public UIDragItem[] GetItemsForBeginningSession(UIDragInteraction interaction, IUIDragSession session)
{
bool isEven = Convert.ToInt16(NumberLabel.Text) % 2 == 0;
var provider = new NSItemProvider(new NSString(NumberLabel.Text));
var item = new UIDragItem(provider)
{
LocalObject = new NSNumber(isEven)
};
return(new UIDragItem[] { item });
}
public UIDragItem[] GetItemsForBeginningSession(UIDragInteraction interaction, IUIDragSession session)
{
var results = new List <UIDragItem>();
if (MapItem == null)
{
return(results.ToArray());
}
var itemProvider = new NSItemProvider(MapItem);
itemProvider.RegisterObject(Image, NSItemProviderRepresentationVisibility.All);
results.Add(new UIDragItem(itemProvider));
return(results.ToArray());
}
public void SessionWillBegin(UIDragInteraction interaction, IUIDragSession session)
{
session.Items[0].PreviewProvider = DragPreviewForItem;
}
public void WillAnimateLift(UIDragInteraction interaction, IUIDragAnimating animator, IUIDragSession session)
{
animator.AddAnimations(() => {
Alpha = 0.25f;
});
}
public UITargetedDragPreview GetPreviewForLiftingItem(UIDragInteraction interaction, UIDragItem item, IUIDragSession session)
{
var imageView = new UIImageView(Image)
{
Frame = this.Frame,
ClipsToBounds = true,
ContentMode = UIViewContentMode.ScaleAspectFill
};
var target = new UIDragPreviewTarget(Superview, imageView.Center);
return(new UITargetedDragPreview(imageView, new UIDragPreviewParameters(), target));
}
public UITargetedDragPreview GetPreviewForLiftingItem(UIDragInteraction interaction, UIDragItem item, IUIDragSession session)
{
var image = item.LocalObject as UIImage;
if (image == null)
{
return(null);
}
CGRect frame;
if (image.Size.Width > image.Size.Height)
{
var multiplier = ImageView.Frame.Width / image.Size.Width;
frame = new CGRect(0, 0, ImageView.Frame.Width, ImageView.Frame.Height * multiplier);
}
else
{
var multiplier = ImageView.Frame.Height / image.Size.Height;
frame = new CGRect(0, 0, ImageView.Frame.Width * multiplier, ImageView.Frame.Height);
}
var previewImageView = new UIImageView(image)
{
ContentMode = UIViewContentMode.ScaleAspectFit,
Frame = frame
};
var target = new UIDragPreviewTarget(ImageView, ImageView.Center);
return(new UITargetedDragPreview(previewImageView, new UIDragPreviewParameters(), target));
}
public UIDragItem[] GetItemsForAddingToSession(UIDragInteraction interaction, IUIDragSession session, CGPoint point)
{
return(DragItems);
}
public UIDragItem[] GetItemsForBeginningDragSession(UICollectionView collectionView, IUIDragSession session, NSIndexPath indexPath)
{
var dragItem = DragItem(indexPath);
return(new UIDragItem[] { dragItem });
}
public UIDragItem [] GetItemsForBeginningDragSession(UICollectionView collectionView, IUIDragSession session, NSIndexPath indexPath)
{
var selectedPhoto = GetPhoto(indexPath);
var userActivity = selectedPhoto.OpenDetailUserActivity();
var itemProvider = new NSItemProvider(UIImage.FromFile(selectedPhoto.Name));
itemProvider.RegisterObject(userActivity, NSItemProviderRepresentationVisibility.All);
var dragItem = new UIDragItem(itemProvider)
{
LocalObject = selectedPhoto
};
return(new [] { dragItem });
}
public void DragSessionWillBegin(UICollectionView collectionView, IUIDragSession session)
{
albumBeforeDrag = album;
}
public void DragSessionDidEnd(UICollectionView collectionView, IUIDragSession session)
{
ReloadAlbumFromPhotoLibrary();
DeleteItems(collectionView);
albumBeforeDrag = null;
}
public UIDragItem[] GetItemsForAddingToDragSession(UICollectionView collectionView, IUIDragSession session, Foundation.NSIndexPath indexPath, CoreGraphics.CGPoint point)
{
var dragItem = DragItem(indexPath);
return(new UIDragItem[] { dragItem });
}
/// <summary>
/// Required for drag operations from a table
/// </summary>
public UIDragItem[] GetItemsForBeginningDragSession(UITableView tableView, IUIDragSession session, NSIndexPath indexPath)
{
return(model.DragItems(indexPath));
}
public UITargetedDragPreview GetPreviewForLiftingItem(UIDragInteraction interaction, UIDragItem item, IUIDragSession session)
{
var imageView = item.LocalObject as UIImageView;
if (imageView == null)
{
return(null);
}
return(new UITargetedDragPreview(imageView));
}
public UIDragItem[] GetItemsForBeginningSession(UIDragInteraction interaction, IUIDragSession session)
{
if (interaction.View is IVisualElementRenderer renderer && renderer.Element is View view)
{
return(HandleDragStarting(view, renderer));
}
return(new UIDragItem[0]);
}
public UIDragItem[] GetItemsForBeginningSession(UIDragInteraction interaction, IUIDragSession session)
{
return(DragItems);
}
public UIDragItem[] GetItemsForBeginningSession(UIDragInteraction interaction, IUIDragSession session)
{
return(HandleDragStarting((View)_viewHandler.VirtualView, _viewHandler));
}
/// <summary>
/// 'GetItemsForBeginningSession' allows dragging from a view.
/// </summary>
public UIDragItem [] GetItemsForBeginningSession(UIDragInteraction interaction, IUIDragSession session)
{
var image = ImageView.Image;
if (image == null)
{
return new UIDragItem [] { }
}
;
var provider = new NSItemProvider(image);
var item = new UIDragItem(provider)
{
LocalObject = image
};
// If a non empty array is returned, dragging is enabled.
return(new UIDragItem [] { item });
}
