52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
#include <rtgui/dc.h>
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#include <rtgui/rtgui_system.h>
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#include <rtgui/widgets/view.h>
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#include "demo_view.h"
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rt_bool_t benchmark_event_handler(rtgui_widget_t* widget, rtgui_event_t *event)
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{
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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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rtgui_rect_t rect;
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/* 因为用的是demo view，上面本身有一部分控件，所以在绘图时先要让demo view先绘图 */
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rtgui_view_event_handler(widget, event);
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/* 获得控件所属的DC */
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dc = rtgui_dc_begin_drawing(widget);
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if (dc == RT_NULL) /* 如果不能正常获得DC，返回（如果控件或父控件是隐藏状态，DC是获取不成功的） */
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return RT_FALSE;
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/* 获得demo view允许绘图的区域 */
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demo_view_get_rect(RTGUI_VIEW(widget), &rect);
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/* 擦除所有 */
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rtgui_dc_fill_rect(dc, &rect);
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/* 绘图 */
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rtgui_dc_draw_text(dc, "飞线乱飞", &text_rect);
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/* 绘图完成 */
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rtgui_dc_end_drawing(dc);
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}
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else
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{
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/* 调用默认的事件处理函数 */
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return rtgui_view_event_handler(widget, event);
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}
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return RT_FALSE;
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}
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rtgui_view_t *demo_view_benchmark(rtgui_workbench_t* workbench)
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{
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rtgui_view_t *view;
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view = demo_view(workbench, "绘图测试");
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if (view != RT_NULL)
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rtgui_widget_set_event_handler(RTGUI_WIDGET(view), benchmark_event_handler);
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return view;
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}
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