* Added a basic tool tip API, and implementation.

* The BView API can probably be regarded as good enough; the implementation
  might need to be improved over time (also, some things as archivability
  aren't fully implemented yet). The ToolTip.h header should get public once
  finalized.
* Added new B_MOUSE_IDLE message that is sent to a BView after a certain
  time has passed (BToolTipManager::ShowDelay()).
* Added small test app (ToolTipTest) that shows what is already working.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32078 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/interface/View.h

@@ -124,6 +124,7 @@ class BScrollView;
 class BShape;
 class BShelf;
 class BString;
+class BToolTip;
 class BWindow;
 struct _array_data_;
 struct _array_hdr_;
@@ -503,7 +504,6 @@ public:
 
 	virtual	void			DrawAfterChildren(BRect r);
 
-
 			// layout related
 
 	virtual	BSize			MinSize();
@@ -542,6 +542,19 @@ public:
 protected:
 	virtual	void			DoLayout();
 
+public:
+			// tool tip support
+
+			void			SetToolTip(const char* text);
+			void			SetToolTip(BToolTip* tip);
+			BToolTip*		ToolTip() const;
+
+			void			ShowToolTip(BToolTip* tip = NULL);
+			void			HideToolTip();
+
+protected:
+	virtual bool			GetToolTipAt(BPoint point, BToolTip** _tip);
+
 private:
 			void			_Layout(bool force, BLayoutContext* context);
 
@@ -556,7 +569,6 @@ private:
 	friend class BTabView;
 	friend class BWindow;
 
-	virtual	void			_ReservedView11();
 	virtual	void			_ReservedView12();
 	virtual	void			_ReservedView13();
 	virtual	void			_ReservedView14();
@@ -653,8 +665,10 @@ private:
 			uint32			fMouseEventOptions;
 
 			LayoutData*		fLayoutData;
+			BToolTip*		fToolTip;
+			BToolTip*		fVisibleToolTip;
 
-			uint32			_reserved[7];
+			uint32			_reserved[5];
 };