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Diffstat (limited to 'examples/widgets/painting/concentriccircles.py')
| -rw-r--r-- | examples/widgets/painting/concentriccircles.py | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/examples/widgets/painting/concentriccircles.py b/examples/widgets/painting/concentriccircles.py deleted file mode 100644 index ff13292d2..000000000 --- a/examples/widgets/painting/concentriccircles.py +++ /dev/null @@ -1,146 +0,0 @@ - -############################################################################# -## -## 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 Qt for Python 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 widgets/painting/concentriccircles example from Qt v5.x, originating from PyQt""" - -from PySide2.QtCore import QRect, QRectF, QSize, Qt, QTimer -from PySide2.QtGui import QColor, QPainter, QPalette, QPen -from PySide2.QtWidgets import (QApplication, QFrame, QGridLayout, QLabel, - QSizePolicy, QWidget) - - -class CircleWidget(QWidget): - def __init__(self, parent=None): - super(CircleWidget, self).__init__(parent) - - self.floatBased = False - self.antialiased = False - self.frameNo = 0 - - self.setBackgroundRole(QPalette.Base) - self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding) - - def setFloatBased(self, floatBased): - self.floatBased = floatBased - self.update() - - def setAntialiased(self, antialiased): - self.antialiased = antialiased - self.update() - - def minimumSizeHint(self): - return QSize(50, 50) - - def sizeHint(self): - return QSize(180, 180) - - def nextAnimationFrame(self): - self.frameNo += 1 - self.update() - - def paintEvent(self, event): - painter = QPainter(self) - painter.setRenderHint(QPainter.Antialiasing, self.antialiased) - painter.translate(self.width() / 2, self.height() / 2) - - for diameter in range(0, 256, 9): - delta = abs((self.frameNo % 128) - diameter / 2) - alpha = 255 - (delta * delta) / 4 - diameter - if alpha > 0: - painter.setPen(QPen(QColor(0, diameter / 2, 127, alpha), 3)) - - if self.floatBased: - painter.drawEllipse(QRectF(-diameter / 2.0, - -diameter / 2.0, diameter, diameter)) - else: - painter.drawEllipse(QRect(-diameter / 2, - -diameter / 2, diameter, diameter)) - - -class Window(QWidget): - def __init__(self): - super(Window, self).__init__() - - aliasedLabel = self.createLabel("Aliased") - antialiasedLabel = self.createLabel("Antialiased") - intLabel = self.createLabel("Int") - floatLabel = self.createLabel("Float") - - layout = QGridLayout() - layout.addWidget(aliasedLabel, 0, 1) - layout.addWidget(antialiasedLabel, 0, 2) - layout.addWidget(intLabel, 1, 0) - layout.addWidget(floatLabel, 2, 0) - - timer = QTimer(self) - - for i in range(2): - for j in range(2): - w = CircleWidget() - w.setAntialiased(j != 0) - w.setFloatBased(i != 0) - - timer.timeout.connect(w.nextAnimationFrame) - - layout.addWidget(w, i + 1, j + 1) - - timer.start(100) - self.setLayout(layout) - - self.setWindowTitle("Concentric Circles") - - def createLabel(self, text): - label = QLabel(text) - label.setAlignment(Qt.AlignCenter) - label.setMargin(2) - label.setFrameStyle(QFrame.Box | QFrame.Sunken) - return label - - -if __name__ == '__main__': - - import sys - - app = QApplication(sys.argv) - window = Window() - window.show() - sys.exit(app.exec_()) |