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Diffstat (limited to 'examples/widgetbinding/wigglywidget.py')
| -rw-r--r-- | examples/widgetbinding/wigglywidget.py | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/examples/widgetbinding/wigglywidget.py b/examples/widgetbinding/wigglywidget.py new file mode 100644 index 000000000..50a061074 --- /dev/null +++ b/examples/widgetbinding/wigglywidget.py @@ -0,0 +1,97 @@ +############################################################################ +## +## Copyright (C) 2020 The Qt Company Ltd. +## Contact: https://www.qt.io/licensing/ +## +## This file is part of the Qt for Python examples of the Qt Toolkit. +## +## $QT_BEGIN_LICENSE:BSD$ +## Commercial License Usage +## Licensees holding valid commercial Qt licenses may use this file in +## accordance with the commercial license agreement provided with the +## Software or, alternatively, in accordance with the terms contained in +## a written agreement between you and The Qt Company. For licensing terms +## and conditions see https://www.qt.io/terms-conditions. For further +## information use the contact form at https://www.qt.io/contact-us. +## +## BSD License Usage +## Alternatively, 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." +## +## $QT_END_LICENSE$ +## +############################################################################ + +from PySide2.QtCore import QBasicTimer +from PySide2.QtGui import QColor, QFontMetrics, QPainter, QPalette +from PySide2.QtWidgets import QWidget + + +class WigglyWidget(QWidget): + def __init__(self, parent=None): + super(WigglyWidget, self).__init__(parent) + self.step = 0 + self.text = "" + self.setBackgroundRole(QPalette.Midlight) + self.setAutoFillBackground(True) + + newFont = self.font() + newFont.setPointSize(newFont.pointSize() + 20) + self.setFont(newFont) + + self.timer = QBasicTimer() + self.timer.start(60, self) + + def paintEvent(self, event): + sineTable = [0, 38, 71, 92, 100, 92, 71, 38, 0, -38, -71, -92, -100, + -92, -71, -38] + + metrics = QFontMetrics(self.font()) + x = (self.width() - metrics.horizontalAdvance(self.text)) / 2 + y = (self.height() + metrics.ascent() - metrics.descent()) / 2 + color = QColor() + + painter = QPainter(self) + for i in range(len(self.text)): + index = (self.step + i) % 16 + color.setHsv((15 - index) * 16, 255, 191) + painter.setPen(color) + painter.drawText(x, y - ((sineTable[index] * metrics.height()) / 400), + str(self.text[i])) + x += metrics.horizontalAdvance(self.text[i]) + + def timerEvent(self, event): + if event.timerId() == self.timer.timerId(): + self.step += 1 + self.update() + else: + QWidget.timerEvent(event) + + def setText(self, text): + self.text = text |