你好：
创建一个空白屏幕，内部没有任何obj，我鼠标在里面点击会触发pressing之类的事件吗？
我在调试input设备中的pointer，发现自己在空白屏幕内如何点击都不会触发事件。
代码如下：
void input_mouse(void)
{
lv_group_t* group1 = lv_group_create();
/*Initialize your mouse if you have*/
mouse_init();
/*Register a mouse input device*/
lv_indev_drv_init(&indev_drv); //初始化结构体
indev_drv.type = LV_INDEV_TYPE_POINTER;//输入设备类型,当前为鼠标
indev_drv.read_cb = mouse_read;//回调函数,用于定期(几乎实时)获取输入设备的数据
indev_mouse = lv_indev_drv_register(&indev_drv);//注册输入设备
lv_indev_set_group(indev_mouse, group1);
/*Set cursor. For simplicity set a HOME symbol now.*/
lv_obj_t* mouse_cursor = lv_img_create(lv_scr_act()); //创建光标对象
lv_img_set_src(mouse_cursor, LV_SYMBOL_HOME); //设置光标图像的来源
lv_indev_set_cursor(indev_mouse, mouse_cursor);//链接显示驱动
}
static void mouse_read(lv_indev_drv_t * indev_drv, lv_indev_data_t * data)
{
//LV_LOG_ERROR("7777777777\n");
/*Get the current x and y coordinates*/
mouse_get_xy(&data->point.x, &data->point.y);
/*Get whether the mouse button is pressed or released*/
if(mouse_is_pressed()) {
LV_LOG_ERROR("112123213\n");
data->state = LV_INDEV_STATE_PR;
}
else {
data->state = LV_INDEV_STATE_REL;
}
}
static bool mouse_is_pressed(void)
{
/Your code comes here/
if (indev_mouse->proc.state == LV_INDEV_STATE_PRESSED)
{
return 1;
}
return false;
}
static void mouse_get_xy(lv_coord_t * x, lv_coord_t * y)
{
/Your code comes here/
(*x) = indev_mouse->proc.types.pointer.act_point.x;
(*y) = indev_mouse->proc.types.pointer.act_point.y;
//LV_LOG_ERROR("The mouse is now at x:%d y%d \n", *x, *y);
}
这里面，我已经将鼠标加入group，然后indev_mouse这个结构体就是没有值，我想知道是不是如我标题说的那样，就是不会触发，必须点到某个obj才行