WM: use different drag thresholds for mouse/tablet events

Now a small threshold is used for mouse input,
avoiding delay when gizmos are activated on drag.

Tablet input threshold remains unchanged since
it's easier to make small movements when using a tablet.

A larger threshold for non-cursor input is now used (typically keyboard)
which improves usability when the "Pie Menu on Drag" key-map preference.

1 files changed, 13 insertions, 2 deletions

diff --git a/source/blender/windowmanager/intern/wm_event_system.c b/source/blender/windowmanager/intern/wm_event_system.c
index 7aad89a4bdb..387bc949da8 100644
--- a/source/blender/windowmanager/intern/wm_event_system.c
+++ b/source/blender/windowmanager/intern/wm_event_system.c
@@ -5191,9 +5191,20 @@ bool WM_window_modal_keymap_status_draw(bContext *UNUSED(C), wmWindow *win, uiLa
  *
  * \{ */
 
-int WM_event_drag_threshold(const struct wmEvent *UNUSED(event))
+int WM_event_drag_threshold(const struct wmEvent *event)
 {
-  return (int)((float)U.tweak_threshold * U.dpi_fac);
+  int drag_threshold;
+  if (WM_event_is_tablet(event)) {
+    drag_threshold = U.drag_threshold_tablet;
+  }
+  else if (ISMOUSE(event->prevtype)) {
+    drag_threshold = U.drag_threshold_mouse;
+  }
+  else {
+    /* Typically keyboard, could be NDOF button or other less common types. */
+    drag_threshold = U.drag_threshold;
+  }
+  return drag_threshold * U.dpi_fac;
 }
 
 bool WM_event_drag_test_with_delta(const wmEvent *event, const int drag_delta[2])