Added basic implementation for window alpha handling.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@20697 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,12 @@
+2005-02-12  Fred Kiefer <FredKiefer@gmx.de>
+
+	* Headers/Additions/GNUstepGUI/GSDisplayServer.h (-setalpha::): Declare.
+	* Source/GSDisplayServer.m (-setalpha::): New method for window
+	alpha setting, with empty default implementation.
+	* Source/NSWindow.m (-setAlphaValue:): Implemented alpha setting
+	via display server.
+	(-_initDefaults): Set _alphaValue to 1.0.
+
 2005-02-12  Fred Kiefer <FredKiefer@gmx.de>
 
 	* Model/GMAppKit.m (NSButtonCell-initWithModelUnarchiver:):

Headers/Additions/GNUstepGUI/GSDisplayServer.h

@@ -142,6 +142,7 @@ APPKIT_EXPORT NSString * GSScreenNumber;
 - (void) docedited: (int) edited : (int) win;
 - (void) setinputstate: (int)state : (int)win;
 - (void) setinputfocus: (int) win;
+- (void) setalpha: (float)alpha: (int) win;
 
 - (NSPoint) mouselocation;
 - (NSPoint) mouseLocationOnScreen: (int)aScreen window: (int *)win;

Source/GSDisplayServer.m

@@ -706,6 +706,12 @@ GSCurrentServer(void)
   [self subclassResponsibility: _cmd];
 }
 
+/** Sets the transparancy value for the whole window */
+- (void) setalpha: (float)alpha: (int) win
+{
+  //[self subclassResponsibility: _cmd];
+}
+
 /** Returns the current mouse location on the default screen. If the
     pointer is not on the default screen, an invalid point (-1,-1} is
     returned. */

Source/NSWindow.m

@@ -1106,8 +1106,11 @@ many times.
 
 - (void) setAlphaValue: (float)windowAlpha
 {
-  // FIXME
   _alphaValue = windowAlpha;
+  if (_windowNum)
+    {
+      [GSServerForWindow(self) setalpha: _alphaValue : _windowNum];
+    }
 }
 
 - (float) alphaValue
@@ -4209,7 +4212,7 @@ resetCursorRectsForView(NSView *theView)
 
   _depthLimit = NSDefaultDepth;
   _disableFlushWindow = 0;
-  _alphaValue = 0.0;
+  _alphaValue = 1.0;
 
   _f.is_one_shot = NO;
   _f.is_autodisplay = YES;