/// <summary>
/// Method called on Drop events</summary>
/// <param name="e">DragEventArgs containing event information</param>
protected override void OnDrop(DragEventArgs e)
{
object target = GetDropTarget(e);
if (!ApplicationUtil.CanInsert(AssociatedObject.DataContext, target, e.Data))
{
return;
}
IDataObject dataObject = e.Data;
if ((e.AllowedEffects & DragDropEffects.Copy) > 0 &&
(e.KeyStates & DragDropKeyStates.ControlKey) > 0)
{
var registry = Composer.Current.Container.GetExportedValueOrDefault <IContextRegistry>();
if (registry != null)
{
// Attempt to get context which was the source of this drag operation
var ctx = registry.GetActiveContext <IInstancingContext>();
if (ctx != null && ctx.CanCopy())
{
object rawObject = ctx.Copy();
dataObject = rawObject as IDataObject ?? new DataObject(rawObject);
}
}
}
var statusService = Composer.Current.Container.GetExportedValueOrDefault <IStatusService>();
ApplicationUtil.Insert(AssociatedObject.DataContext, target, dataObject, "Drag Drop".Localize(), statusService);
e.Effects = DragDropEffects.None;
e.Handled = true;
}
//private void CreateInsertionAdorner()
//{
// // var adornerLayer = AdornerLayer.GetAdornerLayer(this.targetItemContainer);
// // this.insertionAdorner = new InsertionAdorner(this.hasVerticalOrientation, this.isInFirstHalf, this.targetItemContainer, adornerLayer);
//}
/// <summary>
/// Method called on DragOver events</summary>
/// <param name="e">DragEventArgs containing event information</param>
protected override void OnDragOver(DragEventArgs e)
{
var source = (DependencyObject)e.OriginalSource;
FrameworkElement container = null;
var tv = AssociatedObject as TreeView;
if (tv != null)
{
container = source.FindAncestor <TreeViewItem>();
}
else
{
container = AssociatedObject.ContainerFromElement(source) as FrameworkElement;
}
object parentData = container != null ? container.DataContext : AssociatedObject.DataContext;
if (ApplicationUtil.CanInsert(AssociatedObject.DataContext, parentData, e.Data))
{
if ((e.AllowedEffects & DragDropEffects.Copy) > 0 &&
(e.KeyStates & DragDropKeyStates.ControlKey) > 0)
{
e.Effects = DragDropEffects.Copy;
}
else
{
e.Effects = DragDropEffects.Move;
}
e.Handled = true;
}
}
/// <summary>
/// Event fired when an item is dragged over the control</summary>
/// <param name="e">Event args</param>
protected override void OnDragOver(DragEventArgs e)
{
if (ApplicationUtil.CanInsert(AssociatedObject.DataContext, null, e.Data))
{
e.Effects = DragDropEffects.Move;
e.Handled = true;
}
}
/// <summary>
/// Event fired when an item is dropped onto the control</summary>
/// <param name="e">Event args</param>
protected override void OnDrop(DragEventArgs e)
{
if (ApplicationUtil.CanInsert(AssociatedObject.DataContext, null, e.Data))
{
var statusService = Composer.Current.Container.GetExportedValueOrDefault <IStatusService>();
ApplicationUtil.Insert(AssociatedObject.DataContext, null, e.Data, "Drag Drop".Localize(), statusService);
e.Effects = DragDropEffects.None;
e.Handled = true;
}
}
/// <summary>
/// Method called on DragOver events</summary>
/// <param name="e">DragEventArgs containing event information</param>
protected override void OnDragOver(DragEventArgs e)
{
int insertionIndex = AssociatedObject.Items.Count;
bool isInFirstHalf = false;
var source = (DependencyObject)e.OriginalSource;
FrameworkElement container = null;
var tv = AssociatedObject as TreeView;
if (tv != null)
{
container = source.FindAncestor <TreeViewItem>();
}
else
{
container = AssociatedObject.ContainerFromElement(source) as FrameworkElement;
}
if (container != null)
{
Point positionRelativeToItemContainer = e.GetPosition(container);
isInFirstHalf = IsInFirstHalf(container, positionRelativeToItemContainer, m_hasVerticalOrientation);
ItemsControl itemsControl = ItemsControl.ItemsControlFromItemContainer(container);
insertionIndex = itemsControl.ItemContainerGenerator.IndexFromContainer(container);
if (!isInFirstHalf)
{
insertionIndex++;
}
}
object parentData = container != null ? container.DataContext : AssociatedObject.DataContext;
if (ApplicationUtil.CanInsert(AssociatedObject.DataContext, parentData, e.Data))
{
if ((e.AllowedEffects & DragDropEffects.Copy) > 0 &&
(e.KeyStates & DragDropKeyStates.ControlKey) > 0)
{
e.Effects = DragDropEffects.Copy;
}
else
{
e.Effects = DragDropEffects.Move;
}
e.Handled = true;
}
}
/// <summary>
/// Handle Drop event</summary>
/// <param name="e">Drag event arguments</param>
protected override void OnDrop(DragEventArgs e)
{
var pos = e.GetPosition(AssociatedObject);
var parent = AssociatedObject.GetItemAtPoint(pos);
if (parent == null)
{
parent = AssociatedObject.DataContext;
}
if (ApplicationUtil.CanInsert(AssociatedObject.DataContext, parent, e.Data))
{
var statusService = Composer.Current.Container.GetExportedValueOrDefault <IStatusService>();
ApplicationUtil.Insert(AssociatedObject.DataContext, parent, e.Data, "Drag Drop".Localize(), statusService);
e.Effects = DragDropEffects.None;
e.Handled = true;
}
}
/// <summary>
/// Handle DragOver event</summary>
/// <param name="e">Drag event arguments</param>
protected override void OnDragOver(DragEventArgs e)
{
object target = GetDropTarget(e);
if (ApplicationUtil.CanInsert(AssociatedObject.DataContext, target, e.Data))
{
if ((e.AllowedEffects & DragDropEffects.Copy) > 0 &&
(e.KeyStates & DragDropKeyStates.ControlKey) > 0)
{
e.Effects = DragDropEffects.Copy;
}
else
{
e.Effects = DragDropEffects.Move;
}
}
else
{
e.Effects = DragDropEffects.None;
}
e.Handled = true;
}