151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/*
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* 程序清单：DC操作演示
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*
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* 这个例子会在创建出的view上进行DC操作的演示
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*/
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#include "demo_view.h"
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#include <rtgui/dc.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_hdc.h>
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#include <math.h>
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/*
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* view的事件处理函数
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*/
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rt_bool_t instrument_panel_event_handler(rtgui_widget_t* widget, rtgui_event_t *event)
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{
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char ac[4];
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int i;
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int x0 = 120;
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int y0 = 170;
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int x, y;
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int default_color;
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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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const int vx[] = {85, 85, 105, 105};
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const int vy[] = {60, 100, 100, 60};
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const int arrowx[] = {120+75, 120+75, 120+85};
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const int arrowy[] = {170-5, 170+5, 170};
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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_view_event_handler(widget, event);
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/************************************************************************/
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/* 下面的是DC的操作 */
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/************************************************************************/
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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_rect(RTGUI_VIEW(widget), &rect);
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RTGUI_DC_TEXTALIGN(dc) = RTGUI_ALIGN_BOTTOM | RTGUI_ALIGN_CENTER_HORIZONTAL;
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/* 显示GUI的版本信息 */
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#ifdef RTGUI_USING_SMALL_SIZE
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rtgui_dc_draw_text(dc, "RT-Thread/GUI小型版本", &rect);
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#else
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rtgui_dc_draw_text(dc, "RT-Thread/GUI标准版本", &rect);
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#endif
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RTGUI_DC_TEXTALIGN(dc) = RTGUI_ALIGN_CENTER_VERTICAL | RTGUI_ALIGN_CENTER_HORIZONTAL;
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RTGUI_DC_FC(dc) = blue;
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rect.y2 = 270;
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rtgui_dc_draw_text(dc, "rtgui-panel", &rect);
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for(i = 0; i < 6; i++)
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{
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rtgui_dc_draw_arc(dc, x0, y0, 117-i, 150, 30);
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}
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RTGUI_DC_FC(dc) = black;
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RTGUI_DC_TEXTALIGN(dc) = RTGUI_ALIGN_LEFT;
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for(i = 0; i <= 23; i++)
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{
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if(i < 12)
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{
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x = x0 + 105 * cos((150 + i * 10) * 3.1415926 / 180);
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y = y0 + 105 * sin((150 + i * 10) * 3.1415926 / 180);
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rect.x1 = x;
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rect.y1 = y;
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rect.x2 = rect.x1 + 12 * 3;
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rect.y2 = rect.y1 + 12;
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rt_sprintf(ac, "%d", 10 * i);
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rtgui_dc_draw_text(dc, ac, &rect);
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}
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else
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{
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RTGUI_DC_TEXTALIGN(dc) = RTGUI_ALIGN_RIGHT;
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x = x0 + 105 * cos((160 + i * 10) * 3.1415926 / 180);
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y = y0 + 105 * sin((160 + i * 10) * 3.1415926 / 180);
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rect.x1 = x - 12 * 3;
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rect.y1 = y;
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rect.x2 = rect.x1 + 12 * 3;
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rect.y2 = rect.y1 + 12;
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rt_sprintf(ac, "%d", 10 * i);
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rtgui_dc_draw_text(dc, ac, &rect);
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}
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x = x0 + 107 * cos((150 + i * 10) * 3.1415926 / 180);
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y = y0 + 107 * sin((150 + i * 10) * 3.1415926 / 180);
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rtgui_dc_fill_circle(dc, x, y, 3);
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}
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RTGUI_DC_FC(dc) = RTGUI_RGB(166, 0, 166);
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rtgui_dc_fill_circle(dc, x0, y0, 3);
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RTGUI_DC_FC(dc) = RTGUI_RGB(120, 141, 30);
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rtgui_dc_draw_circle(dc, x0, y0, 5);
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default_color = RTGUI_DC_BC(dc);
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RTGUI_DC_BC(dc) = red;
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rect.x1 = x0 + 7;
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rect.y1 = y0 - 1;
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rect.x2 = x0 + 75;
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rect.y2 = y0 + 1;
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rtgui_dc_fill_rect(dc, &rect);
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RTGUI_DC_BC(dc) = default_color;
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rtgui_dc_fill_polygon(dc, arrowx, arrowy, 3);
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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_view_event_handler(widget, 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操作演示用的视图 */
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rtgui_view_t *demo_view_instrument_panel(rtgui_workbench_t* workbench)
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{
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rtgui_view_t *view;
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view = demo_view(workbench, "instrument panel Demo");
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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_widget_set_event_handler(RTGUI_WIDGET(view), instrument_panel_event_handler);
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return view;
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}
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