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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 PySide.QtCore import *
from PySide.QtGui import *
from PySide.QtOpenGL import *
try:
from OpenGL import GL
except ImportError:
app = QApplication(sys.argv)
QMessageBox.critical(None, "OpenGL 2dpainting",
"PyOpenGL must be installed to run this example.",
QMessageBox.Ok | QMessageBox.Default,
QMessageBox.NoButton)
sys.exit(1)
class Helper:
def __init__(self):
gradient = QLinearGradient(QPointF(50, -20), QPointF(80, 20))
gradient.setColorAt(0.0, Qt.white)
gradient.setColorAt(1.0, QColor(0xa6, 0xce, 0x39))
self.background = QBrush(QColor(64, 32, 64))
self.circleBrush = QBrush(gradient)
self.circlePen = QPen(Qt.black)
self.circlePen.setWidth(1)
self.textPen = QPen(Qt.white)
self.textFont = 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(QRectF(radius, -circleRadius,
circleRadius*2, circleRadius*2))
painter.restore()
painter.setPen(self.textPen)
painter.setFont(self.textFont)
painter.drawText(QRect(-50, -50, 100, 100), Qt.AlignCenter, "Qt")
class Widget(QWidget):
def __init__(self, helper, parent = None):
QWidget.__init__(self, 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 = QPainter()
painter.begin(self)
painter.setRenderHint(QPainter.Antialiasing)
self.helper.paint(painter, event, self.elapsed)
painter.end()
class GLWidget(QGLWidget):
def __init__(self, helper, parent = None):
QGLWidget.__init__(self, QGLFormat(QGL.SampleBuffers), 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 = QPainter()
painter.begin(self)
self.helper.paint(painter, event, self.elapsed)
painter.end()
class Window(QWidget):
def __init__(self, parent = None):
QWidget.__init__(self, parent)
helper = Helper()
native = Widget(helper, self)
openGL = GLWidget(helper, self)
nativeLabel = QLabel(self.tr("Native"))
nativeLabel.setAlignment(Qt.AlignHCenter)
openGLLabel = QLabel(self.tr("OpenGL"))
openGLLabel.setAlignment(Qt.AlignHCenter)
layout = 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 = QTimer(self)
self.connect(timer, SIGNAL("timeout()"), native.animate)
self.connect(timer, SIGNAL("timeout()"), openGL.animate)
timer.start(50)
self.setWindowTitle(self.tr("2D Painting on Native and OpenGL Widgets"))
if __name__ == '__main__':
app = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())
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