure which license is appropriate for your use, please
## review the following information:
## http://www.trolltech.com/products/qt/licensing.html or contact the
## sales department at sales@trolltech.com.
##
## This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
## WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
##
############################################################################
import sys
import math
from PyQt4 import QtCore, QtGui, QtOpenGL
try:
from OpenGL import GL
except ImportError:
app = QtGui.QApplication(sys.argv)
QtGui.QMessageBox.critical(None, "OpenGL 2dpainting",
"PyOpenGL must be installed to run this example.")
sys.exit(1)
class Helper(object):
def __init__(self):
gradient = QtGui.QLinearGradient(QtCore.QPointF(50, -20),
QtCore.QPointF(80, 20))
gradient.setColorAt(0.0, QtCore.Qt.white)
gradient.setColorAt(1.0, QtGui.QColor(0xa6, 0xce, 0x39))
self.background = QtGui.QBrush(QtGui.QColor(64, 32, 64))
self.circleBrush = QtGui.QBrush(gradient)
self.circlePen = QtGui.QPen(QtCore.Qt.black)
self.circlePen.setWidth(1)
self.textPen = QtGui.QPen(QtCore.Qt.white)
self.textFont = QtGui.QFont()
self.textFont.setPixelSize(50)
def paint(self, painter, event, elapsed):
painter.fillRect(event.rect(), self.background)
painter.translate(100, 100)
painter.save()
painter.setBrush(self.circleBrush)
painter.setPen(self.circlePen)
painter.rotate(elapsed * 0.030)
r = elapsed/1000.0
n = 30
for i in range(n):
painter.rotate(30)
radius = 0 + 120.0*((i+r)/n)
circleRadius = 1 + ((i+r)/n)*20
painter.drawEllipse(QtCore.QRectF(radius, -circleRadius,
circleRadius*2, circleRadius*2))
painter.restore()
painter.setPen(self.textPen)
painter.setFont(self.textFont)
painter.drawText(QtCore.QRect(-50, -50, 100, 100),
QtCore.Qt.AlignCenter, "Qt")
class Widget(QtGui.QWidget):
def __init__(self, helper, parent):
super(Widget, self).__init__(parent)
self.helper = helper
self.elapsed = 0
self.setFixedSize(200, 200)
def animate(self):
self.elapsed = (self.elapsed + self.sender().interval()) % 1000
self.repaint()
def paintEvent(self, event):
painter = QtGui.QPainter()
painter.begin(self)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
self.helper.paint(painter, event, self.elapsed)
painter.end()
class GLWidget(QtOpenGL.QGLWidget):
def __init__(self, helper, parent):
super(GLWidget, self).__init__(QtOpenGL.QGLFormat(QtOpenGL.QGL.SampleBuffers), parent)
self.helper = helper
self.elapsed = 0
self.setFixedSize(200, 200)
self.setAutoFillBackground(False)
def animate(self):
self.elapsed = (self.elapsed + self.sender().interval()) % 1000
self.repaint()
def paintEvent(self, event):
painter = QtGui.QPainter()
painter.begin(self)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
self.helper.paint(painter, event, self.elapsed)
painter.end()
class Window(QtGui.QWidget):
def __init__(self):
super(Window, self).__init__()
helper = Helper()
native = Widget(helper, self)
openGL = GLWidget(helper, self)
nativeLabel = QtGui.QLabel("Native")
nativeLabel.setAlignment(QtCore.Qt.AlignHCenter)
openGLLabel = QtGui.QLabel("OpenGL")
openGLLabel.setAlignment(QtCore.Qt.AlignHCenter)
layout = QtGui.QGridLayout()
layout.addWidget(native, 0, 0)
layout.addWidget(openGL, 0, 1)
layout.addWidget(nativeLabel, 1, 0)
layout.addWidget(openGLLabel, 1, 1)
self.setLayout(layout)
timer = QtCore.QTimer(self)
timer.timeout.connect(native.animate)
timer.timeout.connect(openGL.animate)
timer.start(50)
self.setWindowTitle("2D Painting on Native and OpenGL Widgets")
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())
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