/// <summary>
/// Sets this <see cref="PhysicalWorkspace"/> with a previously created memento.
/// </summary>
/// <param name="memento">Memento to set.</param>
/// <remarks>
/// This method restores the state of a <see cref="PhysicalWorkspace"/> with
/// a memento previously created by <see cref="CreateMemento"/>.
/// </remarks>
public virtual void SetMemento(object memento)
{
Platform.CheckForNullReference(memento, "memento");
PhysicalWorkspaceMemento workspaceMemento = (PhysicalWorkspaceMemento)memento;
//locked is not part of the memento.
bool locked = Locked;
SetLocked(false);
this.ImageBoxes.Clear();
for (int i = 0; i < workspaceMemento.ImageBoxes.Count; i++)
{
object imageBoxMemento = workspaceMemento.ImageBoxMementos[i];
IImageBox imageBox = workspaceMemento.ImageBoxes[i];
imageBox.SetMemento(imageBoxMemento);
this.ImageBoxes.Add(imageBox);
}
_rows = workspaceMemento.Rows;
_columns = workspaceMemento.Columns;
SetImageBoxGrid();
//restore locked state.
SetLocked(locked);
OnLayoutCompleted();
//The command in the command history should be drawable.
//Draw();
}
/// <summary>
/// Creates a memento for this <see cref="PhysicalWorkspace"/>.
/// </summary>
/// <returns>A memento for this <see cref="PhysicalWorkspace"/>.</returns>
/// <remarks>
/// This method is used to remember the current state of a
/// <see cref="PhysicalWorkspace"/>. The memento remembers the actual <see cref="ImageBox"/>
/// <i>instances</i> contained in the <see cref="PhysicalWorkspace"/>. Calling
/// <see cref="SetMemento"/> at a later time restores
/// those instances.
/// </remarks>
public virtual object CreateMemento()
{
List <object> imageBoxMementos = new List <object>();
foreach (ImageBox imageBox in this.ImageBoxes)
{
imageBoxMementos.Add(imageBox.CreateMemento());
}
PhysicalWorkspaceMemento workspaceMemento =
new PhysicalWorkspaceMemento(new ImageBoxCollection(this.ImageBoxes),
imageBoxMementos,
this.Rows,
this.Columns);
return(workspaceMemento);
}