2.5

Added screen-set notifier. Works for arrow keys now. For those who
know the messy old code, admire the simple 2-function call method
now :) Only context setting is messy a bit, that'll be solved.

Also: removed redundant code, and move freeing window handlers up
one level; windows can keep their handlers while screen switches.

source/blender/editors/include/ED_screen.h

@@ -72,6 +72,7 @@ void	ED_screen_do_listen(struct wmWindow *win, struct wmNotifier *note);
 bScreen *ED_screen_duplicate(struct wmWindow *win, struct bScreen *sc);
 void	ED_screen_set_subwinactive(struct wmWindow *win, struct wmEvent *event);
 void	ED_screen_exit(struct bContext *C, struct wmWindow *window, struct bScreen *screen);
+void	ED_screen_set(struct bContext *C, struct bScreen *sc);
 
 void	ED_operatortypes_screen(void);
 void	ED_keymap_screen(struct wmWindowManager *wm);

source/blender/editors/screen/screen_edit.c

@@ -1048,7 +1048,6 @@ void ED_screen_exit(bContext *C, wmWindow *window, bScreen *screen)
 	for(sa= screen->areabase.first; sa; sa= sa->next)
 		ED_area_exit(C, sa);
 
-	WM_event_remove_handlers(C, &window->handlers);
 	C->window= prevwin;
 }
 
@@ -1153,3 +1152,31 @@ int ED_screen_area_active(const bContext *C)
 	}	
 	return 0;
 }
+
+/* operator call, WM + Window + screen already existed before */
+/* Do NOT call in area/region queues! */
+void ED_screen_set(bContext *C, bScreen *sc)
+{
+	
+	if(sc->full) {				/* find associated full */
+		bScreen *sc1;
+		for(sc1= G.main->screen.first; sc1; sc1= sc1->id.next) {
+			ScrArea *sa= sc1->areabase.first;
+			if(sa->full==sc) {
+				sc= sc1;
+				break;
+			}
+		}
+		if(sc1==NULL) printf("setscreen error\n");
+	}
+	
+	if (C->screen != sc) {
+		ED_screen_exit(C, C->window, C->screen);
+		C->window->screen= sc;
+		C->screen= sc;
+		
+		ED_screen_refresh(C->wm, C->window);
+		WM_event_add_notifier(C, WM_NOTE_WINDOW_REDRAW, 0, NULL);
+	}
+}
+

source/blender/editors/screen/screen_ops.c

@@ -857,6 +857,49 @@ void ED_SCR_OT_frame_offset(wmOperatorType *ot)
 	RNA_def_property(ot->srna, "delta", PROP_INT, PROP_NONE);
 }
 
+/* ************** switch screen operator ***************************** */
+
+
+/* function to be called outside UI context, or for redo */
+static int screen_set_exec(bContext *C, wmOperator *op)
+{
+	bScreen *screen= C->screen;
+	int delta= RNA_int_get(op->ptr, "delta");
+	
+	if(delta==1) {
+		screen= screen->id.next;
+		if(screen==NULL) screen= G.main->screen.first;
+	}
+	else if(delta== -1) {
+		screen= screen->id.prev;
+		if(screen==NULL) screen= G.main->screen.last;
+	}
+	else {
+		screen= NULL;
+	}
+	
+	if(screen) {
+		ED_screen_set(C, screen);
+		return OPERATOR_FINISHED;
+	}
+	return OPERATOR_CANCELLED;
+}
+
+void ED_SCR_OT_screen_set(wmOperatorType *ot)
+{
+	ot->name = "Set Screen";
+	ot->idname = "ED_SCR_OT_screen_set";
+	
+	ot->exec= screen_set_exec;
+	ot->poll= ED_operator_screenactive;
+	
+	/* rna */
+	RNA_def_property(ot->srna, "screen", PROP_POINTER, PROP_NONE);
+	RNA_def_property(ot->srna, "delta", PROP_INT, PROP_NONE);
+}
+
+
+
 /* ************** join area operator ********************************************** */
 
 /* operator state vars used:  
@@ -1312,7 +1355,8 @@ void ED_operatortypes_screen(void)
 	WM_operatortype_append(ED_SCR_OT_area_rip);
 	WM_operatortype_append(ED_SCR_OT_region_split);
 	WM_operatortype_append(ED_SCR_OT_region_flip);
-		
+	WM_operatortype_append(ED_SCR_OT_screen_set);
+	
 	/*frame changes*/
 	WM_operatortype_append(ED_SCR_OT_frame_offset);
 
@@ -1332,10 +1376,13 @@ void ED_keymap_screen(wmWindowManager *wm)
 	WM_keymap_verify_item(keymap, "ED_SCR_OT_area_split", EVT_ACTIONZONE, 0, 0, 0);	/* action tria */
 	WM_keymap_verify_item(keymap, "ED_SCR_OT_area_join", EVT_ACTIONZONE, 0, 0, 0);	/* action tria */ 
 	WM_keymap_verify_item(keymap, "ED_SCR_OT_area_rip", RKEY, KM_PRESS, KM_ALT, 0);
+	RNA_int_set(WM_keymap_add_item(keymap, "ED_SCR_OT_screen_set", RIGHTARROWKEY, KM_PRESS, KM_CTRL, 0)->ptr, "delta", 1);
+	RNA_int_set(WM_keymap_add_item(keymap, "ED_SCR_OT_screen_set", LEFTARROWKEY, KM_PRESS, KM_CTRL, 0)->ptr, "delta", -1);
 
 	 /* tests */
 	RNA_enum_set(WM_keymap_add_item(keymap, "ED_SCR_OT_region_split", SKEY, KM_PRESS, 0, 0)->ptr, "dir", 'h');
 	RNA_enum_set(WM_keymap_add_item(keymap, "ED_SCR_OT_region_split", SKEY, KM_PRESS, KM_SHIFT, 0)->ptr, "dir", 'v');
+						  
 	/*frame offsets*/
 	RNA_int_set(WM_keymap_add_item(keymap, "ED_SCR_OT_frame_offset", UPARROWKEY, KM_PRESS, 0, 0)->ptr, "delta", 10);
 	RNA_int_set(WM_keymap_add_item(keymap, "ED_SCR_OT_frame_offset", DOWNARROWKEY, KM_PRESS, 0, 0)->ptr, "delta", -10);

source/blender/windowmanager/intern/wm_init_exit.c

@@ -167,14 +167,9 @@ void WM_exit(bContext *C)
 	/* modal handlers are on window level freed, others too? */
 	if(C && C->wm) {
 		for(win= C->wm->windows.first; win; win= win->next) {
-			ARegion *ar;
 			
 			C->window= win;	/* needed by operator close callbacks */
 			WM_event_remove_handlers(C, &win->handlers);
-			
-			for(ar= win->screen->regionbase.first; ar; ar= ar->next)
-				WM_event_remove_handlers(C, &ar->handlers);
-			
 			ED_screen_exit(C, win, win->screen);
 		}
 	}