Tool System: experimental fallback tool support

Implement T66304 as an experimental option,
available under the preferences "Experimental" section.

- When enabled most tools in the 3D view have a gizmo.
- Dragging outside the gizmo uses the 'fallback' tool.
- The fallback tool can be changed or disabled in the tool options
  or from a pie menu (Alt-W).

1 files changed, 8 insertions, 0 deletions

diff --git a/source/blender/windowmanager/gizmo/WM_gizmo_types.h b/source/blender/windowmanager/gizmo/WM_gizmo_types.h
index 7bb77375934..d3aa333daea 100644
--- a/source/blender/windowmanager/gizmo/WM_gizmo_types.h
+++ b/source/blender/windowmanager/gizmo/WM_gizmo_types.h
@@ -120,6 +120,12 @@ typedef enum eWM_GizmoFlagGroupTypeFlag {
    * We could even move the options into the key-map item.
    * ~ campbell. */
   WM_GIZMOGROUPTYPE_TOOL_INIT = (1 << 6),
+
+  /**
+   * This gizmo type supports using the fallback tools keymap.
+   * #wmGizmoGroup.use_tool_fallback will need to be set too.
+   */
+  WM_GIZMOGROUPTYPE_TOOL_FALLBACK_KEYMAP = (1 << 7),
 } eWM_GizmoFlagGroupTypeFlag;
 
 /**
@@ -443,6 +449,8 @@ typedef struct wmGizmoGroup {
 
   bool tag_remove;
 
+  bool use_fallback_keymap;
+
   void *customdata;
   /** For freeing customdata from above. */
   void (*customdata_free)(void *);