Re: notebook+scale strange behaviour....

  "nicolas" <sl1200mk2@gmail.com>,
  In a message on 30 Jul 2005 06:42:05 -0700, wrote :

"> i've tried to pack the scale in a canvas with a scrollbar, and the
"> strange behaviour appears.
">
"> if there is no scrollbar, the behaviour is normal.
">
"> so it's not a notebook problem.
"> does anybody know why this appear.....

If you want to use a canvas as a 'scrolling' window, you don't *pack*
(or grid or place) windows in it. Instead you create a window item:

canvas .c
scale .c.s

.c create window 0 0 -window .c.s

Then, you need to update the scrollregion of the canvas:

.c configure -scrollregion [.c bbox all]

It is also possible to 'layer' things using a frame widget -- more
complicated to set up, but easier once set up:

canvas .c
frame .c.f

.c create window 0 0 -window .c.f
bind .c.f <Configure> {ConfigureScrollwindow %W %h %w}

proc ConfigureScrollwindow {frame height width} {
  set canvas [winfo parent $frame]

  $canvas configure -scrollregion [$canvas bbox all]
}

scale .c.f.s

pack .c.f.s

(I *think* this will work -- I've not tested it.)

OR you can use the tixScrolledWindow widget, which uses a frame, but
does its own geometry management to handle the scrollbars.

">
">

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Robert Heller ||InterNet: heller@cs.umass.edu
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Received on Thu Sep 29 14:28:03 2005