如何在 kivy 或 kivymd 中正确使用 on_resize function

Question

In my app i need to call certain function in certain screen when it is resized, and it looks like this

class MainApp(MDApp):
    def on_resize(self):
        if self.manager.get_screen() == "table_screen":   
            if self.width>self.height:
                self.manager.get_screen("table_screen").ids.table_image.source="table1.png"
                self.manager.get_screen("table_screen").ids.left_panel.opacity=0
                print("PAPAPAPPAAPPA")
            else:
                self.ids.left_panel.size_hint_x=.5
                self.ids.left_panel.opacity=1
                print("PAPAPAPPAAPPA")

    def build(self):
        Window.bind(size=self.on_resize)
        return Main()

but when i resize window in any screen, the image shatters and i get an error on_resize() takes 1 positional argument but 3 were given what is the origin of this error? I dont see to give 3 argument anywhere

Answer 1

The origin of the error is that when you bind a function to a property change, it receives three positional arguments. They are self , the instance of the class instance whose property is changing, and the new value of the property.