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, 6 insertions, 3 deletions

diff --git a/source/blender/editors/space_view3d/view3d_navigate_dolly.c b/source/blender/editors/space_view3d/view3d_navigate_dolly.c
index 06b616e71da..7b6b119294d 100644
--- a/source/blender/editors/space_view3d/view3d_navigate_dolly.c
+++ b/source/blender/editors/space_view3d/view3d_navigate_dolly.c
@@ -50,9 +50,12 @@ void viewdolly_modal_keymap(wmKeyConfig *keyconf)
 
   /* disabled mode switching for now, can re-implement better, later on */
 #if 0
-  WM_modalkeymap_add_item(keymap, LEFTMOUSE, KM_RELEASE, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ROTATE);
-  WM_modalkeymap_add_item(keymap, LEFTCTRLKEY, KM_RELEASE, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ROTATE);
-  WM_modalkeymap_add_item(keymap, LEFTSHIFTKEY, KM_PRESS, KM_ANY, 0, VIEWROT_MODAL_SWITCH_MOVE);
+  WM_modalkeymap_add_item(
+      keymap, LEFTMOUSE, KM_RELEASE, KM_ANY, 0, KM_ANY, VIEWROT_MODAL_SWITCH_ROTATE);
+  WM_modalkeymap_add_item(
+      keymap, LEFTCTRLKEY, KM_RELEASE, KM_ANY, 0, KM_ANY, VIEWROT_MODAL_SWITCH_ROTATE);
+  WM_modalkeymap_add_item(
+      keymap, LEFTSHIFTKEY, KM_PRESS, KM_ANY, 0, KM_ANY, VIEWROT_MODAL_SWITCH_MOVE);
 #endif
 
   /* assign map to operators */