[Tile-dev] Bug with TkAqua, panedwindow and ::ttk::notebook

[Alastair D. <ala...@si...>]

The following script (and instructions) shows up a problem on MacOS X =
(only)
with using the panedwindow and Tile notebook widgets.  Items drawn on a
canvas within a panedwindow on a notebook tab are often visible, even if =
the
tab is not selected.

I _think_ the culprit here is the panedwindow widget on TkAqua, since we
have seen similar behaviour using the BWidget notebook, as well as the =
Tile
notebook, but I can't say for sure. (The Tile notebook is such a HUGE
improvement, we switched as soon as we could!)

Source the following script from Wish Shell (either using the Terminal =
or
the Console, it doesn't matter):
=20
package require tile
ttk::notebook .n
pack .n
panedwindow .n.p1
.n add .n.p1 -text "Here be p1"
frame .n.p1.f -width 300 -height 300
.n.p1 add .n.p1.f -sticky nesw
pack [canvas .n.p1.f.c] -fill both -expand true
.n.p1.f.c create rect 40 50 80 90
panedwindow .n.p2
.n add .n.p2 -text "I am p2"
frame .n.p2.f -width 300 -height 300
.n.p2 add .n.p2.f -sticky nesw
pack [canvas .n.p2.f.c] -fill both -expand true
.n.p2.f.c create rect 60 70 100 110

Now shuffle the notebook tabs up and down, leave p1 uppermost and enter =
the
command

.n.p2.f.c create oval 120 120 140 150

The oval is visible, apparently on p1, despite being drawn on p2.  =
Shuffling
the pages again will correct the situation.

In our application, we plot results to several notebook pages
simultaneously, so we see this a lot. Any advice would be much =
appreciated.
I'll file a bug if confirmed.

Kind regards,
Alastair