Event System: remove tweak events in favor of click-drag

Supporting two kinds of dragging is redundant, remove tweak events as
they only supported 3 mouse buttons and added complexity from using the
'value' to store directions.

Support only click-drag events (KM_CLICK_DRAG) which can be used with
any keyboard or mouse button.

Details:

- A "direction" member has been added to keymap items and events which
  can be used when the event value is set to KM_CLICK_DRAG.

- Keymap items are version patched.

- Loading older key-maps are also updated.

- Currently the key-maps stored in ./release/scripts/presets/keyconfig/
  still reference tweak events & need updating. For now they are updated
  on load.

Note that in general this wont impact add-ons as modal operators don't
receive tweak events.

Reviewed By: brecht

Ref D14214

1 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/windowmanager/WM_types.h b/source/blender/windowmanager/WM_types.h
index 26462402e3d..b2e214782f0 100644
--- a/source/blender/windowmanager/WM_types.h
+++ b/source/blender/windowmanager/WM_types.h
@@ -494,7 +494,6 @@ typedef struct wmNotifier {
 /* ************** Gesture Manager data ************** */
 
 /* wmGesture->type */
-#define WM_GESTURE_TWEAK 0
 #define WM_GESTURE_LINES 1
 #define WM_GESTURE_RECT 2
 #define WM_GESTURE_CROSS_RECT 3
@@ -504,7 +503,6 @@ typedef struct wmNotifier {
 
 /**
  * wmGesture is registered to #wmWindow.gesture, handled by operator callbacks.
- * Tweak gesture is builtin feature.
  */
 typedef struct wmGesture {
   struct wmGesture *next, *prev;
@@ -660,6 +658,9 @@ typedef struct wmEvent {
    */
   uint8_t modifier;
 
+  /** The direction (for #KM_CLICK_DRAG events only). */
+  int8_t direction;
+
   /** Raw-key modifier (allow using any key as a modifier). */
   short keymodifier;