path: root/components/gui/src/mouse.c

/*
 * File      : mouse.c
 * This file is part of RT-Thread GUI Engine
 * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-10-16     Bernard      first version
 */

#include "mouse.h"
#include <rtgui/region.h>
#include <rtgui/driver.h>
#include <rtgui/rtgui_system.h>

struct rtgui_cursor
{
    /* screen byte per pixel */
    rt_uint16_t bpp;

    /* screen pitch */
    rt_uint16_t screen_pitch;

    /* current cursor x and y */
    rt_uint16_t cx, cy;

#ifdef RTGUI_USING_MOUSE_CURSOR
    /* cursor pitch */
    rt_uint16_t cursor_pitch;

    /* show cursor and show cursor count */
    rt_bool_t show_cursor;
    rt_base_t show_cursor_count;

    /* cursor rect info */
    rtgui_rect_t rect;

    /* cursor image and saved cursor */
    rtgui_image_t   *cursor_image;
    rt_uint8_t      *cursor_saved;
#endif

#ifdef RTGUI_USING_WINMOVE
    /* move window rect and border */
    struct rtgui_win *win;
    rtgui_rect_t    win_rect;
    rt_uint8_t      *win_left, *win_right;
    rt_uint8_t      *win_top, *win_bottom;
    rt_bool_t       win_rect_show, win_rect_has_saved;
#endif
};

struct rtgui_cursor *_rtgui_cursor;

#ifdef RTGUI_USING_MOUSE_CURSOR
struct rt_mutex cursor_mutex;
static const rt_uint8_t *cursor_xpm[] =
{
    "16 16 35 1",
    " 	c None",
    ".	c #A0B8D0",
    "+	c #F0F0F0",
    "@	c #FFFFFF",
    "#	c #F0F8F0",
    "$	c #A0B0D0",
    "%	c #90A8C0",
    "&	c #A0B0C0",
    "*	c #E0E8F0",
    "=	c #8090B0",
    "-	c #D0D8E0",
    ";	c #7080A0",
    ">	c #90A0B0",
    ",	c #FFF8FF",
    "'	c #F0F8FF",
    ")	c #607090",
    "!	c #8098B0",
    "~	c #405060",
    "{	c #405070",
    "]	c #506070",
    "^	c #607080",
    "/	c #708090",
    "(	c #7088A0",
    "_	c #D0D0E0",
    ":	c #607890",
    "<	c #C0D0E0",
    "[	c #C0C8D0",
    "}	c #506880",
    "|	c #5F778F",
    "1	c #D0D8F0",
    "2	c #506080",
    "3	c #C0C8E0",
    "4	c #A0A8C0",
    "5	c #405870",
    "6	c #5F6F8F",
    "   .            ",
    "   ..           ",
    "   .+.          ",
    "   .@#$         ",
    "   $@@+%        ",
    "   &@@@*=       ",
    "   %@@@@-;      ",
    "   >@@,''-)     ",
    "   !,''+)~{]    ",
    "   ='-^*/       ",
    "   (_{:<[^      ",
    "   ;} |:12      ",
    "   /   )345     ",
    "       6}${     ",
    "        5{      ",
    "                "
};

static void rtgui_cursor_restore(void);
static void rtgui_cursor_save(void);
static void rtgui_cursor_show(void);
#endif

#ifdef RTGUI_USING_WINMOVE
static void rtgui_winrect_restore(void);
static void rtgui_winrect_save(void);
static void rtgui_winrect_show(void);
#endif

#define WIN_MOVE_BORDER 4
void rtgui_mouse_init(void)
{
    const struct rtgui_graphic_driver *gd = rtgui_graphic_driver_get_default();

    if (_rtgui_cursor != RT_NULL) rtgui_mouse_fini();

    _rtgui_cursor = (struct rtgui_cursor *) rtgui_malloc(sizeof(struct rtgui_cursor));
    rt_memset(_rtgui_cursor, 0, sizeof(struct rtgui_cursor));

#ifdef RTGUI_USING_MOUSE_CURSOR
    rt_mutex_init(&cursor_mutex, "cursor", RT_IPC_FLAG_FIFO);
#endif

    /* init cursor */
    _rtgui_cursor->bpp = _UI_BITBYTES(gd->bits_per_pixel);
    _rtgui_cursor->screen_pitch = _rtgui_cursor->bpp * gd->width;

#ifdef RTGUI_USING_MOUSE_CURSOR
    /* init cursor image */
    _rtgui_cursor->cursor_image = rtgui_image_create_from_mem("xpm",
                                  (rt_uint8_t *)cursor_xpm,
                                  sizeof(cursor_xpm),
                                  RT_TRUE);
    if (_rtgui_cursor->cursor_image == RT_NULL)
    {
        rtgui_free(_rtgui_cursor);
        _rtgui_cursor = RT_NULL;

        return;
    }

    /* init rect */
    _rtgui_cursor->rect.x1 = _rtgui_cursor->rect.y1 = 0;
    _rtgui_cursor->rect.x2 = _rtgui_cursor->cursor_image->w;
    _rtgui_cursor->rect.y2 = _rtgui_cursor->cursor_image->h;

    _rtgui_cursor->cursor_pitch = _rtgui_cursor->cursor_image->w * _rtgui_cursor->bpp;

    _rtgui_cursor->show_cursor = RT_TRUE;
    _rtgui_cursor->show_cursor_count = 0;
    _rtgui_cursor->cursor_saved = rtgui_malloc(_rtgui_cursor->cursor_image->w *
                                  _rtgui_cursor->cursor_image->h * _rtgui_cursor->bpp);
#endif

#ifdef RTGUI_USING_WINMOVE
    /* init window move save image */
    _rtgui_cursor->win_rect_has_saved   = RT_FALSE;
    _rtgui_cursor->win_rect_show        = RT_FALSE;

    _rtgui_cursor->win_left     = rtgui_malloc(_rtgui_cursor->bpp * gd->height * WIN_MOVE_BORDER);
    _rtgui_cursor->win_right    = rtgui_malloc(_rtgui_cursor->bpp * gd->height * WIN_MOVE_BORDER);
    _rtgui_cursor->win_top      = rtgui_malloc(_rtgui_cursor->bpp * gd->width  * WIN_MOVE_BORDER);
    _rtgui_cursor->win_bottom   = rtgui_malloc(_rtgui_cursor->bpp * gd->width  * WIN_MOVE_BORDER);
#endif
}

void rtgui_mouse_fini(void)
{
    if (_rtgui_cursor != RT_NULL)
    {
#ifdef RTGUI_USING_WINMOVE
        rtgui_free(_rtgui_cursor->win_left);
        rtgui_free(_rtgui_cursor->win_right);
        rtgui_free(_rtgui_cursor->win_top);
        rtgui_free(_rtgui_cursor->win_bottom);
#endif
#ifdef RTGUI_USING_MOUSE_CURSOR
        rt_mutex_detach(&cursor_mutex);
        rtgui_image_destroy(_rtgui_cursor->cursor_image);
        rtgui_free(_rtgui_cursor->cursor_saved);
#endif
        rtgui_free(_rtgui_cursor);

        _rtgui_cursor = RT_NULL;
    }
}

void rtgui_mouse_moveto(int x, int y)
{
#ifdef RTGUI_USING_MOUSE_CURSOR
    rt_mutex_take(&cursor_mutex, RT_WAITING_FOREVER);
#endif

    if (x != _rtgui_cursor->cx ||
            y != _rtgui_cursor->cy)
    {
#ifdef RTGUI_USING_WINMOVE
        if (_rtgui_cursor->win_rect_show)
        {
            if (_rtgui_cursor->win_rect_has_saved == RT_TRUE)
            {
                rtgui_winrect_restore();
            }

#ifdef RTGUI_USING_MOUSE_CURSOR
            rtgui_mouse_hide_cursor();
#endif

            /* move winrect */
            rtgui_rect_move(&(_rtgui_cursor->win_rect), x - _rtgui_cursor->cx,
                              y - _rtgui_cursor->cy);
            rtgui_winrect_save();

            /* move current cursor */
            _rtgui_cursor->cx = x;
            _rtgui_cursor->cy = y;

#ifdef RTGUI_USING_MOUSE_CURSOR
            /* show cursor */
            rtgui_mouse_show_cursor();
#endif
            /* show winrect */
            rtgui_winrect_show();
        }
        else
#endif
        {
#ifdef RTGUI_USING_MOUSE_CURSOR
            rtgui_mouse_hide_cursor();
#endif
            /* move current cursor */
            _rtgui_cursor->cx = x;
            _rtgui_cursor->cy = y;

#ifdef RTGUI_USING_MOUSE_CURSOR
            /* show cursor */
            rtgui_mouse_show_cursor();
#endif
        }

#ifdef RTGUI_USING_HW_CURSOR
        rtgui_cursor_set_position(_rtgui_cursor->cx, _rtgui_cursor->cy);
#endif
    }

#ifdef RTGUI_USING_MOUSE_CURSOR
    rt_mutex_release(&cursor_mutex);
#endif
}

void rtgui_mouse_set_position(int x, int y)
{
    /* move current cursor */
    _rtgui_cursor->cx = x;
    _rtgui_cursor->cy = y;

#ifdef RTGUI_USING_HW_CURSOR
    rtgui_cursor_set_position(_rtgui_cursor->cx, _rtgui_cursor->cy);
#endif
}

#ifdef RTGUI_USING_MOUSE_CURSOR
void rtgui_mouse_set_cursor_enable(rt_bool_t enable)
{
    _rtgui_cursor->show_cursor = enable;
}

/* set current cursor image */
void rtgui_mouse_set_cursor(rtgui_image_t *cursor)
{
}

void rtgui_mouse_get_cursor_rect(rtgui_rect_t *rect)
{
    if (rect != RT_NULL)
    {
        *rect = _rtgui_cursor->rect;
    }
}

void rtgui_mouse_show_cursor()
{
    if (_rtgui_cursor->show_cursor == RT_FALSE)
        return;

    _rtgui_cursor->show_cursor_count ++;
    if (_rtgui_cursor->show_cursor_count == 1)
    {
        /* save show mouse area */
        rtgui_cursor_save();

        /* show mouse cursor */
        rtgui_cursor_show();
    }
}

void rtgui_mouse_hide_cursor()
{
    if (_rtgui_cursor->show_cursor == RT_FALSE)
        return;

    if (_rtgui_cursor->show_cursor_count == 1)
    {
        /* display the cursor coverage area */
        rtgui_cursor_restore();
    }
    _rtgui_cursor->show_cursor_count --;
}

rt_bool_t rtgui_mouse_is_intersect(rtgui_rect_t *r)
{
    return rtgui_rect_is_intersect(&(_rtgui_cursor->rect), r) == RT_EOK ? RT_TRUE : RT_FALSE;
}

/* display the saved cursor area to screen */
static void rtgui_cursor_restore()
{
    rt_base_t idx, height, cursor_pitch;
    rt_uint8_t *cursor_ptr, *fb_ptr;

    fb_ptr = rtgui_graphic_driver_get_framebuffer(RT_NULL) + _rtgui_cursor->cy * _rtgui_cursor->screen_pitch
             + _rtgui_cursor->cx * _rtgui_cursor->bpp;
    cursor_ptr = _rtgui_cursor->cursor_saved;

    height = (_rtgui_cursor->cy + _rtgui_cursor->cursor_image->h <
              rtgui_graphic_driver_get_default()->height) ? _rtgui_cursor->cursor_image->h :
             rtgui_graphic_driver_get_default()->height - _rtgui_cursor->cy;

    cursor_pitch = (_rtgui_cursor->cx + _rtgui_cursor->cursor_image->w <
                    rtgui_graphic_driver_get_default()->width) ? _rtgui_cursor->cursor_pitch :
                   (rtgui_graphic_driver_get_default()->width - _rtgui_cursor->cx) * _rtgui_cursor->bpp;

    for (idx = 0; idx < height; idx ++)
    {
        memcpy(fb_ptr, cursor_ptr, cursor_pitch);

        fb_ptr += _rtgui_cursor->screen_pitch;
        cursor_ptr += _rtgui_cursor->cursor_pitch;
    }
}

/* save the cursor coverage area from screen */
static void rtgui_cursor_save()
{
    rt_base_t idx, height, cursor_pitch;
    rt_uint8_t *cursor_ptr, *fb_ptr;

    fb_ptr = rtgui_graphic_driver_get_framebuffer(RT_NULL) + _rtgui_cursor->cy * _rtgui_cursor->screen_pitch +
             _rtgui_cursor->cx * _rtgui_cursor->bpp;
    cursor_ptr = _rtgui_cursor->cursor_saved;

    height = (_rtgui_cursor->cy + _rtgui_cursor->cursor_image->h <
              rtgui_graphic_driver_get_default()->height) ? _rtgui_cursor->cursor_image->h :
             rtgui_graphic_driver_get_default()->height - _rtgui_cursor->cy;

    cursor_pitch = (_rtgui_cursor->cx + _rtgui_cursor->cursor_image->w <
                    rtgui_graphic_driver_get_default()->width) ? _rtgui_cursor->cursor_pitch :
                   (rtgui_graphic_driver_get_default()->width - _rtgui_cursor->cx) * _rtgui_cursor->bpp;

    for (idx = 0; idx < height; idx ++)
    {
        memcpy(cursor_ptr, fb_ptr, cursor_pitch);

        fb_ptr += _rtgui_cursor->screen_pitch;
        cursor_ptr += _rtgui_cursor->cursor_pitch;
    }
}

static void rtgui_cursor_show()
{
    // FIXME: the prototype of set_pixel is using int so we have to use int
    // as well. Might be uniformed with others in the future
    int x, y;
    rtgui_color_t *ptr;
    rtgui_rect_t rect;
    void (*set_pixel)(rtgui_color_t * c, int x, int y);

    ptr = (rtgui_color_t *) _rtgui_cursor->cursor_image->data;
    set_pixel = rtgui_graphic_driver_get_default()->ops->set_pixel;

    rtgui_mouse_get_cursor_rect(&rect);
    rtgui_rect_move(&rect, _rtgui_cursor->cx, _rtgui_cursor->cy);

    /* draw each point */
    for (y = rect.y1; y < rect.y2; y ++)
    {
        for (x = rect.x1; x < rect.x2; x++)
        {
            /* not alpha */
            if ((*ptr >> 24) != 255)
            {
                set_pixel(ptr, x, y);
            }

            /* move to next color buffer */
            ptr ++;
        }
    }

    /* update rect */
    rtgui_graphic_driver_screen_update(rtgui_graphic_driver_get_default(), &rect);
}
#endif

#ifdef RTGUI_USING_WINMOVE
void rtgui_winrect_set(struct rtgui_win *win)
{
    /* set win rect show */
    _rtgui_cursor->win_rect_show = RT_TRUE;

    /* set win rect */
    _rtgui_cursor->win_rect =
        win->_title_wgt == RT_NULL ?
        RTGUI_WIDGET(win)->extent :
        RTGUI_WIDGET(win->_title_wgt)->extent;

    _rtgui_cursor->win = win;
}

rt_bool_t rtgui_winrect_moved_done(rtgui_rect_t *winrect, struct rtgui_win **win)
{
    rt_bool_t moved = RT_FALSE;

    /* restore winrect */
    if (_rtgui_cursor->win_rect_has_saved)
    {
        rtgui_winrect_restore();

        moved = RT_TRUE;
    }

    /* clear win rect show */
    _rtgui_cursor->win_rect_show = RT_FALSE;
    _rtgui_cursor->win_rect_has_saved = RT_FALSE;

    /* return win rect */
    if (winrect)
        *winrect = _rtgui_cursor->win_rect;
    if (win)
        *win = _rtgui_cursor->win;

    return moved;
}

rt_bool_t rtgui_winrect_is_moved()
{
    return _rtgui_cursor->win_rect_show;
}

/* show winrect */
static void rtgui_winrect_show()
{
    rt_uint16_t x, y;
    rtgui_color_t c;
    rtgui_rect_t screen_rect, win_rect, win_rect_inner;
    void (*set_pixel)(rtgui_color_t * c, int x, int y);

    c = black;
    set_pixel = rtgui_graphic_driver_get_default()->ops->set_pixel;

    win_rect = _rtgui_cursor->win_rect;
    win_rect_inner = win_rect;
    rtgui_rect_inflate(&win_rect_inner, -WIN_MOVE_BORDER);

    rtgui_graphic_driver_get_rect(rtgui_graphic_driver_get_default(),
                                  &screen_rect);
    rtgui_rect_intersect(&screen_rect, &win_rect);
    rtgui_rect_intersect(&screen_rect, &win_rect_inner);

    /* draw left */
    for (y = win_rect.y1; y < win_rect.y2; y ++)
    {
        for (x = win_rect.x1; x < win_rect_inner.x1; x++)
            if ((x + y) & 0x01) set_pixel(&c, x, y);
    }

    /* draw right */
    for (y = win_rect.y1; y < win_rect.y2; y ++)
    {
        for (x = win_rect_inner.x2; x < win_rect.x2; x++)
            if ((x + y) & 0x01) set_pixel(&c, x, y);
    }

    /* draw top border */
    for (y = win_rect.y1; y < win_rect_inner.y1; y ++)
    {
        for (x = win_rect_inner.x1; x < win_rect_inner.x2; x++)
            if ((x + y) & 0x01) set_pixel(&c, x, y);
    }

    /* draw bottom border */
    for (y = win_rect_inner.y2; y < win_rect.y2; y ++)
    {
        for (x = win_rect_inner.x1; x < win_rect_inner.x2; x++)
            if ((x + y) & 0x01) set_pixel(&c, x, y);
    }

    /* update rect */
    rtgui_graphic_driver_screen_update(rtgui_graphic_driver_get_default(), &win_rect);
}

#define display_direct_memcpy(src, dest, src_pitch, dest_pitch, height, len)    \
    for (idx = 0; idx < height; idx ++)     \
    {                                       \
        memcpy(dest, src, len);             \
        src  += src_pitch;                  \
        dest += dest_pitch;                 \
    }

static void rtgui_winrect_restore()
{
    rt_uint8_t *winrect_ptr, *fb_ptr, *driver_fb;
    int winrect_pitch, idx;
    rtgui_rect_t screen_rect, win_rect;

    driver_fb = rtgui_graphic_driver_get_framebuffer(RT_NULL);
    win_rect = _rtgui_cursor->win_rect;

    rtgui_graphic_driver_get_rect(rtgui_graphic_driver_get_default(),
                                  &screen_rect);
    rtgui_rect_intersect(&screen_rect, &win_rect);

    /* restore winrect left */
    fb_ptr = driver_fb + win_rect.y1 * _rtgui_cursor->screen_pitch +
             win_rect.x1 * _rtgui_cursor->bpp;
    winrect_ptr = _rtgui_cursor->win_left;
    winrect_pitch = WIN_MOVE_BORDER * _rtgui_cursor->bpp;
    display_direct_memcpy(winrect_ptr, fb_ptr, winrect_pitch, _rtgui_cursor->screen_pitch,
                          (win_rect.y2 - win_rect.y1), winrect_pitch);

    /* restore winrect right */
    fb_ptr = driver_fb + win_rect.y1 * _rtgui_cursor->screen_pitch +
             (win_rect.x2 - WIN_MOVE_BORDER) * _rtgui_cursor->bpp;
    winrect_ptr = _rtgui_cursor->win_right;
    winrect_pitch = WIN_MOVE_BORDER * _rtgui_cursor->bpp;
    display_direct_memcpy(winrect_ptr, fb_ptr, winrect_pitch, _rtgui_cursor->screen_pitch,
                          (win_rect.y2 - win_rect.y1), winrect_pitch);

    /* restore winrect top */
    fb_ptr = driver_fb + win_rect.y1 * _rtgui_cursor->screen_pitch +
             (win_rect.x1 + WIN_MOVE_BORDER) * _rtgui_cursor->bpp;
    winrect_ptr = _rtgui_cursor->win_top;
    winrect_pitch = (win_rect.x2 - win_rect.x1 - 2 * WIN_MOVE_BORDER) * _rtgui_cursor->bpp;
    display_direct_memcpy(winrect_ptr, fb_ptr, winrect_pitch, _rtgui_cursor->screen_pitch,
                          WIN_MOVE_BORDER, winrect_pitch);

    /* restore winrect bottom */
    fb_ptr = driver_fb + (win_rect.y2 - WIN_MOVE_BORDER) * _rtgui_cursor->screen_pitch +
             (win_rect.x1 + WIN_MOVE_BORDER) * _rtgui_cursor->bpp;
    winrect_ptr = _rtgui_cursor->win_bottom;
    display_direct_memcpy(winrect_ptr, fb_ptr, winrect_pitch, _rtgui_cursor->screen_pitch,
                          WIN_MOVE_BORDER, winrect_pitch);
}

static void rtgui_winrect_save()
{
    rt_uint8_t *winrect_ptr, *fb_ptr, *driver_fb;
    int winrect_pitch, idx;
    rtgui_rect_t screen_rect, win_rect;

    driver_fb = rtgui_graphic_driver_get_framebuffer(RT_NULL);
    win_rect = _rtgui_cursor->win_rect;

    rtgui_graphic_driver_get_rect(rtgui_graphic_driver_get_default(),
                                  &screen_rect);
    rtgui_rect_intersect(&screen_rect, &win_rect);

    /* set winrect has saved */
    _rtgui_cursor->win_rect_has_saved = RT_TRUE;

    /* save winrect left */
    fb_ptr = driver_fb + win_rect.y1 * _rtgui_cursor->screen_pitch +
             win_rect.x1 * _rtgui_cursor->bpp;
    winrect_ptr = _rtgui_cursor->win_left;
    winrect_pitch = WIN_MOVE_BORDER * _rtgui_cursor->bpp;
    display_direct_memcpy(fb_ptr, winrect_ptr, _rtgui_cursor->screen_pitch, winrect_pitch,
                          (win_rect.y2 - win_rect.y1), winrect_pitch);

    /* save winrect right */
    fb_ptr = driver_fb + win_rect.y1 * _rtgui_cursor->screen_pitch +
             (win_rect.x2 - WIN_MOVE_BORDER) * _rtgui_cursor->bpp;
    winrect_ptr = _rtgui_cursor->win_right;
    winrect_pitch = WIN_MOVE_BORDER * _rtgui_cursor->bpp;
    display_direct_memcpy(fb_ptr, winrect_ptr, _rtgui_cursor->screen_pitch, winrect_pitch,
                          (win_rect.y2 - win_rect.y1), winrect_pitch);

    /* save winrect top */
    fb_ptr = driver_fb + win_rect.y1 * _rtgui_cursor->screen_pitch +
             (win_rect.x1 + WIN_MOVE_BORDER) * _rtgui_cursor->bpp;
    winrect_ptr = _rtgui_cursor->win_top;
    winrect_pitch = (win_rect.x2 - win_rect.x1 - 2 * WIN_MOVE_BORDER) * _rtgui_cursor->bpp;
    display_direct_memcpy(fb_ptr, winrect_ptr, _rtgui_cursor->screen_pitch, winrect_pitch,
                          WIN_MOVE_BORDER, winrect_pitch);

    /* save winrect bottom */
    fb_ptr = driver_fb + (win_rect.y2 - WIN_MOVE_BORDER) * _rtgui_cursor->screen_pitch +
             (win_rect.x1 + WIN_MOVE_BORDER) * _rtgui_cursor->bpp;
    winrect_ptr = _rtgui_cursor->win_bottom;
    display_direct_memcpy(fb_ptr, winrect_ptr, _rtgui_cursor->screen_pitch, winrect_pitch,
                          WIN_MOVE_BORDER, winrect_pitch);
}
#endif

void rtgui_mouse_monitor_append(rtgui_list_t *head, rtgui_rect_t *rect)
{
    struct rtgui_mouse_monitor *mmonitor;

    /* check parameters */
    if (head == RT_NULL || rect == RT_NULL) return;

    /* create a mouse monitor node */
    mmonitor = (struct rtgui_mouse_monitor *) rtgui_malloc(sizeof(struct rtgui_mouse_monitor));
    if (mmonitor == RT_NULL) return; /* no memory */

    /* set mouse monitor node */
    mmonitor->rect = *rect;
    rtgui_list_init(&(mmonitor->list));

    /* append to list */
    rtgui_list_append(head, &(mmonitor->list));
}

void rtgui_mouse_monitor_remove(rtgui_list_t *head, rtgui_rect_t *rect)
{
    struct rtgui_list_node *node;
    struct rtgui_mouse_monitor *mmonitor;

    /* check parameters */
    if (head == RT_NULL || rect == RT_NULL) return;

    for (node = head->next; node != RT_NULL; node = node->next)
    {
        mmonitor = rtgui_list_entry(node, struct rtgui_mouse_monitor, list);
        if (mmonitor->rect.x1 == rect->x1 &&
                mmonitor->rect.x2 == rect->x2 &&
                mmonitor->rect.y1 == rect->y1 &&
                mmonitor->rect.y2 == rect->y2)
        {
            /* found node */
            rtgui_list_remove(head, node);
            rtgui_free(mmonitor);

            return ;
        }
    }
}

rt_bool_t rtgui_mouse_monitor_contains_point(rtgui_list_t *head, int x, int y)
{
    struct rtgui_list_node *node;

    /* check parameter */
    if (head == RT_NULL) return RT_FALSE;

    rtgui_list_foreach(node, head)
    {
        struct rtgui_mouse_monitor *monitor = rtgui_list_entry(node,
                                              struct rtgui_mouse_monitor, list);

        if (rtgui_rect_contains_point(&(monitor->rect), x, y) == RT_EOK)
        {
            return RT_TRUE;
        }
    }

    return RT_FALSE;
}