From 8278d251af0c9b3fbf23878579bac7698bfe565d Mon Sep 17 00:00:00 2001
From: hobbs <hobbs>
Date: Sat, 18 Sep 2004 23:59:46 +0000
Subject: 	(UpdateWrapper): don't adjust Z order of TOPMOST window. 
 (WmAttributesCmd): don't call UpdateWrapper for -disabled or 	-toolwindow
 attr changes.

---
 ChangeLog     |  3 +++
 win/tkWinWm.c | 40 ++++++++++++++++++++++++++++------------
 2 files changed, 31 insertions(+), 12 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 8aadf35..a1211be 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,9 @@
 
 	* win/tkWinWm.c (WmAttributesCmd): correct -alpha 0.0/1.0 setting
 	and round the value.
+	(UpdateWrapper): don't adjust Z order of TOPMOST window.
+	(WmAttributesCmd): don't call UpdateWrapper for -disabled or
+	-toolwindow attr changes.
 
 2004-09-18  Daniel Steffen  <das@users.sourceforge.net>
 
diff --git a/win/tkWinWm.c b/win/tkWinWm.c
index 6b7305a..d60cf26 100644
--- a/win/tkWinWm.c
+++ b/win/tkWinWm.c
@@ -12,7 +12,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkWinWm.c,v 1.54.2.9 2004/09/18 22:48:55 hobbs Exp $
+ * RCS: @(#) $Id: tkWinWm.c,v 1.54.2.10 2004/09/18 23:59:48 hobbs Exp $
  */
 
 #include "tkWinInt.h"
@@ -2103,9 +2103,11 @@ UpdateWrapper(winPtr)
 
 	TkInstallFrameMenu((Tk_Window) winPtr);
 
-	if (oldWrapper && (oldWrapper != wmPtr->wrapper)) {
+	if (oldWrapper && (oldWrapper != wmPtr->wrapper)
+		&& !(wmPtr->exStyle & WS_EX_TOPMOST)) {
 	    /*
 	     * We will adjust wrapper to have the same Z order as oldWrapper
+	     * if it isn't a TOPMOST window.
 	     */
 	    nextHWND = GetNextWindow(oldWrapper, GW_HWNDPREV);
 	}
@@ -2942,7 +2944,8 @@ WmAttributesCmd(tkwin, winPtr, interp, objc, objv)
 	    }
 	} else {
 	    if ((i < objc-1) &&
-		    (Tcl_GetBooleanFromObj(interp, objv[i+1], &boolean) != TCL_OK)) {
+		    (Tcl_GetBooleanFromObj(interp, objv[i+1], &boolean)
+			    != TCL_OK)) {
 		return TCL_ERROR;
 	    }
 	    if (i == objc-1) {
@@ -2956,17 +2959,30 @@ WmAttributesCmd(tkwin, winPtr, interp, objc, objv)
 	}
     }
     if ((wmPtr->styleConfig != style) || (wmPtr->exStyleConfig != exStyle)) {
-	wmPtr->styleConfig = style;
-	wmPtr->exStyleConfig = exStyle;
 	/*
-	 * We could possibly avoid the UpdateWrapper with a SetWindowPos call
-	 * with SWP_FRAMECHANGED, but we need to handle the current styles
-	 * and the Config styles together.
-	SetWindowPos(wmPtr->wrapper, NULL, 0, 0, 0, 0,
-		SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE|SWP_NOSENDCHANGING
-		|SWP_NOZORDER|SWP_FRAMECHANGED);
+	 * Only the change of TOPMOST or LAYERED bits require UpdateWrapper.
+	 * Using SetWindowPos prevents the toplevel "blink", but requires the
+	 * current style info, as *Config only contains a few configurable
+	 * bits which changed.
 	 */
-	UpdateWrapper(winPtr);
+	if ((wmPtr->exStyleConfig ^ exStyle) & (WS_EX_TOPMOST|WS_EX_LAYERED)) {
+	    wmPtr->styleConfig = style;
+	    wmPtr->exStyleConfig = exStyle;
+	    UpdateWrapper(winPtr);
+	} else {
+	    LONG curStyle, curExStyle;
+	    curExStyle = (LONG) GetWindowLongPtr(wmPtr->wrapper, GWL_EXSTYLE);
+	    curStyle   = (LONG) GetWindowLongPtr(wmPtr->wrapper, GWL_STYLE);
+	    curExStyle = (curExStyle & ~(wmPtr->exStyleConfig)) | exStyle;
+	    curStyle   = (curStyle & ~(wmPtr->styleConfig)) | style;
+	    wmPtr->styleConfig = style;
+	    wmPtr->exStyleConfig = exStyle;
+	    SetWindowLongPtr(wmPtr->wrapper, GWL_EXSTYLE,(LONG_PTR)curExStyle);
+	    SetWindowLongPtr(wmPtr->wrapper, GWL_STYLE, (LONG_PTR) curStyle);
+	    SetWindowPos(wmPtr->wrapper, NULL, 0, 0, 0, 0,
+		    SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE|SWP_NOSENDCHANGING
+		    |SWP_NOZORDER|SWP_FRAMECHANGED);
+	}
     }
     return TCL_OK;
 }
-- 
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