private void MoveThumb_DragStarted(object sender, DragStartedEventArgs e)
{
this.designerItem = DataContext as DesignerItem;
if (this.designerItem != null)
{
this.designerCanvas = VisualTreeHelper.GetParent(this.designerItem) as DesignerCanvas;
}
}
protected override void OnDrop(DragEventArgs e)
{
base.OnDrop(e);
string xamlString = e.Data.GetData("DESIGNER_ITEM") as string;
if (!String.IsNullOrEmpty(xamlString))
{
DesignerItem newItem = null;
FrameworkElement content = XamlReader.Load(XmlReader.Create(new StringReader(xamlString))) as FrameworkElement;
if (content != null)
{
newItem = new DesignerItem();
newItem.Content = content;
Point position = e.GetPosition(this);
if (content.MinHeight != 0 && content.MinWidth != 0)
{
newItem.Width = content.MinWidth * 2; ;
newItem.Height = content.MinHeight * 2;
}
else
{
newItem.Width = 65;
newItem.Height = 65;
}
DesignerCanvas.SetLeft(newItem, Math.Max(0, position.X - newItem.Width / 2));
DesignerCanvas.SetTop(newItem, Math.Max(0, position.Y - newItem.Height / 2));
this.Children.Add(newItem);
this.DeselectAll();
newItem.IsSelected = true;
}
e.Handled = true;
}
}