//设置视频窗口的可拖拽属性。
private void SetDragDropParam(VideoPanelItem vpi)
{
vpi.SetValue(DragDropTool.AllowDropProperty, true);
vpi.SetValue(DragDropTool.DropHandlerProperty, new VideoPanelDropHandler());
vpi.SetValue(DragDropTool.DragHandlerProperty, new VideoPanelDragHandler());
//允许拖动
Binding binding = CreateBinding(vpi.DataContext, BindingMode.OneWay, "ControlViewModel.IsVisible");
vpi.SetBinding(DragDropTool.AllowDragProperty, binding);
//设置拖动数据
binding = CreateBinding(vpi.DataContext, BindingMode.OneWay, "ControlViewModel.VideoId");
vpi.SetBinding(DragDropData.DataProperty, binding);
//设置可视化
vpi.SetValue(DragDropVisual.ShadowVisibleProperty, true);
vpi.SetValue(DragDropVisual.ShadowColorProperty, Color.FromRgb(0, 255, 0));
vpi.SetValue(DragDropVisual.BorderThicknessProperty, new Thickness(2));
}
public void DragStart(DragInfo info)
{
VideoPanelItem vpi = info.Source as VideoPanelItem;
if (vpi.VideoControl != null)
{
Binding binding = new Binding();
binding.Mode = BindingMode.OneWay;
binding.Source = vpi.VideoControl.videoDisp;
vpi.SetBinding(DragDropVisual.VisualProperty, binding);
_topWin = FindTopWindow(vpi);
updateOpacity(vpi, 0);
}
}