/*
 * File      : rtgui_theme.c
 * This file is part of RTGUI in RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-10-04     Bernard      first version
 */

#include <rtgui/rtgui.h>
#include <rtgui/dc.h>
#include <rtgui/widgets/widget.h>
#include <rtgui/widgets/button.h>
#include <rtgui/widgets/label.h>
#include <rtgui/widgets/textbox.h>
#include <rtgui/widgets/iconbox.h>
#include <rtgui/widgets/title.h>
#include <rtgui/rtgui_theme.h>
#include <rtgui/rtgui_server.h>
#include <rtgui/rtgui_system.h>

#define SELECTED_HEIGHT         25

const rtgui_color_t default_foreground = RTGUI_RGB(0x00, 0x00, 0x00);
const rtgui_color_t default_background = RTGUI_RGB(212, 208, 200);
const rtgui_color_t selected_color = RTGUI_RGB(0xc0, 0xc0, 0xc0);
const rtgui_color_t disable_foreground = RTGUI_RGB(0x80, 0x80, 0x80);

extern struct rtgui_font rtgui_font_asc16;
extern struct rtgui_font rtgui_font_arial16;
extern struct rtgui_font rtgui_font_asc12;
extern struct rtgui_font rtgui_font_arial12;

/* init theme */
void rtgui_system_theme_init()
{
#if RTGUI_DEFAULT_FONT_SIZE == 16
    rtgui_font_set_defaut(&rtgui_font_asc16);
#elif RTGUI_DEFAULT_FONT_SIZE == 12
    rtgui_font_set_defaut(&rtgui_font_asc12);
#else
    rtgui_font_set_defaut(&rtgui_font_asc12);
#endif
}

static const rt_uint8_t close_byte[14] = {0x06, 0x18, 0x03, 0x30, 0x01, 0xE0, 0x00,
        0xC0, 0x01, 0xE0, 0x03, 0x30, 0x06, 0x18
                                         };

/* window drawing */
void rtgui_theme_draw_win(struct rtgui_topwin *win)
{
    struct rtgui_dc *dc;
    rtgui_rect_t rect;

    if (win->title == RT_NULL) return; /* no title and no board */

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(win->title));
    if (dc == RT_NULL) return;

    /* get rect */
    rtgui_widget_get_rect(RTGUI_WIDGET(win->title), &rect);

    /* draw border */
    if (win->flag & WINTITLE_BORDER)
    {
        rect.x2 -= 1;
        rect.y2 -= 1;
        RTGUI_WIDGET_FOREGROUND(win->title) = RTGUI_RGB(212, 208, 200);
        rtgui_dc_draw_hline(dc, rect.x1, rect.x2, rect.y1);
        rtgui_dc_draw_vline(dc, rect.x1, rect.y1, rect.y2);

        RTGUI_WIDGET_FOREGROUND(win->title) = white;
        rtgui_dc_draw_hline(dc, rect.x1 + 1, rect.x2 - 1, rect.y1 + 1);
        rtgui_dc_draw_vline(dc, rect.x1 + 1, rect.y1 + 1, rect.y2 - 1);

        RTGUI_WIDGET_FOREGROUND(win->title) = RTGUI_RGB(128, 128, 128);
        rtgui_dc_draw_hline(dc, rect.x1 + 1, rect.x2 - 1, rect.y2 - 1);
        rtgui_dc_draw_vline(dc, rect.x2 - 1, rect.y1 + 1, rect.y2);

        RTGUI_WIDGET_FOREGROUND(win->title) = RTGUI_RGB(64, 64, 64);
        rtgui_dc_draw_hline(dc, rect.x1, rect.x2, rect.y2);
        rtgui_dc_draw_vline(dc, rect.x2, rect.y1, rect.y2 + 1);

        /* shrink border */
        rtgui_rect_inflate(&rect, -WINTITLE_BORDER_SIZE);
    }

    /* draw title */
    if (!(win->flag & WINTITLE_NO))
    {
        rt_uint32_t index;
        float r, g, b, delta;

        if (win->flag & WINTITLE_ACTIVATE)
        {
            r = 10;
            g = 36;
            b = 106;
            delta = 150 / (float)(rect.x2 - rect.x1);
        }
        else
        {
            r = 128;
            g = 128;
            b = 128;
            delta = 64 / (float)(rect.x2 - rect.x1);
        }

        RTGUI_WIDGET_FOREGROUND(win->title) = RTGUI_RGB(r, g, b);
        for (index = rect.x1; index < rect.x2 + 1; index ++)
        {
            rtgui_dc_draw_vline(dc, index, rect.y1, rect.y2);
            r += delta;
            g += delta;
            b += delta;
        }

        if (win->flag & WINTITLE_ACTIVATE)
        {
            RTGUI_WIDGET_FOREGROUND(win->title) = white;
        }
        else
        {
            RTGUI_WIDGET_FOREGROUND(win->title) = RTGUI_RGB(212, 208, 200);
        }

        rect.x1 += 4;
        rect.y1 += 2;
        rect.y2 = rect.y1 + WINTITLE_CB_HEIGHT;
        rtgui_dc_draw_text(dc, rtgui_wintitle_get_title(win->title), &rect);

        if (win->flag & WINTITLE_CLOSEBOX)
        {
            /* get close button rect */
            rtgui_rect_t box_rect = {0, 0, WINTITLE_CB_WIDTH, WINTITLE_CB_HEIGHT};
            rtgui_rect_moveto_align(&rect, &box_rect, RTGUI_ALIGN_CENTER_VERTICAL | RTGUI_ALIGN_RIGHT);
            box_rect.x1 -= 3;
            box_rect.x2 -= 3;
            rtgui_dc_fill_rect(dc, &box_rect);

            /* draw close box */
            if (win->flag & WINTITLE_CB_PRESSED)
            {
                rtgui_dc_draw_border(dc, &box_rect, RTGUI_BORDER_SUNKEN);
                RTGUI_WIDGET_FOREGROUND(win->title) = red;
                rtgui_dc_draw_word(dc, box_rect.x1, box_rect.y1 + 6, 7, close_byte);
            }
            else
            {
                rtgui_dc_draw_border(dc, &box_rect, RTGUI_BORDER_RAISE);
                RTGUI_WIDGET_FOREGROUND(win->title) = black;
                rtgui_dc_draw_word(dc, box_rect.x1 - 1, box_rect.y1 + 5, 7, close_byte);
            }
        }
    }

    rtgui_dc_end_drawing(dc);
}

/* widget drawing */
void rtgui_theme_draw_button(rtgui_button_t *btn)
{
    /* draw button */
    struct rtgui_dc *dc;
    struct rtgui_rect rect;
    rtgui_color_t bc, fc;

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(btn));
    if (dc == RT_NULL) return;

    /* get widget rect */
    rtgui_widget_get_rect(RTGUI_WIDGET(btn), &rect);

    /* get foreground color */
    bc = RTGUI_WIDGET_BACKGROUND(btn);
    fc = RTGUI_WIDGET_FOREGROUND(btn);

    if (btn->flag & RTGUI_BUTTON_FLAG_PRESS)
    {
        /* fill button rect with background color */
        rtgui_dc_fill_rect(dc, &rect);

        if (btn->pressed_image != RT_NULL)
        {
            rtgui_rect_t image_rect;
            image_rect.x1 = 0;
            image_rect.y1 = 0;
            image_rect.x2 = btn->unpressed_image->w;
            image_rect.y2 = btn->unpressed_image->h;
            rtgui_rect_moveto_align(&rect, &image_rect, RTGUI_ALIGN_CENTER);

            rtgui_image_blit(btn->pressed_image, dc, &image_rect);
        }
        else
        {
            rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_SUNKEN);
        }
    }
    else
    {
        /* fill button rect with background color */
        rtgui_dc_fill_rect(dc, &rect);

        if (btn->unpressed_image != RT_NULL)
        {
            rtgui_rect_t image_rect;
            image_rect.x1 = 0;
            image_rect.y1 = 0;
            image_rect.x2 = btn->unpressed_image->w;
            image_rect.y2 = btn->unpressed_image->h;
            rtgui_rect_moveto_align(&rect, &image_rect, RTGUI_ALIGN_CENTER);

            rtgui_image_blit(btn->unpressed_image, dc, &image_rect);
        }
        else
        {
            rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_RAISE);
        }
    }

    if (RTGUI_WIDGET_IS_FOCUSED(btn))
    {
        /* re-set foreground and get default rect */
        rtgui_widget_get_rect(RTGUI_WIDGET(btn), &rect);
        rtgui_rect_inflate(&rect, -2);

        RTGUI_WIDGET_FOREGROUND(btn) = black;
        rtgui_dc_draw_focus_rect(dc, &rect);
    }

    /* set forecolor */
    RTGUI_WIDGET_BACKGROUND(btn) = bc;
    RTGUI_WIDGET_FOREGROUND(btn) = fc;

    if (btn->pressed_image == RT_NULL)
    {
        /* re-set foreground and get default rect */
        rtgui_widget_get_rect(RTGUI_WIDGET(btn), &rect);

        /* remove border */
        rtgui_rect_inflate(&rect, -2);

        /* draw text */
        rtgui_dc_draw_text(dc, rtgui_label_get_text(RTGUI_LABEL(btn)), &rect);
    }

    /* end drawing */
    rtgui_dc_end_drawing(dc);
}

void rtgui_theme_draw_label(rtgui_label_t *label)
{
    /* draw label */
    struct rtgui_dc *dc;
    struct rtgui_rect rect;

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(label));
    if (dc == RT_NULL) return;

    rtgui_widget_get_rect(RTGUI_WIDGET(label), &rect);
    rtgui_dc_fill_rect(dc, &rect);

    /* default left and center draw */
    rtgui_dc_draw_text(dc, rtgui_label_get_text(label), &rect);

    /* end drawing */
    rtgui_dc_end_drawing(dc);
}

#define RTGUI_TEXTBOX_MARGIN    3
void rtgui_theme_draw_textbox(rtgui_textbox_t *box)
{
    /* draw button */
    struct rtgui_dc *dc;
    struct rtgui_rect rect;
    rtgui_color_t fc;

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(box));
    if (dc == RT_NULL) return;

    /* get widget rect */
    rtgui_widget_get_rect(RTGUI_WIDGET(box), &rect);
    fc = RTGUI_WIDGET_FOREGROUND(box);

    /* fill widget rect with white color */
    RTGUI_WIDGET_BACKGROUND(box) = white;
    rtgui_dc_fill_rect(dc, &rect);

    /* draw border */
    RTGUI_WIDGET_FOREGROUND(box) = RTGUI_RGB(123, 158, 189);
    rtgui_dc_draw_rect(dc, &rect);

    /* draw text */
    RTGUI_WIDGET_FOREGROUND(box) = fc;
    if (box->text != RT_NULL)
    {
        rect.x1 += RTGUI_TEXTBOX_MARGIN;

        if (box->flag & RTGUI_TEXTBOX_MASK)
        {
            /* draw '*' */
            rt_size_t len = rt_strlen(box->text);
            if (len > 0)
            {
                char *text_mask = rtgui_malloc(len + 1);
                rt_memset(text_mask, '*', len + 1);
                text_mask[len] = 0;
                rtgui_dc_draw_text(dc, text_mask, &rect);
                rtgui_free(text_mask);
            }
        }
        else
        {
            rtgui_dc_draw_text(dc, box->text, &rect);
        }

        /* draw caret */
        if (box->flag & RTGUI_TEXTBOX_CARET_SHOW)
        {
            rect.x1 += box->position * box->font_width;
            rect.x2 = rect.x1 + box->font_width;

            rect.y2 -= 2;
            rect.y1 = rect.y2 - 3;

            RTGUI_WIDGET_BACKGROUND(box) = black;
            rtgui_dc_fill_rect(dc, &rect);
        }
    }

    /* end drawing */
    rtgui_dc_end_drawing(dc);
}

void rtgui_theme_draw_iconbox(rtgui_iconbox_t *iconbox)
{
    struct rtgui_dc *dc;
    struct rtgui_rect rect;
    struct rtgui_rect text_rect;

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(iconbox));
    if (dc == RT_NULL) return;

    /* get widget rect */
    rtgui_widget_get_rect(RTGUI_WIDGET(iconbox), &rect);

    /* draw icon */
    rtgui_image_blit(iconbox->image, dc, &rect);

    /* draw text */
    if (iconbox->text_position == RTGUI_ICONBOX_TEXT_BELOW && iconbox->text != RT_NULL)
    {
        rect.y1 = iconbox->image->h + RTGUI_WIDGET_DEFAULT_MARGIN;
        rtgui_font_get_metrics(rtgui_dc_get_gc(dc)->font, iconbox->text, &text_rect);
        rtgui_rect_moveto_align(&rect, &text_rect, RTGUI_ALIGN_CENTER);
        rtgui_dc_draw_text(dc, iconbox->text, &text_rect);
    }
    else if (iconbox->text_position == RTGUI_ICONBOX_TEXT_RIGHT && iconbox->text != RT_NULL)
    {
        rect.x1 = iconbox->image->w + RTGUI_WIDGET_DEFAULT_MARGIN;
        rtgui_font_get_metrics(rtgui_dc_get_gc(dc)->font, iconbox->text, &text_rect);
        rtgui_rect_moveto_align(&rect, &text_rect, RTGUI_ALIGN_CENTER);
        rtgui_dc_draw_text(dc, iconbox->text, &text_rect);
    }

    /* end drawing */
    rtgui_dc_end_drawing(dc);
}

static const rt_uint8_t checked_byte[7] = {0x02, 0x06, 0x8E, 0xDC, 0xF8, 0x70, 0x20};
void rtgui_theme_draw_checkbox(struct rtgui_checkbox *checkbox)
{
    struct rtgui_dc *dc;
    struct rtgui_rect rect, box_rect;
    rtgui_color_t bc, fc;

    fc = RTGUI_WIDGET_FOREGROUND(checkbox);
    bc = RTGUI_WIDGET_BACKGROUND(checkbox);

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(checkbox));
    if (dc == RT_NULL) return;

    /* get rect */
    rtgui_widget_get_rect(RTGUI_WIDGET(checkbox), &rect);

    /* fill rect */
    rtgui_dc_fill_rect(dc, &rect);

    if (RTGUI_WIDGET_IS_FOCUSED(checkbox))
    {
        RTGUI_WIDGET_FOREGROUND(checkbox) = black;

        /* draw focused border */
        rtgui_rect_inflate(&rect, -1);
        rtgui_dc_draw_focus_rect(dc, &rect);

        rtgui_rect_inflate(&rect, 1);
    }

    /* draw check box */
    box_rect.x1 = 0;
    box_rect.y1 = 0;
    box_rect.x2 = CHECK_BOX_W;
    box_rect.y2 = CHECK_BOX_H;
    rtgui_rect_moveto_align(&rect, &box_rect, RTGUI_ALIGN_CENTER_VERTICAL);
    box_rect.x1 += 2;
    box_rect.x2 += 2;

    rtgui_dc_draw_border(dc, &box_rect, RTGUI_BORDER_BOX);
    rtgui_rect_inflate(&box_rect, -1);
    RTGUI_WIDGET_BACKGROUND(checkbox) = RTGUI_RGB(247, 247, 246);
    rtgui_dc_fill_rect(dc, &box_rect);
    if (checkbox->status_down == RTGUI_CHECKBOX_STATUS_CHECKED)
    {
        RTGUI_WIDGET_FOREGROUND(checkbox) = RTGUI_RGB(33, 161, 33);
        rtgui_dc_draw_byte(dc, box_rect.x1 + 2, box_rect.y1 + 2, 7, checked_byte);
    }

    /* restore saved color */
    RTGUI_WIDGET_BACKGROUND(checkbox) = bc;
    RTGUI_WIDGET_FOREGROUND(checkbox) = fc;

    /* draw text */
    rect.x1 += rtgui_rect_height(rect) - 4 + 5;
    rtgui_dc_draw_text(dc, rtgui_label_get_text(RTGUI_LABEL(checkbox)), &rect);

    /* end drawing */
    rtgui_dc_end_drawing(dc);

    return;
}

static const rt_uint8_t radio_unchecked_byte[] =
{
    0x0f, 0x00, 0x30, 0xc0, 0x40, 0x20,
    0x40, 0x20, 0x80, 0x10, 0x80, 0x10,
    0x80, 0x10, 0x80, 0x10, 0x40, 0x20,
    0x40, 0x20, 0x30, 0xc0, 0x0f, 0x00,
};
static const rt_uint8_t radio_checked_byte[] =
{
    0x0f, 0x00, 0x30, 0xc0, 0x40, 0x20,
    0x40, 0x20, 0x86, 0x10, 0x8f, 0x10,
    0x8f, 0x10, 0x86, 0x10, 0x40, 0x20,
    0x40, 0x20, 0x30, 0xc0, 0x0f, 0x00,
};

void rtgui_theme_draw_radiobutton(struct rtgui_radiobox *radiobox, rt_uint16_t item)
{
    struct rtgui_dc *dc;
    struct rtgui_rect rect, item_rect;
    int item_size, bord_size;

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(radiobox));
    if (dc == RT_NULL) return;
    /* get widget rect */
    rtgui_widget_get_rect(RTGUI_WIDGET(radiobox), &rect);

    item_size = radiobox->item_size;
    /* get board size */
    if (radiobox->orient == RTGUI_VERTICAL)
        bord_size = item_size;
    else
    {
        rtgui_font_get_metrics(RTGUI_DC_FONT(dc), "H", &item_rect);
        bord_size = rtgui_rect_height(item_rect);
    }

    item_rect = rect;
    rtgui_rect_inflate(&item_rect, - bord_size);
    if (radiobox->orient == RTGUI_VERTICAL)
    {
        /* set the first text rect */
        item_rect.y1 += item * item_size;
        item_rect.y2 = item_rect.y1 + item_size;

        /* draw radio */
        if (radiobox->item_selection == item)
        {
            if (RTGUI_WIDGET_IS_FOCUSED(radiobox))
                rtgui_dc_draw_focus_rect(dc, &item_rect);

            rtgui_dc_draw_word(dc, item_rect.x1, item_rect.y1 + (item_size - RADIO_BOX_H) / 2,
                               RADIO_BOX_H, radio_checked_byte);
        }
        else
        {
            item_rect.x2 += 1;
            item_rect.y2 += 1;
            rtgui_dc_fill_rect(dc, &item_rect);
            item_rect.x2 -= 1;
            item_rect.y2 -= 1;
            rtgui_dc_draw_word(dc, item_rect.x1, item_rect.y1 + (item_size - RADIO_BOX_H) / 2,
                               RADIO_BOX_H, radio_unchecked_byte);
        }

        /* draw text */
        item_rect.x1 += item_size + 3;
        rtgui_dc_draw_text(dc, radiobox->items[item], &item_rect);
    }
    else
    {
        item_rect.x1 += item * item_size;

        /* set the first text rect */
        item_rect.x2 = item_rect.x1 + item_size - 1;
        item_rect.y2 = item_rect.y1 + bord_size;

        /* draw radio */
        if (radiobox->item_selection == item)
        {
            if (RTGUI_WIDGET_IS_FOCUSED(radiobox))
                rtgui_dc_draw_focus_rect(dc, &item_rect);
            rtgui_dc_draw_word(dc, item_rect.x1, item_rect.y1, RADIO_BOX_H, radio_checked_byte);
        }
        else
        {
            item_rect.x2 += 1;
            item_rect.y2 += 1;
            rtgui_dc_fill_rect(dc, &item_rect);
            item_rect.x2 -= 1;
            item_rect.y2 -= 1;
            rtgui_dc_draw_word(dc, item_rect.x1, item_rect.y1, RADIO_BOX_H, radio_unchecked_byte);
        }

        /* draw text */
        item_rect.x1 += bord_size + 3;
        rtgui_dc_draw_text(dc, radiobox->items[item], &item_rect);
    }

    /* end drawing */
    rtgui_dc_end_drawing(dc);
}

void rtgui_theme_draw_radiobox(struct rtgui_radiobox *radiobox)
{
    struct rtgui_dc *dc;
    struct rtgui_rect rect, item_rect;
    int item_size, bord_size, index;
    rtgui_color_t fc;

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(radiobox));
    if (dc == RT_NULL) return;

    /* get widget rect */
    rtgui_widget_get_rect(RTGUI_WIDGET(radiobox), &rect);
    rtgui_dc_fill_rect(dc, &rect);

    item_size = radiobox->item_size;
    /* get board size */
    if (radiobox->orient == RTGUI_VERTICAL)
        bord_size = item_size;
    else
    {
        rtgui_font_get_metrics(RTGUI_DC_FONT(dc), "H", &item_rect);
        bord_size = rtgui_rect_height(item_rect);
    }

    /* draw box */
    rtgui_rect_inflate(&rect, -bord_size / 2);
    fc = RTGUI_WIDGET_FOREGROUND(radiobox);

    RTGUI_WIDGET_FOREGROUND(radiobox) = white;
    rect.x1 ++;
    rect.y1 ++;
    rect.x2 ++;
    rect.y2 ++;
    rtgui_dc_draw_rect(dc, &rect);

    RTGUI_WIDGET_FOREGROUND(radiobox) = RTGUI_RGB(128, 128, 128);
    rect.x1 --;
    rect.y1 --;
    rect.x2 --;
    rect.y2 --;
    rtgui_dc_draw_rect(dc, &rect);

    RTGUI_WIDGET_FOREGROUND(radiobox) = fc;

    rtgui_rect_inflate(&rect, bord_size / 2);
    if (radiobox->text != RT_NULL)
    {
        struct rtgui_rect text_rect;

        /* draw group text */
        rtgui_font_get_metrics(RTGUI_DC_FONT(dc), radiobox->text, &text_rect);
        rtgui_rect_moveto(&text_rect, rect.x1 + bord_size + 5, rect.y1);
        rect.x1 -= 5;
        rect.x2 += 5;
        rtgui_dc_fill_rect(dc, &text_rect);
        rect.x1 += 5;
        rect.x2 -= 5;
        rtgui_dc_draw_text(dc, radiobox->text, &text_rect);
    }

    /* set init item rect */
    item_rect = rect;
    rtgui_rect_inflate(&item_rect, - bord_size);

    if (radiobox->orient == RTGUI_VERTICAL)
    {
        rt_uint16_t offset;

        /* set the first text rect */
        item_rect.y2 = item_rect.y1 + item_size;

        offset = (item_size - RADIO_BOX_H) / 2;
        /* draw each radio button */
        for (index = 0; index < radiobox->item_count; index ++)
        {
            if (item_rect.y2 > rect.y2 - item_size) break;

            /* draw radio */
            if (radiobox->item_selection == index)
            {
                if (RTGUI_WIDGET_IS_FOCUSED(radiobox))
                    rtgui_dc_draw_focus_rect(dc, &item_rect);

                rtgui_dc_draw_word(dc, item_rect.x1, item_rect.y1 + offset, RADIO_BOX_H, radio_checked_byte);
            }
            else
            {
                rtgui_dc_draw_word(dc, item_rect.x1, item_rect.y1 + offset, RADIO_BOX_H, radio_unchecked_byte);
            }

            /* draw text */
            item_rect.x1 += item_size + 3;
            rtgui_dc_draw_text(dc, radiobox->items[index], &item_rect);
            item_rect.x1 -= item_size + 3;

            item_rect.y1 += item_size;
            item_rect.y2 += item_size;
        }
    }
    else
    {
        /* set the first text rect */
        item_rect.x2 = item_rect.x1 + item_size;
        item_rect.y2 = item_rect.y1 + bord_size;

        /* draw each radio button */
        for (index = 0; index < radiobox->item_count; index ++)
        {
            if (item_rect.x2 > rect.x2 - item_size) break;

            /* draw radio */
            if (radiobox->item_selection == index)
            {
                if (RTGUI_WIDGET_IS_FOCUSED(radiobox))
                    rtgui_dc_draw_focus_rect(dc, &item_rect);
                rtgui_dc_draw_word(dc, item_rect.x1, item_rect.y1, RADIO_BOX_H, radio_checked_byte);
            }
            else
            {
                rtgui_dc_draw_word(dc, item_rect.x1, item_rect.y1, RADIO_BOX_H, radio_unchecked_byte);
            }

            /* draw text */
            item_rect.x1 += bord_size + 3;
            rtgui_dc_draw_text(dc, radiobox->items[index], &item_rect);
            item_rect.x1 -= bord_size + 3;

            item_rect.x1 += item_size;
            item_rect.x2 += (item_size - 1);
        }
    }

    /* end drawing */
    rtgui_dc_end_drawing(dc);
}

void rtgui_theme_draw_slider(struct rtgui_slider *slider)
{
    /* draw button */
    struct rtgui_dc *dc;
    int i, xsize, x0;
    rtgui_rect_t r, focus_rect, slider_rect, slot_rect;

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(slider));
    if (dc == RT_NULL) return;

    /* get widget rect */
    rtgui_widget_get_rect(RTGUI_WIDGET(slider), &focus_rect);
    /* fill widget rect with background color */
    rtgui_dc_fill_rect(dc, &focus_rect);
    r = focus_rect;

    if (slider->orient == RTGUI_VERTICAL)
    {
        rtgui_rect_inflate(&r, -1);
        xsize = r.y2 - r.y1  + 1 - slider->thumb_width;
        x0 = r.y1 + slider->thumb_width / 2;

        /* calculate thumb position */
        slider_rect = r;
        slider_rect.x1 = 5;
        slider_rect.y1 = x0 + xsize * (slider->value - slider->min) / (slider->max - slider->min) - slider->thumb_width / 2;
        slider_rect.y2  = slider_rect.y1 + slider->thumb_width;

        /* calculate slot position */
        slot_rect.y1 = x0;
        slot_rect.y2 = x0 + xsize;
        slot_rect.x1 = (slider_rect.x1 + slider_rect.x2) / 2 - 1;
        slot_rect.x2 = slot_rect.x1 + 3;
        /* draw slot */
        rtgui_dc_draw_border(dc, &slot_rect, RTGUI_BORDER_RAISE);

        /* draw the ticks */
        for (i = 0; i <= slider->ticks; i++)
        {
            int x = x0 + xsize * i / slider->ticks;
            rtgui_dc_draw_hline(dc, 1, 3, x);
        }

        /* draw the thumb */
        rtgui_dc_fill_rect(dc, &slider_rect);
        rtgui_dc_draw_border(dc, &slider_rect, RTGUI_BORDER_RAISE);
    }
    else
    {
        rtgui_rect_inflate(&r, -1);
        xsize = r.x2 - r.x1  + 1 - slider->thumb_width;
        x0 = r.x1 + slider->thumb_width / 2;

        /* calculate thumb position */
        slider_rect = r;
        slider_rect.y1 = 5;
        slider_rect.x1 = x0 + xsize * (slider->value - slider->min) / (slider->max - slider->min) - slider->thumb_width / 2;
        slider_rect.x2  = slider_rect.x1 + slider->thumb_width;

        /* calculate slot position */
        slot_rect.x1 = x0;
        slot_rect.x2 = x0 + xsize;
        slot_rect.y1 = (slider_rect.y1 + slider_rect.y2) / 2 - 1;
        slot_rect.y2 = slot_rect.y1 + 3;
        /* draw slot */
        rtgui_dc_draw_border(dc, &slot_rect, RTGUI_BORDER_RAISE);

        /* draw the ticks */
        for (i = 0; i <= slider->ticks; i++)
        {
            int x = x0 + xsize * i / slider->ticks;
            rtgui_dc_draw_vline(dc, x, 1, 3);
        }

        /* draw the thumb */
        rtgui_dc_fill_rect(dc, &slider_rect);
        rtgui_dc_draw_border(dc, &slider_rect, RTGUI_BORDER_RAISE);
    }

    /* draw focus */
    if (RTGUI_WIDGET_IS_FOCUSED(slider))
    {
        rtgui_dc_draw_focus_rect(dc, &focus_rect);
    }

    /* end drawing */
    rtgui_dc_end_drawing(dc);
    return;
}

void rtgui_theme_draw_progressbar(struct rtgui_progressbar *bar)
{
    /* draw progress bar */
    struct rtgui_dc *dc;
    struct rtgui_rect rect;
    int max = bar->range;
    int pos = bar->position;
    int left;
    rtgui_color_t bc;

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(&(bar->parent));
    if (dc == RT_NULL) return;

    bc = RTGUI_DC_BC(dc);
    rtgui_widget_get_rect(&(bar->parent), &rect);

    /* fill button rect with background color */
    RTGUI_WIDGET_BACKGROUND(bar) = RTGUI_RGB(212, 208, 200);

    /* draw border */
    rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_SUNKEN);

    /* Nothing to draw */
    if (max == 0)
    {
        rtgui_dc_end_drawing(dc);
        return;
    }

    rect.x2 ++;
    rect.y2 ++;
    left = max - pos;
    rtgui_rect_inflate(&rect, -2);
    RTGUI_WIDGET_BACKGROUND(bar) = RTGUI_RGB(0, 0, 255);
    rect.y2 --;
    rect.x2 --;

    if (bar->orient == RTGUI_VERTICAL)
    {
        /* Vertical bar grows from bottom to top */
        int dy = (rtgui_rect_height(rect) * left) / max;
        rect.y1 += dy;
        rtgui_dc_fill_rect(dc, &rect);

        RTGUI_DC_BC(dc) = bc;
        rect.y1 -= dy;
        rect.y2 = dy;
        rtgui_dc_fill_rect(dc, &rect);
    }
    else
    {
        /* Horizontal bar grows from left to right */
        int dx = (rtgui_rect_width(rect) * left) / max;
        rect.x2 -= dx;
        rtgui_dc_fill_rect(dc, &rect);

        RTGUI_DC_BC(dc) = bc;
        rect.x1 = rect.x2;
        rect.x2 += dx;
        rtgui_dc_fill_rect(dc, &rect);
    }

    /* end drawing */
    rtgui_dc_end_drawing(dc);
    return;
}

void rtgui_theme_draw_staticline(struct rtgui_staticline *staticline)
{
    struct rtgui_dc *dc;
    struct rtgui_rect rect;

    /* begin drawing */
    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(staticline));
    if (dc == RT_NULL) return ;

    rtgui_widget_get_rect(RTGUI_WIDGET(staticline), &rect);
    rtgui_dc_fill_rect(dc, &rect);

    if (staticline->orient == RTGUI_HORIZONTAL)
    {
        rtgui_dc_draw_horizontal_line(dc, rect.x1, rect.x2, rect.y1);
    }
    else
    {
        rtgui_dc_draw_vertical_line(dc, rect.x1, rect.y1, rect.y2);
    }

    rtgui_dc_end_drawing(dc);
}

rt_uint16_t rtgui_theme_get_selected_height()
{
    return SELECTED_HEIGHT;
}

void rtgui_theme_draw_selected(struct rtgui_dc *dc, rtgui_rect_t *rect)
{
    rtgui_color_t bc;
    rt_uint16_t index;

    bc = RTGUI_DC_FC(dc);
    RTGUI_DC_FC(dc) = selected_color;

    rtgui_dc_draw_hline(dc, rect->x1 + 3, rect->x2 - 2, rect->y1 + 1);
    rtgui_dc_draw_hline(dc, rect->x1 + 3, rect->x2 - 2, rect->y2 - 2);

    rtgui_dc_draw_vline(dc, rect->x1 + 2, rect->y1 + 2, rect->y2 - 2);
    rtgui_dc_draw_vline(dc, rect->x2 - 2, rect->y1 + 2, rect->y2 - 2);

    for (index = rect->y1 + 1; index < rect->y2 - 2; index ++)
        rtgui_dc_draw_hline(dc, rect->x1 + 3, rect->x2 - 2, index);

    RTGUI_DC_FC(dc) = bc;
}

/* get default background color */
rtgui_color_t rtgui_theme_default_bc()
{
    return default_background;
}

/* get default foreground color */
rtgui_color_t rtgui_theme_default_fc()
{
    return default_foreground;
}