public static void DragSelected(this ISelectionService selectionService, DependencyObject dragSource)
{
if (selectionService == null)
{
throw new ArgumentNullException(nameof(selectionService));
}
var selected = selectionService.GetSelected();
//Make sure we have something to work with
if (selected.Length == 0)
{
return;
}
var elements = selected.OfType <IElement>()
.ToArray();
//Make sure that these are all elements
if (elements.Length != selected.Length)
{
return;
}
//Serialize for the clipboard
var momento = new ElementClipboardData(elements);
//Perform the operation
var result = DragDrop.DoDragDrop(dragSource, momento, DragDropEffects.Copy | DragDropEffects.Move);
if ((result & DragDropEffects.Move) == DragDropEffects.Move)
{
//Unselect these - they're going away.
selectionService.SelectNone();
//Remove the originals from their spots
foreach (var element in elements)
{
//Remove the element from where it came from
element.Parent?.RemoveElement(element);
}
}
}
public static void DragSelected(this ISelectionService selectionService, DependencyObject dragSource)
{
if (selectionService == null) throw new ArgumentNullException(nameof(selectionService));
var selected = selectionService.GetSelected();
//Make sure we have something to work with
if (selected.Length == 0)
return;
var elements = selected.OfType<IElement>()
.ToArray();
//Make sure that these are all elements
if (elements.Length != selected.Length)
return;
//Serialize for the clipboard
var momento = new ElementClipboardData(elements);
//Perform the operation
var result = DragDrop.DoDragDrop(dragSource, momento, DragDropEffects.Copy | DragDropEffects.Move);
if ((result & DragDropEffects.Move) == DragDropEffects.Move)
{
//Unselect these - they're going away.
selectionService.SelectNone();
//Remove the originals from their spots
foreach (var element in elements)
{
//Remove the element from where it came from
element.Parent?.RemoveElement(element);
}
}
}
private void HandleDrag(DragEventArgs e, bool drop)
{
this.PerformViewModelAction<FunctionEditorDialogViewModel>(editor =>
{
var data = e.Data.GetData(typeof(ElementClipboardData)) as IElementClipboardData;
if (data == null)
{
var factory = e.Data.GetData(typeof(ElementFactory)) as IElementFactory;
if (factory == null)
{
e.Effects = DragDropEffects.None;
return;
}
//Create data from the factory
data = new ElementClipboardData(factory);
}
//Get the position relative to the design surface
var position = e.GetPosition(DesignRoot);
//Find the drop target
var dropTarget = DesignRoot.GetDropTarget(position, data);
//Check to see if we can do this
if (dropTarget == null)
{
if (!editor.Function.CanDrop(data))
{
e.Effects = DragDropEffects.None;
return;
}
}
else
{
if (!dropTarget.CanDrop(data))
{
e.Effects = DragDropEffects.None;
return;
}
}
if (((e.AllowedEffects & DragDropEffects.Move) == DragDropEffects.Move) &&
((e.AllowedEffects & DragDropEffects.Copy) == DragDropEffects.Copy) &&
data.SourceFunctionId.HasValue &&
data.SourceFunctionId.Value != editor.Function.Id)
{
e.Effects = DragDropEffects.Copy;
}
else if ((e.AllowedEffects & DragDropEffects.Move) == DragDropEffects.Move)
{
e.Effects = DragDropEffects.Move;
}
else if ((e.AllowedEffects & DragDropEffects.Copy) == DragDropEffects.Copy)
{
e.Effects = DragDropEffects.Copy;
}
if (drop)
{
if (dropTarget == null)
{
editor.Function.Drop(data, false);
}
else
{
dropTarget.Drop(data);
}
CurrentDropTarget = null;
}
else
{
CurrentDropTarget = dropTarget;
}
e.Handled = true;
});
}
private void HandleDrag(DragEventArgs e, bool drop)
{
this.PerformViewModelAction <FunctionEditorDialogViewModel>(editor =>
{
var data = e.Data.GetData(typeof(ElementClipboardData)) as IElementClipboardData;
if (data == null)
{
var factory = e.Data.GetData(typeof(ElementFactory)) as IElementFactory;
if (factory == null)
{
e.Effects = DragDropEffects.None;
return;
}
//Create data from the factory
data = new ElementClipboardData(factory);
}
//Get the position relative to the design surface
var position = e.GetPosition(DesignRoot);
//Find the drop target
var dropTarget = DesignRoot.GetDropTarget(position, data);
//Check to see if we can do this
if (dropTarget == null)
{
if (!editor.Function.CanDrop(data))
{
e.Effects = DragDropEffects.None;
return;
}
}
else
{
if (!dropTarget.CanDrop(data))
{
e.Effects = DragDropEffects.None;
return;
}
}
if (((e.AllowedEffects & DragDropEffects.Move) == DragDropEffects.Move) &&
((e.AllowedEffects & DragDropEffects.Copy) == DragDropEffects.Copy) &&
data.SourceFunctionId.HasValue &&
data.SourceFunctionId.Value != editor.Function.Id)
{
e.Effects = DragDropEffects.Copy;
}
else if ((e.AllowedEffects & DragDropEffects.Move) == DragDropEffects.Move)
{
e.Effects = DragDropEffects.Move;
}
else if ((e.AllowedEffects & DragDropEffects.Copy) == DragDropEffects.Copy)
{
e.Effects = DragDropEffects.Copy;
}
if (drop)
{
if (dropTarget == null)
{
editor.Function.Drop(data, false);
}
else
{
dropTarget.Drop(data);
}
CurrentDropTarget = null;
}
else
{
CurrentDropTarget = dropTarget;
}
e.Handled = true;
});
}
