/*
* Greenshot - a free and open source screenshot tool
* Copyright (C) 2007-2015 Thomas Braun, Jens Klingen, Robin Krom
*
* For more information see: http://getgreenshot.org/
* The Greenshot project is hosted on Sourceforge: http://sourceforge.net/projects/greenshot/
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
using Greenshot.Drawing;
using Greenshot.Plugin.Drawing;
using System;
namespace Greenshot.Memento
{
///
/// The AddElementMemento makes it possible to undo adding an element
///
public class AddElementMemento : IMemento
{
private IDrawableContainer _drawableContainer;
private Surface _surface;
public AddElementMemento(Surface surface, IDrawableContainer drawableContainer)
{
_surface = surface;
_drawableContainer = drawableContainer;
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
//if (disposing) { }
_drawableContainer = null;
_surface = null;
}
public bool Merge(IMemento otherMemento)
{
return false;
}
public IMemento Restore()
{
// Before
_drawableContainer.Invalidate();
// Store the selected state, as it's overwritten by the RemoveElement
DeleteElementMemento oldState = new DeleteElementMemento(_surface, _drawableContainer);
_surface.RemoveElement(_drawableContainer, false);
_drawableContainer.Selected = true;
// After
_drawableContainer.Invalidate();
return oldState;
}
}
}