/* ----------------------------------------------------------------- */
///
/// MoveNext
///
/// <summary>
/// Moves selected items according to the specified condition.
/// </summary>
///
/* ----------------------------------------------------------------- */
private static void MoveNext(this MainFacade src, DragDropObject obj)
{
var delta = obj.DropIndex - obj.DragIndex;
var n = src.Value.Images.Selection.Indices
.Where(i => i > obj.DragIndex && i <= obj.DropIndex).Count();
src.Move(delta - n);
}
/* ----------------------------------------------------------------- */
///
/// MovePrevious
///
/// <summary>
/// Moves selected items accoding to the specified condition.
/// </summary>
///
/// <param name="src">Facade object.</param>
/// <param name="obj">Drag&Drop result.</param>
///
/* ----------------------------------------------------------------- */
private static void MovePrevious(this MainFacade src, DragDropObject obj)
{
var delta = obj.DropIndex - obj.DragIndex;
var n = src.Bindable.Images.Selection.Indices
.Where(i => i < obj.DragIndex && i >= obj.DropIndex).Count();
src.Move(delta + n);
}
/* ----------------------------------------------------------------- */
///
/// InsertOrMove
///
/// <summary>
/// Inserts or moves the specified pages according to the specified
/// condition.
/// </summary>
///
/// <param name="src">Source object.</param>
/// <param name="obj">Drag&Drop result.</param>
///
/* ----------------------------------------------------------------- */
public static void InsertOrMove(this MainFacade src, DragDropObject obj)
{
if (!obj.IsCurrentProcess)
{
var index = Math.Min(obj.DropIndex + 1, src.Value.Count);
src.Insert(index, obj.Pages);
}
else if (obj.DragIndex < obj.DropIndex)
{
src.MoveNext(obj);
}
else
{
src.MovePrevious(obj);
}
}