############################################################################# ## ## 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 import mice_rc def random(boundary): return QtCore.QRandomGenerator.global_().bounded(boundary) 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(random(256), random(256), random(256)) self.setTransform(QtGui.QTransform().rotate(random(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 += random(100) / 500.0 else: self.angle -= random(100) / 500.0 self.speed += (-50 + random(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) 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_())