Iwidgets Bugs item #1578846, was opened at 2006-10-17 11:11
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Category: ScrolledXXX
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Colin Hogben (chogben)
Assigned to: Chad Smith (smithc)
Summary: dynamic scrollbar behaviour incorrect/strange

Initial Comment:
The attached script demonstrates unexpected and frankly
strange behaviour.

It creates a scrolledframe then lets the user pack
different sized labels within the child frame.

Start the program.  The window contains the
scolledframe at the top and four buttons beneath.

Click "small" - red "x" appears with no scroll bars;
now click "tall" - a tall green label appears instead
with a vertical scroll bar because it is taller than
the frame.  All OK so far.

Now click "small" again - the red "x" reappears, but
the vertical scroll bar is still there (BUG 1).  I
expect it to disappear because it is no longer needed.

The vertical scroll bar can now be dragged up and the
red "x" moved down within its frame (BUG 2).  I expect
not to be able to drag a scroll bar when there is no
gap at either end (of course it should not be shown
anyway).

Resize the toplevel window to reduce its height
slightly.  The vertical scroll bar is still there.
Try to drag scroll bar up again - it vanishes (BUG 3).
I don't expect things to vanish suddenly.

Click "tall" - vertical scoll bar reappears, but with
the slider sunken despite not having focus (BUG 4).

Of course, bugs 2,3,4 may be knock-on effects from bug 1.

Versions etc.:
Tcl 8.4
Iwidgets 4.0.2
Running on Solaris (X window system)


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