RT-GUI触摸BUG?

发布于 2015-01-04 22:29:34 浏览：2580 订阅该版

在https://github.com/RT-Thread/RTGUI/blob/master/components/rtgui/server/touch.c中的
```rt_bool_t rtgui_touch_do_calibration(struct rtgui_event_touch *event)
{
#ifdef RTGUI_USING_CALIBRATION
/* calibration mode */
if (_calibrating == RT_TRUE)
{
/* only do the calibration on touch UP */
if (event->up_down == RTGUI_TOUCH_UP && _cali_ops != RT_NULL &&
_cali_ops->calibration_post != RT_NULL)
_cali_ops->calibration_post(event->x, event->y);
return RT_FALSE;
}
#endif
if (event->up_down == RTGUI_TOUCH_UP)
{
x_prev = 0; y_prev = 0;
}
else
{
if (!((x_prev > event->x + RTGUI_TOUCH_SMOOTH) ||
(x_prev < event->x - RTGUI_TOUCH_SMOOTH) ||
(y_prev > event->y + RTGUI_TOUCH_SMOOTH) ||
(y_prev < event->y - RTGUI_TOUCH_SMOOTH)))
{
/* smooth the touch point */
return RT_FALSE;
}
x_prev = event->x;
y_prev = event->y;
}
/* update touch (x, y) with calibrated data */
if (_cali_ops != RT_NULL && _cali_ops->calibrate_x != RT_NULL)
//调试时发现event->x传入为384,函数执行完毕后返回后event->x=0
event->x = _cali_ops->calibrate_x(event->x, event->y);
            
if (_cali_ops != RT_NULL && _cali_ops->calibrate_y != RT_NULL)
//在这里，event->x已经被改变了，不是之前的384了，变成0了，导致y值校准错误，返回的是一个错误值(一个很大的数值)
event->y = _cali_ops->calibrate_y(event->x, event->y);
        
return RT_TRUE;
}```

把代码
```/* update touch (x, y) with calibrated data */
if (_cali_ops != RT_NULL && _cali_ops->calibrate_x != RT_NULL)
//调试时发现event->x传入为384,函数执行完毕后返回后event->x=0
event->x = _cali_ops->calibrate_x(event->x, event->y);
            
if (_cali_ops != RT_NULL && _cali_ops->calibrate_y != RT_NULL)
//在这里，event->x已经被改变了，不是之前的384了，变成0了，导致y值校准错误，返回的是一个错误值(一个很大的数值)
event->y = _cali_ops->calibrate_y(event->x, event->y);
        
return RT_TRUE;
}```
修改成下面后，触摸可以正常使用了
```	
if (_cali_ops != RT_NULL && _cali_ops->calibrate_x != RT_NULL)
x = _cali_ops->calibrate_x(event->x, event->y);
if (_cali_ops != RT_NULL && _cali_ops->calibrate_y != RT_NULL)
y = _cali_ops->calibrate_y(event->x, event->y);
event->x = x;
event->y = y;

return RT_TRUE;
}
```