#!/usr/bin/env python ############################################################################# ## ## Copyright (C) 2013 Riverbank Computing Limited. ## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ## All rights reserved. ## ## This file is part of the examples of PyQt. ## ## $QT_BEGIN_LICENSE:BSD$ ## 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 Nokia Corporation and its Subsidiary(-ies) 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 PyQt5.QtCore import (QAbstractTransition, QEasingCurve, QEvent, QParallelAnimationGroup, QPropertyAnimation, qrand, QRect, QSequentialAnimationGroup, qsrand, QState, QStateMachine, Qt, QTime, QTimer) from PyQt5.QtWidgets import (QApplication, QGraphicsScene, QGraphicsView, QGraphicsWidget) class StateSwitchEvent(QEvent): StateSwitchType = QEvent.User + 256 def __init__(self, rand=0): super(StateSwitchEvent, self).__init__(StateSwitchEvent.StateSwitchType) self.m_rand = rand def rand(self): return self.m_rand class QGraphicsRectWidget(QGraphicsWidget): def paint(self, painter, option, widget): painter.fillRect(self.rect(), Qt.blue) class StateSwitchTransition(QAbstractTransition): def __init__(self, rand): super(StateSwitchTransition, self).__init__() self.m_rand = rand def eventTest(self, event): return (event.type() == StateSwitchEvent.StateSwitchType and event.rand() == self.m_rand) def onTransition(self, event): pass class StateSwitcher(QState): def __init__(self, machine): super(StateSwitcher, self).__init__(machine) self.m_stateCount = 0 self.m_lastIndex = 0 def onEntry(self, event): n = qrand() % self.m_stateCount + 1 while n == self.m_lastIndex: n = qrand() % self.m_stateCount + 1 self.m_lastIndex = n self.machine().postEvent(StateSwitchEvent(n)) def onExit(self, event): pass def addState(self, state, animation): self.m_stateCount += 1 trans = StateSwitchTransition(self.m_stateCount) trans.setTargetState(state) self.addTransition(trans) trans.addAnimation(animation) def createGeometryState(w1, rect1, w2, rect2, w3, rect3, w4, rect4, parent): result = QState(parent) result.assignProperty(w1, 'geometry', rect1) result.assignProperty(w1, 'geometry', rect1) result.assignProperty(w2, 'geometry', rect2) result.assignProperty(w3, 'geometry', rect3) result.assignProperty(w4, 'geometry', rect4) return result if __name__ == '__main__': import sys app = QApplication(sys.argv) button1 = QGraphicsRectWidget() button2 = QGraphicsRectWidget() button3 = QGraphicsRectWidget() button4 = QGraphicsRectWidget() button2.setZValue(1) button3.setZValue(2) button4.setZValue(3) scene = QGraphicsScene(0, 0, 300, 300) scene.setBackgroundBrush(Qt.black) scene.addItem(button1) scene.addItem(button2) scene.addItem(button3) scene.addItem(button4) window = QGraphicsView(scene) window.setFrameStyle(0) window.setAlignment(Qt.AlignLeft | Qt.AlignTop) window.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff) window.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) machine = QStateMachine() group = QState() timer = QTimer() timer.setInterval(1250) timer.setSingleShot(True) group.entered.connect(timer.start) state1 = createGeometryState(button1, QRect(100, 0, 50, 50), button2, QRect(150, 0, 50, 50), button3, QRect(200, 0, 50, 50), button4, QRect(250, 0, 50, 50), group) state2 = createGeometryState(button1, QRect(250, 100, 50, 50), button2, QRect(250, 150, 50, 50), button3, QRect(250, 200, 50, 50), button4, QRect(250, 250, 50, 50), group) state3 = createGeometryState(button1, QRect(150, 250, 50, 50), button2, QRect(100, 250, 50, 50), button3, QRect(50, 250, 50, 50), button4, QRect(0, 250, 50, 50), group) state4 = createGeometryState(button1, QRect(0, 150, 50, 50), button2, QRect(0, 100, 50, 50), button3, QRect(0, 50, 50, 50), button4, QRect(0, 0, 50, 50), group) state5 = createGeometryState(button1, QRect(100, 100, 50, 50), button2, QRect(150, 100, 50, 50), button3, QRect(100, 150, 50, 50), button4, QRect(150, 150, 50, 50), group) state6 = createGeometryState(button1, QRect(50, 50, 50, 50), button2, QRect(200, 50, 50, 50), button3, QRect(50, 200, 50, 50), button4, QRect(200, 200, 50, 50), group) state7 = createGeometryState(button1, QRect(0, 0, 50, 50), button2, QRect(250, 0, 50, 50), button3, QRect(0, 250, 50, 50), button4, QRect(250, 250, 50, 50), group) group.setInitialState(state1) animationGroup = QParallelAnimationGroup() anim = QPropertyAnimation(button4, b'geometry') anim.setDuration(1000) anim.setEasingCurve(QEasingCurve.OutElastic) animationGroup.addAnimation(anim) subGroup = QSequentialAnimationGroup(animationGroup) subGroup.addPause(100) anim = QPropertyAnimation(button3, b'geometry') anim.setDuration(1000) anim.setEasingCurve(QEasingCurve.OutElastic) subGroup.addAnimation(anim) subGroup = QSequentialAnimationGroup(animationGroup) subGroup.addPause(150) anim = QPropertyAnimation(button2, b'geometry') anim.setDuration(1000) anim.setEasingCurve(QEasingCurve.OutElastic) subGroup.addAnimation(anim) subGroup = QSequentialAnimationGroup(animationGroup) subGroup.addPause(200) anim = QPropertyAnimation(button1, b'geometry') anim.setDuration(1000) anim.setEasingCurve(QEasingCurve.OutElastic) subGroup.addAnimation(anim) stateSwitcher = StateSwitcher(machine) group.addTransition(timer.timeout, stateSwitcher) stateSwitcher.addState(state1, animationGroup) stateSwitcher.addState(state2, animationGroup) stateSwitcher.addState(state3, animationGroup) stateSwitcher.addState(state4, animationGroup) stateSwitcher.addState(state5, animationGroup) stateSwitcher.addState(state6, animationGroup) stateSwitcher.addState(state7, animationGroup) machine.addState(group) machine.setInitialState(group) machine.start() window.resize(300, 300) window.show() qsrand(QTime(0, 0, 0).secsTo(QTime.currentTime())) sys.exit(app.exec_())