class - pyqt-如何为 QLabel 类创建点击信号？

Question

我已经从 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()

我做了一个按钮:

  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 没有默认的clicked 信号。如果你想拥有一个，你必须add it你自己并在正确的事件上发出它。

要检测该事件，您可以:

• 覆盖one or more of
  • QLabel.mouseDoubleClickEvent
  • QLabel.mousePressEvent
  • QLabel.mouseReleaseEvent
• install一个event filter
• 覆盖 QLabel。 event