add example directory.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@279 bbd45198-f89e-11dd-88c7-29a3b14d5316

examples/gui/demo_panel.c

+#include <rtgui/rtgui.h>
+#include <rtgui/rtgui_server.h>
+
+void panel_init(void)
+{
+    rtgui_rect_t rect;
+
+    /* register dock panel */
+    rect.x1 = 0;
+    rect.y1 = 0;
+    rect.x2 = 240;
+    rect.y2 = 25;
+    rtgui_panel_register("info", &rect);
+
+    /* register main panel */
+    rect.x1 = 0;
+    rect.y1 = 25;
+    rect.x2 = 320;
+    rect.y2 = 320;
+    rtgui_panel_register("main", &rect);
+    rtgui_panel_set_default_focused("main");
+}

examples/gui/demo_workbench.c

+#include <rtgui/rtgui.h>
+#include <rtgui/rtgui_system.h>
+
+#include <rtgui/widgets/view.h>
+#include <rtgui/widgets/workbench.h>
+
+static rt_bool_t view_event_handler(struct rtgui_widget* widget, struct rtgui_event* event)
+{
+	/* 我们目前只对绘制事件感兴趣 */
+	if (event->type == RTGUI_EVENT_PAINT)
+	{
+		struct rtgui_dc* dc;
+		struct rtgui_rect rect;
+
+		/* 获得一个设备上下文 */
+		dc = rtgui_dc_begin_drawing(widget);
+		if (dc == RT_NULL) return RT_FALSE; /* 如果获取失败代表什么？这个控件是隐藏的或... */
+		rtgui_widget_get_rect(widget, &rect); /* 获得控件的可视区域 */
+
+		/* 先对所在可视区域全部填充为背景色 */
+		rtgui_dc_fill_rect(dc, &rect);
+
+		/* 绘制一个hello! */
+		rtgui_dc_draw_text(dc, "hello world", &rect);
+
+		/* 通知RTGUI，绘制结束 */
+		rtgui_dc_end_drawing(dc);
+
+		return RT_FALSE;
+	}
+
+	/* 如果不是绘制事件，使用view原来的事件处理函数处理 */
+	return rtgui_view_event_handler(widget, event);
+}
+
+static void workbench_entry(void* parameter)
+{
+	rt_mq_t mq;
+	struct rtgui_view* view;
+	struct rtgui_workbench* workbench;
+
+	/* 创建GUI应用需要的消息队列 */
+	mq = rt_mq_create("workbench", 256, 4, RT_IPC_FLAG_FIFO);
+	/* 注册当前线程为GUI线程 */
+	rtgui_thread_register(rt_thread_self(), mq);
+
+	/* 创建一个工作台 */
+	workbench = rtgui_workbench_create("main", "workbench");
+	if (workbench == RT_NULL) return;
+
+	/* 创建一个工作台上的一个视图 */
+	view = rtgui_view_create("view");
+	rtgui_widget_set_event_handler(RTGUI_WIDGET(view), view_event_handler);
+
+	/* 在工作台上添加一个视图 */
+	rtgui_workbench_add_view(workbench, view);
+
+	/* 显示这个视图 */
+	rtgui_view_show(view);
+
+	/* 执行工作台事件循环 */
+	rtgui_workbench_event_loop(workbench);
+
+	/* 去注册GUI线程 */
+	rtgui_thread_deregister(rt_thread_self());
+	rt_mq_delete(mq);
+}
+
+void workbench_init()
+{
+	static rt_bool_t inited = RT_FALSE;
+
+	if (inited == RT_FALSE) /* 避免重复初始化而做的保护 */
+	{
+		rt_thread_t tid;
+
+		tid = rt_thread_create("wb",
+			workbench_entry, RT_NULL,
+			2048, 25, 10);
+
+		if (tid != RT_NULL) rt_thread_startup(tid);
+
+		inited = RT_TRUE;
+	}
+}
+
+#ifdef RT_USING_RTGUI
+#include <finsh.h>
+void workbench()
+{
+	workbench_init();
+}
+/* finsh的命令输出，可以直接执行workbench()函数以执行上面的函数 */
+FINSH_FUNCTION_EXPORT(workbench, workbench demo)
+#endif