Added method to draw an arrow shape like that of the BScrollBar.

TODO: Adjust BScrollBar to use it.
TODO: Make it virtual like the others, but I don't want to break Vision and
other native Haiku apps just now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29630 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/interface/ControlLook.h

@@ -48,6 +48,13 @@ public:
 								| B_TOP_BORDER | B_BOTTOM_BORDER
 	};
 
+	enum {
+		B_LEFT_ARROW		= 0,
+		B_RIGHT_ARROW		= 1,
+		B_UP_ARROW			= 2,
+		B_DOWN_ARROW		= 3
+	};
+
 	enum {
 		B_FOCUSED			= 1 << 0,
 		B_CLICKED			= 1 << 1, // some controls activate on mouse up
@@ -134,6 +141,13 @@ public:
 									const rgb_color& base, uint32 flags,
 									enum orientation orientation);
 
+	// TODO: Make virtual before R1 release
+			void				DrawArrowShape(BView* view,
+									BRect& rect, const BRect& updateRect,
+									const rgb_color& base, uint32 direction,
+									uint32 flags = 0,
+									float tint = B_DARKEN_MAX_TINT);
+
 	virtual	rgb_color			SliderBarColor(const rgb_color& base);
 
 	virtual void				DrawSliderBar(BView* view, BRect rect,