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;
}
}
}
private bool ShowVideoWin(DragInfo info, VideoPanelItem vpi)
{
if (_topWin != null)
{
string videoID = (string)info.Data;
PopupWinModel model = new PopupWinModel(videoID);
PopupWin popup = new PopupWin();
popup.IsTopmost = true;
popup.DataContext = model;
Point startPos = info.GetPosition(vpi);
startPos = vpi.PointToScreen(startPos);
startPos = new Point(startPos.X - vpi.ActualWidth / 2, startPos.Y - vpi.ActualHeight / 2);
if (startPos.X < 0)
{
startPos.X = 0;
}
if (startPos.Y < 0)
{
startPos.Y = 0;
}
popup.Left = startPos.X;
popup.Top = startPos.Y;
if (vpi.ActualWidth < AppConstants.VideoControlMinWidth)
{
popup.Width = AppConstants.VideoControlMinWidth;
if (vpi.ActualHeight == 0)
{
popup.Height = AppConstants.VideoControlMinWidth * 0.75;
}
else
{
popup.Height = vpi.ActualHeight * (AppConstants.VideoControlMinWidth / vpi.ActualWidth);
}
}
else
{
popup.Width = vpi.ActualWidth;
popup.Height = vpi.ActualHeight;
}
popup.Show();
return(true);
}
return(false);
}
