diff --git a/examples/gui/demo_view_benchmark.c b/examples/gui/demo_view_benchmark.c
index 9655d99875a3913012b96e3771405967e159d980..21ee4649cc6b0ccba00789a0e573a56499174863 100644
--- a/examples/gui/demo_view_benchmark.c
+++ b/examples/gui/demo_view_benchmark.c
@@ -12,6 +12,13 @@ static int running = 0;
 static rt_tick_t ticks;
 static long long area;
 
+static rt_bool_t _benchmark_onshow(struct rtgui_object *obj, struct rtgui_event *ev)
+{
+    rtgui_widget_focus(RTGUI_WIDGET(obj));
+
+    return RT_TRUE;
+}
+
 void _onidle(struct rtgui_object *object, rtgui_event_t *event)
 {
     rtgui_color_t color;
@@ -29,7 +36,7 @@ void _onidle(struct rtgui_object *object, rtgui_event_t *event)
     draw_rect.y1 = RAND(rect.y1, rect.y2);
     draw_rect.x2 = RAND(draw_rect.x1, rect.x2);
     draw_rect.y2 = RAND(draw_rect.y1, rect.y2);
-	area += rtgui_rect_width(draw_rect) * rtgui_rect_height(draw_rect);
+    area += rtgui_rect_width(draw_rect) * rtgui_rect_height(draw_rect);
     color = RTGUI_RGB(rand() % 255, rand() % 255, rand() % 255);
     RTGUI_WIDGET_BACKGROUND(container) = color;
 
@@ -37,14 +44,14 @@ void _onidle(struct rtgui_object *object, rtgui_event_t *event)
 
     /* »æͼÍê³É */
     rtgui_dc_end_drawing(dc);
-	if(rt_tick_get()-ticks >= RT_TICK_PER_SECOND)
-	{
-		char buf[16];
-		sprintf(buf, "%.2f", (double)area/(800*480));
-		rt_kprintf("frames per second: %s fps\n", buf);
-		area = 0;
-		ticks = rt_tick_get();
-	}
+    if(rt_tick_get()-ticks >= RT_TICK_PER_SECOND)
+    {
+        char buf[16];
+        sprintf(buf, "%.2f", (double)area/(800*480));
+        rt_kprintf("frames per second: %s fps\n", buf);
+        area = 0;
+        ticks = rt_tick_get();
+    }
 }
 
 void _draw_default(struct rtgui_object *object, rtgui_event_t *event)
@@ -104,13 +111,14 @@ rt_bool_t benchmark_event_handler(struct rtgui_object *object, rtgui_event_t *ev
             else
             {
                 /* run */
-				ticks = rt_tick_get();
-				area = 0;
+                ticks = rt_tick_get();
+                area = 0;
                 rtgui_app_set_onidle(_onidle);
             }
 
             running = !running;
         }
+
         return RT_TRUE;
     }
     else
@@ -122,12 +130,6 @@ rt_bool_t benchmark_event_handler(struct rtgui_object *object, rtgui_event_t *ev
     return RT_FALSE;
 }
 
-static rt_bool_t _benchmark_onshow(struct rtgui_object *obj, struct rtgui_event *ev)
-{
-    rtgui_widget_focus(RTGUI_WIDGET(obj));
-    return RT_TRUE;
-}
-
 rtgui_container_t *demo_view_benchmark(void)
 {
     srand(100);