|
public static RemoveItem ( |
||
| itemsControl | ||
| removeIndex | int | |
| return | void | |
private void DragStarted(ItemsControl itemsControl)
{
Type dataType = _data.GetType();
if (!(dataType.IsSubclassOf(ItemType) || dataType == ItemType || ItemType.IsAssignableFrom(dataType)))
{
return;
}
UIElement draggedItemContainer = Helper.GetItemContainerFromPoint(itemsControl, _dragStartPosition);
_isDragging = true;
DataObject dObject = new DataObject(ItemType, _data);
DragDropEffects e = System.Windows.DragDrop.DoDragDrop(itemsControl, dObject, DragDropEffects.Copy | DragDropEffects.Move);
if ((e & DragDropEffects.Move) != 0)
{
if (draggedItemContainer != null)
{
int dragItemIndex = itemsControl.ItemContainerGenerator.IndexFromContainer(draggedItemContainer);
Helper.RemoveItem(itemsControl, dragItemIndex);
}
else
{
Helper.RemoveItem(itemsControl, _data);
}
}
ResetState();
}
void itemsControl_PreviewDrop(object sender, DragEventArgs e)
{
ItemsControl itemsControl = (ItemsControl)sender;
DetachAdorners();
e.Handled = true;
if (e.Data.GetDataPresent(ItemType))
{
object itemToAdd = e.Data.GetData(ItemType);
if ((e.KeyStates & DragDropKeyStates.ControlKey) != 0 &&
Helper.DoesItemExists(itemsControl, itemToAdd))
{
if (MessageBox.Show("Item already exists. Do you want to overwrite it?", "Copy File",
MessageBoxButton.YesNo) == MessageBoxResult.Yes)
{
Helper.RemoveItem(itemsControl, itemToAdd);
}
else
{
e.Effects = DragDropEffects.None;
return;
}
}
e.Effects = ((e.KeyStates & DragDropKeyStates.ControlKey) != 0) ?
DragDropEffects.Copy : DragDropEffects.Move;
Helper.AddItem(itemsControl, itemToAdd, FindInsertionIndex(itemsControl, e));
}
else
{
e.Effects = DragDropEffects.None;
}
}
