Python/Tk GUI

ash.shuklaa · #1 30-Aug-2006, 08:22

Hi,

I am making a GUI with the help of python. The problem is that when I destroy a certain frame the data structure assciated with it, does'nt change. Can anybody offer any help on this?

I have attached the program and it would be great if anybody can offer some useful suggestions.

crystalattice · #2 30-Aug-2006, 12:56

Well, I get the following error when I click the "Add" button. Do you?

Quote:

File 'temp.py', line 58, in delete_frame
del frame_2.sub_frame[str(temp)]
TypeError: list indices must be integers

Basically what's happening with this error is that this line

Quote:

del frame_2.sub_frame[str(temp)]

is trying to make a list but you're casting the temp value into a string and Python doesn't like that, at least how it's implemented here.

What exactly is this program supposed to be doing?

ash.shuklaa · #3 30-Aug-2006, 13:45

Hi,

I apologise for posting the file I was playing with, I am attaching the program in working condition and when u press the "ADD" button new frames will build up and when u press "delete button those frames will be destroyed ". My problem is that these frames only get destroyed in Tk not in python's data structure.

Kindly try again.

Regards
Ash
-------------------------------------------------------------------------

Python Code:

#!/usr/bin/python
from Tkinter import*

class Frame_1(LabelFrame):
    def __init__(self,master):
        LabelFrame.__init__(self,master)
        self.configure(text="Frame1")
        self.grid()     
        
    def control_buttons(self,frame):
        Button( self, text = "Add", command = frame.add_button ).grid( ) 
        Button( self, text = "Read", command = frame.read_button ).grid()
        
class Frame_2(LabelFrame):
    def __init__(self,master):
        LabelFrame.__init__(self,master)
        self.configure(text ="Frame2")
        self.grid()
        self.sub_frame = []
        
    def add_button(self):        
        new_frame = Frame_2_1(self)
       # new_frame.grid()        
        new_frame.populate()
        self.sub_frame.append(new_frame)
      #  print self.sub_frame
        
    def read_button(self):
        print "#"*10 
        for sub_frame in self.sub_frame :
            print "-"*30
            print "band:"+ sub_frame.band.get()
            print "channel:" + sub_frame.channel.get()
            
class Frame_2_1(LabelFrame):
    def __init__(self,tkmaster):
        LabelFrame.__init__(self,tkmaster)
        self.configure(text ="DEFAULT")
        self.grid()
        
    def populate(self): 
        self.band = StringVar()
        self.band.set("900")
        option = OptionMenu(self, self.band,"900","1800","1900" ).grid()
     
        self.channel = StringVar()
        self.channel.set("CS 1") 
        option = OptionMenu(self,self.channel,"CS 1","CS 2","CS 3","CS 4").grid( )

        global temp
        temp= temp+1
        Button(self,text = "Remove"+ str(temp),command= self.delete_frame).grid()

    
    def delete_frame(self):
        self.destroy()
        
root = Tk()
temp=-1
# Create frame 1
frame_1 =  Frame_1(root)
# Create frame 2 
frame_2 = Frame_2(root)

frame_1.control_buttons(frame_2)  
root.mainloop()

--------------------------------------------------------------------------
attachments weren't working

Quote:

Originally Posted by crystalattice

Well, I get the following error when I click the "Add" button. Do you?

Basically what's happening with this error is that this line is trying to make a list but you're casting the temp value into a string and Python doesn't like that, at least how it's implemented here.

What exactly is this program supposed to be doing?

crystalattice · #4 31-Aug-2006, 14:06

Not to sound lazy, but could you try again using [py][/py] around your code? It will keep the indents in your code (plus highlight it appropriately). I tried working with your code but I'm not sure where the indents are supposed to be.

crystalattice · #5 31-Aug-2006, 14:23

Thanks for the fix, cable buddy.

Ash, try adding

Python Code:

self.channel.set("")
self.band.set("")

to your delete_frame method. I'm not sure if it's what you want, but it keeps the data from being written out when you close the frames.

ash.shuklaa · #6 01-Sep-2006, 10:34

Thanks crystal but that doesnt solve the purpose.

I need to alter the list (sub_frame).

It might mean that I need to develop my data structure from scratch every time i press "remove"

crystalattice · #7 02-Sep-2006, 11:49

I'm confused. If I'm reading your code correctly, every time the "ADD" button is pressed a new frame is added to the sub_frame list. Each sub_frame then has the band and channel choices available.

Now, when the sub_frame is removed, do you want to keep the data that sub_frame and print it out or do you want the data deleted along w/ the frame?

ash.shuklaa · #8 02-Sep-2006, 12:12

When the sub_frame is removed (destroyed), I want the data associated with it destroyed as well [which I think means updating that sub_frame list.]

Thanks for the help.

Quote:

Originally Posted by crystalattice

I'm confused. If I'm reading your code correctly, every time the "ADD" button is pressed a new frame is added to the sub_frame list. Each sub_frame then has the band and channel choices available.

Now, when the sub_frame is removed, do you want to keep the data that sub_frame and print it out or do you want the data deleted along w/ the frame?

crystalattice · #9 02-Sep-2006, 17:33

Well, I'd imagine that you need to do something directly to the sub_frame when you call delete_frame. I'm not sure what you may want to do, but you could slice off the last entry, use the del method, or another way to remove the entries from the list.

ash.shuklaa · #10 02-Sep-2006, 18:21

Quote:

Originally Posted by crystalattice

Well, I'd imagine that you need to do something directly to the sub_frame when you call delete_frame. I'm not sure what you may want to do, but you could slice off the last entry, use the del method, or another way to remove the entries from the list.

thats the problem, i need to keep a trace of pointers. It is possible with if I can somehow relate every delete method back to its pointer and than update list. For that I assume i need to add arguements to my object to trace it....how i am gonna do it...thats what i dont know

thanks for the help....

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