* Headers/Additions/GNUstepGUI/GSTheme.h:

* Source/GSTheme.m:
Declare GSSliderHorizontalTrack and GSSliderVerticalTrack
part names for themeing the background of NSSlider
* Source/GSThemeDrawing.m:
Add new drawSliderBorderAndBackground:frame:inCell:isHorizontal:
method to draw the slider border and background.
* Source/GSThemePrivate.h:
* Source/GSThemeTools.m:
Add a -size method on GSDrawTiles which returns the total
original size of the tiles, so we can easily compute a rect
that scales the tiles in only one dimension.
* Source/NSSliderCell.m:
Override _drawBorderAndBackgroundWithFrame: to call new
GSTheme method. Also, tweak the knob drawing code; the knob
is now centered and drawn at its native size. This still looks
correct with the default slider sizes create by Gorm.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@37185 72102866-910b-0410-8b05-ffd578937521

Source/GSThemeTools.m

@@ -1609,5 +1609,18 @@ withRepeatedImage: (NSImage*)image
   style = aStyle;
 }
 
+- (NSSize) size
+{
+  const CGFloat width = rects[TileCL].size.width
+    + rects[TileCM].size.width
+    + rects[TileCR].size.width;
+
+  const CGFloat height = rects[TileTM].size.height
+    + rects[TileCM].size.height
+    + rects[TileBM].size.height;
+
+  return NSMakeSize(width, height);
+}
+
 @end