View2D - Zoom + More Scrollbar work

* Added basic (non-modal) zoom operators that use a uniform scale factor, with zoom centered using the view center as scaling point. Use Scrollwheel up/down and Pad +/- to use this.

* Added back the 'button'/bubble for the scrollbars. I've added dark lines on either end of it for some later work on zooming widgets.
This is not the final form they'll take. I still need to decide how to handle those scrollbars which act as grid-markers too (showing timescale, etc.), before trying to integrate that with some fancy scrollbar drawing (rounded, etc.)

Assorted changes:
* Moved vertical scrollbar for Outliner to right hand side
* Made Timeline use standard scrollbars, and turned on various clamping options
* Fixed ortho-matrix corrections for scrollbars, and added pixel offsets
* Made Timeline markers sit more snugly on the scrollbar. They were a bit far out...
* Fixed memory leak with view2d keymaps not being freed when Blender exited

1 files changed, 18 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_view2d_types.h b/source/blender/makesdna/DNA_view2d_types.h
index 0a44b6b8759..683a40a3682 100644
--- a/source/blender/makesdna/DNA_view2d_types.h
+++ b/source/blender/makesdna/DNA_view2d_types.h
@@ -82,5 +82,23 @@ typedef struct View2D {
 	/* width */
 #define SCROLLB	16
 
+/* scrollbar flags for View2D */
+	/* left scrollbar */
+#define L_SCROLL 		(1<<0)		
+#define R_SCROLL 		(1<<1)
+#define VERT_SCROLL 	(L_SCROLL|R_SCROLL)
+	/* horizontal scrollbar */
+#define T_SCROLL 		(1<<2)
+#define B_SCROLL 		(1<<3)
+#define HOR_SCROLL  	(T_SCROLL|B_SCROLL)
+	/* special hacks for outliner hscroll - prevent hanging older versions of Blender */
+#define B_SCROLLO   	(1<<4)
+#define HOR_SCROLLO 	(T_SCROLL|B_SCROLLO)
+	/* scale markings */
+#define LGRID_SCROLL	(1<<5)
+#define RGRID_SCROLL	(1<<6)
+#define BGRID_SCROLL	(1<<7)
+#define TGRID_SCROLL	(1<<8)	
+
 #endif