diff options
Diffstat (limited to 'examples/widgets/painting/concentriccircles/concentriccircles.py')
| -rw-r--r-- | examples/widgets/painting/concentriccircles/concentriccircles.py | 81 |
1 files changed, 22 insertions, 59 deletions
diff --git a/examples/widgets/painting/concentriccircles/concentriccircles.py b/examples/widgets/painting/concentriccircles/concentriccircles.py index d3df51099..d2c60178f 100644 --- a/examples/widgets/painting/concentriccircles/concentriccircles.py +++ b/examples/widgets/painting/concentriccircles/concentriccircles.py @@ -1,51 +1,14 @@ +# Copyright (C) 2013 Riverbank Computing Limited. +# Copyright (C) 2022 The Qt Company Ltd. +# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause -############################################################################# -## -## 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." -## -## $QT_END_LICENSE$ -## -############################################################################# - -"""PySide6 port of the widgets/painting/concentriccircles example from Qt v5.x, originating from PyQt""" +"""PySide6 port of the widgets/painting/concentriccircles example from Qt v5.x, originating + from PyQt""" from PySide6.QtCore import QRect, QRectF, QSize, Qt, QTimer from PySide6.QtGui import QColor, QPainter, QPalette, QPen from PySide6.QtWidgets import (QApplication, QFrame, QGridLayout, QLabel, - QSizePolicy, QWidget) + QSizePolicy, QWidget) class CircleWidget(QWidget): @@ -78,22 +41,22 @@ class CircleWidget(QWidget): 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._frame_no % 128) - diameter / 2) - alpha = 255 - (delta * delta) / 4 - diameter - if alpha > 0: - painter.setPen(QPen(QColor(0, diameter / 2, 127, alpha), 3)) - - if self._float_based: - painter.drawEllipse(QRectF(-diameter / 2.0, - -diameter / 2.0, diameter, diameter)) - else: - painter.drawEllipse(QRect(-diameter / 2, - -diameter / 2, diameter, diameter)) + with QPainter(self) as painter: + painter.setRenderHint(QPainter.Antialiasing, self.antialiased) + painter.translate(self.width() / 2, self.height() / 2) + + for diameter in range(0, 256, 9): + delta = abs((self._frame_no % 128) - diameter / 2) + alpha = 255 - (delta * delta) / 4 - diameter + if alpha > 0: + painter.setPen(QPen(QColor(0, diameter / 2, 127, alpha), 3)) + + if self._float_based: + painter.drawEllipse(QRectF(-diameter / 2.0, + -diameter / 2.0, diameter, diameter)) + else: + painter.drawEllipse(QRect(-diameter / 2, + -diameter / 2, diameter, diameter)) class Window(QWidget): |