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, 1 insertions, 1 deletions

diff --git a/source/blender/windowmanager/intern/wm_operators.c b/source/blender/windowmanager/intern/wm_operators.c
index 6b8f7309d80..6e0bf911555 100644
--- a/source/blender/windowmanager/intern/wm_operators.c
+++ b/source/blender/windowmanager/intern/wm_operators.c
@@ -911,9 +911,9 @@ int WM_generic_select_modal(bContext *C, wmOperator *op, const wmEvent *event)
 
       ret_value = op->type->exec(C, op);
       OPERATOR_RETVAL_CHECK(ret_value);
-
       op->customdata = POINTER_FROM_INT((int)event->type);
       if (ret_value & OPERATOR_RUNNING_MODAL) {
+        printf("Starting modal: %s\n", op->idname);
         WM_event_add_modal_handler(C, op);
       }
       return ret_value | OPERATOR_PASS_THROUGH;