* macosx/tkMacOSXCarbonEvents.c: add window event target carbon event

	* macosx/tkMacOSXEvent.c:	 handler for all kEventClassWindow and
	* macosx/tkMacOSXEvent.h:	 kEventClassMouse events; move all
	* macosx/tkMacOSXNotify.c:	 remaining events except for
	* macosx/tkMacOSXWindowEvent.c:	 kEventClassKeyboard from dispatcher to
	application event handler; pass event handler callRef downstream; fix
	debug event tracing; process all tcl event types in carbon event timer;
	delay carbon event timer first fire; add TkMacOSXTrackingLoop() to mark
	enter/exit of event tracking loop during which all tcl events but only
	carbon update events should be processed by the timer (replaces various
	calls to Tcl_SetServiceMode()); rename TkMacOSXReceiveAndProcessEvent()
	to TkMacOSXReceiveAndDispatchEvent(), move it from tkMacOSXEvent.c to
	tkMacOSXCarbonEvents.c and modify it to dequeue only update events
	during a tracking loop; add TkMacOSXRunTclEventLoop() to standardize
	the various ways in use to run the tcl event loop; add handling of
	kEventClassAppearance events (for ScrollBarVariantChanged event).

	* macosx/tkMacOSXDialog.c:	use new TkMacOSXTrackingLoop() around
	* macosx/tkMacOSXEvent.c:	blocking API that puts up modal dialogs
	* macosx/tkMacOSXMenu.c:	or when entering/exiting menu/control
	* macosx/tkMacOSXMouseEvent.c:	tracking, window dragging and other
	* macosx/tkMacOSXScale.c:	mouse tracking loops.
	* macosx/tkMacOSXScrlbr.c:
	* macosx/tkMacOSXWindowEvent.c:
	* macosx/tkMacOSXWm.c:

	* macosx/tkMacOSXDialog.c:	use new TkMacOSXRunTclEventLoop()
	* macosx/tkMacOSXScale.c:	instead of Tcl_DoOneEvent(),
	* macosx/tkMacOSXScrlbr.c:	Tcl_ServiceAll(), TclServiceIdle()
	* macosx/tkMacOSXWindowEvent.c:	and Tcl_GlobalEval("update idletasks").

	* macosx/tkMacOSXColor.c: make available as Tk system colors all
	* macosx/tkMacOSXPort.h:  appearance manager brushes, text colors and
	backgrounds with new and legacy names, as well as the fully transparent
	color "systemTransparent"; add TkMacOSXSetColorIn{Port,Context}() to
	directly set an X pixel color value in the current QD port resp. the
	given CG context without requiring passage through rgb representation
	(lossy for most system colors); modernize/remove Classic-era code;
	replace crufty strcmp() elseifs by Tcl_GetIndexFromObjStruct().

	* macosx/tkMacOSXButton.c:	use new TkMacOSXSetColorInPort()
	* macosx/tkMacOSXDraw.c:	instead of setting rgb color directly
	* macosx/tkMacOSXMenubutton.c:	to allow for non-rgb system colors.

	* macosx/tkMacOSXCursor.c: implement "none" cursor as on other
	platforms [Patch 1615427]; add all missing appearance manager cursors.

	* macosx/tkMacOSXDefault.h: set SELECT_FG_COLORs to None to match aqua
	L&F; use standard system color names; use new 'menu' system font;
	correct default scrollbar width.

	* macosx/tkMacOSXDraw.c:	standardize initialization, use and
	* macosx/tkMacOSXInt.h:		emptying of various static temp rgns
	* macosx/tkMacOSXRegion.c:	onto two global RgnHandles; in debug
	* macosx/tkMacOSXSubwindows.c:	builds, verify emptiness of these temp
	* macosx/tkMacOSXWindowEvent.c:	rgns before use.

	* macosx/tkMacOSXDraw.c: add TkMacOSX{Setup,Restore}DrawingContext() to
	* macosx/tkMacOSXInt.h:  abstract common setup & teardown of drawing
	environment (for both CG and QD); save/restore QD theme drawing state;
	handle GC clip region; add TkpClipDrawableToRect() to allow clipped
	drawing into drawable regardless of GC used; use new system color
	"systemWindowHeaderBackground" to setup background in themed toplevels;
	correct implementation of TkMacOSXMakeStippleMap().

	* macosx/tkMacOSXEntry.c: use new TkMacOSXSetupDrawingContext() and
	* macosx/tkMacOSXFont.c:  TkMacOSXRestoreDrawingContext() instead of
	various setup/teardown procs like TkMacOSX{SetUp,Release}CGContext(),
	TkMacOSXQuarz{Start,End}Draw(), TkMacOSXSetUpGraphicsPort() etc.

	* macosx/tkMacOSXEmbed.c: add CG context and drawable clip rgn fields
	* macosx/tkMacOSXInt.h:   to MacDrawable struct.
	* macosx/tkMacOSXSubwindows.c:

	* macosx/tkMacOSXDialog.c: make -parent option of tk_getOpenFile et al.
	use the sheet version of NavServices dialogs; ensure native parent win
	exists before using StandardSheet API for tk_messageBox [Bug 1677611];
	force sheets to behave like app-modal dialogs via WindowModality() API;
	use more modern ColorPicker API.

	* macosx/tkAboutDlg.r: use themed movable modal dialog, fix (c) year.

	* macosx/tkMacOSXEntry.c:  take xOff/yOff of MacDrawable into account
	when computing locations/bounds to ensure correct posititioning when
	not drawing into intermediate pixmap.

	* macosx/tkMacOSXFont.c: use appearance manager API to map system font
	* macosx/tkMacOSXFont.h: names to TkFonts; add "menu" system font for
	menu item text drawing from MDEF; disable broken QD stippling.

	* macosx/tkMacOSXMenu.c:		large-scale rewrite of custom
	* macosx/tkMacOSXMenu.r (removed):	MDEF and related code that
	* unix/Makefile.in:			restores many longtime-MIA
	features to working order (e.g. images, custom colors & fonts in menus
	etc); implement compound menu items; use Appearance Mgr and ThemeText
	APIs to mimic native MDEF as closely as possible when default "menu"
	system font is used; remove now obsolete SICN drawing code and
	resources.

	* macosx/tkMacOSXCarbonEvents.c: handle additional menu carbon events
	* macosx/tkMacOSXEvent.c:	 in order to support <<MenuSelect>> in
	* macosx/tkMacOSXMenu.c:	 the menubar and in menus that are not
	* macosx/tkMacOSXMenus.c:	 using the custom MDEF [Bug 1620826];
	fix early and missing clearing of current Tk active menu entry; fix
	extraneous sending of <<MenuSelect>> during active menu entry clearing.

	* macosx/tkMacOSXMouseEvent.c: add support for async window dragging by
	the window server; set the corresponding window attribute by default.

	* macosx/tkMacOSXMouseEvent.c: rationalized handling order of
	non-mousedown events; add TkMacOSXModifierState() to retrieve the
	current key modifiers in carbon format.

	* macosx/tkMacOSXScrlbr.c: use appearance manager API to retrieve
	scrollbar component metrics; add awareness of multiple possibilites for
	scrollbar arrow position in aqua and handle user changes to arrow
	position pref; handle difference in metrics of small & large scrollbar
	variants; handle aqua "jump to here" scrollbar behaviour; correct
	computation of scroll view size and position; enforce min scrollbar
	height to avoid scrollbar component overlap; erase scrollbar area
	outside of standard width; remove broken auto-adjust code; account for
	window class when leaving space for grow box; remove code to manually
	draw grow box; use modern API for thumb scroll proc; replace
	HiliteControl() by modern API; replace control mgr constants with
	appearance mgr equivalents.

	* macosx/tkMacOSXSubwindows.c: use SetWindowBounds() API instead of
	SizeWindow(); invalidate clip regions after X{Map,Unmap}Window as fix
	for [Bug 940117] made them dependent on mapping state; remove unneeded
	calls to TkMacOSXInvalClipRgns() and unnecessary setting of QD port;
	use native-endian pixmap on intel; remove obsolete pixmap pix locking.

	* macosx/tkMacOSXWindowEvent.c: handle only the first of a batch of
	kEventAppAvailableWindowBoundsChanged events sent per transaction;
	handle kEventWindowBoundsChanged event to support live window resizing
	and centralized sending of location/size changed ConfigureNotify
	events; ensure HIGrowBox is redrawn after bounds change; constrain
	window after dragging to ensure titlebar is not inacessible
	offscreen or under dock/menubar; handle kEventWindowGetRegion and
	kEventWindowDrawContent for transparent windows to mark resp. paint
	content region as transparent; handle kEventWindowConstrain for
	fullscreen windows to ensure bounds match new screen size; enter/exit
	fullscreen UIMode upon activation/deactivation of fullscreen window.

	* macosx/tkMacOSXWm.c: use live-resize and async-drag carbon window
	* macosx/tkMacOSXWm.h: attributes for toplevels by default; implement
	new [wm attributes] -topmost, -transparent and -fullscreen; refactor
	WmAttributesCmd() parallelling the tkUnixWm.c implementation, use thus
	factored proc to set proxy icon from [wm iconbitmap]; dynamically
	determine default values for toplevel min and max sizes (similar to
	tkWinWm.c impl): min sizes depend on window class & attributes to
	ensure visibility of all titlebar widgets and grow box, max sizes
	depend on maximal window bounds for all active displays; factor out
	code that puts into effect changes to master or override_redirect; use
	RepositionWindow() API to determine staggered initial window bounds;
	correct resize limit calculations, handle gridding and use modern
	resize API in TkMacOSXGrowToplevel(); remove sending of ConfigureNotify
	after resize or zoom (now handled by BoundsChanged handler); correct
	composite carbon window attribute handling, remove currently unusable
	attributes and add new attributes in [tk::unsupported::MacWindowStyle];
	ensure validity of window class and attributes before use; apply
	changes to window class when handling carbon window attribute changes
	(if HIWindowChangeClass() API available); add debug build warning
	message when deprecated window style is used instead of window class;
	use transparent HIGrowBox for resizable windows; avoid unnecessary
	calls to window structure width API; use tcl time API in TkpGetMS();
	add TkMacOSXEnterExitFullscreen() to enter/exit UIMode with dock and
	menubar hidden; restrict wmTracing output to debug builds; remove
	unneeded calls to TkMacOSXInvalClipRgns() and unnecessary setting of QD
	port; workaround GetWindowStructureWidths() Carbon bug (bogus results
	for never-mapped floating windows).

	* macosx/tkMacOSXXStubs.c (TkMacOSXDisplayChanged): add maximal window
	bounds field to Screen record (in ext_data), computed as the union of
	available window positioning bounds of all graphics devices (displays).

	* macosx/tkMacOSXBitmap.c: fix macRoman encoding leak.
	* macosx/tkMacOSXCursor.c:

	* macosx/tkMacOSXDebug.c (TkMacOSXCarbonEventToAscii): use static
	* macosx/tkMacOSXDebug.h: buffer to simplify callers; const fixes.

	* macosx/tkMacOSXBitmap.c: use more efficient QDSwapPort() instead of
	* macosx/tkMacOSXButton.c: GetPort()/SetPort()/GetGWorld()/SetGWorld().
	* macosx/tkMacOSXDraw.c:
	* macosx/tkMacOSXFont.c:
	* macosx/tkMacOSXMenubutton.c:
	* macosx/tkMacOSXScale.c:
	* macosx/tkMacOSXScrlbr.c:
	* macosx/tkMacOSXXStubs.c:

	* macosx/tkMacOSXColor.c: use kHIToolboxVersionNumber for runtime OS
	* macosx/tkMacOSXEntry.c: version check rather than Gestalt() etc.
	* macosx/tkMacOSXInt.h:
	* macosx/tkMacOSXWm.c:

	* macosx/tkMacOSXDraw.c: remove obsolete and now incorrect
	* macosx/tkMacOSXInt.h:  tkMenuCascadeRgn clipping code.
	* macosx/tkMacOSXMenu.c:

	* macosx/tkMacOSXHLEvents.c: replace Tcl_GlobalEval() resp. Tcl_Eval()
	* macosx/tkMacOSXScrlbr.c:   by Tcl_EvalEx().
	* macosx/tkMacOSXInit.c:

	* macosx/tkMacOSXInit.c (TkpInit): reorder initialization steps.

	* macosx/tkMacOSXKeyEvent.c: remove pre-10.2 support.

	* macosx/tkMacOSXMenus.c: remove now useless call to
	TkMacOSXHandleTearoffMenu(); use \x.. quoting for non-latin1 macroman
	literar chars to allow file to be edited as utf-8.

	* macosx/tkMacOSXScale.c: replace TrackControl() by modern
	* macosx/tkMacOSXScrlbr.c: HandleControlClick() API (using new
	TkMacOSXModifierState()).

	* macosx/tkMacOSXInt.h:		move all constant #defines needed to
	* macosx/tkMacOSXColor.c:	support building on older OS X releases
	* macosx/tkMacOSXEvent.h:	to a central location in tkMacOSXInt.h.
	* macosx/tkMacOSXFont.c:
	* macosx/tkMacOSXMenu.c:
	* macosx/tkMacOSXMenubutton.c:
	* macosx/tkMacOSXMenus.c:
	* macosx/tkMacOSXMouseEvent.c:
	* macosx/tkMacOSXWm.c:

	* macosx/tkMacOSXInt.h:		 add ChkErr() macro to factor out
	* macosx/tkMacOSXButton.c:	 Carbon OSStatus return value checking
	* macosx/tkMacOSXCarbonEvents.c: and TkMacOSXDbgMsg() macro to factour
	* macosx/tkMacOSXClipboard.c:	 out debug message output; use these
	* macosx/tkMacOSXColor.c:	 macros to replace #ifdef TK_MAC_DEBUG
	* macosx/tkMacOSXCursor.c:	 blocks & direct printing to stderr,
	* macosx/tkMacOSXDebug.c:	 and to do additional OSStatus return
	* macosx/tkMacOSXDialog.c:	 checking, and to standardize OSStatus
	* macosx/tkMacOSXDraw.c:	 usage.
	* macosx/tkMacOSXEntry.c:
	* macosx/tkMacOSXEvent.c:
	* macosx/tkMacOSXFont.c:
	* macosx/tkMacOSXHLEvents.c:
	* macosx/tkMacOSXInit.c:
	* macosx/tkMacOSXKeyEvent.c:
	* macosx/tkMacOSXMenu.c:
	* macosx/tkMacOSXMenubutton.c:
	* macosx/tkMacOSXMenus.c:
	* macosx/tkMacOSXMouseEvent.c:
	* macosx/tkMacOSXScrlbr.c:
	* macosx/tkMacOSXSubwindows.c:
	* macosx/tkMacOSXWindowEvent.c:
	* macosx/tkMacOSXWm.c:
	* macosx/tkMacOSXXStubs.c:

	* macosx/tkMacOSXSend.c:	remove duplicate/unused declarations.
	* macosx/tkMacOSXXStubs.c:

	* macosx/tkMacOSXDebug.c:	const fixes.
	* macosx/tkMacOSXInit.c:
	* macosx/tkMacOSXTest.c:
	* macosx/tkMacOSXWm.c:
	* macosx/tkMacOSXXStubs.c:

	* macosx/Wish-Info.plist.in: add tcl document extensions/mime types and
	LSMinimumSystemVersion, LSRequiresCarbon & NSAppleScriptEnabled keys.

	* macosx/tkMacOSXAETE.r:	fix whitespace.
	* macosx/tkMacOSXConfig.c:
	* macosx/tkMacOSXCursors.r:
	* macosx/tkMacOSXKeyboard.c:
	* macosx/tkMacOSXSend.c:
	* macosx/tkMacOSXXCursors.r:
	* macosx/README:

	* macosx/Makefile:		fix/add copyright and license refs.
	* macosx/Tk-Info.plist.in:
	* macosx/Wish-Info.plist.in:
	* macosx/tkMacOSX.h:


FossilOrigin-Name: c91e0ad0ae93c1f822b278935a893452c02534e5

1 files changed, 483 insertions, 283 deletions

diff --git a/macosx/tkMacOSXWindowEvent.c b/macosx/tkMacOSXWindowEvent.c
index b4a7845..86fc381 100644
--- a/macosx/tkMacOSXWindowEvent.c
+++ b/macosx/tkMacOSXWindowEvent.c
@@ -2,59 +2,59 @@
  * tkMacOSXWindowEvent.c --
  *
  *	This file defines the routines for both creating and handling
- *      Window Manager class events for Tk.
+ *	Window Manager class events for Tk.
  *
  * Copyright 2001, Apple Computer, Inc.
- * Copyright (c) 2005 Daniel A. Steffen <das@users.sourceforge.net>
+ * Copyright (c) 2005-2007 Daniel A. Steffen <das@users.sourceforge.net>
  *
  * See the file "license.terms" for information on usage and redistribution of
  * this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- *      The following terms apply to all files originating from Apple
- *      Computer, Inc. ("Apple") and associated with the software
- *      unless explicitly disclaimed in individual files.
- *
- *
- *      Apple hereby grants permission to use, copy, modify,
- *      distribute, and license this software and its documentation
- *      for any purpose, provided that existing copyright notices are
- *      retained in all copies and that this notice is included
- *      verbatim in any distributions. No written agreement, license,
- *      or royalty fee is required for any of the authorized
- *      uses. Modifications to this software may be copyrighted by
- *      their authors and need not follow the licensing terms
- *      described here, provided that the new terms are clearly
- *      indicated on the first page of each file where they apply.
- *
- *
- *      IN NO EVENT SHALL APPLE, THE AUTHORS OR DISTRIBUTORS OF THE
- *      SOFTWARE BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL,
- *      INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
- *      THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF,
- *      EVEN IF APPLE OR THE AUTHORS HAVE BEEN ADVISED OF THE
- *      POSSIBILITY OF SUCH DAMAGE.  APPLE, THE AUTHORS AND
- *      DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
- *      BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
- *      FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.  THIS
- *      SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND APPLE,THE
- *      AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
- *      MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- *
- *      GOVERNMENT USE: If you are acquiring this software on behalf
- *      of the U.S. government, the Government shall have only
- *      "Restricted Rights" in the software and related documentation
- *      as defined in the Federal Acquisition Regulations (FARs) in
- *      Clause 52.227.19 (c) (2).  If you are acquiring the software
- *      on behalf of the Department of Defense, the software shall be
- *      classified as "Commercial Computer Software" and the
- *      Government shall have only "Restricted Rights" as defined in
- *      Clause 252.227-7013 (c) (1) of DFARs.  Notwithstanding the
- *      foregoing, the authors grant the U.S. Government and others
- *      acting in its behalf permission to use and distribute the
- *      software in accordance with the terms specified in this
- *      license.
- *
- * RCS: @(#) $Id: tkMacOSXWindowEvent.c,v 1.3.2.17 2006/11/02 15:18:26 das Exp $
+ *	The following terms apply to all files originating from Apple
+ *	Computer, Inc. ("Apple") and associated with the software
+ *	unless explicitly disclaimed in individual files.
+ *
+ *
+ *	Apple hereby grants permission to use, copy, modify,
+ *	distribute, and license this software and its documentation
+ *	for any purpose, provided that existing copyright notices are
+ *	retained in all copies and that this notice is included
+ *	verbatim in any distributions. No written agreement, license,
+ *	or royalty fee is required for any of the authorized
+ *	uses. Modifications to this software may be copyrighted by
+ *	their authors and need not follow the licensing terms
+ *	described here, provided that the new terms are clearly
+ *	indicated on the first page of each file where they apply.
+ *
+ *
+ *	IN NO EVENT SHALL APPLE, THE AUTHORS OR DISTRIBUTORS OF THE
+ *	SOFTWARE BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL,
+ *	INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF
+ *	THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF,
+ *	EVEN IF APPLE OR THE AUTHORS HAVE BEEN ADVISED OF THE
+ *	POSSIBILITY OF SUCH DAMAGE.  APPLE, THE AUTHORS AND
+ *	DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
+ *	BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
+ *	FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.	 THIS
+ *	SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND APPLE,THE
+ *	AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
+ *	MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ *	GOVERNMENT USE: If you are acquiring this software on behalf
+ *	of the U.S. government, the Government shall have only
+ *	"Restricted Rights" in the software and related documentation
+ *	as defined in the Federal Acquisition Regulations (FARs) in
+ *	Clause 52.227.19 (c) (2).  If you are acquiring the software
+ *	on behalf of the Department of Defense, the software shall be
+ *	classified as "Commercial Computer Software" and the
+ *	Government shall have only "Restricted Rights" as defined in
+ *	Clause 252.227-7013 (c) (1) of DFARs.  Notwithstanding the
+ *	foregoing, the authors grant the U.S. Government and others
+ *	acting in its behalf permission to use and distribute the
+ *	software in accordance with the terms specified in this
+ *	license.
+ *
+ * RCS: @(#) $Id: tkMacOSXWindowEvent.c,v 1.3.2.18 2007/04/29 02:26:50 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -63,11 +63,17 @@
 #include "tkMacOSXDebug.h"
 
 /*
+#ifdef TK_MAC_DEBUG
+#define TK_MAC_DEBUG_CLIP_REGIONS
+#endif
+*/
+
+/*
  * Declarations of global variables defined in this file.
  */
 
-static int tkMacOSXAppInFront = true;	/* Boolean variable for determining if 
-					 * we are the frontmost app.  Only set 
+static int tkMacOSXAppInFront = true;	/* Boolean variable for determining if
+					 * we are the frontmost app. Only set
 					 * in TkMacOSXProcessApplicationEvent
 					 */
 static RgnHandle gDamageRgn = NULL;
@@ -75,167 +81,342 @@ static RgnHandle gDamageRgn = NULL;
 /*
  * Declaration of functions used only in this file
  */
- 
+
 static int GenerateUpdateEvent( Window window);
 static int GenerateUpdates( RgnHandle updateRgn, TkWindow *winPtr);
 static int GenerateActivateEvents( Window window, int activeFlag);
+static void ClearPort(CGrafPtr port);
 
-
+
 /*
  *----------------------------------------------------------------------
  *
  * TkMacOSXProcessApplicationEvent --
  *
- *        This processes Application level events, mainly activate
- *        and deactivate.
+ *	This processes Application level events, mainly activate
+ *	and deactivate.
  *
  * Results:
- *        o.
+ *	0.
  *
  * Side effects:
- *        Hide or reveal floating windows, and set tkMacOSXAppInFront.
+ *	Hide or reveal floating windows, and set tkMacOSXAppInFront.
  *
  *----------------------------------------------------------------------
  */
- 
+
 MODULE_SCOPE int
 TkMacOSXProcessApplicationEvent(
-        TkMacOSXEvent *eventPtr, 
-        MacEventStatus *statusPtr)
+	TkMacOSXEvent *eventPtr,
+	MacEventStatus *statusPtr)
 {
     Tcl_CmdInfo dummy;
 
     /*
-     * This is a bit of a hack.  We get "show" events both when we come back
-     * from being hidden, and whenever we are activated.  I only want to run
+     * This is a bit of a hack. We get "show" events both when we come back
+     * from being hidden, and whenever we are activated. I only want to run
      * the "show" proc when we have been hidden already, not as a substitute
-     * for <Activate>.  So I use this toggle...
+     * for <Activate>. So I use this toggle...
      */
     static int toggleHide = 0;
 
     switch (eventPtr->eKind) {
-        case kEventAppActivated:
-            tkMacOSXAppInFront = true;
-            ShowFloatingWindows();
-            break;
-        case kEventAppDeactivated:
-            TkSuspendClipboard();
-            tkMacOSXAppInFront = false;
-            HideFloatingWindows();
-            break;
-        case kEventAppQuit:
-            statusPtr->stopProcessing = 1;
-            break;
-        case kEventAppHidden:
-            if (toggleHide == 0) {
-                toggleHide = 1;
-                if (eventPtr->interp && Tcl_GetCommandInfo(eventPtr->interp, 
-                        "::tk::mac::OnHide", &dummy)) {
-                    Tcl_GlobalEval(eventPtr->interp, "::tk::mac::OnHide");
-                }
-            }
-            statusPtr->stopProcessing = 1;
-            break;
-        case kEventAppShown:
-            if (toggleHide == 1) {
-                toggleHide = 0;
-                if (eventPtr->interp && Tcl_GetCommandInfo(eventPtr->interp, 
-                        "::tk::mac::OnShow", &dummy)) {
-                    Tcl_GlobalEval(eventPtr->interp, "::tk::mac::OnShow");
-                }
-            }
-            statusPtr->stopProcessing = 1;
-            break;
+	case kEventAppActivated:
+	    tkMacOSXAppInFront = true;
+	    ShowFloatingWindows();
+	    break;
+	case kEventAppDeactivated:
+	    TkSuspendClipboard();
+	    tkMacOSXAppInFront = false;
+	    HideFloatingWindows();
+	    break;
+	case kEventAppQuit:
+	    statusPtr->stopProcessing = 1;
+	    break;
+	case kEventAppHidden:
+	    if (toggleHide == 0) {
+		toggleHide = 1;
+		if (eventPtr->interp && Tcl_GetCommandInfo(eventPtr->interp,
+			"::tk::mac::OnHide", &dummy)) {
+		    Tcl_GlobalEval(eventPtr->interp, "::tk::mac::OnHide");
+		}
+	    }
+	    statusPtr->stopProcessing = 1;
+	    break;
+	case kEventAppShown:
+	    if (toggleHide == 1) {
+		toggleHide = 0;
+		if (eventPtr->interp && Tcl_GetCommandInfo(eventPtr->interp,
+			"::tk::mac::OnShow", &dummy)) {
+		    Tcl_GlobalEval(eventPtr->interp, "::tk::mac::OnShow");
+		}
+	    }
+	    statusPtr->stopProcessing = 1;
+	    break;
 	case kEventAppAvailableWindowBoundsChanged: {
-            TkDisplay *dispPtr = TkGetDisplayList();
-            TkMacOSXDisplayChanged(dispPtr->display);
+	    static UInt32 prevId = 0;
+	    UInt32 id;
+	    OSStatus err;
+
+	    err = ChkErr(GetEventParameter, eventPtr->eventRef,
+		    kEventParamTransactionID, typeUInt32,
+		    NULL, sizeof(id), NULL, &id);
+	    if (err != noErr || id != prevId) {
+		TkDisplay *dispPtr = TkGetDisplayList();
+
+		prevId = id;
+		TkMacOSXDisplayChanged(dispPtr->display);
+	    }
 	    /*
 	     * Should we call ::tk::mac::OnDisplayChanged?
 	     */
 	    break;
 	}
-        default:
-            break;
+	default:
+	    break;
     }
     return 0;
 }
-/*
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkMacOSXProcessAppearanceEvent --
+ *
+ *	This processes Appearance events.
+ *
+ * Results:
+ *	0.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+MODULE_SCOPE int
+TkMacOSXProcessAppearanceEvent(
+	TkMacOSXEvent *eventPtr,
+	MacEventStatus *statusPtr)
+{
+    switch (eventPtr->eKind) {
+	case kEventAppearanceScrollBarVariantChanged:
+	    TkMacOSXInitScrollbarMetrics();
+	    break;
+	default:
+	    break;
+    }
+    return 0;
+}
+
+/*
  *----------------------------------------------------------------------
  *
  * TkMacOSXProcessWindowEvent --
  *
- *        This processes Window level events, mainly activate
- *        and deactivate.
+ *	This processes Window level events, mainly activate
+ *	and deactivate.
  *
  * Results:
- *        0.
+ *	0.
  *
  * Side effects:
- *        Cause Windows to be moved forward or backward in the 
- *        window stack.
+ *	Cause Windows to be moved forward or backward in the
+ *	window stack.
  *
  *----------------------------------------------------------------------
  */
 
 MODULE_SCOPE int
 TkMacOSXProcessWindowEvent(
-        TkMacOSXEvent * eventPtr, 
-        MacEventStatus * statusPtr)
-{ 
-    OSStatus  status;
+	TkMacOSXEvent * eventPtr,
+	MacEventStatus * statusPtr)
+{
+    OSStatus err;
     WindowRef whichWindow;
-    Window    window;
-    int       eventFound = false;
-    
-    switch (eventPtr->eKind) { 
-        case kEventWindowActivated:
-        case kEventWindowDeactivated:
-        case kEventWindowUpdate:
-        case kEventWindowExpanded:
-            break;
-        default:
-            return 0;
-            break;
+    Window window;
+    int eventFound = false;
+    TkDisplay *dispPtr;
+    TkWindow *winPtr;
+
+    switch (eventPtr->eKind) {
+	case kEventWindowActivated:
+	case kEventWindowDeactivated:
+	case kEventWindowUpdate:
+	case kEventWindowExpanded:
+	case kEventWindowBoundsChanged:
+	case kEventWindowDragStarted:
+	case kEventWindowDragCompleted:
+	case kEventWindowConstrain:
+	case kEventWindowGetRegion:
+	case kEventWindowDrawContent:
+	    break;
+	default:
+	    return 0;
+	    break;
     }
-    status = GetEventParameter(eventPtr->eventRef,
-            kEventParamDirectObject,
-            typeWindowRef, NULL,
-            sizeof(whichWindow), NULL,
-            &whichWindow);
-    if (status != noErr) {
-#ifdef TK_MAC_DEBUG
-        fprintf ( stderr, "TkMacOSXHandleWindowEvent:Failed to retrieve window" );
-#endif
-        return 0;
+    err = ChkErr(GetEventParameter, eventPtr->eventRef,
+	    kEventParamDirectObject, typeWindowRef, NULL, sizeof(whichWindow),
+	    NULL, &whichWindow);
+    if (err != noErr) {
+	return 0;
     }
-    
+
     window = TkMacOSXGetXWindow(whichWindow);
+    dispPtr = TkGetDisplayList();
+    winPtr = (TkWindow *)Tk_IdToWindow(dispPtr->display, window);
 
-    switch (eventPtr->eKind) {
-        case kEventWindowActivated:
-            eventFound |= GenerateActivateEvents(window, 1);
-            eventFound |= TkMacOSXGenerateFocusEvent(window, 1);
-            break;
-        case kEventWindowDeactivated:
-            eventFound |= GenerateActivateEvents(window, 0);
-            eventFound |= TkMacOSXGenerateFocusEvent(window, 0);
-            break;
-        case kEventWindowUpdate:
-            if (GenerateUpdateEvent(window)) {
-                eventFound = true;
-            }
-            break;
-        case kEventWindowExpanded: {
-            TkDisplay *dispPtr;
-            TkWindow  *winPtr;
-            dispPtr = TkGetDisplayList();
-            winPtr = (TkWindow *)Tk_IdToWindow(dispPtr->display, window);
-            if (winPtr) {
-		TkpWmSetState(winPtr, TkMacOSXIsWindowZoomed(winPtr) ?
-			ZoomState : NormalState);
-            }
-            break;
-        }
+    if (window != None) {
+	switch (eventPtr->eKind) {
+	    case kEventWindowActivated:
+	    case kEventWindowDeactivated: {
+		int activate = (eventPtr->eKind == kEventWindowActivated);
+
+		eventFound |= GenerateActivateEvents(window, activate);
+		eventFound |= TkMacOSXGenerateFocusEvent(window, activate);
+		if (winPtr) {
+		    TkMacOSXEnterExitFullscreen(winPtr, activate);
+		}
+		statusPtr->stopProcessing = 1;
+		break;
+	    }
+	    case kEventWindowUpdate:
+		if (GenerateUpdateEvent(window)) {
+		    eventFound = true;
+		    statusPtr->stopProcessing = 1;
+		}
+		break;
+	    case kEventWindowExpanded:
+		if (winPtr) {
+		    TkpWmSetState(winPtr, TkMacOSXIsWindowZoomed(winPtr) ?
+			    ZoomState : NormalState);
+		}
+		break;
+	    case kEventWindowBoundsChanged:
+		if (winPtr) {
+		    WmInfo *wmPtr = winPtr->wmInfoPtr;
+		    UInt32 attr;
+		    Rect bounds;
+		    int x = -1, y = -1, width = -1, height = -1, flags = 0;
+
+		    ChkErr(GetEventParameter, eventPtr->eventRef,
+			    kEventParamAttributes, typeUInt32,
+			    NULL, sizeof(attr), NULL, &attr);
+		    ChkErr(GetEventParameter, eventPtr->eventRef,
+			    kEventParamCurrentBounds, typeQDRectangle,
+			    NULL, sizeof(bounds), NULL, &bounds);
+		    if (attr & kWindowBoundsChangeOriginChanged) {
+			x = bounds.left - wmPtr->xInParent;
+			y = bounds.top	- wmPtr->yInParent;
+			flags |= TK_LOCATION_CHANGED;
+		    }
+		    if (attr & kWindowBoundsChangeSizeChanged) {
+			width = bounds.right  - bounds.left;
+			height = bounds.bottom - bounds.top;
+			flags |= TK_SIZE_CHANGED;
+		    }
+		    TkGenWMConfigureEvent((Tk_Window)winPtr, x, y, width,
+			    height, flags);
+		    if (attr & kWindowBoundsChangeUserResize ||
+			    attr & kWindowBoundsChangeUserDrag) {
+			TkMacOSXRunTclEventLoop();
+		    }
+		    if (wmPtr->attributes & kWindowResizableAttribute) {
+			HIViewRef growBoxView;
+
+			err = HIViewFindByID(HIViewGetRoot(whichWindow),
+				kHIViewWindowGrowBoxID, &growBoxView);
+			if (err == noErr) {
+			    ChkErr(HIViewSetNeedsDisplay, growBoxView, true);
+			}
+		    }
+		}
+		break;
+	    case kEventWindowDragStarted:
+		if (winPtr) {
+		    TkMacOSXTrackingLoop(1);
+		}
+		break;
+	    case kEventWindowDragCompleted:
+		if (winPtr) {
+		    Rect maxBounds, bounds, strWidths;
+		    int h = 0, v = 0;
+
+		    TkMacOSXTrackingLoop(0);
+		    ChkErr(GetWindowGreatestAreaDevice, whichWindow,
+			    kWindowDragRgn, NULL, &maxBounds);
+		    ChkErr(GetWindowBounds, whichWindow, kWindowStructureRgn,
+			    &bounds);
+		    ChkErr(GetWindowStructureWidths, whichWindow, &strWidths);
+		    if (bounds.left > maxBounds.right - strWidths.left) {
+			h = maxBounds.right
+				- (strWidths.left ? strWidths.left : 40)
+				- bounds.left;
+		    } else if (bounds.right < maxBounds.left
+			    + strWidths.right) {
+			h = maxBounds.left
+				+ (strWidths.right ? strWidths.right : 40)
+				- bounds.right;
+		    }
+		    if (bounds.top > maxBounds.bottom - strWidths.top) {
+			v = maxBounds.bottom
+				- (strWidths.top ? strWidths.top : 40)
+				- bounds.top;
+		    } else if (bounds.bottom < maxBounds.top
+			    + strWidths.bottom) {
+			v = maxBounds.top
+				+ (strWidths.bottom ? strWidths.bottom : 40)
+				- bounds.bottom;
+		    } else if (strWidths.top && bounds.top < maxBounds.top) {
+			v = maxBounds.top - bounds.top;
+		    }
+		    if (h || v) {
+			OffsetRect(&bounds, h, v);
+			ChkErr(SetWindowBounds, whichWindow,
+			    kWindowStructureRgn, &bounds);
+		    }
+		}
+		break;
+	    case kEventWindowConstrain:
+		if (winPtr) {
+		    if (winPtr->wmInfoPtr->flags & WM_FULLSCREEN &&
+			    TkMacOSXMakeFullscreen(winPtr, whichWindow, 1,
+			    NULL) == TCL_OK) {
+			statusPtr->stopProcessing = 1;
+		    }
+		}
+		break;
+	    case kEventWindowGetRegion:
+		if (winPtr && (winPtr->wmInfoPtr->flags & WM_TRANSPARENT)) {
+		    WindowRegionCode code;
+
+		    statusPtr->stopProcessing = (CallNextEventHandler(
+			    eventPtr->callRef, eventPtr->eventRef) == noErr);
+		    err = ChkErr(GetEventParameter, eventPtr->eventRef,
+			    kEventParamWindowRegionCode, typeWindowRegionCode,
+			    NULL, sizeof(code), NULL, &code);
+		    if (err == noErr && code == kWindowOpaqueRgn) {
+			RgnHandle rgn;
+
+			err = ChkErr(GetEventParameter, eventPtr->eventRef,
+				kEventParamRgnHandle, typeQDRgnHandle, NULL,
+				sizeof(rgn), NULL, &rgn);
+			if (err == noErr) {
+			    SetEmptyRgn(rgn);
+			    statusPtr->stopProcessing = 1;
+			}
+		    }
+		}
+		break;
+	    case kEventWindowDrawContent:
+		if (winPtr && (winPtr->wmInfoPtr->flags & WM_TRANSPARENT)) {
+		    CGrafPtr port;
+
+		    GetPort(&port);
+		    ClearPort(port);
+		}
+		break;
+	}
     }
     return 0;
 }
@@ -245,60 +426,56 @@ TkMacOSXProcessWindowEvent(
  *
  * GenerateUpdateEvent --
  *
- *      Given a Macintosh window update event this function generates
- *      all the Expose XEvents needed by Tk.
+ *	Given a Macintosh window update event this function generates
+ *	all the Expose XEvents needed by Tk.
  *
- * Results:     
- *      True if event(s) are generated - false otherwise.
+ * Results:
+ *	True if event(s) are generated - false otherwise.
  *
  * Side effects:
- *      Additional events may be place on the Tk event queue.
- *          
+ *	Additional events may be place on the Tk event queue.
+ *
  *----------------------------------------------------------------------
- */     
+ */
 static int
 GenerateUpdateEvent(Window window)
 {
-    CGrafPtr    destPort;
-    WindowRef   macWindow;
+    CGrafPtr	destPort;
+    WindowRef	macWindow;
     TkDisplay * dispPtr;
     TkWindow  * winPtr;
-    int         result = 0;
-    static RgnHandle updtRgn = NULL, visRgn = NULL;
-    
+    int		result = 0;
+
     dispPtr = TkGetDisplayList();
     winPtr = (TkWindow *)Tk_IdToWindow(dispPtr->display, window);
- 
+
     if (winPtr ==NULL ){
-        return result;
+	return result;
     }
     if (gDamageRgn == NULL) {
-        gDamageRgn = NewRgn();
-    }
-    if (updtRgn == NULL) {
-        updtRgn = NewRgn();
-    }
-    if (visRgn == NULL) {
-        visRgn = NewRgn();
+	gDamageRgn = NewRgn();
     }
+    TkMacOSXCheckTmpRgnEmpty(1);
     destPort = TkMacOSXGetDrawablePort(window);
     macWindow = GetWindowFromPort(destPort);
-    GetWindowRegion(macWindow, kWindowUpdateRgn, updtRgn);
-    visRgn = QDGlobalToLocalRegion(destPort, updtRgn);
-    SectRegionWithPortVisibleRegion(destPort, visRgn);
-#if defined(TK_MAC_DEBUG) && defined(TK_MAC_DEBUG_CLIP_REGIONS)
+    GetWindowRegion(macWindow, kWindowUpdateRgn, tkMacOSXtmpRgn1);
+    QDGlobalToLocalRegion(destPort, tkMacOSXtmpRgn1);
+    SectRegionWithPortVisibleRegion(destPort, tkMacOSXtmpRgn1);
+#ifdef TK_MAC_DEBUG_CLIP_REGIONS
     TkMacOSXInitNamedDebugSymbol(HIToolbox, int, QDDebugFlashRegion,
-				 CGrafPtr port, RgnHandle region);
+				CGrafPtr port, RgnHandle region);
     if (QDDebugFlashRegion) {
 	/* Carbon-internal region flashing SPI (c.f. Technote 2124) */
-	QDDebugFlashRegion(destPort, visRgn);
+	QDDebugFlashRegion(destPort, tkMacOSXtmpRgn1);
     }
 #endif /* TK_MAC_DEBUG_CLIP_REGIONS */
     BeginUpdate(macWindow);
-    result = GenerateUpdates(visRgn, winPtr);
+    if (winPtr->wmInfoPtr->flags & WM_TRANSPARENT) {
+	ClearPort(destPort);
+    }
+    result = GenerateUpdates(tkMacOSXtmpRgn1, winPtr);
     EndUpdate(macWindow);
-    SetEmptyRgn(visRgn);
-    SetEmptyRgn(updtRgn);
+    SetEmptyRgn(tkMacOSXtmpRgn1);
     SetEmptyRgn(gDamageRgn);
     return result;
  }
@@ -308,16 +485,16 @@ GenerateUpdateEvent(Window window)
  *
  * GenerateUpdates --
  *
- *        Given a Macintosh update region and a Tk window this function
- *        geneates a X Expose event for the window if it is within the
- *        update region.  The function will then recursivly have each
- *        damaged window generate Expose events for its child windows.
+ *	Given a Macintosh update region and a Tk window this function
+ *	geneates a X Expose event for the window if it is within the
+ *	update region. The function will then recursivly have each
+ *	damaged window generate Expose events for its child windows.
  *
  * Results:
- *        True if event(s) are generated - false otherwise.
+ *	True if event(s) are generated - false otherwise.
  *
  * Side effects:
- *        Additional events may be place on the Tk event queue.
+ *	Additional events may be place on the Tk event queue.
  *
  *----------------------------------------------------------------------
  */
@@ -333,26 +510,26 @@ GenerateUpdates(
 
     TkMacOSXWinBounds(winPtr, &bounds);
     GetRegionBounds(updateRgn,&updateBounds);
-        
+
     if (bounds.top > updateBounds.bottom ||
-        updateBounds.top > bounds.bottom ||
-        bounds.left > updateBounds.right ||
-        updateBounds.left > bounds.right ||
-        !RectInRgn(&bounds, updateRgn)) {
-        return 0;
+	updateBounds.top > bounds.bottom ||
+	bounds.left > updateBounds.right ||
+	updateBounds.left > bounds.right ||
+	!RectInRgn(&bounds, updateRgn)) {
+	return 0;
     }
     if (!RectInRgn(&bounds, updateRgn)) {
-        return 0;
+	return 0;
     }
 
     event.xany.serial = Tk_Display(winPtr)->request;
     event.xany.send_event = false;
     event.xany.window = Tk_WindowId(winPtr);
     event.xany.display = Tk_Display(winPtr);
-        
+
     event.type = Expose;
 
-    /* 
+    /*
      * Compute the bounding box of the area that the damage occured in.
      */
 
@@ -369,97 +546,97 @@ GenerateUpdates(
     event.xexpose.width = damageBounds.right-damageBounds.left;
     event.xexpose.height = damageBounds.bottom-damageBounds.top;
     event.xexpose.count = 0;
-    
+
     Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
 
     /*
      * Generate updates for the children of this window
      */
-     
+
     for (childPtr = winPtr->childList; childPtr != NULL;
-                                       childPtr = childPtr->nextPtr) {
-        if (!Tk_IsMapped(childPtr) || Tk_IsTopLevel(childPtr)) {
-            continue;
-        }
+				       childPtr = childPtr->nextPtr) {
+	if (!Tk_IsMapped(childPtr) || Tk_IsTopLevel(childPtr)) {
+	    continue;
+	}
 
-        GenerateUpdates(updateRgn, childPtr);
+	GenerateUpdates(updateRgn, childPtr);
     }
-    
+
     /*
      * Generate updates for any contained windows
      */
 
     if (Tk_IsContainer(winPtr)) {
-        childPtr = TkpGetOtherWindow(winPtr);
-        if (childPtr != NULL && Tk_IsMapped(childPtr)) {
-            GenerateUpdates(updateRgn, childPtr);
-        }
-            
-        /*
-         * NOTE: Here we should handle out of process embedding.
-         */
-                    
-    }        
+	childPtr = TkpGetOtherWindow(winPtr);
+	if (childPtr != NULL && Tk_IsMapped(childPtr)) {
+	    GenerateUpdates(updateRgn, childPtr);
+	}
+
+	/*
+	 * NOTE: Here we should handle out of process embedding.
+	 */
+
+    }
 
     return 1;
 }
 
-/*         
+/*
  *----------------------------------------------------------------------
- *                      
+ *
  * GenerateActivateEvents --
- *                      
- *      Given a Macintosh window activate event this function generates all the
- *      X Activate events needed by Tk.
  *
- * Results:     
- *      True if event(s) are generated - false otherwise.
+ *	Given a Macintosh window activate event this function generates all the
+ *	X Activate events needed by Tk.
+ *
+ * Results:
+ *	True if event(s) are generated - false otherwise.
  *
  * Side effects:
- *      Additional events may be place on the Tk event queue.
- *          
+ *	Additional events may be place on the Tk event queue.
+ *
  *----------------------------------------------------------------------
  */
-    
+
 int
 GenerateActivateEvents(
-    Window window,                /* Root X window for event. */
-    int    activeFlag )
+    Window window,		  /* Root X window for event. */
+    int activeFlag )
 {
     TkWindow *winPtr;
     TkDisplay *dispPtr;
-    
+
     dispPtr = TkGetDisplayList();
     winPtr = (TkWindow *) Tk_IdToWindow(dispPtr->display, window);
     if (winPtr == NULL || winPtr->window == None) {
-        return false;
+	return false;
     }
 
     TkGenerateActivateEvents(winPtr,activeFlag);
     return true;
 }
 
-/*         
+/*
  *----------------------------------------------------------------------
- *                      
+ *
  * TkMacOSXGenerateFocusEvent --
- *                      
- *      Given a Macintosh window activate event this function generates all the
- *      X Focus events needed by Tk.
  *
- * Results:     
- *      True if event(s) are generated - false otherwise.
+ *	Given a Macintosh window activate event this function generates all the
+ *	X Focus events needed by Tk.
+ *
+ * Results:
+ *	True if event(s) are generated - false otherwise.
  *
  * Side effects:
- *      Additional events may be place on the Tk event queue.
- *          
+ *	Additional events may be place on the Tk event queue.
+ *
  *----------------------------------------------------------------------
- */     
+ */
 
 MODULE_SCOPE int
 TkMacOSXGenerateFocusEvent(
-    Window window,              /* Root X window for event. */
-    int    activeFlag )
+    Window window,		/* Root X window for event. */
+    int activeFlag )
 {
     XEvent event;
     Tk_Window tkwin;
@@ -468,7 +645,7 @@ TkMacOSXGenerateFocusEvent(
     dispPtr = TkGetDisplayList();
     tkwin = Tk_IdToWindow(dispPtr->display, window);
     if (tkwin == NULL) {
-        return false;
+	return false;
     }
 
     /*
@@ -482,14 +659,14 @@ TkMacOSXGenerateFocusEvent(
     }
 
     /*
-     * Generate FocusIn and FocusOut events.  This event
+     * Generate FocusIn and FocusOut events. This event
      * is only sent to the toplevel window.
      */
 
     if (activeFlag) {
-        event.xany.type = FocusIn;
+	event.xany.type = FocusIn;
     } else {
-        event.xany.type = FocusOut;
+	event.xany.type = FocusOut;
     }
 
     event.xany.serial = dispPtr->display->request;
@@ -502,13 +679,13 @@ TkMacOSXGenerateFocusEvent(
     Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
     return true;
 }
-
+
 /*
  *----------------------------------------------------------------------
  *
  * TkGenWMConfigureEvent --
  *
- *	Generate a ConfigureNotify event for Tk.  Depending on the 
+ *	Generate a ConfigureNotify event for Tk. Depending on the
  *	value of flag the values of width/height, x/y, or both may
  *	be changed.
  *
@@ -533,11 +710,11 @@ TkGenWMConfigureEvent(
     XEvent event;
     WmInfo *wmPtr;
     TkWindow *winPtr = (TkWindow *) tkwin;
-    
+
     if (tkwin == NULL) {
 	return;
     }
-    
+
     event.type = ConfigureNotify;
     event.xconfigure.serial = Tk_Display(tkwin)->request;
     event.xconfigure.send_event = False;
@@ -552,27 +729,21 @@ TkGenWMConfigureEvent(
 	event.xconfigure.above = None;
     }
 
-    if (flags & TK_LOCATION_CHANGED) {
-	event.xconfigure.x = x;
-	event.xconfigure.y = y;
-    } else {
-	event.xconfigure.x = Tk_X(tkwin);
-	event.xconfigure.y = Tk_Y(tkwin);
+    if (!(flags & TK_LOCATION_CHANGED)) {
 	x = Tk_X(tkwin);
 	y = Tk_Y(tkwin);
     }
-    if (flags & TK_SIZE_CHANGED) {
-	event.xconfigure.width = width;
-	event.xconfigure.height = height;
-    } else {
-	event.xconfigure.width = Tk_Width(tkwin);
-	event.xconfigure.height = Tk_Height(tkwin);
+    if (!(flags & TK_SIZE_CHANGED)) {
 	width = Tk_Width(tkwin);
 	height = Tk_Height(tkwin);
     }
-    
+    event.xconfigure.x = x;
+    event.xconfigure.y = y;
+    event.xconfigure.width = width;
+    event.xconfigure.height = height;
+
     Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
-    
+
     /*
      * Update window manager information.
      */
@@ -583,7 +754,7 @@ TkGenWMConfigureEvent(
 	    wmPtr->y = y;
 	    wmPtr->flags &= ~(WM_NEGATIVE_X | WM_NEGATIVE_Y);
 	}
-	if ((flags & TK_SIZE_CHANGED) && 
+	if ((flags & TK_SIZE_CHANGED) && !(wmPtr->flags & WM_SYNC_PENDING) &&
 		((width != Tk_Width(tkwin)) || (height != Tk_Height(tkwin)))) {
 	    if ((wmPtr->width == -1) && (width == winPtr->reqWidth)) {
 		/*
@@ -621,11 +792,11 @@ TkGenWMConfigureEvent(
 	    wmPtr->configHeight = height;
 	}
     }
-    
+
     /*
-     * Now set up the changes structure.  Under X we wait for the
-     * ConfigureNotify to set these values.  On the Mac we know imediatly that
-     * this is what we want - so we just set them.  However, we need to
+     * Now set up the changes structure. Under X we wait for the
+     * ConfigureNotify to set these values. On the Mac we know imediatly that
+     * this is what we want - so we just set them. However, we need to
      * make sure the windows clipping region is marked invalid so the
      * change is visible to the subwindow.
      */
@@ -635,13 +806,14 @@ TkGenWMConfigureEvent(
     winPtr->changes.height = height;
     TkMacOSXInvalClipRgns(tkwin);
 }
-
+
 /*
  *----------------------------------------------------------------------
  *
  * TkGenWMDestroyEvent --
  *
- *	Generate a WM Destroy event for Tk.   *
+ *	Generate a WM Destroy event for Tk.
+ *
  * Results:
  *	None.
  *
@@ -656,11 +828,11 @@ TkGenWMDestroyEvent(
     Tk_Window tkwin)
 {
     XEvent event;
-    
+
     event.xany.serial = Tk_Display(tkwin)->request;
     event.xany.send_event = False;
     event.xany.display = Tk_Display(tkwin);
-	
+
     event.xclient.window = Tk_WindowId(tkwin);
     event.xclient.type = ClientMessage;
     event.xclient.message_type = Tk_InternAtom(tkwin, "WM_PROTOCOLS");
@@ -668,7 +840,7 @@ TkGenWMDestroyEvent(
     event.xclient.data.l[0] = Tk_InternAtom(tkwin, "WM_DELETE_WINDOW");
     Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL);
 }
-
+
 /*
  *----------------------------------------------------------------------
  *
@@ -706,11 +878,11 @@ TkWmProtocolEventProc(
     }
     protocol = (Atom) eventPtr->xclient.data.l[0];
     for (protPtr = wmPtr->protPtr; protPtr != NULL;
-				   protPtr = protPtr->nextPtr) {
+		protPtr = protPtr->nextPtr) {
 	if (protocol == protPtr->protocol) {
 	    Tcl_Preserve((ClientData) protPtr);
-            interp = protPtr->interp;
-            Tcl_Preserve((ClientData) interp);
+	    interp = protPtr->interp;
+	    Tcl_Preserve((ClientData) interp);
 	    result = Tcl_GlobalEval(interp, protPtr->command);
 	    if (result != TCL_OK) {
 		Tcl_AddErrorInfo(interp, "\n    (command for \"");
@@ -719,14 +891,14 @@ TkWmProtocolEventProc(
 		Tcl_AddErrorInfo(interp, "\" window manager protocol)");
 		Tk_BackgroundError(interp);
 	    }
-            Tcl_Release((ClientData) interp);
+	    Tcl_Release((ClientData) interp);
 	    Tcl_Release((ClientData) protPtr);
 	    return;
 	}
     }
 
     /*
-     * No handler was present for this protocol.  If this is a
+     * No handler was present for this protocol. If this is a
      * WM_DELETE_WINDOW message then just destroy the window.
      */
 
@@ -734,13 +906,13 @@ TkWmProtocolEventProc(
 	Tk_DestroyWindow((Tk_Window) winPtr);
     }
 }
-
+
 /*
  *----------------------------------------------------------------------
  *
  * Tk_MacOSXIsAppInFront --
  *
- *	Returns 1 if this app is the foreground app. 
+ *	Returns 1 if this app is the foreground app.
  *
  * Results:
  *	1 if app is in front, 0 otherwise.
@@ -756,3 +928,31 @@ Tk_MacOSXIsAppInFront (void)
 {
     return tkMacOSXAppInFront;
 }
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ClearPort --
+ *
+ *	Clear (i.e. fill with transparent color) the given port.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+static void
+ClearPort(CGrafPtr port) {
+    CGContextRef context;
+    Rect bounds;
+    CGRect rect;
+
+    GetPortBounds(port, &bounds);
+    QDBeginCGContext(port, &context);
+    rect = CGRectMake(0, 0, bounds.right, bounds.bottom);
+    CGContextClearRect(context, rect);
+    QDEndCGContext(port, &context);
+}