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

#include <rtgui/dc.h>
#include <rtgui/rtgui_system.h>
#include <rtgui/widgets/container.h>
#include "demo_view.h"

/*
 * ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>DC<EFBFBD>ϻ<EFBFBD>ͼ<EFBFBD><EFBFBD>ʵ<EFBFBD>ֶ<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD>
 *
 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
 * "<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҷ<EFBFBD>"
 */
static rt_int8_t dx = 1, dy = 1;
static rtgui_rect_t text_rect;
static rtgui_timer_t *timer;
static struct rtgui_dc *dc_buffer;
static void timeout(struct rtgui_timer *timer, void *parameter)
{
    struct rtgui_dc *dc;
    rtgui_rect_t rect;
    rtgui_widget_t *widget;

    /* <20>ؼ<EFBFBD>(view)ͨ<><CDA8>parameter<65><72><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݸ<EFBFBD><DDB8><EFBFBD>ʱ<EFBFBD><CAB1> */
    widget = (rtgui_widget_t *)parameter;

    /* <20><><EFBFBD>ÿؼ<C3BF><D8BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DC */
    dc = rtgui_dc_begin_drawing(widget);
    if (dc == RT_NULL) /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DC<44><43><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><D8A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؼ<EFBFBD><D8BC>򸸿ؼ<F2B8B8BF><D8BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬<D7B4><CCAC>DC<44>ǻ<EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD>ɹ<EFBFBD><C9B9>ģ<EFBFBD> */
        return ;

    /* <20><><EFBFBD><EFBFBD>demo view<65><77><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD>жϱ߽<CFB1> */
    demo_view_get_logic_rect(RTGUI_CONTAINER(widget), &rect);
    rect.y2 -= 5;

    /* <20>ж<EFBFBD><D0B6>Ƿ<EFBFBD><C7B7>ǵ<EFBFBD>һ<EFBFBD>λ<EFBFBD>ͼ */
    if ((text_rect.x1 == 0) && (text_rect.y1 == 0))
    {
        rtgui_rect_moveto(&text_rect, rect.x1, rect.y1);
    }

    /* <20><><EFBFBD><EFBFBD>dx<64><78>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;

    /* <20>ƶ<EFBFBD><C6B6>ı<EFBFBD><C4B1><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><CEBB> */
    text_rect.x1 += dx;
    text_rect.x2 += dx;
    text_rect.y1 += dy;
    text_rect.y2 += dy;

    /* <20><>ͼ */
    rect = text_rect;
    rect.x2 += 2;
    rect.y2 += 2;
    rtgui_dc_blit(dc_buffer, NULL, dc, &rect);

    /* <20><>ͼ<EFBFBD><CDBC><EFBFBD><EFBFBD> */
    rtgui_dc_end_drawing(dc);
}

static rt_bool_t animation_on_show(struct rtgui_object *object, struct rtgui_event *event)
{
    rt_kprintf("buffer animation on show\n");
    rtgui_timer_start(timer);

    return RT_TRUE;
}

static rt_bool_t animation_on_hide(struct rtgui_object *object, struct rtgui_event *event)
{
    rt_kprintf("buffer animation on hide\n");
    rtgui_timer_stop(timer);

    return RT_TRUE;
}

static 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;

        /* <20><>Ϊ<EFBFBD>õ<EFBFBD><C3B5><EFBFBD>demo view<65><77><EFBFBD><EFBFBD><EFBFBD>汾<EFBFBD><E6B1BE><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ֿؼ<D6BF><D8BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD>ͼʱ<CDBC><CAB1>Ҫ<EFBFBD><D2AA>demo view<65>Ȼ<EFBFBD>ͼ */
        rtgui_container_event_handler(object, event);

        /* <20><><EFBFBD>ÿؼ<C3BF><D8BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DC */
        dc = rtgui_dc_begin_drawing(widget);
        if (dc == RT_NULL) /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>DC<44><43><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><D8A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؼ<EFBFBD><D8BC>򸸿ؼ<F2B8B8BF><D8BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬<D7B4><CCAC>DC<44>ǻ<EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD>ɹ<EFBFBD><C9B9>ģ<EFBFBD> */
            return RT_FALSE;

        /* <20><><EFBFBD><EFBFBD>demo view<65><77><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
        demo_view_get_logic_rect(RTGUI_CONTAINER(widget), &rect);

        /* <20><>ͼ */
        rect = text_rect;
        rtgui_rect_inflate(&rect, +1);
        rtgui_dc_blit(dc_buffer, NULL, dc, &rect);

        /* <20><>ͼ<EFBFBD><CDBC><EFBFBD><EFBFBD> */
        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
    {
        /* <20><><EFBFBD><EFBFBD>Ĭ<EFBFBD>ϵ<EFBFBD><CFB5>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
        return rtgui_container_event_handler(object, event);
    }

    return RT_FALSE;
}

struct rtgui_container *demo_view_buffer_animation(void)
{
    struct rtgui_container *container;

    container = demo_view("DC <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>");
    if (container != RT_NULL)
        rtgui_object_set_event_handler(RTGUI_OBJECT(container), animation_event_handler);

    rtgui_font_get_metrics(RTGUI_WIDGET_FONT(container), "<EFBFBD><EFBFBD><EFBFBD>嶯<EFBFBD><EFBFBD>", &text_rect);
    if (dc_buffer == RT_NULL)
    {
        rtgui_rect_t rect;

        rect.x1 = 0;
        rect.x2 = rtgui_rect_width(text_rect) + 2;
        rect.y1 = 0;
        rect.y2 = rtgui_rect_height(text_rect) + 2;

        /* <20><><EFBFBD><EFBFBD> DC Buffer<65><72><EFBFBD><EFBFBD> 50<35><30><EFBFBD><EFBFBD> 50 */
        dc_buffer = rtgui_dc_buffer_create(rtgui_rect_width(rect), rtgui_rect_height(rect));
        RTGUI_DC_FC(dc_buffer) = RTGUI_WIDGET_BACKGROUND(container);
        rtgui_dc_fill_rect(dc_buffer, &rect);
        RTGUI_DC_FC(dc_buffer) = black;
        rect.x1 = 1;
        rect.y1 = 1;
        rtgui_dc_draw_text(dc_buffer, "<EFBFBD><EFBFBD><EFBFBD>嶯<EFBFBD><EFBFBD>", &rect);
    }

    /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD>Դ<EFBFBD><D4B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
    timer = rtgui_timer_create(1, RT_TIMER_FLAG_PERIODIC, timeout, (void *)container);

    return container;
}