[Tcl-bugs] [ tktoolkit-Bugs-2264732 ] ttk themed widget X11 visual crash & patch

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Bugs item #2264732, was opened at 2008-11-11 21:20
Message generated for change (Settings changed) made by cjmcdonald
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Category: 88. Themed Tk
Group: None
Status: Open
Resolution: None
>Priority: 8
Private: No
Submitted By: Colin McDonald (cjmcdonald)
Assigned to: Joe English (jenglish)
Summary: ttk themed widget X11 visual crash & patch

Initial Comment:
Using ttk widgets in a wish toplevel which has
a different X11 visual to the screen root window
crashes.

E.g. on a system with a 24-bit truecolor root
window, which also supports 8-bit pseudocolor:

% wish8.5 -visual "pseudocolor 8"
  ttk::label .l -text test
  pack .l

crashes with:

X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 70 (X_PolyFillRectangle)
Serial number of failed request: 82
Current serial number in output stream: 83

The problem is in the double buffering code in
ttkWidget.c,routine BeginDrawing(). It creates
a pixmap with depth:

	DefaultDepthOfScreen(Tk_Screen(tkwin))

which should simply be replaced with

	Tk_Depth(tkwin)

An updated ttkWidget.c from CVS head revision 1.16
is attached.  The same fix can be applied to the
8.5.* series.

Searching the bug tracker, this appears to be
identical to the tk panedwindow bug #671122
in 2003.


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