public HoldCardInteraction(DragImage draggedImage, ItemsControl context, ScrollViewer scrollViewer)
{
_draggedImage = draggedImage;
_context = context;
_scrollViewer = scrollViewer;
IsEnabled = true;
}
public DragVerticalInteraction(DragImage dragImage, ItemsControl itemsControl, ScrollViewer scrollViewer,
IEventAggregator eventAggregator)
{
_dragImage = dragImage;
_itemsControl = itemsControl;
_eventAggregator = eventAggregator;
_scrollViewer = scrollViewer;
_cardsModel = (BindableCollection<CardViewModel>) itemsControl.ItemsSource;
// This indexes the cards and their positions in the list
// so that we can more readily determine how to visually reorganize
_pointIndex = new PointIndex();
// setup the timer that solves movement and card relations
_dispatcherTimer = new DispatcherTimer {Interval = TimeSpan.FromMilliseconds(50)};
_dispatcherTimer.Tick += (sender, args) =>
{
AutoScrollLayout();
ReorganizeLayout();
};
}
private static void PopoutCard(UIElement element, DragImage image, Point relativePosition)
{
// Copy the selected card into a bitmap for use as the movement target
var bitmap = new WriteableBitmap(element, null);
image.Image.Source = bitmap;
image.Visibility = Visibility.Visible;
image.Opacity = 1.0;
// this needs to be relative to the scrolled position
image.SetVerticalOffset(relativePosition.Y);
//image.SetHorizontalOffset(relativePosition.X);
// hide the underlying item
element.Opacity = 0.0;
}