add benchmark example.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@855 bbd45198-f89e-11dd-88c7-29a3b14d5316

examples/gui/demo_view_benchmark.c

 #include <rtgui/dc.h>
+#include <rtgui/dc_hw.h>
 #include <rtgui/rtgui_system.h>
 #include <rtgui/widgets/view.h>
 #include "demo_view.h"
 
-#define RAND(x1, x2) (rand() % ((x2 - x1) + x1))
+#define RAND(x1, x2) ((rand() % (x2 - x1)) + x1)
 
+static rtgui_view_t* view = RT_NULL;
 void _onidle(rtgui_widget_t* widget, rtgui_event_t *event)
 {
 	rtgui_color_t color;
 	rtgui_rect_t rect, draw_rect;
+	struct rtgui_dc *dc;
 
-	/* 获得控件所属的DC */
-	dc = rtgui_dc_begin_drawing(widget);
+	/* 获得控件所属的DC */
+	// dc = rtgui_dc_hw_create(RTGUI_WIDGET(view)); 
+	dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(view));
 	if (dc == RT_NULL) return ;
 
-	demo_view_get_rect(RTGUI_VIEW(widget), &rect);
+	demo_view_get_rect(RTGUI_VIEW(view), &rect);
 	draw_rect.x1 = RAND(rect.x1, rect.x2);
 	draw_rect.y1 = RAND(rect.y1, rect.y2);
 	draw_rect.x2 = RAND(draw_rect.x1, rect.x2);
 	draw_rect.y2 = RAND(draw_rect.y1, rect.y2);
 
-	RTGUI_RGB_R(color) = rand() % 255;
-	RTGUI_RGB_G(color) = rand() % 255;
-	RTGUI_RGB_B(color) = rand() % 255;
+	color = RTGUI_RGB(rand() % 255, rand() % 255, rand() % 255);
+	RTGUI_WIDGET_BACKGROUND(RTGUI_WIDGET(view)) = color;
 
-	rtgui_dc_fill_rect(dc, &rect);
+	rtgui_dc_fill_rect(dc, &draw_rect);
 
-	/* 绘图完成 */
+	/* 绘图完成 */
 	rtgui_dc_end_drawing(dc);
 }
 
@@ -37,26 +40,26 @@ rt_bool_t benchmark_event_handler(rtgui_widget_t* widget, rtgui_event_t *event)
 		struct rtgui_dc* dc;
 		rtgui_rect_t rect;
 
-		/* 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 */
+		/* 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 */
 		rtgui_view_event_handler(widget, event);
 
-		/* 获得控件所属的DC */
+		/* 获得控件所属的DC */
 		dc = rtgui_dc_begin_drawing(widget);
-		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） */
+		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） */
 			return RT_FALSE;
 
-		/* 获得demo view允许绘图的区域 */
+		/* 获得demo view允许绘图的区域 */
 		demo_view_get_rect(RTGUI_VIEW(widget), &rect);
 
-		/* 擦除所有 */
+		/* 擦除所有 */
 		rtgui_dc_fill_rect(dc, &rect);
 
-		/* 绘图完成 */
+		/* 绘图完成 */
 		rtgui_dc_end_drawing(dc);
 	}
 	else
 	{
-		/* 调用默认的事件处理函数 */
+		/* 调用默认的事件处理函数 */
 		return rtgui_view_event_handler(widget, event);
 	}
 
@@ -65,12 +68,11 @@ rt_bool_t benchmark_event_handler(rtgui_widget_t* widget, rtgui_event_t *event)
 
 rtgui_view_t *demo_view_benchmark(rtgui_workbench_t* workbench)
 {
-	rtgui_view_t *view;
+	// rtgui_view_t *view;
 
 	srand(100);
-	view = demo_view(workbench, "绘图测试");
-	if (view != RT_NULL)
-		rtgui_widget_set_event_handler(RTGUI_WIDGET(view), benchmark_event_handler);
+	view = demo_view(workbench, "绘图测试");
+	rtgui_widget_set_event_handler(RTGUI_WIDGET(view), benchmark_event_handler);
 
 	rtgui_thread_set_onidle(_onidle);