private ITypeId ComputeInstanceType(IDataObject dataObject)
{
TypeAsset typeAsset = AssetDropToolBehavior.GetAssetFromDropData(dataObject) as TypeAsset;
if (typeAsset != null)
{
return((ITypeId)typeAsset.Type);
}
return((ITypeId)null);
}
protected override bool OnDragOver(DragEventArgs args)
{
bool flag = false;
Point position = args.GetPosition((IInputElement)this.ActiveView.ViewRootContainer);
this.UpdatePreviewElement(position);
Asset assetFromDropData = AssetDropToolBehavior.GetAssetFromDropData(args.Data);
if (assetFromDropData != null)
{
this.instanceType = this.ComputeInstanceType(args.Data);
ISceneInsertionPoint insertionPoint = this.GetInsertionPoint(position);
flag = assetFromDropData.CanCreateInstance(insertionPoint);
}
args.Effects = flag ? DragDropEffects.Copy : DragDropEffects.None;
args.Handled = true;
return(true);
}
protected override bool OnDrop(DragEventArgs args)
{
Asset assetFromDropData = AssetDropToolBehavior.GetAssetFromDropData(args.Data);
if (assetFromDropData != null)
{
Point position = args.GetPosition((IInputElement)this.ActiveView.ViewRootContainer);
ISceneInsertionPoint insertionPoint = this.GetInsertionPoint(position);
this.ToolBehaviorContext.SnappingEngine.Start(this.ToolBehaviorContext, (BaseFrameworkElement)null, (IList <BaseFrameworkElement>)null);
Point point = this.ToolBehaviorContext.SnappingEngine.SnapPoint(position, EdgeFlags.All);
this.ToolBehaviorContext.SnappingEngine.Stop();
if (assetFromDropData != null && assetFromDropData.CanCreateInstance(insertionPoint))
{
SceneView activeView = this.ActiveView;
Rect rect = new Rect(activeView.TransformPoint((IViewObject)activeView.HitTestRoot, insertionPoint.SceneElement.Visual, point), new Size(double.PositiveInfinity, double.PositiveInfinity));
assetFromDropData.CreateInstance(this.ActiveView.DesignerContext.LicenseManager, insertionPoint, rect, (OnCreateInstanceAction)null);
activeView.TryEnterTextEditMode(true);
}
}
this.OnDragDropFinished();
return(true);
}
internal static bool CanHandleDropData(IDataObject dataObj)
{
return(AssetDropToolBehavior.GetAssetFromDropData(dataObj) != null);
}
