142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
#include <rtgui/dc.h>
|
||
#include <rtgui/rtgui_system.h>
|
||
#include <rtgui/widgets/container.h>
|
||
#include "demo_view.h"
|
||
|
||
/*
|
||
* 直接在DC上绘图以实现动画效果
|
||
*
|
||
* 动画是依赖于定时器驱动的，会上下翻滚显示文字
|
||
* "飞线乱飞"
|
||
*/
|
||
static rt_int8_t dx = 1, dy = 1;
|
||
static rtgui_rect_t text_rect;
|
||
static rtgui_timer_t *timer;
|
||
|
||
void timeout(struct rtgui_timer *timer, void *parameter)
|
||
{
|
||
struct rtgui_dc *dc;
|
||
struct rtgui_rect rect;
|
||
struct rtgui_widget *widget;
|
||
|
||
/* 控件(container)通过parameter参数传递给定时器 */
|
||
widget = RTGUI_WIDGET(parameter);
|
||
|
||
/* 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） */
|
||
return ;
|
||
|
||
/* 获得demo container允许绘图的区域，主要用于判断边界 */
|
||
demo_view_get_rect(RTGUI_CONTAINER(widget), &rect);
|
||
rect.y2 -= 5;
|
||
|
||
/* 判断是否是第一次绘图 */
|
||
if ((text_rect.x1 == 0) && (text_rect.y1 == 0))
|
||
{
|
||
rtgui_rect_moveto(&text_rect, rect.x1, rect.y1);
|
||
}
|
||
else
|
||
{
|
||
/* 擦除老的文字 */
|
||
rtgui_dc_fill_rect(dc, &text_rect);
|
||
}
|
||
|
||
/* 设置dx和dy */
|
||
if (text_rect.x2 >= rect.x2) dx = -1;
|
||
if (text_rect.x1 < rect.x1) dx = 1;
|
||
if (text_rect.y2 >= rect.y2) dy = -1;
|
||
if (text_rect.y1 < rect.y1) dy = 1;
|
||
|
||
/* 移动文本框的位置 */
|
||
text_rect.x1 += dx;
|
||
text_rect.x2 += dx;
|
||
text_rect.y1 += dy;
|
||
text_rect.y2 += dy;
|
||
|
||
/* 绘图 */
|
||
rtgui_dc_draw_text(dc, "飞线乱飞", &text_rect);
|
||
|
||
/* 绘图完成 */
|
||
rtgui_dc_end_drawing(dc);
|
||
}
|
||
|
||
static rt_bool_t animation_on_show(struct rtgui_object *object, struct rtgui_event *event)
|
||
{
|
||
rt_kprintf("animation on show\n");
|
||
if (timer != RT_NULL)
|
||
rtgui_timer_start(timer);
|
||
return RT_TRUE;
|
||
}
|
||
|
||
static rt_bool_t animation_on_hide(struct rtgui_object *object, struct rtgui_event *event)
|
||
{
|
||
rt_kprintf("animation on hide\n");
|
||
if (timer != RT_NULL)
|
||
rtgui_timer_stop(timer);
|
||
return RT_TRUE;
|
||
}
|
||
|
||
rt_bool_t animation_event_handler(struct rtgui_object *object, rtgui_event_t *event)
|
||
{
|
||
struct rtgui_widget *widget = RTGUI_WIDGET(object);
|
||
|
||
if (event->type == RTGUI_EVENT_PAINT)
|
||
{
|
||
struct rtgui_dc *dc;
|
||
rtgui_rect_t rect;
|
||
|
||
/* 因为用的是demo container，上面本身有一部分控件，所以在绘图时先要让demo container先绘图 */
|
||
rtgui_container_event_handler(object, event);
|
||
|
||
/* 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） */
|
||
return RT_FALSE;
|
||
|
||
/* 获得demo container允许绘图的区域 */
|
||
demo_view_get_rect(RTGUI_CONTAINER(widget), &rect);
|
||
|
||
/* 擦除所有 */
|
||
rtgui_dc_fill_rect(dc, &rect);
|
||
|
||
/* 绘图 */
|
||
rtgui_dc_draw_text(dc, "飞线乱飞", &text_rect);
|
||
|
||
/* 绘图完成 */
|
||
rtgui_dc_end_drawing(dc);
|
||
}
|
||
else if (event->type == RTGUI_EVENT_SHOW)
|
||
{
|
||
rtgui_container_event_handler(object, event);
|
||
animation_on_show(object, event);
|
||
}
|
||
else if (event->type == RTGUI_EVENT_HIDE)
|
||
{
|
||
rtgui_container_event_handler(object, event);
|
||
animation_on_hide(object, event);
|
||
}
|
||
else
|
||
{
|
||
/* 调用默认的事件处理函数 */
|
||
return rtgui_container_event_handler(object, event);
|
||
}
|
||
|
||
return RT_FALSE;
|
||
}
|
||
|
||
rtgui_container_t *demo_view_animation()
|
||
{
|
||
rtgui_container_t *container;
|
||
|
||
container = demo_view("DC 动画");
|
||
if (container != RT_NULL)
|
||
rtgui_object_set_event_handler(RTGUI_OBJECT(container), animation_event_handler);
|
||
|
||
rtgui_font_get_metrics(RTGUI_WIDGET_FONT(container), "飞线乱飞", &text_rect);
|
||
rtgui_rect_moveto(&text_rect, 0, 45);
|
||
timer = rtgui_timer_create(2, RT_TIMER_FLAG_PERIODIC, timeout, (void *)container);
|
||
|
||
return container;
|
||
}
|