UI: ignore events in empty region overlap areas

- Resizable areas use 2D view bounds.
- Header uses the button bounds.
- A margin is added to avoid clicking between buttons.
- Region resize edges clamp to the 2D view bounds.

Resovles T61554

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_screen.h b/source/blender/editors/include/ED_screen.h
index 5d9c493737c..00771142553 100644
--- a/source/blender/editors/include/ED_screen.h
+++ b/source/blender/editors/include/ED_screen.h
@@ -403,6 +403,18 @@ void ED_region_generic_tools_region_message_subscribe(const struct bContext *C,
                                                       struct wmMsgBus *mbus);
 int ED_region_generic_tools_region_snap_size(const struct ARegion *ar, int size, int axis);
 
+/* area_query.c */
+bool ED_region_overlap_isect_x(const ARegion *ar, const int event_x);
+bool ED_region_overlap_isect_y(const ARegion *ar, const int event_y);
+bool ED_region_overlap_isect_xy(const ARegion *ar, const int event_xy[2]);
+bool ED_region_overlap_isect_x_with_margin(const ARegion *ar, const int event_x, const int margin);
+bool ED_region_overlap_isect_y_with_margin(const ARegion *ar, const int event_y, const int margin);
+bool ED_region_overlap_isect_xy_with_margin(const ARegion *ar,
+                                            const int event_xy[2],
+                                            const int margin);
+
+bool ED_region_contains_xy(const struct ARegion *ar, const int event_xy[2]);
+
 /* interface_region_hud.c */
 struct ARegionType *ED_area_type_hud(int space_type);
 void ED_area_type_hud_clear(struct wmWindowManager *wm, ScrArea *sa_keep);