public void Drop(IDropInfo dropInfo)
{
bool stringFlag = false;
if (dropInfo.DragInfo == null && dropInfo.Data is IToolboxItem item && dropInfo.IsSameDragDropContextAsSource)
{
if (item.DataSource.Data.Format != DataFormats.Text)
{
return;
}
stringFlag = true;
}
if (dropInfo.IsSameDragDropContextAsSource && !stringFlag)
{
//Restore original data
dropInfo.Data = dropInfo.DragInfo.SourceItem;
}
if (stringFlag)
{
var destinationList = dropInfo.TargetCollection.TryGetList();
if (destinationList != null)
{
destinationList.Insert(dropInfo.InsertIndex, dropInfo.Data);
var selectDroppedItems = DragDrop.DragDrop.GetSelectDroppedItems(dropInfo.VisualTarget);
if (selectDroppedItems)
{
DefaultDropHandler.SelectDroppedItems(dropInfo, new List <object> {
dropInfo.Data
});
}
}
}
else
{
DragDrop.DragDrop.DefaultDropHandler.Drop(dropInfo);
}
}
/// <inheritdoc />
public void Drop(IDropInfo dropInfo)
{
var wrapper = GetSerializableWrapper(dropInfo);
if (wrapper == null || dropInfo.TargetCollection == null)
{
return;
}
// at this point the drag info can be null, cause the other app doesn't know it
var insertIndex = dropInfo.UnfilteredInsertIndex;
var destinationList = dropInfo.TargetCollection.TryGetList();
var data = wrapper.Items.ToList();
bool isSameCollection = false;
var copyData = ShouldCopyData(dropInfo, wrapper.DragDropCopyKeyState);
if (!copyData)
{
var sourceList = dropInfo.DragInfo?.SourceCollection?.TryGetList();
if (sourceList != null)
{
isSameCollection = sourceList.IsSameObservableCollection(destinationList);
if (!isSameCollection)
{
foreach (var o in data)
{
var index = sourceList.IndexOf(o);
if (index != -1)
{
sourceList.RemoveAt(index);
// so, is the source list the destination list too ?
if (destinationList != null && Equals(sourceList, destinationList) && index < insertIndex)
{
--insertIndex;
}
}
}
}
}
}
if (destinationList != null)
{
var objects2Insert = new List <object>();
// check for cloning
var cloneData = dropInfo.Effects.HasFlag(DragDropEffects.Copy) || dropInfo.Effects.HasFlag(DragDropEffects.Link);
foreach (var o in data)
{
var obj2Insert = o;
if (cloneData)
{
if (o is ICloneable cloneable)
{
obj2Insert = cloneable.Clone();
}
}
objects2Insert.Add(obj2Insert);
if (!cloneData && isSameCollection)
{
var index = destinationList.IndexOf(o);
if (index != -1)
{
if (insertIndex > index)
{
insertIndex--;
}
Move(destinationList, index, insertIndex++);
}
}
else
{
destinationList.Insert(insertIndex++, obj2Insert);
}
}
DefaultDropHandler.SelectDroppedItems(dropInfo, objects2Insert);
}
}