Hi,
On Tue, 15 Sep 2009 13:48:50 -0400
Bradley Hintze <bradle...@aggiemail.usu.edu> wrote:
> I am trying to make a scrollable canvas in the horizontal direction
> but I am having a difficult time. I get the whole scroll bar and can
> scroll using the arrows on the ends of the scroll bar but the actual
> bar (the slider bar) takes up the whole scrollbar area as if there is
> nothing to scroll. Thus, the slider bar cannot be used to scroll. (It
> may be easier to understand if you just run the snipit of code) I am
> wondering how I can fix this.
> Here is my code:
>
> from Tkinter import *
> from tkFileDialog import *
> import os
> class analyze_notes:
>
> def __init__(self):
> string=''
> for i in range(0,100):string=string+' '+str(i)
> self.comp_1=Tk()
> self.comp_1.title('Try')
> l1=Label(self.comp_1, text='Try canvas').grid()
> c1_xscroll=Scrollbar(self.comp_1, orient=HORIZONTAL)
> c1_xscroll.grid(row=2, sticky=E+W+N)
> c1=Canvas(self.comp_1, height=150, width=400, relief=SUNKEN,
> xscrollcommand=c1_xscroll.set)
> c1.grid(row=1)
> c1_xscroll.config(command=c1.xview)
> self.topic_label = Label(c1, text=string, font=('courier',10),
> bg='white')
> c1.create_window(0, 50, window=self.topic_label, anchor=NW)
> self.comp_1.mainloop()
>
> r=analyze_notes()
>
You did not define the Canvases scrollregion; this must be a 4-tuple
(x0, y0, x1, y1) defining the part of the canvas that should be
accessible through the scrollbars. In your case it should be fine to
add a line
c1.configure(scrollregion=c1.bbox('all'))
to your code right before the call to mainloop() .
Please note that you might have to update the widget's scrollregion
each time the canvases contents are changed.
HTH
Michael
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