diff --git a/components/gui/include/rtgui/event.h b/components/gui/include/rtgui/event.h
index 1113da10ad..78f269a239 100644
--- a/components/gui/include/rtgui/event.h
+++ b/components/gui/include/rtgui/event.h
@@ -329,7 +329,7 @@ enum rtgui_gesture_type
     RTGUI_GESTURE_PINCH     = 0x0002,
     RTGUI_GESTURE_DRAG      = 0x0004,
     RTGUI_GESTURE_LONGPRESS = 0x0008,
-	RTGUI_GESTURE_DRAGGED   = 0x0001 | 0x0004 | 0x0008,
+    RTGUI_GESTURE_DRAGGED   = 0x0001 | 0x0004 | 0x0008,
     /* PINCH, DRAG finished. */
     RTGUI_GESTURE_FINISH    = 0x8000,
     /* The corresponding gesture should be canceled. */
@@ -342,6 +342,8 @@ struct rtgui_event_gesture
     _RTGUI_EVENT_WIN_ELEMENTS
 
     enum rtgui_gesture_type type;
+
+    rt_uint32_t	win_acti_cnt;		/* win id */
 };
 
 /*
@@ -359,6 +361,8 @@ struct rtgui_event_mouse
     /* id of touch session(from down to up). Different session should have
      * different id. id should never be 0. */
     rt_uint32_t id;
+
+    rt_uint32_t	win_acti_cnt;		/* win id */
 };
 #define RTGUI_MOUSE_BUTTON_LEFT         0x01
 #define RTGUI_MOUSE_BUTTON_RIGHT        0x02
@@ -379,6 +383,8 @@ struct rtgui_event_kbd
 {
     _RTGUI_EVENT_WIN_ELEMENTS
 
+    rt_uint32_t	win_acti_cnt;		/* win id */
+
     rt_uint16_t type;       /* key down or up */
     rt_uint16_t key;        /* current key */
     rt_uint16_t mod;        /* current key modifiers */
diff --git a/components/gui/include/rtgui/rtgui_app.h b/components/gui/include/rtgui/rtgui_app.h
index 5cb2c83acc..8d17c9a21d 100644
--- a/components/gui/include/rtgui/rtgui_app.h
+++ b/components/gui/include/rtgui/rtgui_app.h
@@ -81,6 +81,8 @@ struct rtgui_app
     rtgui_idle_func_t on_idle;
 
     unsigned int window_cnt;
+    /* window activate count */
+    unsigned int win_acti_cnt;
 
     void *user_data;
 };
@@ -115,6 +117,9 @@ rt_err_t rtgui_app_set_as_wm(struct rtgui_app *app);
 void rtgui_app_set_main_win(struct rtgui_app *app, struct rtgui_win *win);
 struct rtgui_win* rtgui_app_get_main_win(struct rtgui_app *app);
 
+/* get the topwin belong app window activate count */
+unsigned int rtgui_app_get_win_acti_cnt(void);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/components/gui/include/rtgui/widgets/window.h b/components/gui/include/rtgui/widgets/window.h
index d9a0d2447b..1ef59a3d44 100644
--- a/components/gui/include/rtgui/widgets/window.h
+++ b/components/gui/include/rtgui/widgets/window.h
@@ -54,6 +54,8 @@ DECLARE_CLASS_TYPE(win);
 #define RTGUI_WIN_STYLE_ONBTM               0x0080  /* window is in the bottom layer */
 #define RTGUI_WIN_STYLE_MAINWIN             0x0106  /* window is a main window       */
 
+#define RTGUI_WIN_MAGIC						0xA5A55A5A		/* win magic flag */
+
 #define RTGUI_WIN_STYLE_DEFAULT     (RTGUI_WIN_STYLE_CLOSEBOX | RTGUI_WIN_STYLE_MINIBOX)
 
 #define WINTITLE_HEIGHT         20
@@ -88,8 +90,8 @@ struct rtgui_win
     /* inherit from container */
     rtgui_container_t parent;
 
-	/* update count */
-	rt_base_t update;
+    /* update count */
+    rt_base_t update;
 
     /* drawing count */
     rt_base_t drawing;
@@ -140,11 +142,12 @@ struct rtgui_win
 
     /* Private data. */
     rt_base_t (*_do_show)(struct rtgui_win *win);
-	
-	/* app ref_count */
-	rt_uint16_t app_ref_count;
-	/* win magic flag, magic value is 0xA5A55A5A */
-	rt_uint32_t	magic;
+
+    /* app ref_count */
+    rt_uint16_t app_ref_count;
+
+    /* win magic flag, magic value is 0xA5A55A5A */
+    rt_uint32_t	magic;
 };
 
 rtgui_win_t *rtgui_win_create(struct rtgui_win *parent_window, const char *title,
diff --git a/components/gui/src/dc.c b/components/gui/src/dc.c
index 004195a43f..849f05bb28 100644
--- a/components/gui/src/dc.c
+++ b/components/gui/src/dc.c
@@ -324,9 +324,9 @@ void rtgui_dc_draw_text(struct rtgui_dc *dc, const char *text, struct rtgui_rect
     }
 
     len = strlen((const char *)text);
-	if (len == 0)
-		return;
-	
+    if (len == 0)
+        return;
+
     rtgui_font_draw(font, dc, text, len, rect);
 }
 RTM_EXPORT(rtgui_dc_draw_text);
@@ -1689,6 +1689,13 @@ void rtgui_dc_get_rect(struct rtgui_dc *dc, rtgui_rect_t *rect)
         dc_hw = (struct rtgui_dc_hw *) dc;
         owner = dc_hw->owner;
         rtgui_widget_get_rect(owner, rect);
+
+        if (owner->extent.x1 + rect->x2 > dc_hw->hw_driver->width)
+            rect->x2 = dc_hw->hw_driver->width - owner->extent.x1;
+
+        if (owner->extent.y1 + rect->y2 > dc_hw->hw_driver->height)
+            rect->y2 = dc_hw->hw_driver->height - owner->extent.y1;
+
         break;
     }
     case RTGUI_DC_BUFFER:
@@ -1806,7 +1813,7 @@ extern void rtgui_mouse_hide_cursor(void);
 struct rtgui_dc *rtgui_dc_begin_drawing(rtgui_widget_t *owner)
 {
     struct rtgui_dc *dc;
-    struct rtgui_widget *widget;
+    struct rtgui_widget *widget, *parent;
     struct rtgui_win *win;
 
     RT_ASSERT(owner != RT_NULL);
@@ -1815,11 +1822,18 @@ struct rtgui_dc *rtgui_dc_begin_drawing(rtgui_widget_t *owner)
     if (win == RT_NULL)
         return RT_NULL;
 
+    parent = (struct rtgui_widget *)win;
+
     if (!(win->flag & RTGUI_WIN_FLAG_ACTIVATE) &&
             (win->outer_clip.extents.x1 == win->outer_clip.extents.x2 ||
              win->outer_clip.extents.y1 == win->outer_clip.extents.y2))
         return RT_NULL;
 
+    if (!(win->flag & RTGUI_WIN_FLAG_ACTIVATE) &&
+            (parent->clip.extents.x1 == parent->clip.extents.x2 ||
+             parent->clip.extents.y1 == parent->clip.extents.y2))
+        return RT_NULL;
+
     /* increase drawing count */
     if (win->drawing == 0)
     {
diff --git a/components/gui/src/dc_hw.c b/components/gui/src/dc_hw.c
index 2af8ae94cf..dfed6f8e9f 100644
--- a/components/gui/src/dc_hw.c
+++ b/components/gui/src/dc_hw.c
@@ -216,32 +216,22 @@ static void rtgui_dc_hw_fill_rect(struct rtgui_dc *self, struct rtgui_rect *rect
         return;
     if (x1 < dc->owner->extent.x1)
         x1 = dc->owner->extent.x1;
-	if (x1 < 0)
-		x1 = 0;
-
     x2 = rect->x2 + dc->owner->extent.x1;
     if (x2 < dc->owner->extent.x1)
         return;
     if (x2 > dc->owner->extent.x2)
         x2 = dc->owner->extent.x2;
-	if (x2 > dc->hw_driver->width)
-		x2 = dc->hw_driver->width;
 
     y1 = rect->y1 + dc->owner->extent.y1;
     if (y1 > dc->owner->extent.y2)
         return;
     if (y1 < dc->owner->extent.y1)
         y1 = dc->owner->extent.y1;
-	if (y1 < 0)
-		y1 = 0;
-
     y2 = rect->y2 + dc->owner->extent.y1;
     if (y2 < dc->owner->extent.y1)
         return;
     if (y2 > dc->owner->extent.y2)
         y2 = dc->owner->extent.y2;
-	if (y2 > dc->hw_driver->height)
-		y2 = dc->hw_driver->height;
 
     /* fill rect */
     for (; y1 < y2; y1++)
diff --git a/components/gui/src/font_bmp.c b/components/gui/src/font_bmp.c
index 1aba5c34b4..52e12c81a5 100644
--- a/components/gui/src/font_bmp.c
+++ b/components/gui/src/font_bmp.c
@@ -103,7 +103,7 @@ static void rtgui_bitmap_font_draw_text(struct rtgui_font *font, struct rtgui_dc
 
     RT_ASSERT(bmp_font != RT_NULL);
 
-    rtgui_font_get_metrics(rtgui_dc_get_gc(dc)->font, text, &text_rect);
+    rtgui_font_get_metrics(font, text, &text_rect);
     rtgui_rect_move_to_align(rect, &text_rect, RTGUI_DC_TEXTALIGN(dc));
 
     /* parameter check */
diff --git a/components/gui/src/font_freetype.c b/components/gui/src/font_freetype.c
index c4f5993791..0ec954945e 100644
--- a/components/gui/src/font_freetype.c
+++ b/components/gui/src/font_freetype.c
@@ -275,12 +275,12 @@ static void _rtgui_rect_move_to_align(const rtgui_rect_t *rect, rtgui_rect_t *to
         to->x1 += dw;
         to->x2 += dw;
     }
-	/* align to center horizontal */
-	else if (align & RTGUI_ALIGN_CENTER_HORIZONTAL)
-	{
-		to->x1 += dw >> 1;
-		to->x2 += dw >> 1;
-	}
+    /* align to center horizontal */
+    else if (align & RTGUI_ALIGN_CENTER_HORIZONTAL)
+    {
+        to->x1 += dw >> 1;
+        to->x2 += dw >> 1;
+    }
 
     /* align to bottom */
     if (align & RTGUI_ALIGN_BOTTOM)
@@ -393,7 +393,7 @@ static void _get_metrics(struct rtgui_ttf_font *ttf_font, const rt_uint16_t *tex
 static void _draw_bitmap(struct rtgui_dc *dc,
                          FTC_SBit bitmap,
                          rt_int16_t ox, rt_int16_t btm_y,
-                         rt_uint8_t a, rt_uint8_t r, rt_uint8_t g, rt_uint8_t b)
+                         rtgui_color_t fgc, rt_uint16_t right, rt_uint16_t bottom)
 {
     rt_int16_t x_start, y_start;
     struct rtgui_blit_info info = { 0 };
@@ -403,10 +403,12 @@ static void _draw_bitmap(struct rtgui_dc *dc,
     x_start = ox + bitmap->left;
     y_start = btm_y - bitmap->top;
 
-    info.a = a;
-    info.r = r;
-    info.g = g;
-    info.b = b;
+    PINFO(" draw bitmap (x, y) -> (%d, %d)\n", x_start, y_start);
+
+    info.a = RTGUI_RGB_A(fgc);
+    info.r = RTGUI_RGB_R(fgc);
+    info.g = RTGUI_RGB_G(fgc);
+    info.b = RTGUI_RGB_B(fgc);
 
     if (dc->type == RTGUI_DC_HW)
     {
@@ -444,18 +446,22 @@ static void _draw_bitmap(struct rtgui_dc *dc,
     }
     else if (dc->type == RTGUI_DC_BUFFER)
     {
+        int max_right, max_bottom;
+
         dest_buf = (struct rtgui_dc_buffer*)dc;
+        max_right = right > dest_buf->width ? dest_buf->width : right;
+        max_bottom = bottom > dest_buf->height ? dest_buf->height : bottom;
 
         if (x_start + bitmap->width < 0 || y_start + bitmap->height < 0
-                || x_start > dest_buf->width || y_start > dest_buf->height)
+                || x_start > max_right || y_start > max_bottom)
             return;
 
         /* blit source */
         info.src = (rt_uint8_t *)bitmap->buffer;
         info.src = info.src + (y_start > 0 ? 0 : -y_start) * bitmap->width + (x_start > 0 ? 0 : -x_start);
         info.src_fmt = RTGRAPHIC_PIXEL_FORMAT_ALPHA;
-        info.src_w = bitmap->width - (x_start > 0 ? 0 : -x_start) - (x_start + bitmap->width < dest_buf->width ? 0 : x_start + bitmap->width - dest_buf->width);
-        info.src_h = bitmap->height - (y_start > 0 ? 0 : -y_start) - (y_start + bitmap->height < dest_buf->height ? 0 : y_start + bitmap->height - dest_buf->height);
+        info.src_w = bitmap->width - (x_start > 0 ? 0 : -x_start) - (x_start + bitmap->width < max_right ? 0 : x_start + bitmap->width - max_right);
+        info.src_h = bitmap->height - (y_start > 0 ? 0 : -y_start) - (y_start + bitmap->height < max_bottom ? 0 : y_start + bitmap->height - max_bottom);
         info.src_pitch = bitmap->width;
         info.src_skip = info.src_pitch - info.src_w;
 
@@ -473,7 +479,13 @@ static void _draw_bitmap(struct rtgui_dc *dc,
     {
         struct rtgui_rect text_rect;
         struct rtgui_point dc_point = { 0, 0 };
-        struct rtgui_dc *text_dc = rtgui_dc_buffer_create_pixformat(RTGRAPHIC_PIXEL_FORMAT_ARGB888, bitmap->width, bitmap->height);
+        struct rtgui_dc *text_dc;
+
+        if (x_start + bitmap->width < 0 || y_start + bitmap->height < 0
+                || x_start > right || y_start > bottom)
+            return;
+
+        text_dc = rtgui_dc_buffer_create_pixformat(RTGRAPHIC_PIXEL_FORMAT_ARGB888, bitmap->width, bitmap->height);
         if (text_dc)
         {
             dest_buf = (struct rtgui_dc_buffer*)text_dc;
@@ -503,7 +515,7 @@ static void _draw_bitmap(struct rtgui_dc *dc,
             text_rect.y1 = y_start;
             text_rect.y2 = text_rect.y1 + bitmap->height;
 
-            rtgui_dc_buffer_set_alpha(text_dc, a);
+            rtgui_dc_buffer_set_alpha(text_dc, RTGUI_RGB_A(fgc));
             rtgui_dc_blit(text_dc, &dc_point, dc, &text_rect);
 
             rtgui_dc_destory(text_dc);
@@ -515,7 +527,7 @@ static void _draw_text(struct rtgui_dc *dc,
                        struct rtgui_ttf_font *ttf_font,
                        rt_uint16_t *text_short,
                        rt_int16_t begin_x, rt_int16_t btm_y,
-                       rt_uint8_t a, rt_uint8_t r, rt_uint8_t g, rt_uint8_t b)
+                       rtgui_color_t fgc, rt_uint16_t right, rt_uint16_t bottom)
 {
     int glyphIndex;
     FTC_SBit ftcSBit = RT_NULL;
@@ -531,7 +543,7 @@ static void _draw_text(struct rtgui_dc *dc,
             /* render font */
             begin_x -= (ftcSBit->left - (abs(ftcSBit->left) + 2) / 2);
 
-            _draw_bitmap(dc, ftcSBit, begin_x, btm_y, a, r, g, b);
+            _draw_bitmap(dc, ftcSBit, begin_x, btm_y, fgc, right, bottom);
 
             begin_x += ftcSBit->width + ftcSBit->left;
 
@@ -594,10 +606,6 @@ static void ftc_draw_text(struct rtgui_font *font,
 #endif
 
     fgc = RTGUI_DC_FC(dc);
-    a = RTGUI_RGB_A(fgc);
-    r = RTGUI_RGB_R(fgc);
-    g = RTGUI_RGB_G(fgc);
-    b = RTGUI_RGB_B(fgc);
 
     /* text align */
     _get_metrics(ttf_font, text_short, &text_rect);
@@ -633,7 +641,7 @@ static void ftc_draw_text(struct rtgui_font *font,
             goto _out;
     }
 
-    _draw_text(dc, ttf_font, text_short, begin_x, btm_y, a, r, g, b);
+    _draw_text(dc, ttf_font, text_short, begin_x, btm_y, fgc, rect->x2, rect->y2);
 
 _out:
     /* release unicode buffer */
@@ -698,9 +706,9 @@ static void ftc_get_metrics(struct rtgui_font *font, const char *text, struct rt
     RT_ASSERT(ttf_font != RT_NULL);
 
     len = strlen(text);
-	if (len == 0)
-		return;
-	
+    if (len == 0)
+        return;
+
     memset(rect, 0, sizeof(struct rtgui_rect));
 
     /* allocate unicode buffer */
@@ -717,7 +725,7 @@ static void ftc_get_metrics(struct rtgui_font *font, const char *text, struct rt
 #else
     rt_memset(text_short, 0x00, (utf8_to_unicode_len(text, len) + 1) * 2);
 #endif
-	
+
     /* convert gbk to unicode */
 #ifndef UTF8_TO_UNICODE
     gbk_to_unicode(text_short, text, len);
@@ -775,7 +783,7 @@ static struct rtgui_ttf *rtgui_ttf_load(const char *filename)
             return RT_NULL;
         }
     }
-	
+
     /* face_id init */
     ttf->face_id.pathname = rt_strdup(filename);
     ttf->face_id.face_index = 0;
@@ -847,11 +855,11 @@ rtgui_font_t *rtgui_freetype_font_create(const char *filename, rt_size_t size)
         font = rtgui_font_refer(filename, size);
         if (font)
         {
-			if (font->height == size)
-				return font;
-			else
-				rtgui_font_derefer(font);
-        }		
+            if (font->height == size)
+                return font;
+            else
+                rtgui_font_derefer(font);
+        }
     }
 
     font = (struct rtgui_font *)rtgui_malloc(sizeof(struct rtgui_font) + sizeof(struct rtgui_ttf_font));
diff --git a/components/gui/src/rtgui_app.c b/components/gui/src/rtgui_app.c
index 9878ff4ea7..c7210c12c4 100644
--- a/components/gui/src/rtgui_app.c
+++ b/components/gui/src/rtgui_app.c
@@ -29,7 +29,7 @@
 #include <rtgui/rtgui_system.h>
 #include <rtgui/rtgui_app.h>
 #include <rtgui/widgets/window.h>
-#include "topwin.h"
+#include <topwin.h>
 
 static void _rtgui_app_constructor(struct rtgui_app *app)
 {
@@ -43,6 +43,7 @@ static void _rtgui_app_constructor(struct rtgui_app *app)
     app->state_flag     = RTGUI_APP_FLAG_EXITED;
     app->ref_count      = 0;
     app->window_cnt     = 0;
+    app->win_acti_cnt   = 0;
     app->exit_code      = 0;
     app->tid            = RT_NULL;
     app->mq             = RT_NULL;
@@ -203,11 +204,11 @@ rt_inline rt_bool_t _rtgui_application_dest_handle(
 
     if (wevent->wid == RT_NULL)
         return RT_FALSE;
-	
-	if (wevent->wid->magic != 0xA5A55A5A)
-	{
-		return RT_FALSE;
-	}
+
+    if (wevent->wid->magic != RTGUI_WIN_MAGIC)
+    {
+        return RT_FALSE;
+    }
 
     /* this window has been closed. */
     if (wevent->wid != RT_NULL && wevent->wid->flag & RTGUI_WIN_FLAG_CLOSED)
@@ -249,19 +250,55 @@ rt_bool_t rtgui_app_event_handler(struct rtgui_object *object, rtgui_event_t *ev
 
     switch (event->type)
     {
-    case RTGUI_EVENT_PAINT:
-    case RTGUI_EVENT_VPAINT_REQ:
+    case RTGUI_EVENT_KBD:
+    {
+        struct rtgui_event_kbd *kbd = (struct rtgui_event_kbd*)event;
+
+        if (kbd->win_acti_cnt != app->win_acti_cnt)
+            break;
+
+        _rtgui_application_dest_handle(app, event);
+    }
+    break;
+
     case RTGUI_EVENT_MOUSE_BUTTON:
     case RTGUI_EVENT_MOUSE_MOTION:
-    case RTGUI_EVENT_CLIP_INFO:
+    {
+        struct rtgui_event_mouse *wevent = (struct rtgui_event_mouse *)event;
+
+        if (wevent->win_acti_cnt != app->win_acti_cnt)
+            break;
+
+        _rtgui_application_dest_handle(app, event);
+    }
+    break;
+
+    case RTGUI_EVENT_GESTURE:
+    {
+        struct rtgui_event_gesture *wevent = (struct rtgui_event_gesture *)event;
+
+        if (wevent->win_acti_cnt != app->win_acti_cnt)
+            break;
+
+        _rtgui_application_dest_handle(app, event);
+    }
+    break;
+
     case RTGUI_EVENT_WIN_ACTIVATE:
+    {
+        app->win_acti_cnt++;
+        _rtgui_application_dest_handle(app, event);
+    }
+    break;
+
+    case RTGUI_EVENT_PAINT:
+    case RTGUI_EVENT_VPAINT_REQ:
+    case RTGUI_EVENT_CLIP_INFO:
     case RTGUI_EVENT_WIN_DEACTIVATE:
     case RTGUI_EVENT_WIN_CLOSE:
     case RTGUI_EVENT_WIN_MOVE:
     case RTGUI_EVENT_WIN_SHOW:
     case RTGUI_EVENT_WIN_HIDE:
-    case RTGUI_EVENT_KBD:
-    case RTGUI_EVENT_GESTURE:
         _rtgui_application_dest_handle(app, event);
         break;
 
@@ -284,14 +321,14 @@ rt_bool_t rtgui_app_event_handler(struct rtgui_object *object, rtgui_event_t *ev
 
     case RTGUI_EVENT_TIMER:
     {
-		rt_base_t level;
+        rt_base_t level;
         struct rtgui_timer *timer;
         struct rtgui_event_timer *etimer = (struct rtgui_event_timer *) event;
 
         timer = etimer->timer;
-		level = rt_hw_interrupt_disable();
+        level = rt_hw_interrupt_disable();
         timer->pending_cnt--;
-		rt_hw_interrupt_enable(level);
+        rt_hw_interrupt_enable(level);
         RT_ASSERT(timer->pending_cnt >= 0);
         if (timer->state == RTGUI_TIMER_ST_DESTROY_PENDING)
         {
@@ -320,21 +357,21 @@ rt_bool_t rtgui_app_event_handler(struct rtgui_object *object, rtgui_event_t *ev
 
         if (ecmd->wid != RT_NULL)
             return _rtgui_application_dest_handle(app, event);
-		else
-		{
-			struct rtgui_topwin *wnd;
+        else
+        {
+            struct rtgui_topwin *wnd;
 
-			wnd = rtgui_topwin_get_focus();
-			if (wnd != RT_NULL)
-			{
-				RT_ASSERT(wnd->flag & WINTITLE_ACTIVATE)
+            wnd = rtgui_topwin_get_focus();
+            if (wnd != RT_NULL)
+            {
+                RT_ASSERT(wnd->flag & WINTITLE_ACTIVATE)
 
-				/* send to focus window */
-				ecmd->wid = wnd->wid;
+                /* send to focus window */
+                ecmd->wid = wnd->wid;
 
-				return _rtgui_application_dest_handle(app, event);
-			}			
-		}
+                return _rtgui_application_dest_handle(app, event);
+            }
+        }
     }
     default:
         return rtgui_object_event_handler(object, event);
@@ -507,3 +544,16 @@ struct rtgui_win *rtgui_app_get_main_win(struct rtgui_app *app)
 }
 RTM_EXPORT(rtgui_app_get_main_win);
 
+unsigned int rtgui_app_get_win_acti_cnt(void)
+{
+    struct rtgui_app *app = rtgui_topwin_app_get_focus();
+
+    if (app)
+    {
+        return app->win_acti_cnt;
+    }
+
+    return 0;
+}
+RTM_EXPORT(rtgui_app_get_win_acti_cnt);
+
diff --git a/components/gui/src/topwin.c b/components/gui/src/topwin.c
index fe379be60b..91719e0c99 100644
--- a/components/gui/src/topwin.c
+++ b/components/gui/src/topwin.c
@@ -764,7 +764,7 @@ rt_err_t rtgui_topwin_move(struct rtgui_event_win_move *event)
 
     old_rect = topwin->extent;
     /* move window rect */
-	rtgui_rect_move(&(topwin->extent), dx, dy);
+    rtgui_rect_move(&(topwin->extent), dx, dy);
 
     /* move the monitor rect list */
     rtgui_list_foreach(node, &(topwin->monitor_list))
@@ -772,7 +772,7 @@ rt_err_t rtgui_topwin_move(struct rtgui_event_win_move *event)
         struct rtgui_mouse_monitor *monitor = rtgui_list_entry(node,
                                               struct rtgui_mouse_monitor,
                                               list);
-		rtgui_rect_move(&(monitor->rect), dx, dy);
+        rtgui_rect_move(&(monitor->rect), dx, dy);
     }
 
     /* update windows clip info */
@@ -853,6 +853,19 @@ struct rtgui_topwin *rtgui_topwin_get_focus(void)
     return _rtgui_topwin_get_focus_from_list(&_rtgui_topwin_list);
 }
 
+struct rtgui_app *rtgui_topwin_app_get_focus(void)
+{
+    struct rtgui_app *topwin_app = RT_NULL;
+    struct rtgui_topwin *topwin = rtgui_topwin_get_focus();
+
+    if (topwin)
+    {
+        topwin_app = topwin->app;
+    }
+
+    return topwin_app;
+}
+
 static struct rtgui_topwin *_rtgui_topwin_get_wnd_from_tree(struct rt_list_node *list,
         int x, int y,
         rt_bool_t exclude_modaled)
@@ -978,7 +991,8 @@ static void _rtgui_topwin_redraw_tree(struct rt_list_node *list,
         if (rtgui_rect_is_intersect(rect, &(topwin->extent)) == RT_EOK)
         {
             epaint->wid = topwin->wid;
-            rtgui_send(topwin->app, &(epaint->parent), sizeof(*epaint));
+            // < XY do !!! >
+            //rtgui_send(topwin->app, &(epaint->parent), sizeof(*epaint));
         }
 
         _rtgui_topwin_redraw_tree(&topwin->child_list, rect, epaint);
@@ -1026,7 +1040,8 @@ rt_err_t rtgui_topwin_modal_enter(struct rtgui_event_win_modal_enter *event)
         parent_top->flag |= WINTITLE_MODALED;
         parent_top->wid->flag |= RTGUI_WIN_FLAG_UNDER_MODAL;
         parent_top = parent_top->parent;
-    } while (parent_top);
+    }
+    while (parent_top);
 
     topwin->flag &= ~WINTITLE_MODALED;
     topwin->wid->flag &= ~RTGUI_WIN_FLAG_UNDER_MODAL;
diff --git a/components/gui/src/topwin.h b/components/gui/src/topwin.h
index 35376f889b..1aa3a73141 100644
--- a/components/gui/src/topwin.h
+++ b/components/gui/src/topwin.h
@@ -64,6 +64,9 @@ void rtgui_topwin_remove_monitor_rect(struct rtgui_win *wid, rtgui_rect_t *rect)
 /* get the topwin that is currently focused */
 struct rtgui_topwin *rtgui_topwin_get_focus(void);
 
+/* get the topwin which app I belong */
+struct rtgui_app *rtgui_topwin_app_get_focus(void);
+
 struct rtgui_topwin *rtgui_topwin_get_topmost_window_shown_all(void);
 
 #endif
diff --git a/components/gui/src/window.c b/components/gui/src/window.c
index 2fe8ae8777..894203e337 100644
--- a/components/gui/src/window.c
+++ b/components/gui/src/window.c
@@ -41,7 +41,7 @@ static void _rtgui_win_constructor(rtgui_win_t *win)
     RTGUI_WIDGET(win)->toplevel = win;
 
     /* init win property */
-	win->update = 0;
+    win->update = 0;
     win->drawing = 0;
 
     RTGUI_WIDGET(win)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE;
@@ -440,7 +440,7 @@ rt_base_t rtgui_win_show(struct rtgui_win *win, rt_bool_t is_modal)
 {
     RTGUI_WIDGET_UNHIDE(win);
 
-    win->magic = 0xA5A55A5A;
+    win->magic = RTGUI_WIN_MAGIC;
 
     if (is_modal)
         win->flag |= RTGUI_WIN_FLAG_MODAL;
@@ -548,7 +548,7 @@ void rtgui_win_move(struct rtgui_win *win, int x, int y)
         dy = y - wgt->extent.y1;
         rtgui_widget_move_to_logic(wgt, dx, dy);
     }
-	rtgui_rect_move(&win->outer_extent, dx, dy);
+    rtgui_rect_move(&win->outer_extent, dx, dy);
 
     if (win->flag & RTGUI_WIN_FLAG_CONNECTED)
     {