Solving ancient Blender window sizing issue;

- Removed grid-snapping for area coordinates on scaling windows. 
  That caused the areas to shrink or expand, and eventually corrupt screen layouts.

- Added simple but efficient life resize for OSX. I need to know why this is so much
  code for Windows... I suggest Windows to just copy same method; dispatch the queue,
  and just let the event system draw.

2 files changed, 11 insertions, 4 deletions

diff --git a/source/blender/editors/screen/screen_edit.c b/source/blender/editors/screen/screen_edit.c
index e3c5161463b..39bc31c35cf 100644
--- a/source/blender/editors/screen/screen_edit.c
+++ b/source/blender/editors/screen/screen_edit.c
@@ -664,15 +664,15 @@ static void screen_test_scale(bScreen *sc, int winsizex, int winsizey)
 			 * need some way to store these as floats internally and re-apply from there. */
 			tempf = ((float)sv->vec.x) * facx;
 			sv->vec.x = (short)(tempf + 0.5f);
-			sv->vec.x += AREAGRID - 1;
-			sv->vec.x -=  (sv->vec.x % AREAGRID);
+			//sv->vec.x += AREAGRID - 1;
+			//sv->vec.x -=  (sv->vec.x % AREAGRID);
 
 			CLAMP(sv->vec.x, 0, winsizex);
 			
 			tempf = ((float)sv->vec.y) * facy;
 			sv->vec.y = (short)(tempf + 0.5f);
-			sv->vec.y += AREAGRID - 1;
-			sv->vec.y -=  (sv->vec.y % AREAGRID);
+			//sv->vec.y += AREAGRID - 1;
+			//sv->vec.y -=  (sv->vec.y % AREAGRID);
 
 			CLAMP(sv->vec.y, 0, winsizey);
 		}
diff --git a/source/blender/windowmanager/intern/wm_window.c b/source/blender/windowmanager/intern/wm_window.c
index fe419010780..282e14cc5fe 100644
--- a/source/blender/windowmanager/intern/wm_window.c
+++ b/source/blender/windowmanager/intern/wm_window.c
@@ -900,6 +900,13 @@ static int ghost_event_proc(GHOST_EventHandle evt, GHOST_TUserDataPtr C_void_ptr
 						wm_draw_window_clear(win);
 						WM_event_add_notifier(C, NC_SCREEN | NA_EDITED, NULL);
 						WM_event_add_notifier(C, NC_WINDOW | NA_EDITED, NULL);
+						
+#if defined(__APPLE__)
+						/* OSX doesn't return to the mainloop while resize */
+						wm_event_do_handlers(C);
+						wm_event_do_notifiers(C);
+						wm_draw_update(C);
+#endif
 					}
 				}
 				break;