fix for crash with toggle-drag on a popup (when the popup is closed while dragging).

2 files changed, 18 insertions, 0 deletions

diff --git a/source/blender/windowmanager/WM_api.h b/source/blender/windowmanager/WM_api.h
index 585201bc559..9830dcb9e9f 100644
--- a/source/blender/windowmanager/WM_api.h
+++ b/source/blender/windowmanager/WM_api.h
@@ -159,6 +159,9 @@ void		WM_event_remove_ui_handler(ListBase *handlers,
                                        void (*remove)(struct bContext *C, void *userdata),
                                        void *userdata, const bool postpone);
 void		WM_event_remove_area_handler(struct ListBase *handlers, void *area);
+void		WM_event_free_ui_handler_all(struct bContext *C, ListBase *handlers,
+                                         int (*func)(struct bContext *C, const struct wmEvent *event, void *userdata),
+                                         void (*remove)(struct bContext *C, void *userdata));
 
 struct wmEventHandler *WM_event_add_modal_handler(struct bContext *C, struct wmOperator *op);
 void		WM_event_remove_handlers(struct bContext *C, ListBase *handlers);
diff --git a/source/blender/windowmanager/intern/wm_event_system.c b/source/blender/windowmanager/intern/wm_event_system.c
index 89dc6ccc038..03a1785541e 100644
--- a/source/blender/windowmanager/intern/wm_event_system.c
+++ b/source/blender/windowmanager/intern/wm_event_system.c
@@ -2476,6 +2476,21 @@ void WM_event_remove_ui_handler(ListBase *handlers,
 	}
 }
 
+void WM_event_free_ui_handler_all(bContext *C, ListBase *handlers,
+                                  wmUIHandlerFunc func, wmUIHandlerRemoveFunc remove)
+{
+	wmEventHandler *handler, *handler_next;
+
+	for (handler = handlers->first; handler; handler = handler_next) {
+		handler_next = handler->next;
+		if (handler->ui_handle == func && handler->ui_remove == remove) {
+			remove(C, handler->ui_userdata);
+			BLI_remlink(handlers, handler);
+			wm_event_free_handler(handler);
+		}
+	}
+}
+
 wmEventHandler *WM_event_add_dropbox_handler(ListBase *handlers, ListBase *dropboxes)
 {
 	wmEventHandler *handler;