protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (e.LeftButton != MouseButtonState.Pressed)
this.dragStartPoint = null;
if (this.dragStartPoint.HasValue)
{
// XamlWriter.Save() has limitations in exactly what is serialized,
// see SDK documentation; short term solution only;
string xamlString = XamlWriter.Save(this.Content);
DragObject dataObject = new DragObject();
dataObject.Xaml = xamlString;
WrapPanel panel = VisualTreeHelper.GetParent(this) as WrapPanel;
if (panel != null)
{
// desired size for DesignerCanvas is the stretched Toolbox item size
double hscale = 1.4;
double vscale = 0.7;
dataObject.DesiredSize = new Size(panel.ItemWidth * hscale, panel.ItemHeight * vscale);
}
DragDrop.DoDragDrop(this, dataObject, DragDropEffects.Copy);
e.Handled = true;
}
}