I have just started learning Python and have moved on to learning
about Tkinter. This is likely to be a very easy question but I have
no idea what is happening here.
I am trying to set up a GUI, separated into several frames. In a
lower frame I have added a Listbox. I want the first item in the
Listbox to be highlighted when the programme starts up. Before adding
the ".selection_set" method, the GUI looked just fine. I used the
propagate method to fix the frame dimensions in my original programme.
However, as soon as call the method: ListboxName.selection_set(0),
the lower frame (containing the Listbox), ends up on the top row,
covering the orginal top frame.
I tried a very small bit of code to replicate the basic elements and
the same happens (see code below):
I am working using a mac and XCode, (cocoa-python project). Just as
an additional point, I have diccovered that running the same programme
through Terminal actually does just fine and displays the windows I
want without a problem.
Thanks in advance for any help with this
Dave
Here's the experiment:
from Tkinter import *
class Application():
def __init__(self, master):
frame1 = Frame(master)
frame1.grid()
frame2 = Frame(master)
frame2.grid()
bttn = Button(frame1)
bttn.grid()
list = Listbox(frame2)
list.grid()
list.insert(END,"What's happening")
list.selection_set(0)
root = Tk()
app = Application(root)
root.mainloop()
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