Inheretance callbacks dosen't work. Theoretically it should work. please help!

[MariwanJ]

@luzpaz @carlopav @joelgraff Please look at the devbranch - main has not the updates yet. For the widget system I am preparing, I let the user write the callback for the mouse events later by sub-classing the widgets. But when I subclass the line_widget in the smartscale, the callback is still the parents callback. There is no reason to be like that as I am overriding the variable. If it was cpp, it shouldn't happen but in python either I don't know or it is not easy to implement. I would appreciate any help in understanding or fixing this issue. Thank you very much in advance. look at this part.

def lblcallback(userData=None):
    """
            This function will run the label-changed 
            event callback.
    """
        #TODO : Subclass this and impalement the callback 
        #          to get the desired effect
    print("dummy line-widget-label callback")

def callback(userData=None):
    """
            This function will run the when the line is clicked 
            event callback. 
    """
        #TODO : Subclass this and impalement the callback 
        #          to get the desired effect
    print("dummy line-widget callback" )

class Fr_Line_Widget(fr_widget.Fr_Widget):

    """
    This class is for drawing a line in coin3D world
    """

    def __init__(self, vectors: List[App.Vector] = [], label: str = "", lineWidth=1):
        self.w_lineWidth = lineWidth  # Default line width
        self.w_widgetType = constant.FR_WidgetType.FR_EDGE

        self.w_callback_=callback           #External function                      <---- this is not overriding the function
        self.w_lbl_calback_=lblcallback     #External function                    <---- this is not overriding the function
        self.w_KB_callback_=KBcallback      #External function
        self.w_move_callback_=movecallback  #External function
        super().__init__(vectors, label)

[luzpaz]

@realthunder can you take a quick look at this?

[MariwanJ]

@luzpaz I believe the solution is as I asked at stackoverflow. (https://stackoverflow.com/questions/67877603/how-to-override-a-function-in-an-inheritance-hierarchy#67877671) I will try to do the modifications required as per the solution they told me there.

[MariwanJ]

This issue is resolved .. Thanks for @luzpaz. I managed to figure out the issue as I mentioned in the previous post.