PyQt实现界面翻转切换效果是用qt的场景功能来实现的，用到了QGraphicsView，QGraphicsLinearLayout，QGraphicsWidget等有关qt场景的库。算是对qt场景的一个小小的尝试，涉及内容不深，程序效果并是随心所欲，需要去进一步的改善和提高。暂且先把代码贴在此处，供大家学习和指正。
工程包括四个类:
界面A，TestMainWindow，用来充当翻转效果的A面。
界面B，TestMainWindowTwo，用来充当翻转效果的B面。
绘图界面：TestGraphicWidget，用来绘制界面A和B。
主界面：MainWindow，是一个全屏的透明窗口，是整个效果展现的总舞台，内部包含一个QGraphicsScene和一个QGraphicsView，用来展示效果中的界面翻转和界面替换。
整个效果的原理总结为几点：
首先，将整个效果需要的所有界面添加到TestGraphicWidget中，在将TestGraphicWidget放入到QGraphicsScene中，然后经QGraphicsScene添加到主界面中。
然后，界面切换实现，两个函数，非常简单，要显示A，就把B移除并隐藏，要显示B，则把A移除并隐藏。
def setOne(self): self.twoWidget.hide() self.oneWidget.show() self.layout.removeItem(self.twoTestWidget) self.layout.addItem(self.oneTestWidget) self.view.update() def setTwo(self): self.oneWidget.hide() self.twoWidget.show() self.layout.removeItem(self.oneTestWidget) self.layout.addItem(self.twoTestWidget) self.view.update()
然后是最重要的，翻转效果的实现，用的是TestGraphicWidget特有的翻转方法，参数可以根据实景情况调整。
def transeformR(self,count): r = self.form.boundingRect() for i in range(1,count): self.form.setTransform(QTransform() .translate(r.width() / 2, r.height() / 2) .rotate(91.00/count*i - 360 * 1, Qt.YAxis) .translate(-r.width() / 2, -r.height() / 2)) self.waitMethod() self.view.update() self.form.setTransform(QTransform() .translate(r.width() / 2, r.height() / 2) .rotate(270 - 360 * 1, Qt.YAxis) .translate(-r.width() / 2, -r.height() / 2)) self.view.update() if self.formflag %2 == 0: self.setOne() else: self.setTwo() for i in range(1,count): self.form.setTransform(QTransform() .translate(r.width() / 2, r.height() / 2) .rotate(270 + 93.00/count*i - 360 * 1, Qt.YAxis) .translate(-r.width() / 2, -r.height() / 2)) self.waitMethod() self.view.update()
而且提供了两种让程序等待但界面不会卡死的方法：
def sleep(self,msec): dieTime = QTime.currentTime().addMSecs(msec) print dieTime,QTime.currentTime() #a = 0 while( QTime.currentTime() < dieTime ): #print "000000000000" QCoreApplication.processEvents(QEventLoop.AllEvents, 100) def waitMethod(self): tt = QElapsedTimer() tt.start() q = QEventLoop() t = QTimer() t.setSingleShot(True) self.connect(t, SIGNAL("timeout()"), q.quit) t.start(1) # 5s timeout q.exec_() if(t.isActive()): t.stop() else: pass print tt.elapsed() 下面粘上源码，供参考，这个源码可以直接运行，内部的调试信息可以忽略：
#coding:utf-8 ''''' Created on 2015 7 15 @author: guowu ''' from PyQt4.QtGui import QWidget, QTextEdit, QPushButton, QGraphicsScene,/ QGraphicsWidget, QGraphicsLinearLayout, QGraphicsView, QApplication,/ QTransform, QHBoxLayout, QPainter, QLabel, QGraphicsLayoutItem, QFont,/ QPixmap, QBrush from PyQt4.QtCore import Qt, QTime, QCoreApplication, QEventLoop, QObject,/ SIGNAL, QPoint, QTimer, QBasicTimer, QElapsedTimer, QPointF import sys import time class TestGraphicWidget(QGraphicsWidget): def __init__(self,parent=None): super(TestGraphicWidget,self).__init__(parent) self.setWindowFlags(Qt.Window) self.setWindowTitle("Turn Widget") self.resize(400,400) #self.setPos(QPoint(0,0)) self.mousePressed = False def closeEvent(self,event): print "closeclosetest" self.emit(SIGNAL("startTurn")) def mouseMoveEvent(self, event): print "move move" if self.mousePressed: #self.move(self.pos() + event.pos() - self.currentPos) self.setPos(self.pos() + event.pos() - self.currentPos) def mousePressEvent(self, event): if event.buttons() == Qt.LeftButton: self.currentPos = event.pos() self.mousePressed = True class TestMainWindow(QWidget): def __init__(self,parent=None): super(TestMainWindow,self).__init__(parent) #self.setStyleSheet("background: transparent;border:0px;") self.setAttribute(Qt.WA_TranslucentBackground,True) self.firstButton = QPushButton(u"翻转") self.secondButton = QPushButton(u"翻转") self.thirdButton = QPushButton(u"翻转") self.mainLayout = QHBoxLayout(self) self.mainLayout.addWidget(self.firstButton) self.mainLayout.addWidget(self.secondButton) self.mainLayout.addWidget(self.thirdButton) self.connect(self.firstButton, SIGNAL("clicked()"), self.startTurn) self.connect(self.secondButton, SIGNAL("clicked()"), self.startTurn) self.connect(self.thirdButton, SIGNAL("clicked()"), self.startTurn) def startTurn(self): self.emit(SIGNAL("buttonclicked")) def closeEvent(self,event): print "closeclosetest" self.emit(SIGNAL("startTurn")) def paintEvent(self,event): #print "paintevent" painter = QPainter(self) painter.setRenderHint(QPainter.SmoothPixmapTransform, True)#像素光滑 painter.setRenderHint(QPainter.Antialiasing, True)#反锯齿 pix = QPixmap("cloud-bak.jpg").scaled(self.width(),self.height()) painter.setBrush(QBrush(pix)) painter.drawRoundRect(self.rect(),5,5) class TestMainWindowTwo(QWidget): def __init__(self,parent=None): super(TestMainWindowTwo,self).__init__(parent) #self.setStyleSheet("QWidget{background: transparent;border:0px;}") self.setAttribute(Qt.WA_TranslucentBackground,True) self.firstButton = QPushButton(u"p翻转") self.secondButton = QPushButton(u"p翻转") self.thirdButton = QPushButton(u"p翻转") self.mainLayout = QHBoxLayout(self) self.mainLayout.addWidget(self.firstButton) self.mainLayout.addWidget(self.secondButton) self.mainLayout.addWidget(self.thirdButton) self.connect(self.firstButton, SIGNAL("clicked()"), self.startTurn) self.connect(self.secondButton, SIGNAL("clicked()"), self.startTurn) self.connect(self.thirdButton, SIGNAL("clicked()"), self.startTurn) def startTurn(self): self.emit(SIGNAL("buttonclicked")) def paintEvent(self,event): #print "paintevent" painter = QPainter(self) painter.setRenderHint(QPainter.SmoothPixmapTransform, True)#像素光滑 painter.setRenderHint(QPainter.Antialiasing, True)#反锯齿 pix = QPixmap("login.jpg").scaled(self.width(),self.height()) painter.setBrush(QBrush(pix)) painter.drawRoundRect(self.rect(),5,5) class MainWindow(QWidget): def __init__(self,parent=None): super(MainWindow,self).__init__(parent) #self.setStyleSheet("QGraphicsView{background:rgb(0,0,0,0);border:0px;}") self.formflag = 0 self.scene = QGraphicsScene() self.setWindowFlags(Qt.FramelessWindowHint|Qt.WindowStaysOnTopHint) self.setAttribute(Qt.WA_TranslucentBackground,True) #创建部件，并关联它们的信号和槽 self.oneWidget = TestMainWindow() self.connect(self.oneWidget, SIGNAL("buttonclicked"),self.startTurn) self.twoWidget = TestMainWindowTwo() self.connect(self.twoWidget, SIGNAL("buttonclicked"),self.startTurn) #self.textEdit = QGraphicsLayoutItem(self.edit) self.oneTestWidget = self.scene.addWidget(self.oneWidget) self.twoTestWidget = self.scene.addWidget(self.twoWidget) self.form = TestGraphicWidget() self.connect(self.form, SIGNAL("startTurn"),self.close) #将部件添加到布局管理器中 self.layout = QGraphicsLinearLayout(self.form) self.layout.setSpacing(0) self.layout.addItem(self.oneTestWidget) self.layout.addItem(self.twoTestWidget) self.layout.removeItem(self.twoTestWidget) self.twoWidget.hide() #创建图形部件，设置其为一个顶层窗口，然后在其上应用布局 #self.form.setWindowFlags(Qt.Window|Qt.FramelessWindowHint) #self.form.setWindowTitle("Widget Item") #self.form.setLayout(layout) self.scene.addItem(self.form) #self.form.setPos(QPointF(0,0)) #self.form.hide() self.view = QGraphicsView(self.scene,self) #self.view.setScene(self.scene) self.view.setRenderHint(QPainter.Antialiasing) self.view.setViewportUpdateMode(QGraphicsView.BoundingRectViewportUpdate) self.view.resize(QApplication.desktop().width(),QApplication.desktop().height()) self.view.setStyleSheet("background: transparent;border:0px;") self.view.setWindowFlags(Qt.FramelessWindowHint) self.view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff) self.view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) self.view.move(QPoint(0,0)) #self.view.setAttribute(Qt.WA_TranslucentBackground,True) #self.form.resize(500,500) #self.form.setWindowFlags(Qt.FramelessWindowHint) #for(int i=1;i<=360;i++) def setOne(self): self.twoWidget.hide() self.oneWidget.show() self.layout.removeItem(self.twoTestWidget) self.layout.addItem(self.oneTestWidget) self.view.update() def setTwo(self): self.oneWidget.hide() self.twoWidget.show() self.layout.removeItem(self.oneTestWidget) self.layout.addItem(self.twoTestWidget) self.view.update() def transeformT(self,count): r = self.form.boundingRect() for i in range(1,count): print "............." self.form.setTransform(QTransform() .translate(r.width() / 2, r.height() / 2) .rotate(364.00/count*i - 360 * 1, Qt.YAxis) .translate(-r.width() / 2, -r.height() / 2)) self.waitMethod() #self.sleep(1) #time.sleep(1) self.view.update() # def transeformS(self,count): r = self.form.boundingRect() for i in range(1,count): print "............." self.form.setTransform(QTransform() .translate(r.width() / 2, r.height() / 2) .rotate(182.00/count*i - 360 * 1, Qt.YAxis) .translate(-r.width() / 2, -r.height() / 2)) self.waitMethod() self.view.update() def transeformR(self,count): r = self.form.boundingRect() for i in range(1,count): print "............." self.form.setTransform(QTransform() .translate(r.width() / 2, r.height() / 2) .rotate(91.00/count*i - 360 * 1, Qt.YAxis) .translate(-r.width() / 2, -r.height() / 2)) self.waitMethod() self.view.update() self.form.setTransform(QTransform() .translate(r.width() / 2, r.height() / 2) .rotate(270 - 360 * 1, Qt.YAxis) .translate(-r.width() / 2, -r.height() / 2)) self.view.update() if self.formflag %2 == 0: self.setOne() else: self.setTwo() for i in range(1,count): self.form.setTransform(QTransform() .translate(r.width() / 2, r.height() / 2) .rotate(270 + 93.00/count*i - 360 * 1, Qt.YAxis) .translate(-r.width() / 2, -r.height() / 2)) self.waitMethod() self.view.update() def transeformB(self,count): r = self.form.boundingRect() for i in range(1,count): print "............." self.form.setTransform(QTransform() .translate(r.width(), r.height()) .rotate(91.00/count*i - 360 * 1, Qt.YAxis) .translate(-r.width(), -r.height())) self.waitMethod() self.view.update() self.form.setTransform(QTransform() .translate(r.width(), r.height()) .rotate(270 - 360 * 1, Qt.YAxis) .translate(-r.width(), -r.height())) self.view.update() for i in range(1,count): self.form.setTransform(QTransform() .translate(r.width(), r.height()) .rotate(270 + 93.00/count*i - 360 * 1, Qt.YAxis) .translate(-r.width(), -r.height())) self.waitMethod() self.view.update() def transeform(self): print self.form.pos() #self.scene.itemAt(QPointF) rxx = self.scene.itemsBoundingRect() rx = self.form.boundingRect() r = self.form.geometry() print r,rx,rxx for i in range(1,361): print self.form.pos() print "............." #print r.width(),r.height() transform = QTransform() transform.translate(r.width() / 2, r.height()/2)#中心点,原点 transform.rotate(i - 360 * 1, Qt.YAxis)#绕X轴旋转角度 self.form.setTransform(transform) # self.form.setTransform(QTransform() # .translate(r.width() / 2, r.height() / 2) # .rotate(i - 360 * 1, Qt.YAxis) # .translate(-r.width() / 2, -r.height() / 2)) # self.form.setTransform(QTransform() # .translate(250, 250) # .rotate(i - 360 * 1, Qt.YAxis) # .translate(-250, -250)) self.waitMethod() self.view.update() # def startTurn(self): self.formflag += 1 self.transeformR(30) #self.transeform() #self.form.close() #self.view.close() def closeEvent(self,event): print "close" self.form.close() self.view.close() self.close() def sleep(self,msec): dieTime = QTime.currentTime().addMSecs(msec) print dieTime,QTime.currentTime() #a = 0 while( QTime.currentTime() < dieTime ): #print "000000000000" QCoreApplication.processEvents(QEventLoop.AllEvents, 100) def waitMethod(self): tt = QElapsedTimer() tt.start() q = QEventLoop() t = QTimer() t.setSingleShot(True) self.connect(t, SIGNAL("timeout()"), q.quit) t.start(1) # 5s timeout q.exec_() if(t.isActive()): t.stop() else: pass print tt.elapsed() if __name__ == "__main__": app = QApplication(sys.argv) font = QFont() font.setPointSize(16) font.setFamily(("Roman Times")) app.setFont(font) c = MainWindow() c.show() c.move(QPoint(0,0)) app.exec_() 以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。
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