public UIDropProposal SessionDidUpdate(UIDropInteraction interaction, IUIDropSession session)
{
UIDropOperation operation = UIDropOperation.Cancel;
if (session.LocalDragSession == null)
{
return(new UIDropProposal(operation));
}
if (interaction.View is IVisualElementRenderer renderer)
{
DataPackage package = null;
if (session.LocalDragSession.Items.Length > 0 &&
session.LocalDragSession.Items[0].LocalObject is CustomLocalStateData cdi)
{
package = cdi.DataPackage;
}
if (HandleDragOver((View)renderer.Element, package))
{
operation = UIDropOperation.Copy;
}
}
return(new UIDropProposal(operation));
}
public UIDropProposal SessionDidUpdate(UIDropInteraction interaction, IUIDropSession session)
{
var dropLocation = session.LocationInView(View);
UpdateLayers(dropLocation);
var operation = new UIDropOperation();
if (ImageView.Frame.Contains(dropLocation))
{
operation = session.LocalDragSession == null ? UIDropOperation.Copy : UIDropOperation.Move;
}
else
{
// Cancel dropping if it's not inside the image view.
operation = UIDropOperation.Cancel;
}
return(new UIDropProposal(operation));
}
public UIDropProposal SessionDidUpdate(UIDropInteraction interaction, IUIDropSession session)
{
UIDropOperation operation = UIDropOperation.Cancel;
if (session.LocalDragSession == null)
{
return(new UIDropProposal(operation));
}
DataPackage package = null;
if (session.LocalDragSession.Items.Length > 0 &&
session.LocalDragSession.Items[0].LocalObject is CustomLocalStateData cdi)
{
package = cdi.DataPackage;
}
if (HandleDragOver((View)_viewHandler.VirtualView, package))
{
operation = UIDropOperation.Copy;
}
return(new UIDropProposal(operation));
}
public void SessionDidEnd(UIDragInteraction interaction, IUIDragSession session, UIDropOperation operation)
{
Alpha = 1f;
}
public void SessionWillEnd(UIDragInteraction interaction, IUIDragSession session, UIDropOperation operation)
{
if (operation == UIDropOperation.Copy)
{
FadeItems(session.Items, 1f);
}
}
public void SessionWillEnd(UIDragInteraction interaction, IUIDragSession session, UIDropOperation operation)
{
if ((operation == UIDropOperation.Cancel || operation == UIDropOperation.Forbidden) &&
session.Items.Length > 0 &&
session.Items[0].LocalObject is CustomLocalStateData cdi)
{
this.HandleDropCompleted(cdi.View);
}
}
