Tk Source Code

Please test the following script:

pack [panedwindow .pw -width 400 -height 400 -orient vertical]
set a [frame .a -background green]
set b [frame .b -background orange]
.pw add .a
.pw add .b
.pw paneconfigure .a -height 200
.pw paneconfigure .b -height 200

Both panes .a and .b are configured with height 200, but .a has height 0, and .b has height 400. This result is unexpected. If I configure the height while adding the panes then it works:

pack [panedwindow .pw -width 400 -height 400 -orient vertical]
set a [frame .a -background green]
set b [frame .b -background orange]
.pw add .a -height 200
.pw add .b -height 200

But the configuring of the panes should also work after the panedwindow has been created.

Merged to core-8-6-branch and trunk, and closing, then. Thanks for the feedback.

This fix looks very good. Many thanks!

I have proposed a fix, see [e11514a75c]

The test suite for panedwindow still passes 100% OK.

I've found out that the following work-around works:

pack [panedwindow .pw -width 400 -height 400 -orient vertical]
set a [frame .a -background green]
set b [frame .b -background orange]
.pw add .a
.pw add .b
.pw paneconfigure .a -height 200 -stretch always
.pw paneconfigure .b -height 200 -stretch always
# reset to default
.pw paneconfigure .a -stretch last
.pw paneconfigure .b -stretch last

Nevertheless the behaviour of paneconfigure is unexpected, because work-arounds have to be used. Actually the stretch option should only infect the resizing behaviour via the sash (GUI), but not when paneconfigure is used, because the latter case is causing asymmetric behaviour, and this is not transparent for the user. Moreover the current behaviour is not conform to the documentation:

height size

Specify a height for the window. The height will be the outer dimension of the window including its border, if any. If size is an empty string, or if -height is not specified, then the height requested internally by the window will be used initially; the height may later be adjusted by the movement of sashes in the panedwindow. Size may be any value accepted by Tk_GetPixels.