Member Avatar for sangpenakluk

Hello!! I desperately need help on event triggering across panels in wxPython! :(

I have 2 classes that inherit wx.Panel: Leftpanel & Rightpanel
Leftpanel consists of several buttons.
Rightpanel consists of a graph (i.e. using matplotlib).

I want to make the program so that pressing the button on Leftpanel will update(redraw) the graph on Rightpanel. (=event from pressing a button of a panel will trigger another function declared in another panel).

I have googled plenty of resources, but could not find any hints.
Any help would be greatly appreciated! Thanks! :)

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  • Latest Post Latest Post by Stefano Mtangoo
Member Avatar for Stefano Mtangoo

sample code will help explain more. Also search for something like calling one method from another place in this forum.

What I know is you use their common parent as reference (SB can correct me if I'm wrong!)

Member Avatar for sangpenakluk

Thanks for the reply. Here I'm attaching my code.
Explanation:
LeftPanel has a button which if pressed, will call the event handler on_button described in another class (RightPanel).

The question is:
How do you make a program which has one button in a panel(=left panel) which calls to a function in another panel(=right panel)?
The purpose of doing this is that I want to make a program that has 2 panels: one showing only buttons & textboxes and the other one showing a graph. Whenever the user changes a value in boxes/buttons in left panel, the graph in the right panel also changes.

When executing the program below I got an error:
TypeError: unbound method on_button() must be called with RightPanel instance as first argument (got CommandEvent instance instead)

Help would be greatly appreaciated! Thank you guys!:)

import wx

class RightPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent)

    def on_button(self, event):
        self.calculate()

    def calculate(self):
        # Another calculation here
        print 1+1

class LeftPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent)
  
        # A Button
        self.button = wx.Button(self, -1, 'Calculate!')

        # If the button is pressed, call on_button on the other class
        self.Bind(wx.EVT_BUTTON, RightPanel.on_button, self.button)

class Frame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "Testing")
        self.left_panel = LeftPanel(self)
        self.right_panel = RightPanel(self)
        
        # Panel sizer
        self.panelsizer = wx.BoxSizer(wx.HORIZONTAL)
        self.panelsizer.Add(self.left_panel, 0, wx.LEFT | wx.TOP | wx.EXPAND)
        self.panelsizer.Add(self.right_panel, 1, wx.LEFT | wx.TOP | wx.EXPAND)
        self.SetSizer(self.panelsizer)
        self.panelsizer.Fit(self)

if __name__ == '__main__':
    app = wx.PySimpleApp()
    app.frame = Frame()
    app.frame.Show()
    app.MainLoop()
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