* generic/tkCanvas.c: allow -selectforeground option to be None; add

	* generic/tkCanvText.c:	fallback to fgColor when selFgColor is None
	* generic/tkEntry.c:	(new default on aqua to match native L&F).
	* generic/tkListbox.c:
	* generic/tkText.c:

	* generic/tkCanvas.c:	   add support for bypassing all of Tk's double
	* generic/tkEntry.c:	   buffered drawing into intermediate pixmaps
	* generic/tkFrame.c:	   (via TK_NO_DOUBLE_BUFFERING #define), it is
	* generic/tkListbox.c:	   unnecessary & wasteful on aqua where all
	* generic/tkPanedWindow.c: drawing is already double-buffered by the
	* generic/tkTextDisp.c:	   window server. (Use of this on other
	* generic/ttk/ttkWidget.c: platforms would only require implementation
	* unix/tkUnixScale.c:	   of TkpClipDrawableToRect()).

1 files changed, 25 insertions, 8 deletions

diff --git a/generic/tkCanvas.c b/generic/tkCanvas.c
index 34454bb..3a60a2b 100644
--- a/generic/tkCanvas.c
+++ b/generic/tkCanvas.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: tkCanvas.c,v 1.42 2007/04/17 15:24:48 dkf Exp $
+ * RCS: @(#) $Id: tkCanvas.c,v 1.43 2007/04/23 21:15:18 das Exp $
  */
 
 /* #define USE_OLD_TAG_SEARCH 1 */
@@ -21,6 +21,11 @@
 #include "tkInt.h"
 #include "tkPort.h"
 #include "tkCanvas.h"
+#ifdef TK_NO_DOUBLE_BUFFERING
+#ifdef MAC_OSX_TK
+#include "tkMacOSXInt.h"
+#endif
+#endif /* TK_NO_DOUBLE_BUFFERING */
 
 /*
  * See tkCanvas.h for key data structures used to implement canvases.
@@ -177,10 +182,10 @@ static Tk_ConfigSpec configSpecs[] = {
 	TK_CONFIG_MONO_ONLY},
     {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
 	DEF_CANVAS_SELECT_FG_COLOR, Tk_Offset(TkCanvas, textInfo.selFgColorPtr),
-	TK_CONFIG_COLOR_ONLY},
+	TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK},
     {TK_CONFIG_COLOR, "-selectforeground", "selectForeground", "Background",
 	DEF_CANVAS_SELECT_FG_MONO, Tk_Offset(TkCanvas, textInfo.selFgColorPtr),
-	TK_CONFIG_MONO_ONLY},
+	TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK},
     {TK_CONFIG_CUSTOM, "-state", "state", "State",
 	"normal", Tk_Offset(TkCanvas, canvas_state), TK_CONFIG_DONT_SET_DEFAULT,
 	&stateOption},
@@ -2132,6 +2137,10 @@ DisplayCanvas(
 	    goto borders;
 	}
 
+	width = screenX2 - screenX1;
+	height = screenY2 - screenY1;
+
+#ifndef TK_NO_DOUBLE_BUFFERING
 	/*
 	 * Redrawing is done in a temporary pixmap that is allocated here and
 	 * freed at the end of the function. All drawing is done to the
@@ -2166,14 +2175,19 @@ DisplayCanvas(
 	    (screenX2 + 30 - canvasPtr->drawableXOrigin),
 	    (screenY2 + 30 - canvasPtr->drawableYOrigin),
 	    Tk_Depth(tkwin));
+#else
+	canvasPtr->drawableXOrigin = canvasPtr->xOrigin;
+	canvasPtr->drawableYOrigin = canvasPtr->yOrigin;
+	pixmap = Tk_WindowId(tkwin);
+	TkpClipDrawableToRect(Tk_Display(tkwin), pixmap,
+		screenX1 - canvasPtr->xOrigin, screenY1 - canvasPtr->yOrigin,
+		width, height);
+#endif /* TK_NO_DOUBLE_BUFFERING */
 
 	/*
 	 * Clear the area to be redrawn.
 	 */
 
-	width = screenX2 - screenX1;
-	height = screenY2 - screenY1;
-
 	XFillRectangle(Tk_Display(tkwin), pixmap, canvasPtr->pixmapGC,
 		screenX1 - canvasPtr->drawableXOrigin,
 		screenY1 - canvasPtr->drawableYOrigin, (unsigned int) width,
@@ -2211,6 +2225,7 @@ DisplayCanvas(
 		    height);
 	}
 
+#ifndef TK_NO_DOUBLE_BUFFERING
 	/*
 	 * Copy from the temporary pixmap to the screen, then free up the
 	 * temporary pixmap.
@@ -2220,10 +2235,12 @@ DisplayCanvas(
 		canvasPtr->pixmapGC,
 		screenX1 - canvasPtr->drawableXOrigin,
 		screenY1 - canvasPtr->drawableYOrigin,
-		(unsigned) (screenX2 - screenX1),
-		(unsigned) (screenY2 - screenY1),
+		(unsigned int) width, (unsigned int) height,
 		screenX1 - canvasPtr->xOrigin, screenY1 - canvasPtr->yOrigin);
 	Tk_FreePixmap(Tk_Display(tkwin), pixmap);
+#else
+	TkpClipDrawableToRect(Tk_Display(tkwin), pixmap, 0, 0, -1, -1);
+#endif /* TK_NO_DOUBLE_BUFFERING */
     }
 
     /*