rt-thread-official/examples/gui/demo_view_dc.c

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/*
* 程序清单DC操作演示
*
* 这个例子会在创建出的view上进行DC操作的演示
*/
#include "demo_view.h"
#include <rtgui/dc.h>
#include <rtgui/rtgui_system.h>
#include <rtgui/widgets/label.h>
#include <rtgui/widgets/slider.h>
#include <rtgui/image_hdc.h>
#include "play.hdh"
#include "stop.hdh"
struct rtgui_image_hdcmm play_image = RTGUI_IMAGE_HDC_DEF(2, 0x1c, 0x16, play_hdh);
struct rtgui_image_hdcmm stop_image = RTGUI_IMAGE_HDC_DEF(2, 0x1c, 0x16, stop_hdh);
/*
* view的事件处理函数
*/
rt_bool_t dc_event_handler(struct rtgui_object* object, rtgui_event_t *event)
{
struct rtgui_widget *widget = RTGUI_WIDGET(object);
/* 仅对PAINT事件进行处理 */
if (event->type == RTGUI_EVENT_PAINT)
{
struct rtgui_dc* dc;
rtgui_rect_t rect;
const int vx[] = {20, 50, 60, 45, 60, 20};
const int vy[] = {150, 50, 90, 60, 45, 50};
/*
* 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_container_event_handler(RTGUI_OBJECT(widget), event);
/************************************************************************/
/* 下面的是DC的操作 */
/************************************************************************/
/* 获得控件所属的DC */
dc = rtgui_dc_begin_drawing(widget);
/* 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)
return RT_FALSE;
/* 获得demo view允许绘图的区域 */
demo_view_get_logic_rect(RTGUI_CONTAINER(widget), &rect);
RTGUI_DC_TEXTALIGN(dc) = RTGUI_ALIGN_BOTTOM | RTGUI_ALIGN_CENTER_HORIZONTAL;
/* 显示GUI的版本信息 */
#ifdef RTGUI_USING_SMALL_SIZE
rtgui_dc_draw_text(dc, "RT-Thread/GUI小型版本", &rect);
#else
rtgui_dc_draw_text(dc, "RT-Thread/GUI标准版本", &rect);
#endif
{
rtgui_rect_t rect = {0, 0, 0x1c, 0x16};
rtgui_rect_moveto(&rect, 80, 80);
rtgui_image_blit((rtgui_image_t*)&play_image, dc, &rect);
rect.x1 = 0; rect.y1 = 0;
rect.x2 = 0x1c; rect.y2 = 0x16;
rtgui_rect_moveto(&rect, 130, 80);
rtgui_image_blit((rtgui_image_t*)&stop_image, dc, &rect);
}
/* 绘制一个圆形 */
RTGUI_DC_FC(dc) = red;
rtgui_dc_draw_circle(dc, rect.x1 + 10, rect.y1 + 10, 10);
/* 填充一个圆形 */
RTGUI_DC_FC(dc) = green;
rtgui_dc_fill_circle(dc, rect.x1 + 30, rect.y1 + 10, 10);
#if 0
/* 画一个圆角矩形 */
rect.x1 = 150;
rect.y1 = 180;
rect.x2 = 210;
rect.y2 = 260;
RTGUI_DC_FC(dc) = RTGUI_RGB(25, 70, 150);
rtgui_dc_draw_round_rect(dc, &rect, 10);
rect.x1 = 160;
rect.y1 = 190;
rect.x2 = 200;
rect.y2 = 250;
RTGUI_DC_FC(dc) = RTGUI_RGB(170, 7, 80);
rtgui_dc_fill_round_rect(dc, &rect, 7);
/* 画一个圆弧 */
RTGUI_DC_FC(dc) = RTGUI_RGB(250, 120, 120);
rtgui_dc_draw_arc(dc, rect.x1 + 120, rect.y1 + 60, 30, 0, 120);
/* 画一个扇形圆环 */
RTGUI_DC_FC(dc) = RTGUI_RGB(150, 23, 100);
rtgui_dc_draw_annulus(dc, 180, 170, 30, 50, 210, 330);
/* 多边形 */
RTGUI_DC_FC(dc) = blue;
rtgui_dc_draw_polygon(dc, vx, vy, 6);
#endif
RTGUI_DC_FC(dc) = blue;
/* 绘制不同的边框 */
{
rtgui_rect_t rect = {0, 0, 16, 16};
rtgui_rect_moveto(&rect, 30, 120);
rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_RAISE);
rect.x1 += 20;
rect.x2 += 20 + 50;
rtgui_dc_draw_text(dc, "raise", &rect);
rect.x1 -= 20;
rect.x2 -= 20 + 50;
rect.y1 += 20;
rect.y2 += 20;
rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_SIMPLE);
rect.x1 += 20;
rect.x2 += 20 + 50;
rtgui_dc_draw_text(dc, "simple", &rect);
rect.x1 -= 20;
rect.x2 -= 20 + 50;
rect.y1 += 20;
rect.y2 += 20;
rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_SUNKEN);
rect.x1 += 20;
rect.x2 += 20 + 50;
rtgui_dc_draw_text(dc, "sunken", &rect);
rect.x1 -= 20;
rect.x2 -= 20 + 50;
rect.y1 += 20;
rect.y2 += 20;
rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_BOX);
rect.x1 += 20;
rect.x2 += 20 + 50;
rtgui_dc_draw_text(dc, "box", &rect);
rect.x1 -= 20;
rect.x2 -= 20 + 50;
rect.y1 += 20;
rect.y2 += 20;
rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_STATIC);
rect.x1 += 20;
rect.x2 += 20 + 50;
rtgui_dc_draw_text(dc, "static", &rect);
rect.x1 -= 20;
rect.x2 -= 20 + 50;
rect.y1 += 20;
rect.y2 += 20;
rtgui_dc_draw_border(dc, &rect, RTGUI_BORDER_EXTRA);
rect.x1 += 20;
rect.x2 += 20 + 50;
rtgui_dc_draw_text(dc, "extera", &rect);
rect.x1 -= 20;
rect.x2 -= 20 + 50;
rect.y1 += 20;
rect.y2 += 20;
}
/* 绘图完成 */
rtgui_dc_end_drawing(dc);
}
else
{
/* 其他事件,调用默认的事件处理函数 */
return rtgui_container_event_handler(object, event);
}
return RT_FALSE;
}
/* 创建用于DC操作演示用的视图 */
rtgui_container_t *demo_view_dc(void)
{
rtgui_container_t *view;
view = demo_view("DC Demo");
if (view != RT_NULL)
/* 设置成自己的事件处理函数 */
rtgui_object_set_event_handler(RTGUI_OBJECT(view), dc_event_handler);
return view;
}