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view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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	"y 	c #204880",
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	"A 	c #90A8C0",
	"B 	c #FFF080",
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	"P 	c #A09830",
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	"S 	c #807830",
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	"U 	c #605820",
	"V 	c #6F672F",
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	"X 	c #F0E880",
	"Y 	c #907820",
	"Z 	c #B09820",
	"` 	c #B09010",
	" .	c #B08820",
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	"+.	c #5F5F1F",
	"@.	c #F0E080",
	"#.	c #B09020",
	"$.	c #C0B040",
	"%.	c #A09030",
	"&.	c #908020",
	"*.	c #606020",
	"=.	c #6F5F1F",
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	">.	c #6F681F",
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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 void on_items(rtgui_widget_t* widget, struct rtgui_event* event)
{
	rtgui_listbox_t* box;
	/* get listbox */
	box = RTGUI_LISTBOX(widget);

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

/* 创建用于演示label控件的视图 */
rtgui_view_t* demo_view_listbox(rtgui_workbench_t* workbench)
{
	rtgui_rect_t rect;
	rtgui_view_t* view;
	rtgui_label_t* label;
	rtgui_listbox_t* box;

	/* 先创建一个演示用的视图 */
	view = demo_view(workbench, "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(view, &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);
	/* view是一个container控件，调用add_child方法添加这个label控件 */
	rtgui_container_add_child(RTGUI_CONTAINER(view), 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);
	/* view是一个container控件，调用add_child方法添加这个listbox控件 */
	rtgui_container_add_child(RTGUI_CONTAINER(view), RTGUI_WIDGET(box));

	return view;
}