Add support for the context help cursor.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@23708 72102866-910b-0410-8b05-ffd578937521

Source/NSCursor.m

@@ -353,7 +353,7 @@ backgroundColorHint:(NSColor *)bg
     }
   return cursor;
 }
-- (void)dealloc
+- (void) dealloc
 {
   RELEASE (_cursor_image);
   [super dealloc];
@@ -550,8 +550,10 @@ backgroundColorHint:(NSColor *)bg
     }
   else
     {
-      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &_is_set_on_mouse_entered];
-      [aDecoder decodeValueOfObjCType: @encode(BOOL) at: &_is_set_on_mouse_exited];
+      [aDecoder decodeValueOfObjCType: @encode(BOOL)
+				   at: &_is_set_on_mouse_entered];
+      [aDecoder decodeValueOfObjCType: @encode(BOOL)
+				   at: &_is_set_on_mouse_exited];
       _cursor_image = [aDecoder decodeObject];
       _hot_spot = [aDecoder decodePoint];
       [self _computeCid];

Source/NSHelpManager.m

@@ -39,6 +39,8 @@
 #include "AppKit/NSHelpManager.h"
 #include "AppKit/NSHelpPanel.h"
 #include "AppKit/NSHelpPanel.h"
+#include "AppKit/NSCursor.h"
+#include "AppKit/NSImage.h"
 #include "AppKit/NSGraphics.h"
 #include "AppKit/NSScrollView.h"
 #include "AppKit/NSTextView.h"
@@ -262,6 +264,7 @@
 
 static NSHelpManager *_gnu_sharedHelpManager = nil;
 static BOOL _gnu_contextHelpActive = NO;
+static NSCursor *helpCursor = nil;
 
 
 //
@@ -284,18 +287,31 @@ static BOOL _gnu_contextHelpActive = NO;
 
 + (void) setContextHelpModeActive: (BOOL) flag
 {
-  _gnu_contextHelpActive = flag;
-  if (flag)
+  if (flag != _gnu_contextHelpActive)
     {
-      [[NSNotificationCenter defaultCenter] 
-	postNotificationName: NSContextHelpModeDidActivateNotification 
-	object: [self sharedHelpManager]];
-    }
-  else
-    {
-      [[NSNotificationCenter defaultCenter] 
-	postNotificationName: NSContextHelpModeDidDeactivateNotification 
-	object: [self sharedHelpManager]];
+      _gnu_contextHelpActive = flag;
+      if (flag)
+	{
+	  if (helpCursor == nil)
+	    {
+	      helpCursor = [[NSCursor alloc]
+		initWithImage: [NSImage imageNamed: @"common_HelpCursor"]
+		hotSpot: NSMakePoint(8, 2)];
+	      [helpCursor setOnMouseEntered: NO];
+	      [helpCursor setOnMouseExited: NO];
+	    }
+	  [helpCursor push];
+	  [[NSNotificationCenter defaultCenter] 
+	    postNotificationName: NSContextHelpModeDidActivateNotification 
+	    object: [self sharedHelpManager]];
+	}
+      else
+	{
+	  [helpCursor pop];
+	  [[NSNotificationCenter defaultCenter] 
+	    postNotificationName: NSContextHelpModeDidDeactivateNotification 
+	    object: [self sharedHelpManager]];
+	}
     }
 }
 

Source/NSResponder.m

@@ -180,14 +180,16 @@
 
 - (void) helpRequested: (NSEvent*)theEvent
 {
-  if (![[NSHelpManager sharedHelpManager]
-	showContextHelpForObject: self
-	locationHint: [theEvent locationInWindow]])
-    if (_next_responder)
-      {
-	[_next_responder helpRequested: theEvent];
-	return;
-      }
+  if ([[NSHelpManager sharedHelpManager]
+    showContextHelpForObject: self
+    locationHint: [theEvent locationInWindow]] == NO)
+    {
+      if (_next_responder)
+	{
+	  [_next_responder helpRequested: theEvent];
+	  return;
+	}
+    }
   [NSHelpManager setContextHelpModeActive: NO];
 }