* macosx/tkMacOSXMouseEvent.c (GenerateMouseWheelEvent): enable

	processing of mousewheel events in background windows.

	* macosx/tkMacOSXScrlbr.c: modernize checks for active/front window.
	* macosx/tkMacOSXScale.c:
	* macosx/tkMacOSXWm.c:

	* macosx/tkMacOSXColor.c: factor out verbose #ifdef checks of
	* macosx/tkMacOSXDraw.c:  MAC_OS_X_VERSION_{MAX_ALLOWED,MIN_REQUIRED}
	* macosx/tkMacOSXEntry.c: and runtime checks of kHIToolboxVersion into
	* macosx/tkMacOSXEvent.c: new TK_{IF,ELSE,ENDIF}_MAC_OS_X macros.
	* macosx/tkMacOSXInit.c:
	* macosx/tkMacOSXInt.h:
	* macosx/tkMacOSXWm.c:

	* macosx/tkMacOSXDraw.c:  factor out clip clearing in QD ports;
	* macosx/tkMacOSXEntry.c: formatting cleanup.

10 files changed, 221 insertions, 261 deletions

diff --git a/macosx/tkMacOSXColor.c b/macosx/tkMacOSXColor.c
index 5a35086..5d4fb78 100644
--- a/macosx/tkMacOSXColor.c
+++ b/macosx/tkMacOSXColor.c
@@ -13,7 +13,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkMacOSXColor.c,v 1.2.2.6 2007/05/31 13:42:12 das Exp $
+ * RCS: @(#) $Id: tkMacOSXColor.c,v 1.2.2.7 2007/06/06 09:56:54 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -382,50 +382,34 @@ TkMacOSXSetColorInContext(unsigned long pixel, CGContextRef context)
 
     if (GetThemeFromPixelCode((pixel >> 24) & 0xff, &brush, &textColor,
 	    &background)) {
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
 	if (brush) {
-	    if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-		    && HIThemeSetFill != NULL && HIThemeSetStroke != NULL
-#endif
-	    ) {
+	    TK_IF_MAC_OS_X_API (4, HIThemeSetFill,
 		err = ChkErr(HIThemeSetFill, brush, NULL, context,
 			kHIThemeOrientationNormal);
-		if (err == noErr) {
+		TK_IF_MAC_OS_X_API_COND (4, err == noErr, HIThemeSetFill,
 		    err = ChkErr(HIThemeSetStroke, brush, NULL, context,
 			    kHIThemeOrientationNormal);
-		}
-	    }
+		) TK_ENDIF_MAC_OS_X
+	    ) TK_ENDIF_MAC_OS_X
 	} else if (textColor) {
-	    if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-		    && HIThemeSetTextFill != NULL
-#endif
-	    ) {
+	    TK_IF_MAC_OS_X_API (4, HIThemeSetTextFill,
 		err = ChkErr(HIThemeSetTextFill, textColor, NULL, context,
 			kHIThemeOrientationNormal);
-	    }
-	} else
-#endif /* MAC_OS_X_VERSION_MAX_ALLOWED >= 1040 */
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1030
-	if (background) {
-	    if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1030
-		    && CGContextGetClipBoundingBox != NULL
-		    && HIThemeApplyBackground != NULL
-		    && &kHIToolboxVersionNumber != NULL /* c.f. QA1377 */
-		    && kHIToolboxVersionNumber >= kHIToolboxVersionNumber10_3
-#endif
-	    ) {
+	    ) TK_ENDIF_MAC_OS_X
+	} else if (background) {
+	    TK_IF_MAC_OS_X_API (3, CGContextGetClipBoundingBox,
 		CGRect rect = CGContextGetClipBoundingBox(context);
 		HIThemeBackgroundDrawInfo info = { 0, kThemeStateActive,
 			background };
 
-		err = ChkErr(HIThemeApplyBackground, &rect, &info, context,
-			kHIThemeOrientationNormal);
-	    }
+		TK_IF_MAC_OS_X_API (3, HIThemeApplyBackground,
+		    TK_IF_MAC_OS_X_HI_TOOLBOX (3, /* c.f. QA1377 */
+			err = ChkErr(HIThemeApplyBackground, &rect, &info,
+				context, kHIThemeOrientationNormal);
+		    ) TK_ENDIF_MAC_OS_X
+		) TK_ENDIF_MAC_OS_X
+	    ) TK_ENDIF_MAC_OS_X
 	}
-#endif /* MAC_OS_X_VERSION_MAX_ALLOWED >= 1030 */
 	if (err == noErr) {
 	    return;
 	}
@@ -458,17 +442,9 @@ TkMacOSXSetColorInContext(unsigned long pixel, CGContextRef context)
 		    Tcl_Panic("TkMacOSXSetColorInContext(): "
 			"pattern initialization failed !");
 		}
-		bitmapInfo =
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
-			(1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-			&& &kHIToolboxVersionNumber != NULL
-			&& kHIToolboxVersionNumber >=
-				kHIToolboxVersionNumber10_4
-#endif
-			) ? kCGBitmapByteOrder32Host :
-#endif
-			0;
+		TK_IF_MAC_OS_X_HI_TOOLBOX (4,
+		    bitmapInfo = kCGBitmapByteOrder32Host;
+		) TK_ENDIF_MAC_OS_X
 	    }
 	    portChanged = QDSwapPort(patGWorld, &savePort);
 	    TkMacOSXSetColorInPort(pixel, 1, pixpat);
diff --git a/macosx/tkMacOSXDraw.c b/macosx/tkMacOSXDraw.c
index fb3d0c1..5b2ebbb 100644
--- a/macosx/tkMacOSXDraw.c
+++ b/macosx/tkMacOSXDraw.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: tkMacOSXDraw.c,v 1.2.2.24 2007/06/04 09:28:44 das Exp $
+ * RCS: @(#) $Id: tkMacOSXDraw.c,v 1.2.2.25 2007/06/06 09:56:54 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -41,7 +41,7 @@
 RgnHandle tkMacOSXtmpRgn1 = NULL;
 RgnHandle tkMacOSXtmpRgn2 = NULL;
 
-static PixPatHandle gPenPat = NULL;
+static PixPatHandle penPat = NULL;
 
 static int useCGDrawing = 1;
 static int tkMacOSXCGAntiAliasLimit = 0;
@@ -54,6 +54,7 @@ static int useThemedFrame = 0;
  * Prototypes for functions used only in this file.
  */
 static unsigned char InvertByte(unsigned char data);
+static void NoQDClip(CGrafPtr port);
 
 
 /*
@@ -207,13 +208,10 @@ XCopyArea(
     if (tkPictureIsOpen) {
 	/*
 	 * When rendering into a picture, after a call to "OpenCPicture"
-	 * the drawable clipping is incorrect, so clip to the whole window.
+	 * the drawable clipping is incorrect, so don't clip.
 	 */
 
-	Rect clpRect;
-
-	GetPortBounds(dstPort, &clpRect);
-	ClipRect(&clpRect);
+	NoQDClip(dstPort);
     }
     if (gc->clip_mask && ((TkpClipMask*)gc->clip_mask)->type
 	    == TKP_CLIP_REGION) {
@@ -237,9 +235,9 @@ XCopyArea(
     srcBit = GetPortBitMapForCopyBits(srcPort);
     dstBit = GetPortBitMapForCopyBits(dstPort);
     CopyBits(srcBit, dstBit, srcPtr, dstPtr, srcCopy, NULL);
+    SetClip(tkMacOSXtmpRgn2);
     RGBForeColor(&origForeColor);
     RGBBackColor(&origBackColor);
-    SetClip(tkMacOSXtmpRgn2);
     SetEmptyRgn(tkMacOSXtmpRgn2);
     if (portChanged) {
 	QDSwapPort(savePort, NULL);
@@ -302,13 +300,10 @@ XCopyPlane(
     if (tkPictureIsOpen) {
 	/*
 	 * When rendering into a picture, after a call to "OpenCPicture"
-	 * the drawable clipping is incorrect, so clip to the whole window.
+	 * the drawable clipping is incorrect, so don't clip.
 	 */
 
-	Rect clpRect;
-
-	GetPortBounds(dstPort, &clpRect);
-	ClipRect(&clpRect);
+	NoQDClip(dstPort);
 	dstPtr = &srcRect;
     } else {
 	dstPtr = &dstRect;
@@ -416,13 +411,10 @@ TkPutImage(
     if (tkPictureIsOpen) {
 	/*
 	 * When rendering into a picture, after a call to "OpenCPicture"
-	 * the drawable clipping is incorrect, so clip to the whole window.
+	 * the drawable clipping is incorrect, so don't clip.
 	 */
 
-	Rect clpRect;
-
-	GetPortBounds(destPort, &clpRect);
-	ClipRect(&clpRect);
+	NoQDClip(destPort);
 	destPtr = srcPtr;
     } else {
 	destPtr = &destRect;
@@ -1011,17 +1003,10 @@ XDrawArc(
 		macWin->xOff + x + o,
 		macWin->yOff + y + o,
 		width, height);
-
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
-	if (angle1 == 0 && angle2 == 23040
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-		&& CGContextStrokeEllipseInRect != NULL
-#endif
-	) {
+	TK_IF_MAC_OS_X_API_COND (4, angle1 == 0 && angle2 == 23040,
+		CGContextStrokeEllipseInRect,
 	    CGContextStrokeEllipseInRect(dc.context, rect);
-	} else
-#endif
-	{
+	) TK_ELSE_MAC_OS_X (4,
 	    CGMutablePathRef p = CGPathCreateMutable();
 	    CGAffineTransform t = CGAffineTransformIdentity;
 	    CGPoint c = CGPointMake(CGRectGetMidX(rect), CGRectGetMidY(rect));
@@ -1036,7 +1021,7 @@ XDrawArc(
 	    CGContextAddPath(dc.context, p);
 	    CGPathRelease(p);
 	    CGContextStrokePath(dc.context);
-	}
+	) TK_ENDIF_MAC_OS_X
     } else {
 	Rect theRect;
 	short start, extent;
@@ -1106,16 +1091,10 @@ XDrawArcs(
 		    macWin->yOff + arcPtr->y + o,
 		    arcPtr->width, arcPtr->height);
 
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
-	    if (arcPtr->angle1 == 0 && arcPtr->angle2 == 23040
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-		    && CGContextStrokeEllipseInRect != NULL
-#endif
-	    ) {
+	    TK_IF_MAC_OS_X_API_COND (4, arcPtr->angle1 == 0 &&
+		    arcPtr->angle2 == 23040, CGContextStrokeEllipseInRect,
 		CGContextStrokeEllipseInRect(dc.context, rect);
-	    } else
-#endif
-	    {
+	    ) TK_ELSE_MAC_OS_X (4,
 		CGMutablePathRef p = CGPathCreateMutable();
 		CGAffineTransform t = CGAffineTransformIdentity;
 		CGPoint c = CGPointMake(CGRectGetMidX(rect),
@@ -1134,7 +1113,7 @@ XDrawArcs(
 		CGContextAddPath(dc.context, p);
 		CGPathRelease(p);
 		CGContextStrokePath(dc.context);
-	    }
+	    ) TK_ENDIF_MAC_OS_X
 	}
     } else {
 	Rect theRect;
@@ -1204,16 +1183,10 @@ XFillArc(
 		macWin->yOff + y + o,
 		width - u, height - u);
 
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
-	if (angle1 == 0 && angle2 == 23040
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-		&& CGContextFillEllipseInRect != NULL
-#endif
-	) {
+	TK_IF_MAC_OS_X_API_COND (4, angle1 == 0 && angle2 == 23040,
+		CGContextFillEllipseInRect,
 	    CGContextFillEllipseInRect(dc.context, rect);
-	} else
-#endif
-	{
+	) TK_ELSE_MAC_OS_X (4,
 	    CGMutablePathRef p = CGPathCreateMutable();
 	    CGAffineTransform t = CGAffineTransformIdentity;
 	    CGPoint c = CGPointMake(CGRectGetMidX(rect), CGRectGetMidY(rect));
@@ -1232,7 +1205,7 @@ XFillArc(
 	    CGContextAddPath(dc.context, p);
 	    CGPathRelease(p);
 	    CGContextFillPath(dc.context);
-	}
+	) TK_ENDIF_MAC_OS_X
     } else {
 	Rect theRect;
 	short start, extent;
@@ -1328,17 +1301,10 @@ XFillArcs(
 		    macWin->xOff + arcPtr->x + o,
 		    macWin->yOff + arcPtr->y + o,
 		    arcPtr->width - u, arcPtr->height - u);
-
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
-	    if (arcPtr->angle1 == 0 && arcPtr->angle2 == 23040
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-		    && CGContextFillEllipseInRect != NULL
-#endif
-	    ) {
+	    TK_IF_MAC_OS_X_API_COND (4, arcPtr->angle1 == 0 &&
+		    arcPtr->angle2 == 23040, CGContextFillEllipseInRect,
 		CGContextFillEllipseInRect(dc.context, rect);
-	    } else
-#endif
-	    {
+	    ) TK_ELSE_MAC_OS_X (4,
 		CGMutablePathRef p = CGPathCreateMutable();
 		CGAffineTransform t = CGAffineTransformIdentity;
 		CGPoint c = CGPointMake(CGRectGetMidX(rect),
@@ -1361,7 +1327,7 @@ XFillArcs(
 		CGContextAddPath(dc.context, p);
 		CGPathRelease(p);
 		CGContextFillPath(dc.context);
-	    }
+	    ) TK_ENDIF_MAC_OS_X
 	}
     } else {
 	Rect theRect;
@@ -1479,11 +1445,11 @@ TkScrollWindow(
      * destination rects disjoint and non-aligned.
      */
 
-    SetRect(&srcRect, (short) (destDraw->xOff + x),
+    SetRect(&scrollRect, (short) (destDraw->xOff + x),
 	    (short) (destDraw->yOff + y),
 	    (short) (destDraw->xOff + x + width),
 	    (short) (destDraw->yOff + y + height));
-    scrollRect = srcRect;
+    srcRect = scrollRect;
     if (dx < 0) {
 	scrollRect.left += dx;
     } else {
@@ -1553,11 +1519,11 @@ TkMacOSXSetUpGraphicsPort(
 {
     PenNormal();
     if (gc) {
-	if (gPenPat == NULL) {
-	    gPenPat = NewPixPat();
+	if (penPat == NULL) {
+	    penPat = NewPixPat();
 	}
-	TkMacOSXSetColorInPort(gc->foreground, 1, gPenPat);
-	PenPixPat(gPenPat);
+	TkMacOSXSetColorInPort(gc->foreground, 1, penPat);
+	PenPixPat(penPat);
 	if(gc->function == GXxor) {
 	    PenMode(patXor);
 	}
@@ -1652,20 +1618,16 @@ TkMacOSXSetupDrawingContext(
 	}
     } else if (context) {
 	TkMacOSXCheckTmpRgnEmpty(1);
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1030
-	if (!port
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1030
-		&& CGContextGetClipBoundingBox != NULL
-#endif
-	) {
-	    CGRect r = CGContextGetClipBoundingBox(context);
-
-	    SetRect(&portBounds, r.origin.x + macDraw->xOff,
-		    r.origin.y + macDraw->yOff,
-		    r.origin.x + r.size.width + macDraw->xOff,
-		    r.origin.y + r.size.height + macDraw->yOff);
+	if (!port) {
+	    TK_IF_MAC_OS_X_API (3, CGContextGetClipBoundingBox,
+		CGRect r = CGContextGetClipBoundingBox(context);
+
+		SetRect(&portBounds, r.origin.x + macDraw->xOff,
+			r.origin.y + macDraw->yOff,
+			r.origin.x + r.size.width + macDraw->xOff,
+			r.origin.y + r.size.height + macDraw->yOff);
+	    ) TK_ENDIF_MAC_OS_X
 	}
-#endif
 	RectRgn(tkMacOSXtmpRgn1, &portBounds);
 	if (port) {
 	    TkMacOSXSetUpClippingRgn(d);
@@ -1758,12 +1720,12 @@ TkMacOSXSetupDrawingContext(
     } else {
 	ChkErr(GetThemeDrawingState, &(dc->saveState));
 	if (gc) {
-	    PixPatHandle savePat = gPenPat;
+	    PixPatHandle savePat = penPat;
 
-	    gPenPat = NULL;
+	    penPat = NULL;
 	    TkMacOSXSetUpGraphicsPort(gc, port);
-	    dc->penPat = gPenPat;
-	    gPenPat = savePat;
+	    dc->penPat = penPat;
+	    penPat = savePat;
 	    if (gc->clip_mask && ((TkpClipMask*)gc->clip_mask)->type
 			== TKP_CLIP_REGION) {
 		RgnHandle gcClipRgn = (RgnHandle)
@@ -1927,6 +1889,35 @@ TkpClipDrawableToRect(
 /*
  *----------------------------------------------------------------------
  *
+ * NoQDClip --
+ *
+ *	Helper function to setup a QD port to not clip anything.
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+NoQDClip(
+    CGrafPtr port)
+{
+    static RgnHandle noClipRgn = NULL;
+    
+    if (!noClipRgn) {
+	noClipRgn = NewRgn();
+	SetRectRgn(noClipRgn, SHRT_MIN, SHRT_MIN, SHRT_MAX, SHRT_MAX);
+    }
+    SetPortClipRegion(port, noClipRgn);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
  * TkMacOSXMakeStippleMap --
  *
  *	Given a drawable and a stipple pattern this function draws the
diff --git a/macosx/tkMacOSXEntry.c b/macosx/tkMacOSXEntry.c
index c412f31..8533932 100644
--- a/macosx/tkMacOSXEntry.c
+++ b/macosx/tkMacOSXEntry.c
@@ -53,7 +53,7 @@
  *	software in accordance with the terms specified in this
  *	license.
  *
- * RCS: @(#) $Id: tkMacOSXEntry.c,v 1.2.2.9 2007/06/04 09:28:44 das Exp $
+ * RCS: @(#) $Id: tkMacOSXEntry.c,v 1.2.2.10 2007/06/06 09:56:54 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -80,40 +80,37 @@ static ThemeButtonKind ComputeIncDecParameters (int height, int *width);
  *--------------------------------------------------------------
  */
 static ThemeButtonKind
-ComputeIncDecParameters (int height, int *width)
+ComputeIncDecParameters(int height, int *width)
 {
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1030
-    if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1030
-	    && &kHIToolboxVersionNumber != NULL
-	    && kHIToolboxVersionNumber >= kHIToolboxVersionNumber10_3
-#endif
-    ) {
+    ThemeButtonKind kind;
+
+    TK_IF_MAC_OS_X_HI_TOOLBOX (3,
 	if (height < 11 || height > 28) {
 	    *width = 0;
-	    return (ThemeButtonKind) 0;
-	}
-
-	if (height >= 21) {
-	    *width = 13;
-	    return kThemeIncDecButton;
-	} else if (height >= 18) {
-	    *width = 12;
-	    return kThemeIncDecButtonSmall;
+	    kind = (ThemeButtonKind) 0;
 	} else {
-	    *width = 11;
-	    return kThemeIncDecButtonMini;
+	    if (height >= 21) {
+		*width = 13;
+		kind = kThemeIncDecButton;
+	    } else if (height >= 18) {
+		*width = 12;
+		kind = kThemeIncDecButtonSmall;
+	    } else {
+		*width = 11;
+		kind = kThemeIncDecButtonMini;
+	    }
 	}
-    } else
-#endif
-    {
+    ) TK_ELSE_MAC_OS_X (3,
 	if (height < 21 || height > 28) {
 	    *width = 0;
-	    return (ThemeButtonKind) 0;
+	    kind = (ThemeButtonKind) 0;
+	} else {
+	    *width = 13;
+	    kind = kThemeIncDecButton;
 	}
-	*width = 13;
-	return kThemeIncDecButton;
-    }
+    ) TK_ENDIF_MAC_OS_X
+
+    return kind;
 }
 
 /*
diff --git a/macosx/tkMacOSXEvent.c b/macosx/tkMacOSXEvent.c
index ab275ae..807bae5 100644
--- a/macosx/tkMacOSXEvent.c
+++ b/macosx/tkMacOSXEvent.c
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkMacOSXEvent.c,v 1.3.2.12 2007/05/31 13:42:12 das Exp $
+ * RCS: @(#) $Id: tkMacOSXEvent.c,v 1.3.2.13 2007/06/06 09:56:54 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -41,22 +41,15 @@ TkMacOSXFlushWindows(void)
     WindowRef wRef = GetWindowList();
 
     while (wRef) {
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1030
-	if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1030
-		&& HIWindowFlush != NULL
-#endif
-	) {
+	TK_IF_MAC_OS_X_API (3, HIWindowFlush,
 	    ChkErr(HIWindowFlush, wRef);
-	} else
-#endif
-	{
+	) TK_ELSE_MAC_OS_X (3,
 	    CGrafPtr portPtr = GetWindowPort(wRef);
 
 	    if (QDIsPortBuffered(portPtr)) {
 		QDFlushPortBuffer(portPtr, NULL);
 	    }
-	}
+	) TK_ENDIF_MAC_OS_X
 	wRef = GetNextWindow(wRef);
     }
 }
diff --git a/macosx/tkMacOSXInit.c b/macosx/tkMacOSXInit.c
index 524306e..e523582 100644
--- a/macosx/tkMacOSXInit.c
+++ b/macosx/tkMacOSXInit.c
@@ -11,7 +11,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkMacOSXInit.c,v 1.3.2.21 2007/04/29 02:26:49 das Exp $
+ * RCS: @(#) $Id: tkMacOSXInit.c,v 1.3.2.22 2007/06/06 09:56:54 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -255,16 +255,10 @@ TkpInit(
 	    OSStatus err = procNotFound;
 	    ProcessSerialNumber psn = { 0, kCurrentProcess };
 
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1030
-	    if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1030
-		    && TransformProcessType != NULL
-#endif
-	    ) {
+	    TK_IF_MAC_OS_X_API (3, TransformProcessType,
 		err = ChkErr(TransformProcessType, &psn,
 			kProcessTransformToForegroundApplication);
-	    }
-#endif
+	    ) TK_ENDIF_MAC_OS_X
 #if MAC_OSX_TK_USE_CPS_SPI
 	    if (err != noErr) {
 		/*
diff --git a/macosx/tkMacOSXInt.h b/macosx/tkMacOSXInt.h
index ffc7bff..30cb431 100644
--- a/macosx/tkMacOSXInt.h
+++ b/macosx/tkMacOSXInt.h
@@ -10,7 +10,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkMacOSXInt.h,v 1.3.2.17 2007/05/09 12:57:46 das Exp $
+ * RCS: @(#) $Id: tkMacOSXInt.h,v 1.3.2.18 2007/06/06 09:56:54 das Exp $
  */
 
 #ifndef _TKMACINT
@@ -81,7 +81,69 @@
     #define kHIToolboxVersionNumber10_4 (219)
 #endif
 #ifndef kHIToolboxVersionNumber10_5
-    #define kHIToolboxVersionNumber10_5 (291)
+    #define kHIToolboxVersionNumber10_5 (303)
+#endif
+/* Macros for Mac OS X API availability checking */
+#define TK_IF_MAC_OS_X_API(vers, symbol, ...) \
+	tk_if_mac_os_x_10_##vers(1, symbol, 1, __VA_ARGS__)
+#define TK_IF_MAC_OS_X_API_COND(vers, cond, symbol,...) \
+	tk_if_mac_os_x_10_##vers(cond, symbol, 1, __VA_ARGS__)
+#define TK_IF_MAC_OS_X_HI_TOOLBOX(vers, ...) \
+	tk_if_mac_os_x_10_##vers(1, &kHIToolboxVersionNumber, \
+	kHIToolboxVersionNumber >= kHIToolboxVersionNumber10_##vers, \
+	__VA_ARGS__)
+#define TK_ELSE_MAC_OS_X(vers, ...) \
+	tk_else_mac_os_x_10_##vers(__VA_ARGS__)
+#define TK_ENDIF_MAC_OS_X \
+	}
+/* Private helper macros to implement the API checking above */
+#define tk_if_mac_os_x_yes(cond, symbol, postcond, ...) \
+	if (cond) { __VA_ARGS__
+#define tk_else_mac_os_x_yes(...) \
+	} else {
+#define tk_if_mac_os_x_chk(cond, symbol, postcond, ...) \
+	if ((cond) && (symbol) != NULL && (postcond)) { __VA_ARGS__
+#define tk_else_mac_os_x_chk(...) \
+	} else { __VA_ARGS__
+#define tk_if_mac_os_x_no(cond, symbol, postcond, ...) \
+	if (0) {
+#define tk_else_mac_os_x_no(...) \
+	} else { __VA_ARGS__
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1030
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1030
+#define tk_if_mac_os_x_10_3		tk_if_mac_os_x_yes
+#define tk_else_mac_os_x_10_3		tk_else_mac_os_x_yes
+#else
+#define tk_if_mac_os_x_10_3		tk_if_mac_os_x_chk
+#define tk_else_mac_os_x_10_3		tk_else_mac_os_x_chk
+#endif
+#else
+#define tk_if_mac_os_x_10_3		tk_if_mac_os_x_no
+#define tk_else_mac_os_x_10_3		tk_else_mac_os_x_no
+#endif
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1040
+#define tk_if_mac_os_x_10_4		tk_if_mac_os_x_yes
+#define tk_else_mac_os_x_10_4		tk_else_mac_os_x_yes
+#else
+#define tk_if_mac_os_x_10_4		tk_if_mac_os_x_chk
+#define tk_else_mac_os_x_10_4		tk_else_mac_os_x_chk
+#endif
+#else
+#define tk_if_mac_os_x_10_4		tk_if_mac_os_x_no
+#define tk_else_mac_os_x_10_4		tk_else_mac_os_x_no
+#endif
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1050
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
+#define tk_if_mac_os_x_10_5		tk_if_mac_os_x_yes
+#define tk_else_mac_os_x_10_5		tk_else_mac_os_x_yes
+#else
+#define tk_if_mac_os_x_10_5		tk_if_mac_os_x_chk
+#define tk_else_mac_os_x_10_5		tk_else_mac_os_x_chk
+#endif
+#else
+#define tk_if_mac_os_x_10_5		tk_if_mac_os_x_no
+#define tk_else_mac_os_x_10_5		tk_else_mac_os_x_no
 #endif
 
 /*
diff --git a/macosx/tkMacOSXMouseEvent.c b/macosx/tkMacOSXMouseEvent.c
index a44118d..d557ffd 100644
--- a/macosx/tkMacOSXMouseEvent.c
+++ b/macosx/tkMacOSXMouseEvent.c
@@ -54,7 +54,7 @@
  *	software in accordance with the terms specified in this
  *	license.
  *
- * RCS: @(#) $Id: tkMacOSXMouseEvent.c,v 1.6.2.19 2007/05/09 12:57:46 das Exp $
+ * RCS: @(#) $Id: tkMacOSXMouseEvent.c,v 1.6.2.20 2007/06/06 09:56:54 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -600,19 +600,14 @@ GenerateMouseWheelEvent(MouseEventData * medPtr)
     TkWindow  *winPtr;
     XEvent xEvent;
 
-    if ((!TkpIsWindowFloating(medPtr->whichWin)
-	    && (medPtr->activeNonFloating != medPtr->whichWin))) {
+    dispPtr = TkGetDisplayList();
+    rootwin = Tk_IdToWindow(dispPtr->display, medPtr->window);
+    if (rootwin == NULL) {
 	tkwin = NULL;
     } else {
-	dispPtr = TkGetDisplayList();
-	rootwin = Tk_IdToWindow(dispPtr->display, medPtr->window);
-	if (rootwin == NULL) {
-	    tkwin = NULL;
-	} else {
-	    tkwin = Tk_TopCoordsToWindow(rootwin,
-		    medPtr->local.h, medPtr->local.v,
-		    &xEvent.xbutton.x, &xEvent.xbutton.y);
-	}
+	tkwin = Tk_TopCoordsToWindow(rootwin,
+		medPtr->local.h, medPtr->local.v,
+		&xEvent.xbutton.x, &xEvent.xbutton.y);
     }
 
     /*
diff --git a/macosx/tkMacOSXScale.c b/macosx/tkMacOSXScale.c
index 283255f..3673c8b 100644
--- a/macosx/tkMacOSXScale.c
+++ b/macosx/tkMacOSXScale.c
@@ -11,7 +11,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkMacOSXScale.c,v 1.2.2.6 2007/04/29 02:26:50 das Exp $
+ * RCS: @(#) $Id: tkMacOSXScale.c,v 1.2.2.7 2007/06/06 09:56:54 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -267,11 +267,7 @@ TkpDisplayScale(
 		&(macScalePtr->scaleHandle));
 	SetControlReference(macScalePtr->scaleHandle, (UInt32) scalePtr);
 
-	/*
-	 * If we are foremost than make us active.
-	 */
-
-	if (windowRef == FrontWindow()) {
+	if (IsWindowActive(windowRef)) {
 	    macScalePtr->flags |= ACTIVE;
 	}
     } else {
diff --git a/macosx/tkMacOSXScrlbr.c b/macosx/tkMacOSXScrlbr.c
index 4d2cb07..539f9f7 100644
--- a/macosx/tkMacOSXScrlbr.c
+++ b/macosx/tkMacOSXScrlbr.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: tkMacOSXScrlbr.c,v 1.5.2.12 2007/05/09 12:57:46 das Exp $
+ * RCS: @(#) $Id: tkMacOSXScrlbr.c,v 1.5.2.13 2007/06/06 09:56:54 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -274,7 +274,6 @@ TkpDisplayScrollbar(
 
     if (macScrollPtr->sbHandle == NULL) {
 	Rect r = {0, 0, 1, 1};
-	WindowRef frontNonFloating;
 
 	windowRef = GetWindowFromPort(destPort);
 	CreateScrollBarControl(windowRef, &r, MIN_SCROLLBAR_VALUE +
@@ -283,13 +282,7 @@ TkpDisplayScrollbar(
 		MIN_SCROLLBAR_VALUE, true, NULL, &(macScrollPtr->sbHandle));
 	SetControlReference(macScrollPtr->sbHandle, (SInt32) scrollPtr);
 
-	/*
-	 * If we are foremost then make us active.
-	 */
-
-	frontNonFloating = ActiveNonFloatingWindow();
-
-	if ((windowRef == FrontWindow()) || TkpIsWindowFloating(windowRef)) {
+	if (IsWindowActive(windowRef)) {
 	    macScrollPtr->macFlags |= ACTIVE;
 	}
     }
diff --git a/macosx/tkMacOSXWm.c b/macosx/tkMacOSXWm.c
index 17aab68..d039109 100644
--- a/macosx/tkMacOSXWm.c
+++ b/macosx/tkMacOSXWm.c
@@ -13,7 +13,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkMacOSXWm.c,v 1.7.2.39 2007/06/04 09:28:45 das Exp $
+ * RCS: @(#) $Id: tkMacOSXWm.c,v 1.7.2.40 2007/06/06 09:56:54 das Exp $
  */
 
 #include "tkMacOSXInt.h"
@@ -808,17 +808,9 @@ static int WmSetAttribute(
 		err = ChkErr(FSPathMakeRef, (const unsigned char*) path, &ref,
 			&d);
 		if (err == noErr) {
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
-		    if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-			    && HIWindowSetProxyFSRef != NULL
-#endif
-		    ) {
+		    TK_IF_MAC_OS_X_API (4, HIWindowSetProxyFSRef,
 			err = ChkErr(HIWindowSetProxyFSRef, macWindow, &ref);
-		    } else
-#endif
-		    {
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
+		    ) TK_ELSE_MAC_OS_X (4,
 			AliasHandle alias;
 
 			err = ChkErr(FSNewAlias, NULL, &ref, &alias);
@@ -827,8 +819,7 @@ static int WmSetAttribute(
 				    alias);
 			    DisposeHandle((Handle) alias);
 			}
-#endif
-		    }
+		    ) TK_ENDIF_MAC_OS_X
 		}
 	    } else {
 		int len;
@@ -875,12 +866,7 @@ static int WmSetAttribute(
 		if (boolean) {
 		    wmPtr->flags |= WM_TRANSPARENT;
 		    wmPtr->attributes |= kWindowNoShadowAttribute;
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1030
-		    if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1030
-			    && HIWindowChangeFeatures != NULL
-#endif
-		    ) {
+		    TK_IF_MAC_OS_X_API (3, HIWindowChangeFeatures,
 			UInt32 features;
 
 			ChkErr(GetWindowFeatures, macWindow, &features);
@@ -888,8 +874,7 @@ static int WmSetAttribute(
 			    ChkErr(HIWindowChangeFeatures, macWindow, 0,
 				    kWindowIsOpaque);
 			}
-		    }
-#endif
+		    ) TK_ENDIF_MAC_OS_X
 		} else {
 		    wmPtr->flags &= ~WM_TRANSPARENT;
 		    wmPtr->attributes &= ~kWindowNoShadowAttribute;
@@ -950,17 +935,9 @@ static Tcl_Obj *WmGetAttribute(
 	    UInt8 path[PATH_MAX+1];
 	    OSStatus err;
 
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1040
-	    if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-		    && HIWindowSetProxyFSRef != NULL
-#endif
-	    ) {
+	    TK_IF_MAC_OS_X_API (4, HIWindowSetProxyFSRef,
 		err = ChkErr(HIWindowGetProxyFSRef, macWindow, &ref);
-	    } else
-#endif
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1040
-	    {
+	    ) TK_ELSE_MAC_OS_X (4,
 		Boolean wasChanged;
 		AliasHandle alias;
 
@@ -969,8 +946,7 @@ static Tcl_Obj *WmGetAttribute(
 		    err = ChkErr(FSResolveAlias, NULL, alias, &ref,
 			    &wasChanged);
 		}
-	    }
-#endif
+	    ) TK_ENDIF_MAC_OS_X
 	    if (err == noErr) {
 		err = ChkErr(FSRefMakePath, &ref, path, PATH_MAX);
 	    }
@@ -5790,8 +5766,7 @@ TkWmStackorderToplevel(parentPtr)
 	goto done;
     }
 
-    frontWindow = (WindowRef) FrontWindow();
-
+    frontWindow = GetFrontWindowOfClass(kAllWindowClasses, false);
     if (frontWindow == NULL) {
 	ckfree((char *) windows);
 	windows = NULL;
@@ -5800,11 +5775,11 @@ TkWmStackorderToplevel(parentPtr)
 	*window_ptr-- = NULL;
 	    while (frontWindow != NULL) {
 		    hPtr = Tcl_FindHashEntry(&table, (char *) frontWindow);
-	    if (hPtr != NULL) {
-		childWinPtr = (TkWindow *) Tcl_GetHashValue(hPtr);
-		*window_ptr-- = childWinPtr;
-	    }
-	    frontWindow = GetNextWindow(frontWindow);
+		if (hPtr != NULL) {
+		    childWinPtr = (TkWindow *) Tcl_GetHashValue(hPtr);
+		    *window_ptr-- = childWinPtr;
+		}
+		frontWindow = GetNextWindow(frontWindow);
 	    }
 	if (window_ptr != (windows-1))
 	    Tcl_Panic("num matched toplevel windows does not equal num "
@@ -5865,16 +5840,12 @@ ApplyWindowClassAttributeChanges(
 	    macWindow = GetWindowFromPort(TkMacOSXGetDrawablePort(
 		    winPtr->window));
 	}
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1030
-	if (wmPtr->macClass != oldClass
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1030
-		&& HIWindowChangeClass != NULL
-#endif
-	) {
-	    ChkErr(HIWindowChangeClass, macWindow, wmPtr->macClass);
+	if (wmPtr->macClass != oldClass) {
+	    TK_IF_MAC_OS_X_API (4, HIWindowChangeClass,
+		ChkErr(HIWindowChangeClass, macWindow, wmPtr->macClass);
+	    ) TK_ENDIF_MAC_OS_X
 	    ChkErr(GetWindowClass, macWindow, &(wmPtr->macClass));
 	}
-#endif
 	if (newAttributes != oldAttributes) {
 	    newAttributes &= GetAvailableWindowAttributes(wmPtr->macClass);
 	    ChkErr(ChangeWindowAttributes, macWindow,
@@ -6096,20 +6067,12 @@ TkMacOSXEnterExitFullscreen(
 	static SystemUIOptions fullscreenOptions = 0;
 
 	if (!fullscreenMode) {
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 1030
-	    if (1
-#if MAC_OS_X_VERSION_MIN_REQUIRED < 1030
-		    && &kHIToolboxVersionNumber != NULL
-		    && kHIToolboxVersionNumber >= kHIToolboxVersionNumber10_3
-#endif
-	    ) {
+	    TK_IF_MAC_OS_X_HI_TOOLBOX (3,
 		fullscreenMode = kUIModeAllSuppressed;
-	    } else
-#endif
-	    {
+	    ) TK_ELSE_MAC_OS_X (3,
 		fullscreenMode = kUIModeAllHidden;
 		fullscreenOptions = kUIOptionAutoShowMenuBar;
-	    }
+	    ) TK_ENDIF_MAC_OS_X
 	}
 	if (mode != fullscreenMode) {
 	    ChkErr(SetSystemUIMode, fullscreenMode, fullscreenOptions);