1 给窗口加过滤器

  1.     def init_wnd(self):    
  2.         self.installEventFilter(self)  # 1 安装事件过滤器
  4.     # 2 重写事件过滤器, 所有的事件都会走这里经过
  5.     def eventFilter(self, obj: QObject, event: QEvent) -> bool:
  6.         print(obj, event)
  7.         if obj is self:
  8.             if event.type() == QEvent.MouseButtonPress:
  9.                 print("鼠标按下")
  10.             elif event.type() == QEvent.MouseButtonRelease:
  11.                 print("鼠标释放")
  12.             elif event.type() == QEvent.MouseMove:
  13.                 print("鼠标移动")
  14.         return super(WndClientLogin, self).eventFilter(obj, event)

2 给控件加过滤器

  1.     def __init__(self):    
  2.         self.lbe_captcha_pic.installEventFilter(self)  # 给验证码标签安装事件过滤器
  5.     def eventFilter(self, obj: QObject, ev: QEvent):
  6.         if obj is self.lbe_captcha_pic:
  7.             ev_type = ev.type()
  8.             if ev_type == QEvent.MouseButtonPress or ev_type == QEvent.KeyPress:
  9.                 self.popup_captcha_wnd()
  10.                 self.show_info("验证码已刷新")
  11.         return super().eventFilter(obj, ev)