rt-thread-official/examples/gui/demo_view_listbox.c

/*
 * 程序清单：label控件演示
 *
 * 这个例子会在创建出的container上添加几个不同类型的label控件
 */
#include "demo_view.h"
#include <rtgui/widgets/label.h>
#include <rtgui/widgets/listbox.h>

static rtgui_image_t *item_icon = RT_NULL;
static const char *image_xpm[] =
{
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    "                                ",
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    "_ : < { [ } | 1 - ; > > / 2 ( 3 ",
    "{ 4 5 1 6 7 5 8 9 0 a / , b c d ",
    "e f g h 8 8 g h i j / k l c m d ",
    "  n o   p q r s t 2 , l c u v w ",
    "        x y z A B , l u C v D E ",
    "        @ F > t k G H I J K L M ",
    "      N @ O / 2 l P Q R S T U V ",
    "      W m 2 X l I Y Z `  ...+.  ",
    "      W @.l u I R #.Z Y U M     ",
    "    $.G I $.%.R &.Y *.& =.      ",
    "  -.;.>.,.L L ,.& M             ",
    "                                "
};

static struct rtgui_listbox_item items[] =
{
    {"list #0", RT_NULL},
    {"list #1", RT_NULL},
    {"list #2", RT_NULL},
    {"list #3", RT_NULL},
};

static rt_bool_t on_items(struct rtgui_object *object, struct rtgui_event *event)
{
    rtgui_listbox_t *box;
    /* get listbox */
    box = RTGUI_LISTBOX(object);

    /* 打印当前的项 */
    rt_kprintf("current item: %d\n", box->current_item);

    return RT_TRUE;
}

/* 创建用于演示label控件的视图 */
rtgui_container_t *demo_view_listbox(void)
{
    rtgui_rect_t rect;
    rtgui_container_t *container;
    rtgui_label_t *label;
    rtgui_listbox_t *box;

    /* 先创建一个演示用的视图 */
    container = demo_view("ListBox Demo");

    if (item_icon == RT_NULL)
        item_icon = rtgui_image_create_from_mem("xpm",
                                                (const rt_uint8_t *)image_xpm, sizeof(image_xpm), RT_TRUE);
    items[1].image = item_icon;

    /* 获得视图的位置信息 */
    demo_view_get_rect(container, &rect);
    rect.x1 += 5;
    rect.x2 -= 5;
    rect.y1 += 5;
    rect.y2 = rect.y1 + 20;
    /* 创建一个label控件 */
    label = rtgui_label_create("listbox: ");
    /* 设置label的位置 */
    rtgui_widget_set_rect(RTGUI_WIDGET(label), &rect);
    /* container是一个container控件，调用add_child方法添加这个label控件 */
    rtgui_container_add_child(container, RTGUI_WIDGET(label));

    rect.y1 = rect.y2 + 3;
    rect.y2 = 250;
    box = rtgui_listbox_create(items, sizeof(items) / sizeof(struct rtgui_listbox_item), &rect);
    rtgui_listbox_set_onitem(box, on_items);
    /* container是一个container控件，调用add_child方法添加这个listbox控件 */
    rtgui_container_add_child(container, RTGUI_WIDGET(box));

    return container;
}