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Diffstat (limited to 'examples/opengl/2dpainting.py')
| -rwxr-xr-x | examples/opengl/2dpainting.py | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/examples/opengl/2dpainting.py b/examples/opengl/2dpainting.py new file mode 100755 index 000000000..6073024c5 --- /dev/null +++ b/examples/opengl/2dpainting.py @@ -0,0 +1,174 @@ +#!/usr/bin/env python + +############################################################################ +## +## Copyright (C) 2013 Riverbank Computing Limited. +## Copyright (C) 2016 The Qt Company Ltd. +## Contact: http://www.qt.io/licensing/ +## +## This file is part of the PySide examples of the Qt Toolkit. +## +## $QT_BEGIN_LICENSE:BSD$ +## 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 The Qt Company Ltd 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." +## +## $QT_END_LICENSE$ +## +############################################################################ + +"""PySide2 port of the opengl/legacy/2dpainting example from Qt v5.x""" + +import sys +import math +from PySide2.QtCore import * +from PySide2.QtGui import * +from PySide2.QtWidgets import * +from PySide2.QtOpenGL import * + +try: + from OpenGL import GL +except ImportError: + app = QApplication(sys.argv) + messageBox = QMessageBox(QMessageBox.Critical, "OpenGL 2dpainting", + "PyOpenGL must be installed to run this example.", + QMessageBox.Close) + messageBox.setDetailedText("Run:\npip install PyOpenGL PyOpenGL_accelerate") + messageBox.exec_() + 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_()) |