referencing objects from other classes

[ihatehippies]

I'm fairly new to making GUI's in tk so I downloaded activestates GUI builder from sourceforge. It has a very straightforward drag and drop interface and is easy to pick up. However I ran into a problem trying to edit the widgets it creates. It makes 2 files, the first just initializes the widgets and you are not supposed to edit and the second breaks down every option for the widget you create. You're supposed to be able to edit everything from the second file however I cannot find the right syntax to reference a listbox from file #1 and insert text into it. Here are the files from a simple dialog.

#file #1
import Tkinter
import os # needed for relative image paths

# Using new-style classes: create empty base class object
# for compatibility with older python interps
#if sys.version_info < (2, 2):
#    class object:
#        pass

class Testgui(object):
    _images = [] # Holds image refs to prevent GC
    def __init__(self, root):


        # Widget Initialization
        self.a_listbox = Tkinter.Listbox(root,
            height = 0,
            width = 0,
        )

        # widget commands

        self.a_listbox.configure(
            xscrollcommand = self.a_listbox_xscrollcommand
        )
        self.a_listbox.configure(
            yscrollcommand = self.a_listbox_yscrollcommand
        )


        # Geometry Management
        self.a_listbox.grid(
            in_    = root,
            column = 1,
            row    = 1,
            columnspan = 1,
            ipadx = 0,
            ipady = 0,
            padx = 0,
            pady = 0,
            rowspan = 1,
            sticky = "news"
        )


        # Resize Behavior
        root.grid_rowconfigure(1, weight = 0, minsize = 114, pad = 0)
        root.grid_columnconfigure(1, weight = 0, minsize = 288, pad = 0)

########################################################
#and the second file::::::::::::
from Tkinter import *
from testgui_ui import Testgui

# BEGIN USER CODE global

# END USER CODE global

class CustomTestgui(Testgui):
    pass

    # BEGIN CALLBACK CODE
    # ONLY EDIT CODE INSIDE THE def FUNCTIONS.

    # a_listbox_xscrollcommand --
    #
    # Callback to handle a_listbox widget option -xscrollcommand
    def a_listbox_xscrollcommand(self, *args):
        pass

    # a_listbox_yscrollcommand --
    #
    # Callback to handle a_listbox widget option -yscrollcommand
    def a_listbox_yscrollcommand(self, *args):
        pass

    # END CALLBACK CODE

    # BEGIN USER CODE class

    # END USER CODE class

def main():
    # Standalone Code Initialization
    # DO NOT EDIT
    try: userinit()
    except NameError: pass
    root = Tk()
    demo = CustomTestgui(root)
    root.title('testgui')
    try: run()
    except NameError: pass
    root.protocol('WM_DELETE_WINDOW', root.quit)
    root.mainloop()

if __name__ == '__main__': main()

From the second file how to I edit the widgets created in the first file?
I've tried 'Testgui.a_listbox.insert(0,"whatever")
Testgui._init_.a_listbox.insert(0,"whatever")

I cant figure out how to edit instances created in the former class..
thanks

[jlm699]

I think you may need to use demo.a_listbox.insert(0,"whatever") , since demo is the instance of Testgui.

[ihatehippies]

thanks, makes sense.. any ideas why 'whatever' only shows up after you click the close window button the first time?

def main():
    # Standalone Code Initialization
    # DO NOT EDIT
    try: userinit()
    except NameError: pass
    root = Tk()
    demo = CustomTestgui(root)
    root.title('testgui')
    try: run()
    except NameError: pass
    root.protocol('WM_DELETE_WINDOW', root.quit)
    root.mainloop()
    demo.a_listbox.insert(0,"whatever")

[jlm699]

I'm not versed in Tk but I assume that it's event driven like wx is. That means that in order to have "whatever" appear in the box, you need to bind it to an event.

So anything after root.mainloop() isn't going to happen until you quit the mainloop (ie, close the window, hit CTRL+C, etc)

[ihatehippies]

copy that -thanks