__init__.py 文件源码

def _event_button(self, ev):
        x = ev.xbutton.x
        y = self.height - ev.xbutton.y
        button = 1 << (ev.xbutton.button - 1)  # 1, 2, 3 -> 1, 2, 4
        modifiers = self._translate_modifiers(ev.xbutton.state)
        if ev.type == xlib.ButtonPress:
            # override_redirect issue: manually activate this window if
            # fullscreen.
            if self._override_redirect and not self._active:
                self.activate()

            if ev.xbutton.button == 4:
                self.dispatch_event('on_mouse_scroll', x, y, 0, 1)
            elif ev.xbutton.button == 5:
                self.dispatch_event('on_mouse_scroll', x, y, 0, -1)
            elif ev.xbutton.button < len(self._mouse_buttons):
                self._mouse_buttons[ev.xbutton.button] = True
                self.dispatch_event('on_mouse_press', 
                    x, y, button, modifiers)
        else:
            if ev.xbutton.button < 4:
                self._mouse_buttons[ev.xbutton.button] = False
                self.dispatch_event('on_mouse_release', 
                    x, y, button, modifiers)