WM: de-duplicate cursor motion checks for selection picking

Replace local static mouse coordinate storage with a single function.
also resolve inconsistencies.

- Edit-mesh selection used equality check (ignoring `U.move_threshold`).
- Motion to clear tooltips checked the value without scaling by the DPI.

Also prevent the unlikely case of the previous motion check matching
a different area by resetting the value when the active region changes.

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/windowmanager/WM_api.h b/source/blender/windowmanager/WM_api.h
index b5acecc4762..59e03f472f0 100644
--- a/source/blender/windowmanager/WM_api.h
+++ b/source/blender/windowmanager/WM_api.h
@@ -937,6 +937,7 @@ bool WM_event_is_modal_tweak_exit(const struct wmEvent *event, int tweak_event);
 bool WM_event_is_last_mousemove(const struct wmEvent *event);
 bool WM_event_is_mouse_drag(const struct wmEvent *event);
 bool WM_event_is_mouse_drag_or_press(const wmEvent *event);
+bool WM_cursor_test_motion_and_update(const int mval[2]) ATTR_NONNULL(1) ATTR_WARN_UNUSED_RESULT;
 
 int WM_event_drag_threshold(const struct wmEvent *event);
 bool WM_event_drag_test(const struct wmEvent *event, const int prev_xy[2]);