Command.cs
上传用户:sxsgcs
上传日期:2013-10-21
资源大小:110k
文件大小:1k
- using System;
- using System.Collections.Generic;
- using System.Text;
- /// Undo-Redo code is written using the article:
- /// http://www.codeproject.com/cs/design/commandpatterndemo.asp
- // The Command Pattern and MVC Architecture
- // By David Veeneman.
- namespace DrawTools
- {
- /// <summary>
- /// Base class for commands used for Undo - Redo
- /// </summary>
- abstract class Command
- {
- // This function is used to make Undo operation.
- // It makes action opposite to the original command.
- public abstract void Undo(GraphicsList list);
- // This command is used to make Redo operation.
- // It makes original command again.
- public abstract void Redo(GraphicsList list);
- // Derived classes have members which contain enough information
- // to make Undo and Redo operations for every specific command.
- }
- }