root / branches / FMap_CAD / libraries / libFMap / src / com / iver / cit / gvsig / fmap / edition / MemoryCommandRecord.java @ 3513
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.gvsig.fmap.edition; |
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import com.iver.cit.gvsig.fmap.drivers.DriverIOException; |
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import java.io.IOException; |
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import java.util.Stack; |
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/**
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* Clase en memoria para registrar y gestionar los comandos que vamos
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* realizando. La forma en que ha sido implementada esta clase, en vez de una
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* ?nica lista para albergar los comandos de deshacer(undos) y los de
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* rehacer(redos), se ha optado por dos pilas una para deshacer(undos) y otra
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* para rehacer(redos), de esta forma : Cuando se a?ade un nuevo comando, se
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* inserta este a la pila de deshacer(undos) y se borra de la de
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* rehacer(redos). Si se realiza un deshacer se desapila este comando de la
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* pila deshacer(undos) y se apila en la de rehacer(redos). Y de la misma
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* forma cuando se realiza un rehacer se desapila este comando de la pila de
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* rehacer(redos) y pasa a la de deshacer(undos).
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*
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* @author Vicente Caballero Navarro
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*/
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public class MemoryCommandRecord implements CommandRecord { |
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Stack undos = new Stack(); |
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Stack redos = new Stack(); |
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/**
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* A?ade el comando a la pila de deshacer y borra todo el contenido de la
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* pila rehacer.
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*
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* @param command Comando a a?adir.
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*
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* @throws IOException
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* @throws DriverIOException
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*
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* @see com.iver.cit.gvsig.fmap.edition.CommandRecord#addCommand(com.iver.cit.gvsig.fmap.edition.Command)
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*/
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public void pushCommand(Command command) |
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throws IOException, DriverIOException { |
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undos.add(command); |
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redos.clear(); |
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} |
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/**
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* Realiza la operaci?n del ?ltimo comando de deshacer y lo apila en los de
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* rehacer.
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*
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* @throws DriverIOException
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* @throws IOException
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*
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* @see com.iver.cit.gvsig.fmap.edition.CommandRecord#delCommand(com.iver.cit.gvsig.fmap.edition.Command)
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*/
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public void undoCommand() throws DriverIOException, IOException { |
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Command command = (Command) undos.pop(); |
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command.undo(); |
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redos.add(command); |
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} |
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/**
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* Realiza la operaci?n de rehacer el ?ltimo comando apilado y lo a?ade a
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* la pila deshacer.
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*
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* @throws DriverIOException
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* @throws IOException
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*
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* @see com.iver.cit.gvsig.fmap.edition.CommandRecord#redoCommand()
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*/
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public void redoCommand() throws DriverIOException, IOException { |
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Command command = (Command) redos.pop(); |
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command.redo(); |
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undos.add(command); |
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.edition.CommandRecord#moreUndoCommands()
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*/
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public boolean moreUndoCommands() { |
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return (!undos.isEmpty());
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.edition.CommandRecord#moreRedoCommands()
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*/
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public boolean moreRedoCommands() { |
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return (!redos.isEmpty());
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} |
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} |