请教：RTGUI怎么实现滑动效果？？？

发布于 2013-03-24 20:41:41 浏览：2512 订阅该版

我想实现触屏滑动解锁功能 但是在驱动里面有个触摸松手检查我去掉之后鼠标功能就不正常了 请问下面这段代码怎么改

```
void touch_timeout(void* parameter)
{
    static unsigned int touched_down = 0;
    struct rtgui_event_mouse emouse;
    static struct _touch_previous
    {
        rt_uint32_t x;
        rt_uint32_t y;
    } touch_previous;

/* touch time is too short and we lost the position already. */
    if ((!touched_down) && GPIO_ReadInputDataBit(GPIOG, GPIO_Pin_7) != 0)
        return;

if (GPIO_ReadInputDataBit(GPIOG,GPIO_Pin_7) != 0)
    {
        int tmer = RT_TICK_PER_SECOND/8 ;
        EXTI_Enable(1);
        emouse.parent.type = RTGUI_EVENT_MOUSE_BUTTON;
        emouse.button = (RTGUI_MOUSE_BUTTON_LEFT |RTGUI_MOUSE_BUTTON_UP);

/* use old value */
        emouse.x = touch->x;
        emouse.y = touch->y;

/* stop timer */
        rt_timer_stop(touch->poll_timer);
        rt_kprintf("touch up: (%d, %d)
", emouse.x, emouse.y);
        touched_down = 0;

if ((touch->calibrating == RT_TRUE) && (touch->calibration_func != RT_NULL))
        {
            /* callback function */
            touch->calibration_func(emouse.x, emouse.y);
        }
        rt_timer_control(touch->poll_timer , RT_TIMER_CTRL_SET_TIME , &tmer);
    }
    else
    {
        if(touched_down == 0)
        {
            int tmer = RT_TICK_PER_SECOND/20 ;
            /* calculation */
            rtgui_touch_calculate();

/* send mouse event */
            emouse.parent.type = RTGUI_EVENT_MOUSE_BUTTON;
            emouse.parent.sender = RT_NULL;

emouse.x = touch->x;
            emouse.y = touch->y;

touch_previous.x = touch->x;
            touch_previous.y = touch->y;

/* init mouse button */
            emouse.button = (RTGUI_MOUSE_BUTTON_LEFT |RTGUI_MOUSE_BUTTON_DOWN);

//            rt_kprintf("touch down: (%d, %d)
", emouse.x, emouse.y);
            touched_down = 1;
            rt_timer_control(touch->poll_timer , RT_TIMER_CTRL_SET_TIME , &tmer);
        }
        else
        {
            /* calculation */
            rtgui_touch_calculate();

#define previous_keep      8
            //判断移动距离是否小于previous_keep,减少误动作.
            if(
                (touch_previous.x<touch->x+previous_keep)
                && (touch_previous.x>touch->x-previous_keep)
                && (touch_previous.y<touch->y+previous_keep)
                && (touch_previous.y>touch->y-previous_keep)  )
            {
                return;
            }

touch_previous.x = touch->x;
            touch_previous.y = touch->y;

/* send mouse event */
            emouse.parent.type = RTGUI_EVENT_MOUSE_BUTTON ;
            emouse.parent.sender = RT_NULL;

emouse.x = touch->x;
            emouse.y = touch->y;

/* init mouse button */
            emouse.button = (RTGUI_MOUSE_BUTTON_RIGHT |RTGUI_MOUSE_BUTTON_DOWN);
//            rt_kprintf("touch motion: (%d, %d)
", emouse.x, emouse.y);
        }
    }

/* send event to server */
    if (touch->calibrating != RT_TRUE)
        rtgui_server_post_event(&emouse.parent, sizeof(struct rtgui_event_mouse));
}
```