public static void SetHasBindableSelectedItems(ListBox source, bool value)
{
SelectionChangedHandler Handler = (SelectionChangedHandler)source.GetValue(SelectionChangedHandlerProperty);
if (value && Handler == null)
{
Handler = new SelectionChangedHandler(source);
source.SetValue(SelectionChangedHandlerProperty, Handler);
}
else if (!value && Handler != null)
{ source.ClearValue(SelectionChangedHandlerProperty); }
}
public static void SetHasBindableSelectedItems(System.Windows.Controls.ListBox source, bool value)
{
var handler = (SelectionChangedHandler)source.GetValue(SelectionChangedHandlerProperty);
if (value && handler == null)
{
handler = new SelectionChangedHandler(source);
source.SetValue(SelectionChangedHandlerProperty, handler);
}
else if (!value && handler != null)
{
source.ClearValue(SelectionChangedHandlerProperty);
}
}
private void DragStarted(ListBox listbox)
{
listbox.ClearValue(IsDownProperty); // SetValue to false would also work.
// Add the bound item, available as DraggingElement, to a DataObject, however we see fit.
Artist draggingElement = (Artist)listbox.GetValue(DraggingElementProperty);
DataObject d = new DataObject(DataFormats.Dif, draggingElement);
DragDropEffects effects = DragDrop.DoDragDrop(listbox, d, DragDropEffects.Copy);
if ((effects & DragDropEffects.Move) != 0)
{
// Move rather than copy, so we should remove from bound list.
DataList<Artist> collection = (DataList<Artist>)listbox.ItemsSource;
collection.Remove(draggingElement);
}
}
