diff options
author | Friedemann Kleint <Friedemann.Kleint@qt.io> | 2018-01-05 15:58:35 +0100 |
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committer | Friedemann Kleint <Friedemann.Kleint@qt.io> | 2018-01-12 12:28:10 +0000 |
commit | 9f2a9aba3aff73e31ea15eb4a7a04b0e50f4ee4e (patch) | |
tree | 92dcb0c4f64df8a8375af2e1a9bb1170068c36b2 /examples/widgets/effects | |
parent | 26c046e521c38bbfc3a263782a3bb74a7c1bf937 (diff) |
Move examples from submodule to pyside-setup
Move PySide2 examples that are owned by the Qt Company
to a new examples directory.
Done-with: Venugopal Shivashankar <Venugopal.Shivashankar@qt.io>
Task-number: PYSIDE-363
Change-Id: I14099764d9eef2bc35e067086121427955862e3a
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Diffstat (limited to 'examples/widgets/effects')
-rwxr-xr-x | examples/widgets/effects/lighting.py | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/examples/widgets/effects/lighting.py b/examples/widgets/effects/lighting.py new file mode 100755 index 000000000..efbb74711 --- /dev/null +++ b/examples/widgets/effects/lighting.py @@ -0,0 +1,145 @@ +#!/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." +## +## $QT_END_LICENSE$ +## +############################################################################# + +import math + +from PySide2 import QtCore, QtGui, QtWidgets + + +class Lighting(QtWidgets.QGraphicsView): + def __init__(self, parent=None): + super(Lighting, self).__init__(parent) + + self.angle = 0.0 + self.m_scene = QtWidgets.QGraphicsScene() + self.m_lightSource = None + self.m_items = [] + + self.setScene(self.m_scene) + + self.setupScene() + + timer = QtCore.QTimer(self) + timer.timeout.connect(self.animate) + timer.setInterval(30) + timer.start() + + self.setRenderHint(QtGui.QPainter.Antialiasing) + self.setFrameStyle(QtWidgets.QFrame.NoFrame) + + def setupScene(self): + self.m_scene.setSceneRect(-300, -200, 600, 460) + + linearGrad = QtGui.QLinearGradient(QtCore.QPointF(-100, -100), + QtCore.QPointF(100, 100)) + linearGrad.setColorAt(0, QtGui.QColor(255, 255, 255)) + linearGrad.setColorAt(1, QtGui.QColor(192, 192, 255)) + self.setBackgroundBrush(linearGrad) + + radialGrad = QtGui.QRadialGradient(30, 30, 30) + radialGrad.setColorAt(0, QtCore.Qt.yellow) + radialGrad.setColorAt(0.2, QtCore.Qt.yellow) + radialGrad.setColorAt(1, QtCore.Qt.transparent) + + pixmap = QtGui.QPixmap(60, 60) + pixmap.fill(QtCore.Qt.transparent) + + painter = QtGui.QPainter(pixmap) + painter.setPen(QtCore.Qt.NoPen) + painter.setBrush(radialGrad) + painter.drawEllipse(0, 0, 60, 60) + painter.end() + + self.m_lightSource = self.m_scene.addPixmap(pixmap) + self.m_lightSource.setZValue(2) + + for i in range(-2, 3): + for j in range(-2, 3): + if (i + j) & 1: + item = QtWidgets.QGraphicsEllipseItem(0, 0, 50, 50) + else: + item = QtWidgets.QGraphicsRectItem(0, 0, 50, 50) + + item.setPen(QtGui.QPen(QtCore.Qt.black, 1)) + item.setBrush(QtGui.QBrush(QtCore.Qt.white)) + + effect = QtWidgets.QGraphicsDropShadowEffect(self) + effect.setBlurRadius(8) + item.setGraphicsEffect(effect) + item.setZValue(1) + item.setPos(i * 80, j * 80) + self.m_scene.addItem(item) + self.m_items.append(item) + + def animate(self): + self.angle += (math.pi / 30) + xs = 200 * math.sin(self.angle) - 40 + 25 + ys = 200 * math.cos(self.angle) - 40 + 25 + self.m_lightSource.setPos(xs, ys) + + for item in self.m_items: + effect = item.graphicsEffect() + + delta = QtCore.QPointF(item.x() - xs, item.y() - ys) + effect.setOffset(QtCore.QPointF(delta.toPoint() / 30)) + + dd = math.hypot(delta.x(), delta.y()) + color = effect.color() + color.setAlphaF(max(0.4, min(1 - dd / 200.0, 0.7))) + effect.setColor(color) + + self.m_scene.update() + + +if __name__ == '__main__': + + import sys + + app = QtWidgets.QApplication(sys.argv) + + lighting = Lighting() + lighting.setWindowTitle("Lighting and Shadows") + lighting.resize(640, 480) + lighting.show() + + sys.exit(app.exec_()) |