add listbox example.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@698 bbd45198-f89e-11dd-88c7-29a3b14d5316

examples/gui/SConscript

@@ -17,6 +17,7 @@ demo_view_label.c
 demo_view_mywidget.c
 demo_view_progressbar.c
 demo_view_radiobox.c
+demo_view_listbox.c
 demo_view_slider.c
 demo_view_textbox.c
 demo_view_window.c

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>
+
+const 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");
+
+	/* 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;
+}

examples/gui/demo_workbench.c

@@ -62,6 +62,7 @@ static void workbench_entry(void* parameter)
 	demo_view_progressbar(workbench);
 	demo_view_radiobox(workbench);
 	demo_view_textbox(workbench);
+	demo_view_listbox(workbench);
 	demo_view_slider(workbench);
 	demo_view_mywidget(workbench);
 	demo_view_image(workbench);