// Drop functionality
private void canvas_Drop(object sender, DragEventArgs e)
{
if (e.Handled == false)
{
Canvas _panel = (Canvas)sender; // get the current canvas
UIElement _element = (UIElement)e.Data.GetData("Object"); //get the information
string keyValue = (string)e.Data.GetData("AnyKey"); // get any key value
if (_panel != null && _element != null)
{
Panel _parent = (Panel)VisualTreeHelper.GetParent(_element);
if (_parent != null)
{
if (e.AllowedEffects.HasFlag(DragDropEffects.Move) && _parent.Name == "drawingCanvas")
{
if (_element is PackageDiagram)
{
Canvas.SetLeft(_element, e.GetPosition(_panel).X - 50);
Canvas.SetTop(_element, e.GetPosition(_panel).Y - 50);
}
if (_element is UsingConnector)
{
Canvas.SetLeft(_element, e.GetPosition(_panel).X - 20);
Canvas.SetTop(_element, e.GetPosition(_panel).Y - 20);
}
}
else
{
if (_element is PackageDiagram)
{
PackageDiagram _package = new PackageDiagram((PackageDiagram)_element);
Canvas.SetLeft(_package, e.GetPosition(_panel).X - 50);
Canvas.SetTop(_package, e.GetPosition(_panel).Y - 50);
_panel.Children.Add(_package);
}
if (_element is UsingConnector)
{
UsingConnector _conn = new UsingConnector((UsingConnector)_element);
Canvas.SetLeft(_conn, e.GetPosition(_panel).X - 20);
Canvas.SetTop(_conn, e.GetPosition(_panel).Y - 20);
_panel.Children.Add(_conn);
}
e.Effects = DragDropEffects.Move;
}
}
}
}
}
public UsingConnector(UsingConnector c)
{
InitializeComponent();
}