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Diffstat (limited to 'examples/widgets/graphicsview/collidingmice/collidingmice.py')
| -rw-r--r-- | examples/widgets/graphicsview/collidingmice/collidingmice.py | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/examples/widgets/graphicsview/collidingmice/collidingmice.py b/examples/widgets/graphicsview/collidingmice/collidingmice.py new file mode 100644 index 000000000..03c7ed199 --- /dev/null +++ b/examples/widgets/graphicsview/collidingmice/collidingmice.py @@ -0,0 +1,217 @@ +#!/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 + +import mice_rc + + +class Mouse(QtWidgets.QGraphicsItem): + Pi = math.pi + TwoPi = 2.0 * Pi + + # Create the bounding rectangle once. + adjust = 0.5 + BoundingRect = QtCore.QRectF(-20 - adjust, -22 - adjust, 40 + adjust, + 83 + adjust) + + def __init__(self): + super(Mouse, self).__init__() + + self.angle = 0.0 + self.speed = 0.0 + self.mouseEyeDirection = 0.0 + self.color = QtGui.QColor(QtCore.qrand() % 256, QtCore.qrand() % 256, + QtCore.qrand() % 256) + + self.setTransform(QtGui.QTransform().rotate(QtCore.qrand() % (360 * 16))) + + # In the C++ version of this example, this class is also derived from + # QObject in order to receive timer events. PySide2 does not support + # deriving from more than one wrapped class so we just create an + # explicit timer instead. + self.timer = QtCore.QTimer() + self.timer.timeout.connect(self.timerEvent) + self.timer.start(1000 / 33) + + @staticmethod + def normalizeAngle(angle): + while angle < 0: + angle += Mouse.TwoPi + while angle > Mouse.TwoPi: + angle -= Mouse.TwoPi + return angle + + def boundingRect(self): + return Mouse.BoundingRect + + def shape(self): + path = QtGui.QPainterPath() + path.addRect(-10, -20, 20, 40) + return path; + + def paint(self, painter, option, widget): + # Body. + painter.setBrush(self.color) + painter.drawEllipse(-10, -20, 20, 40) + + # Eyes. + painter.setBrush(QtCore.Qt.white) + painter.drawEllipse(-10, -17, 8, 8) + painter.drawEllipse(2, -17, 8, 8) + + # Nose. + painter.setBrush(QtCore.Qt.black) + painter.drawEllipse(QtCore.QRectF(-2, -22, 4, 4)) + + # Pupils. + painter.drawEllipse(QtCore.QRectF(-8.0 + self.mouseEyeDirection, -17, 4, 4)) + painter.drawEllipse(QtCore.QRectF(4.0 + self.mouseEyeDirection, -17, 4, 4)) + + # Ears. + if self.scene().collidingItems(self): + painter.setBrush(QtCore.Qt.red) + else: + painter.setBrush(QtCore.Qt.darkYellow) + + painter.drawEllipse(-17, -12, 16, 16) + painter.drawEllipse(1, -12, 16, 16) + + # Tail. + path = QtGui.QPainterPath(QtCore.QPointF(0, 20)) + path.cubicTo(-5, 22, -5, 22, 0, 25) + path.cubicTo(5, 27, 5, 32, 0, 30) + path.cubicTo(-5, 32, -5, 42, 0, 35) + painter.setBrush(QtCore.Qt.NoBrush) + painter.drawPath(path) + + def timerEvent(self): + # Don't move too far away. + lineToCenter = QtCore.QLineF(QtCore.QPointF(0, 0), self.mapFromScene(0, 0)) + if lineToCenter.length() > 150: + angleToCenter = math.acos(lineToCenter.dx() / lineToCenter.length()) + if lineToCenter.dy() < 0: + angleToCenter = Mouse.TwoPi - angleToCenter; + angleToCenter = Mouse.normalizeAngle((Mouse.Pi - angleToCenter) + Mouse.Pi / 2) + + if angleToCenter < Mouse.Pi and angleToCenter > Mouse.Pi / 4: + # Rotate left. + self.angle += [-0.25, 0.25][self.angle < -Mouse.Pi / 2] + elif angleToCenter >= Mouse.Pi and angleToCenter < (Mouse.Pi + Mouse.Pi / 2 + Mouse.Pi / 4): + # Rotate right. + self.angle += [-0.25, 0.25][self.angle < Mouse.Pi / 2] + elif math.sin(self.angle) < 0: + self.angle += 0.25 + elif math.sin(self.angle) > 0: + self.angle -= 0.25 + + # Try not to crash with any other mice. + dangerMice = self.scene().items(QtGui.QPolygonF([self.mapToScene(0, 0), + self.mapToScene(-30, -50), + self.mapToScene(30, -50)])) + + for item in dangerMice: + if item is self: + continue + + lineToMouse = QtCore.QLineF(QtCore.QPointF(0, 0), self.mapFromItem(item, 0, 0)) + angleToMouse = math.acos(lineToMouse.dx() / lineToMouse.length()) + if lineToMouse.dy() < 0: + angleToMouse = Mouse.TwoPi - angleToMouse + angleToMouse = Mouse.normalizeAngle((Mouse.Pi - angleToMouse) + Mouse.Pi / 2) + + if angleToMouse >= 0 and angleToMouse < Mouse.Pi / 2: + # Rotate right. + self.angle += 0.5 + elif angleToMouse <= Mouse.TwoPi and angleToMouse > (Mouse.TwoPi - Mouse.Pi / 2): + # Rotate left. + self.angle -= 0.5 + + # Add some random movement. + if len(dangerMice) > 1 and (QtCore.qrand() % 10) == 0: + if QtCore.qrand() % 1: + self.angle += (QtCore.qrand() % 100) / 500.0 + else: + self.angle -= (QtCore.qrand() % 100) / 500.0 + + self.speed += (-50 + QtCore.qrand() % 100) / 100.0 + + dx = math.sin(self.angle) * 10 + self.mouseEyeDirection = [dx / 5, 0.0][QtCore.qAbs(dx / 5) < 1] + + self.setTransform(QtGui.QTransform().rotate(dx)) + self.setPos(self.mapToParent(0, -(3 + math.sin(self.speed) * 3))) + + +if __name__ == '__main__': + + import sys + + MouseCount = 7 + + app = QtWidgets.QApplication(sys.argv) + QtCore.qsrand(QtCore.QTime(0,0,0).secsTo(QtCore.QTime.currentTime())) + + scene = QtWidgets.QGraphicsScene() + scene.setSceneRect(-300, -300, 600, 600) + scene.setItemIndexMethod(QtWidgets.QGraphicsScene.NoIndex) + + for i in range(MouseCount): + mouse = Mouse() + mouse.setPos(math.sin((i * 6.28) / MouseCount) * 200, + math.cos((i * 6.28) / MouseCount) * 200) + scene.addItem(mouse) + + view = QtWidgets.QGraphicsView(scene) + view.setRenderHint(QtGui.QPainter.Antialiasing) + view.setBackgroundBrush(QtGui.QBrush(QtGui.QPixmap(':/images/cheese.jpg'))) + view.setCacheMode(QtWidgets.QGraphicsView.CacheBackground) + view.setViewportUpdateMode(QtWidgets.QGraphicsView.BoundingRectViewportUpdate) + view.setDragMode(QtWidgets.QGraphicsView.ScrollHandDrag) + view.setWindowTitle("Colliding Mice") + view.resize(400, 300) + view.show() + + sys.exit(app.exec_()) |