python之PyQt按钮右键菜单功能的实现代码

self.setStyleSheet("QMenu{background:purple;}"              "QMenu{border:1px solid lightgray;}"              "QMenu{border-color:green;}"              "QMenu::item{padding:0px 40px 0px 20px;}"              "QMenu::item{height:30px;}"                "QMenu::item{color:blue;}"              "QMenu::item{background:white;}"              "QMenu::item{margin:1px 0px 0px 0px;}"              "QMenu::item:selected:enabled{background:lightgray;}"              "QMenu::item:selected:enabled{color:white;}"                "QMenu::item:selected:!enabled{background:transparent;}"              "QMenu::separator{height:50px;}"              "QMenu::separator{width:1px;}"              "QMenu::separator{background:white;}"              "QMenu::separator{margin:1px 1px 1px 1px;}"                "QMenu#menu{background:white;}"              "QMenu#menu{border:1px solid lightgray;}"              "QMenu#menu::item{padding:0px 40px 0px 30px;}"              "QMenu#menu::item{height:25px;}"              "QMenu#menu::item:selected:enabled{background:lightgray;}"              "QMenu#menu::item:selected:enabled{color:white;}"              "QMenu#menu::item:selected:!enabled{background:transparent;}"              "QMenu#menu::separator{height:1px;}"              "QMenu#menu::separator{background:lightgray;}"              "QMenu#menu::separator{margin:2px 0px 2px 0px;}"              "QMenu#menu::indicator {padding:10px;}"                            )

def createContextMenu(self):     '''''     创建右键菜单     '''     # 必须将ContextMenuPolicy设置为Qt.CustomContextMenu     # 否则无法使用customContextMenuRequested信号     self.setContextMenuPolicy(Qt.CustomContextMenu)     self.customContextMenuRequested.connect(self.showContextMenu)     # 创建QMenu     self.contextMenu = QMenu(self)     self.actionA = self.contextMenu.addAction(QIcon("images/0.png"),u'| 动作A')     self.actionB = self.contextMenu.addAction(QIcon("images/0.png"),u'| 动作B')     self.actionC = self.contextMenu.addAction(QIcon("images/0.png"),u'| 动作C')     #添加二级菜单    self.second = self.contextMenu.addMenu(QIcon("images/0.png"),u"| 二级菜单")     self.actionD = self.second.addAction(QIcon("images/0.png"),u'| 动作A')    self.actionE = self.second.addAction(QIcon("images/0.png"),u'| 动作B')    self.actionF = self.second.addAction(QIcon("images/0.png"),u'| 动作C')    # 将动作与处理函数相关联     # 这里为了简单，将所有action与同一个处理函数相关联，     # 当然也可以将他们分别与不同函数关联，实现不同的功能     self.actionA.triggered.connect(self.actionHandler)     self.actionB.triggered.connect(self.actionHandler)     self.actionC.triggered.connect(self.actionHandler)     self.actionD.triggered.connect(self.actionHandler)     self.actionE.triggered.connect(self.actionHandler)     self.actionF.triggered.connect(self.actionHandler) 

mybutton.py# -*- coding: utf-8 -*- from PyQt4.QtCore import Qt, QRectfrom PyQt4.QtGui import QPushButton, QPainter, QPainterPath, QPen, QColor, QPixmap, QIcon, QBrush, QCursor,QMenuclass MenuButton(QPushButton):  def __init__(self,parent = None):    super(MenuButton,self).__init__(parent)    self.setStyleSheet("QMenu{background:purple;}"              "QMenu{border:1px solid lightgray;}"              "QMenu{border-color:green;}"              "QMenu::item{padding:0px 40px 0px 20px;}"              "QMenu::item{height:30px;}"                "QMenu::item{color:blue;}"              "QMenu::item{background:white;}"              "QMenu::item{margin:1px 0px 0px 0px;}"              "QMenu::item:selected:enabled{background:lightgray;}"              "QMenu::item:selected:enabled{color:white;}"                "QMenu::item:selected:!enabled{background:transparent;}"              "QMenu::separator{height:50px;}"              "QMenu::separator{width:1px;}"              "QMenu::separator{background:white;}"              "QMenu::separator{margin:1px 1px 1px 1px;}"                "QMenu#menu{background:white;}"              "QMenu#menu{border:1px solid lightgray;}"              "QMenu#menu::item{padding:0px 40px 0px 30px;}"              "QMenu#menu::item{height:25px;}"              "QMenu#menu::item:selected:enabled{background:lightgray;}"              "QMenu#menu::item:selected:enabled{color:white;}"              "QMenu#menu::item:selected:!enabled{background:transparent;}"              "QMenu#menu::separator{height:1px;}"              "QMenu#menu::separator{background:lightgray;}"              "QMenu#menu::separator{margin:2px 0px 2px 0px;}"              "QMenu#menu::indicator {padding:10px;}"                            )    self.hovered = False    self.pressed = False    self.pressedIcon = QIcon()    self.color = QColor(Qt.gray)    self.opacity = 1.0    self.count = 0#     self.setAutoFillBackground(True)#     self.setStyleSheet("#Check {background-color: rgb(255, 255, 255);}");    self.createContextMenu()     self.count = 0  def createContextMenu(self):     '''''               创建右键菜单     '''     # 必须将ContextMenuPolicy设置为Qt.CustomContextMenu     # 否则无法使用customContextMenuRequested信号     self.setContextMenuPolicy(Qt.CustomContextMenu)     self.customContextMenuRequested.connect(self.showContextMenu)     # 创建QMenu     self.contextMenu = QMenu(self)     self.actionA = self.contextMenu.addAction(QIcon("images/0.png"),u'| 动作A')     self.actionB = self.contextMenu.addAction(QIcon("images/0.png"),u'| 动作B')     self.actionC = self.contextMenu.addAction(QIcon("images/0.png"),u'| 动作C')     #添加二级菜单    self.second = self.contextMenu.addMenu(QIcon("images/0.png"),u"| 二级菜单")     self.actionD = self.second.addAction(QIcon("images/0.png"),u'| 动作A')    self.actionE = self.second.addAction(QIcon("images/0.png"),u'| 动作B')    self.actionF = self.second.addAction(QIcon("images/0.png"),u'| 动作C')    # 将动作与处理函数相关联     # 这里为了简单，将所有action与同一个处理函数相关联，     # 当然也可以将他们分别与不同函数关联，实现不同的功能     self.actionA.triggered.connect(self.actionHandler)     self.actionB.triggered.connect(self.actionHandler)     self.actionC.triggered.connect(self.actionHandler)     self.actionD.triggered.connect(self.actionHandler)     self.actionE.triggered.connect(self.actionHandler)     self.actionF.triggered.connect(self.actionHandler)    def showContextMenu(self, pos):     '''''     右键点击时调用的函数     '''     self.count+=1    # 菜单显示前，将它移动到鼠标点击的位置     self.contextMenu.exec_(QCursor.pos()) #在鼠标位置显示    #self.contextMenu.show()     print self.count  def actionHandler(self):     '''''     菜单中的具体action调用的函数     '''     if self.count%3==1:      self.setText(u"first")    elif self.count%3==2:      self.setText(u"second")    elif self.count%3==0:      self.setText(u"third")  def setEnterCursorType(self, Type):    self.cursorType = Type  def setColor(self,color):    self.color = color  def setOpacitys(self,opacity):    self.opacity = opacity#     self.setOpacity(0.5)  def enterEvent(self,event):    self.hovered = True    self.repaint()    QPushButton.enterEvent(self,event)  def leaveEvent(self,event):    self.hovered = False    self.repaint()    self.setCursor(QCursor(Qt.ArrowCursor))     QPushButton.leaveEvent(self,event)  def mousePressEvent(self, event):    self.pressed = True    self.repaint()    QPushButton.mousePressEvent(self,event)  def mouseReleaseEvent(self, event):    self.pressed = False    self.repaint()    QPushButton.mouseReleaseEvent(self,event)  def paintEvent(self,event):    painter = QPainter(self)    btnRect = self.geometry()    iconRect = self.iconSize()    color = QColor(Qt.black)    if self.hovered:      color = self.color    if self.pressed:      color = self.color.darker(120)    painter.setPen(QPen(QColor(Qt.lightGray),2))    outline = QPainterPath()    outline.addRoundedRect(0, 0, btnRect.width(), btnRect.height(), 0, 0)    painter.setOpacity(1)    painter.drawPath(outline)    painter.setBrush(QBrush(color))     painter.setOpacity(self.opacity)    painter_path = QPainterPath()    painter_path.addRoundedRect(1, 1, btnRect.width() - 2, btnRect.height() - 2, 0, 0)    if self.hovered:      painter.setClipPath(painter_path)      painter.drawRoundedRect(1, 1, btnRect.width() - 2, btnRect.height() - 2, 0, 0)    painter.setOpacity(1)        iconPos,textPos = self.calIconTextPos(btnRect, iconRect)    # 重画文本    if not self.text().isNull():      painter.setFont(self.font())      painter.setPen(QPen(QColor(Qt.black),2))      painter.drawText(textPos.x(), textPos.y(), textPos.width(), textPos.height(), Qt.AlignCenter, self.text())      # 重画图标    if not self.icon().isNull():      painter.drawPixmap(iconPos, QPixmap(self.icon().pixmap(self.iconSize())))  # 计算图标和文本大小位置  def calIconTextPos(self,btnSize,iconSize):    if self.text().isNull():      iconWidth = iconSize.width()*3/5      iconHeight = iconSize.height()*3/5    else:      iconWidth = iconSize.width()      iconHeight = iconSize.height() - 50    iconX = (btnSize.width()-iconWidth)/2    iconY = (btnSize.height()-iconHeight)/2    iconPos = QRect()    iconPos.setX(iconX)    iconPos.setY(iconY)    iconPos.setWidth(iconWidth)    iconPos.setHeight(iconHeight)    textPos = QRect()    if not self.text().isNull():      textPos.setX(iconX)      textPos.setY(btnSize.height()- 50)      textPos.setWidth(iconWidth)      textPos.setHeight(50)    return (iconPos,textPos)1buttontest.py# -*- coding: utf-8 -*- from mybutton import MenuButtonimport sysfrom PyQt4.QtCore import QTextCodec, QSize, SIGNALfrom PyQt4.QtGui import QDialog, QIcon, QHBoxLayout, QApplicationQTextCodec.setCodecForTr(QTextCodec.codecForName("utf8"))class TestDialog(QDialog):  def __init__(self,parent=None):    super(TestDialog,self).__init__(parent)    self.setFixedSize(200,200)    self.firMybutton = MenuButton()    self.firMybutton.setFixedSize(QSize(100,100))    self.firMybutton.setIcon(QIcon("windows.png"))    self.firMybutton.setIconSize(QSize(100,100))    #self.firMybutton.setText(self.tr("确萨"))    self.connect(self.firMybutton, SIGNAL("clicked()"),self.cancel)    myLayout = QHBoxLayout()    myLayout.addWidget(self.firMybutton)    self.setLayout(myLayout)  def cancel(self):    self.close()app=QApplication(sys.argv)dialog=TestDialog()dialog.show()app.exec_()