/// <summary>
/// Raises event immediately before list item is moved and provides oppertunity to cancel.
/// </summary>
/// <param name="args">Event arguments.</param>
protected virtual void OnItemMoving(ItemMovingEventArgs args) {
if (ItemMoving != null)
ItemMoving(this, args);
}
/// <summary>
/// Move item from source index to destination index.
/// </summary>
/// <param name="adaptor">Reorderable list adaptor.</param>
/// <param name="sourceIndex">Zero-based index of source item.</param>
/// <param name="destIndex">Zero-based index of destination index.</param>
protected void MoveItem(IReorderableListAdaptor adaptor, int sourceIndex, int destIndex) {
// Raise event before moving item so that the operation can be cancelled.
var movingEventArgs = new ItemMovingEventArgs(adaptor, sourceIndex, destIndex);
OnItemMoving(movingEventArgs);
if (!movingEventArgs.Cancel) {
adaptor.Move(sourceIndex, destIndex);
// Item was actually moved!
int newIndex = destIndex;
if (newIndex > sourceIndex)
--newIndex;
OnItemMoved(new ItemMovedEventArgs(adaptor, sourceIndex, newIndex));
GUI.changed = true;
}
ReorderableListGUI.IndexOfChangedItem = -1;
}