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