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rt-thread-official/components/rtgui/widgets/list_view.c

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/*
* File : list_view.c
* This file is part of RTGUI in RT-Thread RTOS
* COPYRIGHT (C) 2010, 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
* 2010-01-06 Bernard first version
*/
#include <rtgui/rtgui_theme.h>
#include <rtgui/widgets/list_view.h>
#define LIST_MARGIN 5
static void _rtgui_list_view_constructor(struct rtgui_list_view *view)
{
/* default rect */
struct rtgui_rect rect = {0, 0, 200, 200};
/* set default widget rect and set event handler */
rtgui_object_set_event_handler(RTGUI_OBJECT(view),rtgui_list_view_event_handler);
rtgui_widget_set_rect(RTGUI_WIDGET(view), &rect);
RTGUI_WIDGET(view)->flag |= RTGUI_WIDGET_FLAG_FOCUSABLE;
view->flag = RTGUI_LIST_VIEW_LIST;
view->current_item = 0;
view->items_count = 0;
view->page_items = 0;
RTGUI_WIDGET_BACKGROUND(RTGUI_WIDGET(view)) = white;
RTGUI_WIDGET_TEXTALIGN(RTGUI_WIDGET(view)) = RTGUI_ALIGN_CENTER_VERTICAL;
}
DEFINE_CLASS_TYPE(listview, "listview",
RTGUI_CONTAINER_TYPE,
_rtgui_list_view_constructor,
RT_NULL,
sizeof(struct rtgui_list_view));
static void rtgui_list_view_onicondraw(struct rtgui_list_view* view, struct rtgui_dc *dc)
{
struct rtgui_rect rect, item_rect, drawing_rect;
rt_ubase_t c, r, item_index; /* col and row index */
rt_ubase_t item_width, item_height;
rtgui_image_t* image;
if (view->items_count == 0) return;
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
item_index = (view->current_item / view->page_items) * view->page_items;
item_width = (rtgui_rect_width(rect) - 2 * LIST_MARGIN)/view->col_items;
item_height = (rtgui_rect_height(rect) - 4)/view->row_items;
image = view->items[0].image;
for (r = 0; r < view->row_items; r ++)
{
for (c = 0; c < view->col_items; c ++)
{
if (item_index < view->items_count)
{
item_rect.y1 = rect.y1 + LIST_MARGIN + r * item_height;
item_rect.x1 = rect.x1 + LIST_MARGIN + c * item_width;
item_rect.x2 = item_rect.x1 + item_width;
item_rect.y2 = item_rect.y1 + item_height;
if (item_index == view->current_item)
{
rtgui_theme_draw_selected(dc, &item_rect);
}
drawing_rect.x1 = drawing_rect.y1 = 0;
drawing_rect.x2 = image->w;
drawing_rect.y2 = image->h;
rtgui_rect_moveto_align(&item_rect, &drawing_rect, RTGUI_ALIGN_CENTER_HORIZONTAL);
drawing_rect.y1 += 5; drawing_rect.y2 += 5;
rtgui_image_blit(view->items[item_index].image, dc, &drawing_rect);
item_rect.y1 = drawing_rect.y2 + LIST_MARGIN;
item_rect.x1 += 3; item_rect.x2 -=3;
rtgui_font_get_metrics(RTGUI_WIDGET_FONT(RTGUI_WIDGET(view)), view->items[item_index].name,
&drawing_rect);
rtgui_rect_moveto_align(&item_rect, &drawing_rect, RTGUI_ALIGN_CENTER_HORIZONTAL);
rtgui_dc_draw_text(dc, view->items[item_index].name, &drawing_rect);
item_index ++;
}
else break;
}
}
}
static void rtgui_list_view_update_icon(struct rtgui_list_view* view, rt_int16_t old_item)
{
struct rtgui_rect rect, item_rect, drawing_rect;
rt_ubase_t c, r; /* col and row index */
rt_ubase_t item_width, item_height;
rtgui_image_t* image;
struct rtgui_dc* dc;
if ((view->items_count == 0) ||
(old_item == view->current_item))
return;
if (old_item/view->page_items != view->current_item/view->page_items)
{
/* it's not a same page, update all */
rtgui_widget_update(RTGUI_WIDGET(view));
return;
}
dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(view));
if (dc == RT_NULL) return;
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
item_width = (rtgui_rect_width(rect) - 2 * LIST_MARGIN)/view->col_items;
item_height = (rtgui_rect_height(rect) - 4)/view->row_items;
image = view->items[0].image;
/* update old item */
r = (old_item % view->page_items)/ view->col_items;
c = (old_item % view->page_items)% view->col_items;
item_rect.y1 = rect.y1 + LIST_MARGIN + r * item_height;
item_rect.x1 = rect.x1 + LIST_MARGIN + c * item_width;
item_rect.x2 = item_rect.x1 + item_width;
item_rect.y2 = item_rect.y1 + item_height;
rtgui_dc_fill_rect(dc, &item_rect);
/* draw image */
drawing_rect.x1 = drawing_rect.y1 = 0;
drawing_rect.x2 = image->w;
drawing_rect.y2 = image->h;
rtgui_rect_moveto_align(&item_rect, &drawing_rect, RTGUI_ALIGN_CENTER_HORIZONTAL);
drawing_rect.y1 += 5; drawing_rect.y2 += 5;
rtgui_image_blit(view->items[old_item].image, dc, &drawing_rect);
/* draw text */
item_rect.y1 = drawing_rect.y2 + LIST_MARGIN;
item_rect.x1 += 3; item_rect.x2 -=3;
rtgui_font_get_metrics(RTGUI_WIDGET_FONT(RTGUI_WIDGET(view)), view->items[old_item].name,
&drawing_rect);
rtgui_rect_moveto_align(&item_rect, &drawing_rect, RTGUI_ALIGN_CENTER_HORIZONTAL);
rtgui_dc_draw_text(dc, view->items[old_item].name, &drawing_rect);
/* update new item as selected */
r = (view->current_item % view->page_items) / view->col_items;
c = (view->current_item % view->page_items) % view->col_items;
item_rect.y1 = rect.y1 + LIST_MARGIN + r * item_height;
item_rect.x1 = rect.x1 + LIST_MARGIN + c * item_width;
item_rect.x2 = item_rect.x1 + item_width;
item_rect.y2 = item_rect.y1 + item_height;
rtgui_theme_draw_selected(dc, &item_rect);
/* draw image */
drawing_rect.x1 = 0;
drawing_rect.y1 = 3;
drawing_rect.x2 = image->w;
drawing_rect.y2 = 3 + image->h;
rtgui_rect_moveto_align(&item_rect, &drawing_rect, RTGUI_ALIGN_CENTER_HORIZONTAL);
rtgui_image_blit(view->items[view->current_item].image, dc, &drawing_rect);
/* draw text */
item_rect.y1 = drawing_rect.y2 + LIST_MARGIN;
item_rect.x1 += 3; item_rect.x2 -=3;
rtgui_font_get_metrics(RTGUI_WIDGET_FONT(RTGUI_WIDGET(view)),
view->items[view->current_item].name,
&drawing_rect);
rtgui_rect_moveto_align(&item_rect, &drawing_rect, RTGUI_ALIGN_CENTER_HORIZONTAL);
rtgui_dc_draw_text(dc, view->items[view->current_item].name, &drawing_rect);
rtgui_dc_end_drawing(dc);
}
static void rtgui_list_view_onlistdraw(struct rtgui_list_view* view, struct rtgui_dc *dc)
{
rt_ubase_t index, page_index;
rtgui_rect_t rect, item_rect, image_rect;
const struct rtgui_list_item* item;
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
/* get item base rect */
item_rect = rect;
item_rect.y1 += 2;
item_rect.y2 = item_rect.y1 + (2 + rtgui_theme_get_selected_height());
/* get current page */
page_index = (view->current_item / view->page_items) * view->page_items;
for (index = 0; index < view->page_items; index ++)
{
if (page_index + index >= view->items_count) break;
item = &(view->items[page_index + index]);
if (page_index + index == view->current_item)
{
rtgui_theme_draw_selected(dc, &item_rect);
}
item_rect.x1 += LIST_MARGIN;
if (item->image != RT_NULL)
{
/* blit on center */
image_rect.x1 = 0; image_rect.y1 = 0;
image_rect.x2 = item->image->w;
image_rect.y2 = item->image->h;
rtgui_rect_moveto_align(&item_rect, &image_rect, RTGUI_ALIGN_CENTER_VERTICAL);
rtgui_image_blit(item->image, dc, &image_rect);
item_rect.x1 += item->image->w + 2;
}
/* draw text */
rtgui_dc_draw_text(dc, item->name, &item_rect);
if (item->image != RT_NULL)
item_rect.x1 -= (item->image->w + 2);
item_rect.x1 -= LIST_MARGIN;
/* move to next item position */
item_rect.y1 += (rtgui_theme_get_selected_height() + 2);
item_rect.y2 += (rtgui_theme_get_selected_height() + 2);
}
}
void rtgui_list_view_update_list(struct rtgui_list_view* view, rt_int16_t old_item)
{
struct rtgui_dc* dc;
const struct rtgui_list_item* item;
rtgui_rect_t rect, item_rect;
if (old_item/view->page_items != view->current_item/view->page_items)
{
/* it's not a same page, update all */
rtgui_widget_update(RTGUI_WIDGET(view));
return;
}
dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(view));
if (dc == RT_NULL) return;
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
/* get old item's rect and draw old item */
item_rect.x1 = rect.x1; item_rect.x2 = rect.x2;
item_rect.y1 = rect.y1 + 2;
item_rect.y1 += (old_item % view->page_items) * (2 + rtgui_theme_get_selected_height());
item_rect.y2 = item_rect.y1 + (2 + rtgui_theme_get_selected_height());
rtgui_dc_fill_rect(dc, &item_rect);
item_rect.x1 += LIST_MARGIN;
item = &(view->items[old_item]);
if (item->image != RT_NULL)
{
struct rtgui_rect image_rect;
/* blit on center */
image_rect.x1 = 0; image_rect.y1 = 0;
image_rect.x2 = item->image->w;
image_rect.y2 = item->image->h;
rtgui_rect_moveto_align(&item_rect, &image_rect, RTGUI_ALIGN_CENTER_VERTICAL);
rtgui_image_blit(item->image, dc, &image_rect);
item_rect.x1 += item->image->w + 2;
}
rtgui_dc_draw_text(dc, item->name, &item_rect);
/* draw current item */
item_rect = rect;
/* get current item's rect */
item_rect.y1 += 2;
item_rect.y1 += (view->current_item % view->page_items) * (2 + rtgui_theme_get_selected_height());
item_rect.y2 = item_rect.y1 + (2 + rtgui_theme_get_selected_height());
/* draw current item */
rtgui_theme_draw_selected(dc, &item_rect);
item_rect.x1 += LIST_MARGIN;
item = &(view->items[view->current_item]);
if (item->image != RT_NULL)
{
struct rtgui_rect image_rect;
/* blit on center */
image_rect.x1 = 0; image_rect.y1 = 0;
image_rect.x2 = item->image->w;
image_rect.y2 = item->image->h;
rtgui_rect_moveto_align(&item_rect, &image_rect, RTGUI_ALIGN_CENTER_VERTICAL);
rtgui_image_blit(item->image, dc, &image_rect);
item_rect.x1 += (item->image->w + 2);
}
rtgui_dc_draw_text(dc, item->name, &item_rect);
rtgui_dc_end_drawing(dc);
}
void rtgui_list_view_ondraw(struct rtgui_list_view* view)
{
struct rtgui_rect rect;
struct rtgui_dc* dc;
dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(view));
if (dc == RT_NULL) return;
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
rtgui_dc_fill_rect(dc, &rect);
switch (view->flag)
{
case RTGUI_LIST_VIEW_LIST:
rtgui_list_view_onlistdraw(view, dc);
break;
case RTGUI_LIST_VIEW_ICON:
rtgui_list_view_onicondraw(view, dc);
break;
}
rtgui_dc_end_drawing(dc);
}
static rt_bool_t rtgui_list_view_onmouse(struct rtgui_list_view* view, struct rtgui_event_mouse* emouse)
{
rtgui_rect_t rect;
/* calculate selected item */
/* get physical extent information */
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
rtgui_widget_rect_to_device(RTGUI_WIDGET(view), &rect);
if (rtgui_rect_contains_point(&rect, emouse->x, emouse->y) == RT_EOK)
{
rt_uint16_t index;
rt_uint16_t old_item;
/* get old item */
old_item = view->current_item;
switch (view->flag)
{
case RTGUI_LIST_VIEW_LIST:
index = (emouse->y - rect.y1) / (2 + rtgui_theme_get_selected_height());
if ((index < view->items_count) && (index < view->page_items))
{
/* set selected item */
view->current_item = (view->current_item/view->page_items) * view->page_items + index;
if (emouse->button & RTGUI_MOUSE_BUTTON_DOWN)
{
/* down event */
rtgui_list_view_update_list(view, old_item);
}
else
{
/* up event */
if (view->items[view->current_item].action != RT_NULL)
{
view->items[view->current_item].action(RTGUI_WIDGET(view),
view->items[view->current_item].parameter);
}
}
}
break;
case RTGUI_LIST_VIEW_ICON:
{
rt_uint16_t x, y;
rt_uint16_t item_height, item_width;
rt_ubase_t current_page;
item_width = (rtgui_rect_width(rect) - 2 * LIST_MARGIN)/view->col_items;
item_height = (rtgui_rect_height(rect) - 4)/view->row_items;
x = emouse->x - rect.x1;
y = emouse->y - rect.y1;
index = (y / item_height * view->col_items) + x / item_width;
current_page = view->current_item / view->page_items;
if ((index + (current_page * view->page_items) < view->items_count))
{
if (emouse->button & RTGUI_MOUSE_BUTTON_DOWN)
{
view->current_item = index + (current_page * view->page_items);
/* down event */
rtgui_list_view_update_icon(view, old_item);
}
else
{
/* up event */
if (view->items[view->current_item].action != RT_NULL)
{
view->items[view->current_item].action(RTGUI_WIDGET(view),
view->items[view->current_item].parameter);
}
}
}
}
break;
case RTGUI_LIST_VIEW_REPORT:
break;
}
return RT_TRUE;
}
return RT_FALSE;
}
rt_bool_t rtgui_list_view_event_handler(struct rtgui_object* widget, struct rtgui_event* event)
{
struct rtgui_list_view* view = RT_NULL;
view = RTGUI_LIST_VIEW(widget);
switch (event->type)
{
case RTGUI_EVENT_PAINT:
rtgui_list_view_ondraw(view);
return RT_FALSE;
case RTGUI_EVENT_RESIZE:
{
struct rtgui_event_resize* resize;
resize = (struct rtgui_event_resize*)event;
/* recalculate page items */
view->page_items = resize->h / (2 + rtgui_theme_get_selected_height());
}
break;
case RTGUI_EVENT_MOUSE_BUTTON:
{
struct rtgui_event_mouse* emouse;
emouse = (struct rtgui_event_mouse*)event;
return rtgui_list_view_onmouse(view, emouse);
}
case RTGUI_EVENT_KBD:
{
struct rtgui_event_kbd* ekbd = (struct rtgui_event_kbd*)event;
if (ekbd->type == RTGUI_KEYDOWN)
{
rt_uint16_t old_item;
if (view->current_item == -1)
{
/* set a initial item */
if ((view->items_count > 0) &&
(ekbd->key == RTGUIK_UP || ekbd->key == RTGUIK_DOWN))
{
view->current_item = 0;
if (view->flag == RTGUI_LIST_VIEW_LIST)
rtgui_list_view_update_list(view, -1);
else
rtgui_list_view_update_icon(view, -1);
break;
}
else return RT_FALSE;
}
old_item = view->current_item;
switch (ekbd->key)
{
case RTGUIK_LEFT:
if (view->flag == RTGUI_LIST_VIEW_LIST)
{
if (view->current_item - view->page_items >= 0)
view->current_item -= view->page_items;
rtgui_list_view_update_list(view, old_item);
}
else if (view->flag == RTGUI_LIST_VIEW_ICON)
{
if (view->current_item > 0)
view->current_item --;
rtgui_list_view_update_icon(view, old_item);
}
return RT_FALSE;
case RTGUIK_UP:
if (view->flag == RTGUI_LIST_VIEW_LIST)
{
if (view->current_item > 0)
view->current_item --;
rtgui_list_view_update_list(view, old_item);
}
else if (view->flag == RTGUI_LIST_VIEW_ICON)
{
if (view->current_item >= view->col_items)
view->current_item -= view->col_items;
else
view->current_item = 0;
rtgui_list_view_update_icon(view, old_item);
}
return RT_FALSE;
case RTGUIK_RIGHT:
if (view->flag == RTGUI_LIST_VIEW_LIST)
{
if (view->current_item + view->page_items < view->items_count - 1)
view->current_item += view->page_items;
rtgui_list_view_update_list(view, old_item);
}
else if (view->flag == RTGUI_LIST_VIEW_ICON)
{
if (view->current_item < view->items_count - 1)
view->current_item ++;
rtgui_list_view_update_icon(view, old_item);
}
return RT_FALSE;
case RTGUIK_DOWN:
if (view->flag == RTGUI_LIST_VIEW_LIST)
{
if (view->current_item < view->items_count - 1)
view->current_item ++;
rtgui_list_view_update_list(view, old_item);
}
else if (view->flag == RTGUI_LIST_VIEW_ICON)
{
if (view->current_item + view->col_items <= (view->items_count - 1))
view->current_item += view->col_items;
else
view->current_item = view->items_count - 1;
rtgui_list_view_update_icon(view, old_item);
}
return RT_FALSE;
case RTGUIK_RETURN:
if (view->items[view->current_item].action != RT_NULL)
{
view->items[view->current_item].action(RTGUI_WIDGET(view),
view->items[view->current_item].parameter);
}
return RT_FALSE;
default:
break;
}
}
}
return RT_FALSE;
}
/* use view event handler */
return rtgui_container_event_handler(widget, event);
}
static void rtgui_list_view_calc(struct rtgui_list_view* view)
{
rtgui_rect_t rect;
rt_uint32_t image_width, image_height;
rt_ubase_t text_width, text_height;
rt_ubase_t item_width, item_height;
if (view->items_count == 0) return;
/* get image width and height */
if (view->items[0].image != RT_NULL)
{
image_width = view->items[0].image->w;
image_height = view->items[0].image->h;
}
else
{
image_width = 0;
image_height = 0;
}
rtgui_font_get_metrics(RTGUI_WIDGET_FONT(RTGUI_WIDGET(view)), "HHHHHH", &rect);
text_height = rtgui_rect_height(rect);
text_width = rtgui_rect_width(rect);
rtgui_widget_get_rect(RTGUI_WIDGET(view), &rect);
item_width = (image_width + LIST_MARGIN);
if (item_width < (text_width + LIST_MARGIN)) item_width = text_width + LIST_MARGIN;
item_height = image_height + 8 + text_height + LIST_MARGIN;
if (item_width > item_height) item_height = item_width;
else item_width = item_height;
view->row_items = (rtgui_rect_height(rect) - 2 * LIST_MARGIN) / item_height;
view->col_items = (rtgui_rect_width(rect) - 2 * LIST_MARGIN) / item_width;
view->page_items = view->row_items * view->col_items;
}
rtgui_list_view_t* rtgui_list_view_create(const struct rtgui_list_item* items, rt_uint16_t count,
rtgui_rect_t *rect, rt_uint16_t flag)
{
struct rtgui_list_view* view = RT_NULL;
view = (struct rtgui_list_view*) rtgui_widget_create(RTGUI_LIST_VIEW_TYPE);
if (view != RT_NULL)
{
view->items = items;
view->items_count = count;
view->flag = flag;
rtgui_widget_set_rect(RTGUI_WIDGET(view), rect);
if (flag == RTGUI_LIST_VIEW_LIST)
view->page_items = rtgui_rect_height(*rect) / (2 + rtgui_theme_get_selected_height());
else if ((flag == RTGUI_LIST_VIEW_ICON) && (count > 0))
{
rtgui_list_view_calc(view);
}
}
return view;
}
void rtgui_list_view_destroy(rtgui_list_view_t* view)
{
/* destroy view */
rtgui_widget_destroy(RTGUI_WIDGET(view));
}
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