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70 lines
1.9 KiB
C#
70 lines
1.9 KiB
C#
/*
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* Greenshot - a free and open source screenshot tool
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* Copyright (C) 2007-2020 Thomas Braun, Jens Klingen, Robin Krom
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*
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* For more information see: http://getgreenshot.org/
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* The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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using Greenshot.Drawing;
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using GreenshotPlugin.Interfaces.Drawing;
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namespace Greenshot.Memento
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{
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/// <summary>
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/// The DeleteElementMemento makes it possible to undo deleting an element
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/// </summary>
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public class DeleteElementsMemento : IMemento
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{
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private IDrawableContainerList _containerList;
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private Surface _surface;
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public DeleteElementsMemento(Surface surface, IDrawableContainerList containerList)
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{
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_surface = surface;
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_containerList = containerList;
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}
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public void Dispose()
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{
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Dispose(true);
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}
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protected virtual void Dispose(bool disposing)
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{
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if (disposing)
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{
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_containerList?.Dispose();
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}
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_containerList = null;
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_surface = null;
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}
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public bool Merge(IMemento otherMemento)
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{
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return false;
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}
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public IMemento Restore()
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{
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AddElementsMemento oldState = new AddElementsMemento(_surface, _containerList);
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_surface.AddElements(_containerList, false);
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// After
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_surface.Invalidate();
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return oldState;
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}
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}
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}
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