UIDragPreviewParameters PreviewParameters(NSIndexPath indexPath)
{
var cell = CollectionView.CellForItem(indexPath) as PhotoCollectionViewCell;
var previewParameters = new UIDragPreviewParameters();
previewParameters.VisiblePath = UIBezierPath.FromRect(cell.ClippingRectForPhoto);
return(previewParameters);
}
private UIDragPreview DragPreviewForItem()
{
if (Image == null || MapItem == null)
{
return(new UIDragPreview(this));
}
var previewView = new LocationPlatterView(Image, MapItem);
var inflatedBounds = previewView.Bounds.Inset(-20, -20);
var parameters = new UIDragPreviewParameters()
{
VisiblePath = UIBezierPath.FromRoundedRect(inflatedBounds, 20f)
};
return(new UIDragPreview(previewView, parameters));
}
private UITargetedDragPreview DragPreviewForItem(UIDragItem item)
{
var qrCode = item.LocalObject as QRDetectionResult;
if (qrCode == null)
{
return(new UITargetedDragPreview(this));
}
var previewView = new UIImageView(qrCode.CroppedImage);
previewView.Frame = ConvertRectToView(this.ConvertFromImageRect(qrCode.RectInOriginalImage), Window);
var target = new UIDragPreviewTarget(Window, previewView.Center);
var parameters = new UIDragPreviewParameters()
{
VisiblePath = UIBezierPath.FromRoundedRect(previewView.Bounds, 20f)
};
return(new UITargetedDragPreview(previewView, parameters, target));
}
