db06460208
The full log is at https://github.com/RTGUI/RTGUI/commits/merge_1 and it's difficult to merge the new tree commit by commit. I also converted all the file into unix eol so there are many fake diff. Big changes are noted in rtgui/doc/road_map.txt and rtgui/doc/attention.txt. Keep an eye on them if you want to migrate your old code. Note that the work is still in progress and the bsp is not prepared in trunk so far. git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2092 bbd45198-f89e-11dd-88c7-29a3b14d5316
85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
/*
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* 程序清单：DC Buffer演示
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*
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* 这个例子会在创建出的view上进行DC Buffer的演示
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*/
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#include "demo_view.h"
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#include <rtgui/rtgui_system.h>
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#include <rtgui/widgets/label.h>
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#include <rtgui/widgets/slider.h>
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#include <rtgui/image.h>
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static rtgui_image_t *background;
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static struct rtgui_dc *dc_buffer;
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/*
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* view的事件处理函数
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*/
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static rt_bool_t dc_buffer_event_handler(struct rtgui_object* object, rtgui_event_t *event)
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{
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struct rtgui_widget *widget = RTGUI_WIDGET(object);
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/* 仅对PAINT事件进行处理 */
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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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/*
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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
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* 先绘图
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*/
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rtgui_container_event_handler(object, 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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/* 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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if (dc == RT_NULL)
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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_logic_rect(RTGUI_CONTAINER(widget), &rect);
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rect.x1 += 10;
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rect.y1 += 10;
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rtgui_dc_blit(dc_buffer, NULL, dc, &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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/* 其他事件，调用默认的事件处理函数 */
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return rtgui_container_event_handler(object, event);
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}
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return RT_FALSE;
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}
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/* 创建用于DC Buffer操作演示用的视图 */
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rtgui_container_t *demo_view_dc_buffer()
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{
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rtgui_container_t *view;
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if (dc_buffer == RT_NULL)
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{
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rtgui_rect_t rect = {0, 0, 50, 50};
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/* 创建 DC Buffer，长 50，宽 50 */
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dc_buffer = rtgui_dc_buffer_create(50, 50);
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RTGUI_DC_FC(dc_buffer) = blue;
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rtgui_dc_fill_rect(dc_buffer, &rect);
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RTGUI_DC_FC(dc_buffer) = red;
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rtgui_dc_draw_circle(dc_buffer, 25, 25, 10);
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}
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view = demo_view("缓冲DC演示");
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if (view != RT_NULL)
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/* 设置成自己的事件处理函数 */
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rtgui_object_set_event_handler(RTGUI_OBJECT(view), dc_buffer_event_handler);
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return view;
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}
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