private void OnDragInitialize(object sender, DragInitializeEventArgs args)
{
args.AllowedEffects = DragDropEffects.All;
if (args.OriginalSource.GetType() == typeof(Telerik.Windows.Controls.RadListBoxItem))
{
var draggedShape = (args.OriginalSource as Telerik.Windows.Controls.RadListBoxItem).ChildrenOfType<RadDiagramShapeBase>().FirstOrDefault();
if (draggedShape != null)
{
var shapeSize = new Size(draggedShape.ActualWidth, draggedShape.ActualHeight);
if (shapeSize.Width > 0 && shapeSize.Height > 0)
{
var dropInfo = new DiagramDropInfo(shapeSize, SerializationService.Default.SerializeItems(new List<IDiagramItem> {draggedShape}));
args.Data = dropInfo;
args.DragVisualOffset = new Point(args.RelativeStartPoint.X - (shapeSize.Width / 2), args.RelativeStartPoint.Y - (shapeSize.Height / 2));
var draggingImage = new System.Windows.Controls.Image
{
Source = new Telerik.Windows.Media.Imaging.RadBitmap(draggedShape).Bitmap,
Width = shapeSize.Width,
Height = shapeSize.Height
};
args.DragVisual = draggingImage;
}
}
}
}
private static void OnDragInitialize(object sender, DragInitializeEventArgs args)
{
var container = args.OriginalSource as RadListBoxItem;
if (container != null)
{
var toolboxItem = container.Content as IToolboxItem;
if (toolboxItem != null)
{
var shape = toolboxItem.CreateShape();
if (shape != null)
{
var element = container.Content as FrameworkElement;
if (element != null)
{
var shapeSize = new Size(element.ActualWidth, element.ActualHeight);
var dragDropInfo = new DiagramDropInfo(shapeSize, SerializationService.Default.SerializeItems(new[] { shape }));
args.Data = dragDropInfo;
args.DragVisualOffset = new Point(args.RelativeStartPoint.X - (shapeSize.Width / 2), args.RelativeStartPoint.Y - (shapeSize.Height / 2));
args.DragVisual = new Image { Source = new RadBitmap(element).Bitmap, Width = shapeSize.Width, Height = shapeSize.Height };
}
}
args.AllowedEffects = DragDropEffects.All;
args.Handled = true;
}
}
else
{
args.Cancel = true;
}
}
