pyqt-如何为QLabel类创建点击信号？

Question

我从QLabel创建了一个图像按钮类。现在我想添加一个点击信号。现在，该怎么办？

class PicButton(QLabel): 

    def __init__(self,pixmap1,pixmap2,parent=None): 
     QLabel.__init__(self, parent) 
     self.pic = pixmap1 
     imageSize = self.pic.size() 
     imageSize.setWidth(imageSize.width()*.7) 
     imageSize.setHeight(imageSize.height()*.7) 
     self.pic = self.pic.scaled(imageSize,Qt.KeepAspectRatioByExpanding) 



     self.pic2 = pixmap2 
     imageSize2 = self.pic2.size() 
     imageSize2.setWidth(imageSize2.width()*.7) 
     imageSize2.setHeight(imageSize2.height()*.7) 
     self.pic2 = self.pic2.scaled(imageSize2,Qt.KeepAspectRatioByExpanding) 



    def enterEvent(self, event): 
     self.setPixmap(self.pic2) 
     event.accept() 

    def leaveEvent(self, event): 
     """ When the mouse leave this widget, destroy it. """ 
     self.setPixmap(self.pic) 
     self.destroy() 

我做一个按钮：

ImageButton2 = PicButton(QPixmap("image/buy.png"),QPixmap("image/buy_Hover.png")) 
    ImageButton2.clicked.connect(self.addStuff) # but this class has not clicked signal 

Answer 1

QLabels没有默认clicked信号。如果你想拥有一个，你必须自己发出add it，然后发出正确的事件。

要dectect事件，您可以：

• 覆盖one or more of
  • QLabel.mouseDoubleClickEvent
  • QLabel.mousePressEvent
  • QLabel.mouseReleaseEvent
• install的event filter
• 重写QLabel。 event