From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tom Tromey <tromey@redhat.com>
To: Keith Seitz <keiths@cygnus.com>
Cc: Insight List <insight@sourceware.cygnus.com>
Subject: Re: Patch: operate-and-get-next
Date: Fri, 28 Sep 2001 10:19:00 -0000
Message-id: <87snd7rzni.fsf@creche.redhat.com>
References: <Pine.GSO.4.33.0109280919240.16046-100000@makita.cygnus.com>
X-SW-Source: 2001-q3/msg00301.html

>>>>> "Keith" == Keith Seitz <keiths@cygnus.com> writes:

Keith> (Try up/down in the console window. It doesn't work properly.)

I looked into this a bit.  It turns out we already have some of the
machinery in place to make it work correctly.  All that remains is
making selected_frame_level_changed_hook do a little more work.

I came up with the appended patch.

Unfortunately, if you try this patch you'll see weird behavior.  When
you first run your program the source window will go through a few
gyrations, first displaying nothing, then briefly (for me anyway)
displaying some assembly, before finally settling on the breakpoint on
main().

I think this is distracting enough to make this patch not acceptable :-(.
I really don't know how to fix it.

(Checking that gdb_selected_frame_level != -1 in
gdbtk_tcl_selected_frame_changed helps, but still doesn't suffice.)

Any ideas?

Tom

Index: ChangeLog
from  Tom Tromey  <tromey@redhat.com>
	* library/stackwin.itb (StackWin::change_frame): Don't call
	gdbtk_update.
	* library/srcwin.itb (SrcWin::stack): Don't call gdbtk_update.
	* generic/gdbtk-hooks.c (gdbtk_selected_frame_changed): Invoke
	gdbtk_tcl_selected_frame_changed.
	* library/interface.tcl (gdbtk_tcl_selected_frame_changed): New
	proc.

Index: generic/gdbtk-hooks.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbtk/generic/gdbtk-hooks.c,v
retrieving revision 1.18
diff -u -r1.18 gdbtk-hooks.c
--- generic/gdbtk-hooks.c 2001/08/16 15:48:14 1.18
+++ generic/gdbtk-hooks.c 2001/09/28 17:10:24
@@ -769,6 +769,7 @@
      int level;
 {
   Tcl_UpdateLinkedVar (gdbtk_interp, "gdb_selected_frame_level");
+  Tcl_GlobalEval (gdbtk_interp, "gdbtk_tcl_selected_frame_changed");
 }
 
 /* Called when the current thread changes. */
Index: library/interface.tcl
===================================================================
RCS file: /cvs/src/src/gdb/gdbtk/library/interface.tcl,v
retrieving revision 1.29
diff -u -r1.29 interface.tcl
--- library/interface.tcl 2001/08/13 18:30:36 1.29
+++ library/interface.tcl 2001/09/28 17:10:25
@@ -1751,3 +1751,8 @@
   GDBEventHandler::dispatch $e
   delete object $e
 }
+
+# The selected frame changed.  Inform the UI.
+proc gdbtk_tcl_selected_frame_changed {} {
+  gdbtk_update
+}
Index: library/srcwin.itb
===================================================================
RCS file: /cvs/src/src/gdb/gdbtk/library/srcwin.itb,v
retrieving revision 1.16
diff -u -r1.16 srcwin.itb
--- library/srcwin.itb 2001/08/24 00:11:06 1.16
+++ library/srcwin.itb 2001/09/28 17:10:26
@@ -480,7 +480,6 @@
   if {[catch {gdb_cmd "$cmd"} message]} {
     dbug E "STACK ERROR: $message"
   }
-  gdbtk_update
   gdbtk_idle
 }
 
Index: library/stackwin.itb
===================================================================
RCS file: /cvs/src/src/gdb/gdbtk/library/stackwin.itb,v
retrieving revision 1.5
diff -u -r1.5 stackwin.itb
--- library/stackwin.itb 2001/08/20 19:14:09 1.5
+++ library/stackwin.itb 2001/09/28 17:10:26
@@ -120,11 +120,6 @@
     set size [$itk_component(slb) size]
     set frame_num [expr {$size - $sel - 1}]
     catch {gdb_cmd "frame $frame_num"}
-    
-    # Run idle hooks and cause all widgets to update
-    set protect_me 1
-    gdbtk_update
-    set protect_me 0
     gdbtk_idle
   }
 }