/// <summary>
/// Raises the <see cref="E:ReorderingCompleted" /> event.
/// </summary>
/// <param name="reorderActionCompletedEventArgs">The <see cref="ReorderActionCompletedEventArgs" /> instance containing the event data.</param>
protected virtual void OnReorderingCompleted(ReorderActionCompletedEventArgs reorderActionCompletedEventArgs)
{
if (this.ReorderingCompleted != null)
{
this.ReorderingCompleted(this, reorderActionCompletedEventArgs);
}
}
/// <summary>
/// Hides any drop-indicators that are currently visible.
/// </summary>
private void ClearDropTarget()
{
foreach (ReorderListBoxItem itemContainer in this.itemsPanel.Children)
{
VisualStateManager.GoToState(itemContainer, ReorderListBoxItem.NoDropIndicatorState, false);
itemContainer.Tag = null;
}
reorderActionCompletedEventArgs = null;
}
/// <summary>
/// Updates the targeted index -- that is the index where the item will be moved to if dropped at this point.
/// </summary>
private void UpdateDropTargetIndex(ReorderListBoxItem targetItemContainer, bool after)
{
int dragItemIndex = this.Items.IndexOf(this.dragItem);
int targetItemIndex = this.Items.IndexOf(targetItemContainer.Content);
int newDropTargetIndex;
if (targetItemIndex == dragItemIndex)
{
newDropTargetIndex = dragItemIndex;
}
else
{
newDropTargetIndex = targetItemIndex + (after ? 1 : 0) - (targetItemIndex >= dragItemIndex ? 1 : 0);
}
if (newDropTargetIndex != this.dropTargetIndex)
{
reorderActionCompletedEventArgs = new ReorderActionCompletedEventArgs();
reorderActionCompletedEventArgs.OriginalIndex = dragItemIndex;
reorderActionCompletedEventArgs.TargetIndex = newDropTargetIndex;
reorderActionCompletedEventArgs.OriginalSource = this.dragItem;
reorderActionCompletedEventArgs.TargetObject = targetItemContainer.Content;
reorderActionCompletedEventArgs.Orinentation = after ? MovingOrientation.Down : MovingOrientation.Up;
if (dragItemIndex == newDropTargetIndex)
{
reorderActionCompletedEventArgs.Orinentation = MovingOrientation.None;
}
this.dropTargetIndex = newDropTargetIndex;
}
}
