/// <summary>
/// 有新的通知消息到达
/// </summary>
/// <param name="notifyMsgModel"></param>
private void OnNewMsgReached(NotifyMsgModel notifyMsgModel)
{
//判断计时器是否正在运行
//如果没有运行代表当前没有显示消息，则直接显示否则加入缓存
if (!_displayingMsg)
{
DisplayMsg(notifyMsgModel);
}
else
{
//当前正在处理信息显示，则直接加到队尾
lock (_msgs)
{
_msgs.Enqueue(notifyMsgModel);
}
}
}
private void NotifyNewMsg(object obj)
{
if (NewMsgReached != null)
{
for (int i = 0; i < 5; i++)
{
var newNotifyMsgModel = new NotifyMsgModel
{
Id = _mockIndex,
Title = string.Format("第{0}条消息，{1} ", _mockIndex, DateTime.Now) + Guid.NewGuid() + Guid.NewGuid(),
Content = Guid.NewGuid().ToString("N")
};
_mockIndex++;
NewMsgReached(newNotifyMsgModel);
}
}
}
public NotifyMsgItem(NotifyMsgModel notifyMsgModel)
{
NotifyMsgModel = notifyMsgModel;
InitializeComponent();
}
private async void DisplayMsg(NotifyMsgModel msg)
{
if (msg != null)
{
_displayingMsg = true;
//展示信息
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
var item = new NotifyMsgItem(msg)
{
HorizontalAlignment = HorizontalAlignment.Center,
Opacity = 1,
Margin = new Thickness(0, ActualHeight + 10, 0, 0)
};
_container.Children.Add(item);
//向上滑动动画总显示时间减1秒
var floatAnimation = new ThicknessAnimation();
floatAnimation.From = new Thickness(0, ActualHeight + 10, 0, 0);
floatAnimation.To = new Thickness(0);
floatAnimation.Duration = new Duration(TimeSpan.FromSeconds(_displaySeconds - 1));
item.BeginAnimation(MarginProperty, floatAnimation);
});
await Task.Delay(TimeSpan.FromSeconds(_delayNextMsgSecond));
//判断缓存中是否还有待显示信息
NotifyMsgModel nextMsg = null;
lock (_msgs)
{
if (_msgs.Count > 0)
{
nextMsg = _msgs.Dequeue();
}
}
if (nextMsg != null)
{
DisplayMsg(nextMsg);
}
else
{
_displayingMsg = false;
}
await Task.Delay(TimeSpan.FromSeconds(_displaySeconds - _delayNextMsgSecond - 1));
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
var item = _container.Children[0];
//显示完成，隐藏动画耗时1秒
var opacityAnimation = new DoubleAnimation();
opacityAnimation.From = 1;
opacityAnimation.To = 0;
opacityAnimation.Duration = new Duration(TimeSpan.FromSeconds(1));
item.BeginAnimation(OpacityProperty, opacityAnimation);
});
//等待主线程完成
await Task.Delay(TimeSpan.FromSeconds(1));
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
var item = _container.Children[0];
_container.Children.Remove(item);
});
}
}
