private int _delayTime = 300; //延时时间。
public void DragOver(DropInfo info)
{
_mouseOn = true;
if (info.KeyStates.HasFlag(DragDropKeyStates.ControlKey))
{
info.Effects = DragDropEffects.Copy;
}
else
{
info.Effects = DragDropEffects.Move;
}
if (!_accepted)
{
VideoPanelItem vpi = info.Target as VideoPanelItem;
VideoPanelItem srcVpi = info.Source as VideoPanelItem;
//延时拖动接收。
if (Environment.TickCount - _startTick < _delayTime)
{
return;
}
string videoId = info.Data as string;
if (videoId == null && info.DataType.ToUpper().EndsWith(".STRING"))
{
videoId = info.GetDataFromJson <string>();
}
if (videoId == null)
{
info.Effects = DragDropEffects.None;
return;
}
if (vpi != null && videoId != null && !vpi.Equals(srcVpi))
{
_videoMode = vpi.ViewModel.ControlViewModel;
DropAdorner = CreateAdorner(vpi);
DropAdorner.VisualCover.Visibility = Visibility.Hidden;
//
Point toPnt = new Point(0, 0);
double scaleX = 1;
double scaleY = 1;
if (srcVpi != null && IsBrothers(srcVpi, vpi))
{
//隐藏源的视频。
if (vpi.VideoControl != null && vpi.ViewModel.ControlViewModel.IsVisible)
{
_videoMode.Opacity = 0;
DropAdorner.VisualCover.Visibility = Visibility.Visible;
toPnt = vpi.PointFromScreen(srcVpi.PointToScreen(new Point(0, 0)));
scaleX = srcVpi.ActualWidth / vpi.ActualWidth;
scaleY = srcVpi.ActualHeight / vpi.ActualHeight;
}
}
//启动动画。
Storyboard sb = CreateStoryboard(toPnt, scaleX, scaleY, 1);
sb.Begin(DropAdorner, true);
_accepted = true;
}
}
}
public void Drop(DropInfo info)
{
_mouseOn = false;
_accepted = false;
ResetAdorner();
if (_videoMode != null)
{
_videoMode.Opacity = 1;
_videoMode = null;
}
string videoId = info.Data as string;
if (videoId == null)
{
videoId = info.GetDataFromJson <string>();
}
if (videoId != null)
{
VideoPanelItem vpi = info.Target as VideoPanelItem;
if (vpi != null)
{
VideoPanelItem srcVpi = info.Source as VideoPanelItem;
if (srcVpi != null && !srcVpi.Equals(vpi) &&
!info.KeyStates.HasFlag(DragDropKeyStates.ControlKey))
{
//没有交换则直接设置ID。
if (!Exchange(srcVpi, vpi))
{
vpi.PlayVideo(videoId);
info.Effects = DragDropEffects.Copy;
}
else
{
info.Effects = DragDropEffects.Move;
}
}
else
{
vpi.PlayVideo(videoId);
info.Effects = DragDropEffects.Move;
}
}
}
}
private void Panel_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
if (ViewModel.OnSwitching && !ViewModel.SwitchPaused)
{
ViewModel.SwitchPaused = true;
e.Handled = true;
return;
}
VideoPanelItem item = sender as VideoPanelItem;
foreach (VideoPanelItem vpi in gridMain.Children)
{
if (!item.Equals(vpi))
{
vpi.ViewModel.ControlViewModel.IsControlPanelVisible = false;
vpi.ViewModel.SearchedResultModel.IsVisible = false;
vpi.ViewModel.PlusSignModel.IsVisible = true;
}
}
}