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Diffstat (limited to 'examples/widgets/effects/lighting.py')
| -rw-r--r-- | examples/widgets/effects/lighting.py | 144 |
1 files changed, 0 insertions, 144 deletions
diff --git a/examples/widgets/effects/lighting.py b/examples/widgets/effects/lighting.py deleted file mode 100644 index 596db4ed9..000000000 --- a/examples/widgets/effects/lighting.py +++ /dev/null @@ -1,144 +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." -## -## $QT_END_LICENSE$ -## -############################################################################# - -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_()) |