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UndoRedoController.cs
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UndoRedoController.cs
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using System.Collections.Generic;
using System.Drawing;
namespace SchetsEditor
{
public class UndoRedoController
{
public List<DrawInstuction> UndoList = new List<DrawInstuction>();
public List<DrawInstuction> RedoList = new List<DrawInstuction>();
public void addInstruction(DrawInstuction instruction)
{
// Save the snapshot.
UndoList.Add(instruction);
// Empty the redo list.
if (RedoList.Count > 0)
{
RedoList = new List<DrawInstuction>();
}
}
public UndoRedoController(List<DrawInstuction> undo, List<DrawInstuction> redo)
{
UndoList = undo;
RedoList = redo;
}
public UndoRedoController() { }
public List<DrawInstuction> getElements()
{
return this.UndoList;
}
public DrawStorage getcurrentState(Size afmetingen, Bitmap backgroundImage = null)
{
//Bitmap backImage = (backgroundImage != null) ? backgroundImage : null;
return new DrawStorage(this.UndoList, this.RedoList, afmetingen, (backgroundImage != null) ? backgroundImage : null);
}
public List<DrawInstuction> undo()
{
// Move the most recent change to the redo list.
if (UndoList.Count != 0)
{
RedoList.Add(UndoList.Pop());
}
return UndoList.CustomReverse();
}
public List<DrawInstuction> redo()
{
// Move the most recently undone item back to the undo list.
if (RedoList.Count != 0)
{
UndoList.Add(RedoList.Pop());
}
return UndoList;
}
}
}