/// <summary>
/// Sets this <see cref="ImageBox"/> with a previously created memento.
/// </summary>
/// <param name="memento">Memento to set.</param>
/// <remarks>
/// This method restores the state of a <see cref="ImageBox"/> with
/// a memento previously created by <see cref="ImageBox.CreateMemento"/>.
/// </remarks>
public virtual void SetMemento(object memento)
{
Platform.CheckForNullReference(memento, "memento");
ImageBoxMemento imageBoxMemento = (ImageBoxMemento)memento;
if (imageBoxMemento.Rows != this.Rows || imageBoxMemento.Columns != this.Columns)
{
_rows = 0;
_columns = 0;
if (imageBoxMemento.Rows > 0 && imageBoxMemento.Columns > 0)
{
this.SetTileGrid(imageBoxMemento.Rows, imageBoxMemento.Columns);
}
}
_normalizedRectangle = RectangleF.Empty;
DisplaySetLocked = false;
this.DisplaySet = imageBoxMemento.DisplaySet;
if (this.DisplaySet != null)
{
this.DisplaySet.SetMemento(imageBoxMemento.DisplaySetMemento);
}
this.DisplaySetLocked = imageBoxMemento.DisplaySetLocked;
this.NormalizedRectangle = imageBoxMemento.NormalizedRectangle;
if (imageBoxMemento.TopLeftPresentationImageIndex != -1)
{
this.TopLeftPresentationImageIndex = imageBoxMemento.TopLeftPresentationImageIndex;
}
if (imageBoxMemento.IndexOfSelectedTile != -1)
{
ITile selectedTile = this.Tiles[imageBoxMemento.IndexOfSelectedTile];
selectedTile.Select();
}
}
/// <summary>
/// Creates a memento for this <see cref="ImageBox"/>.
/// </summary>
/// <returns>A memento for this <see cref="ImageBox"/>.</returns>
/// <remarks>
/// This method is used to remember the current state of a
/// <see cref="ImageBox"/>. The memento remembers the actual <see cref="Tile"/>
/// <i>instances</i> contained in the <see cref="ImageBox"/>. Calling
/// <see cref="ImageBox.SetMemento"/> at a later time restores those instances.
/// </remarks>
public virtual object CreateMemento()
{
object displaySetMemento = null;
if (this.DisplaySet != null)
{
displaySetMemento = this.DisplaySet.CreateMemento();
}
ImageBoxMemento imageBoxMemento =
new ImageBoxMemento(this.DisplaySet,
this.DisplaySetLocked,
displaySetMemento,
this.Rows,
this.Columns,
this.TopLeftPresentationImageIndex,
this.NormalizedRectangle,
this.IndexOfSelectedTile);
return(imageBoxMemento);
}