svn-gvsig-desktop / tags / J2ME_compat_v1_2_Build_1209 / libraries / libFMap / src / com / iver / cit / gvsig / fmap / edition / commands / MemoryCommandRecord.java @ 19509
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1 | 19509 | jcarrasco | /* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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2 | *
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3 | * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version 2
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8 | * of the License, or (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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18 | *
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19 | * For more information, contact:
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20 | *
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21 | * Generalitat Valenciana
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22 | * Conselleria d'Infraestructures i Transport
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23 | * Av. Blasco Ib??ez, 50
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24 | * 46010 VALENCIA
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25 | * SPAIN
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26 | *
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27 | * +34 963862235
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28 | * gvsig@gva.es
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29 | * www.gvsig.gva.es
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30 | *
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31 | * or
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32 | *
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33 | * IVER T.I. S.A
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34 | * Salamanca 50
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35 | * 46005 Valencia
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36 | * Spain
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37 | *
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38 | * +34 963163400
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39 | * dac@iver.es
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40 | */
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41 | package com.iver.cit.gvsig.fmap.edition.commands; |
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42 | |||
43 | import java.io.IOException; |
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44 | import java.util.ArrayList; |
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45 | import java.util.Stack; |
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46 | |||
47 | import com.iver.cit.gvsig.exceptions.commands.EditionCommandException; |
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48 | import com.iver.cit.gvsig.fmap.drivers.DriverIOException; |
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49 | |||
50 | |||
51 | /**
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52 | * Clase en memoria para registrar y gestionar los comandos que vamos
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53 | * realizando. La forma en que ha sido implementada esta clase, en vez de una
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54 | * ?nica lista para albergar los comandos de deshacer(undos) y los de
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55 | * rehacer(redos), se ha optado por dos pilas una para deshacer(undos) y otra
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56 | * para rehacer(redos), de esta forma : Cuando se a?ade un nuevo comando, se
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57 | * inserta este a la pila de deshacer(undos) y se borra de la de
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58 | * rehacer(redos). Si se realiza un deshacer se desapila este comando de la
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59 | * pila deshacer(undos) y se apila en la de rehacer(redos). Y de la misma
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60 | * forma cuando se realiza un rehacer se desapila este comando de la pila de
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61 | * rehacer(redos) y pasa a la de deshacer(undos).
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62 | *
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63 | * @author Vicente Caballero Navarro
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64 | */
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65 | public class MemoryCommandRecord implements CommandRecord { |
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66 | private Stack undos = new Stack(); |
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67 | private Stack redos = new Stack(); |
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68 | private ArrayList commandsListener=new ArrayList(); |
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69 | private boolean refresh=true; |
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70 | private int undosCount=0; |
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71 | |||
72 | /**
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73 | * A?ade el comando a la pila de deshacer y borra todo el contenido de la
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74 | * pila rehacer.
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75 | *
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76 | * @param command Comando a a?adir.
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77 | *
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78 | * @throws IOException
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79 | * @throws DriverIOException
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80 | *
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81 | * @see com.iver.cit.gvsig.fmap.edition.CommandRecord#addCommand(com.iver.cit.gvsig.fmap.edition.Command)
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82 | */
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83 | public void pushCommand(Command command){ |
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84 | undos.add(command); |
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85 | redos.clear(); |
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86 | refresh=true;
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87 | fireCommandRefresh(); |
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88 | } |
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89 | |||
90 | /**
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91 | * Realiza la operaci?n del ?ltimo comando de deshacer y lo apila en los de
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92 | * rehacer.
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93 | * @throws EditionCommandException
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94 | *
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95 | * @throws DriverIOException
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96 | * @throws IOException
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97 | *
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98 | * @see com.iver.cit.gvsig.fmap.edition.CommandRecord#delCommand(com.iver.cit.gvsig.fmap.edition.Command)
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99 | */
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100 | public void undoCommand() throws EditionCommandException { |
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101 | Command command = (Command) undos.pop(); |
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102 | command.undo(); |
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103 | redos.add(command); |
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104 | fireCommandsRepaint(new CommandEvent(command));
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105 | } |
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106 | |||
107 | /**
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108 | * Realiza la operaci?n de rehacer el ?ltimo comando apilado y lo a?ade a
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109 | * la pila deshacer.
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110 | *
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111 | * @throws DriverIOException
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112 | * @throws IOException
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113 | *
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114 | * @see com.iver.cit.gvsig.fmap.edition.CommandRecord#redoCommand()
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115 | */
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116 | public void redoCommand() throws EditionCommandException { |
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117 | Command command = (Command) redos.pop(); |
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118 | command.redo(); |
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119 | undos.add(command); |
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120 | fireCommandsRepaint(new CommandEvent(command));
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121 | } |
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122 | |||
123 | /**
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124 | * @see com.iver.cit.gvsig.fmap.edition.CommandRecord#moreUndoCommands()
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125 | */
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126 | public boolean moreUndoCommands() { |
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127 | return (!undos.isEmpty());
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128 | } |
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129 | |||
130 | /**
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131 | * @see com.iver.cit.gvsig.fmap.edition.CommandRecord#moreRedoCommands()
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132 | */
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133 | public boolean moreRedoCommands() { |
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134 | return (!redos.isEmpty());
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135 | } |
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136 | public Command[] getUndoCommands(){ |
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137 | Stack clonedUndos=(Stack)undos.clone(); |
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138 | |||
139 | ArrayList commands=new ArrayList(); |
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140 | while (!clonedUndos.isEmpty()){
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141 | commands.add(clonedUndos.pop()); |
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142 | } |
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143 | |||
144 | return (Command[])commands.toArray(new Command[0]); |
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145 | } |
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146 | public Command[] getRedoCommands(){ |
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147 | Stack clonedRedos=(Stack)redos.clone(); |
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148 | |||
149 | ArrayList commands=new ArrayList(); |
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150 | while (!clonedRedos.isEmpty()){
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151 | commands.add(clonedRedos.pop()); |
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152 | } |
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153 | return (Command[])commands.toArray(new Command[0]); |
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154 | } |
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155 | public int getPos(){ |
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156 | if (refresh){
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157 | undosCount=undos.size()-1;
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158 | } |
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159 | return undosCount;
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160 | } |
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161 | public void setPos(int newpos) throws EditionCommandException{ |
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162 | int pos=getPos();
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163 | if (newpos>pos){
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164 | for (int i=pos;i<newpos;i++){ |
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165 | redoCommand(); |
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166 | System.out.println("redos = "+i); |
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167 | } |
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168 | }else if (pos>newpos){ |
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169 | for (int i=pos-1;i>=newpos;i--){ |
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170 | undoCommand(); |
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171 | System.out.println("undos = "+i); |
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172 | } |
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173 | } |
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174 | } |
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175 | |||
176 | public void addCommandListener(CommandListener cl) { |
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177 | if (!commandsListener.contains(cl))
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178 | commandsListener.add(cl); |
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179 | } |
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180 | |||
181 | public void fireCommandsRepaint(CommandEvent e) { |
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182 | for (int i=0;i<commandsListener.size();i++){ |
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183 | ((CommandListener)commandsListener.get(i)).commandRepaint(); |
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184 | } |
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185 | } |
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186 | public void fireCommandRefresh(){ |
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187 | for (int i=0;i<commandsListener.size();i++){ |
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188 | ((CommandListener)commandsListener.get(i)).commandRefresh(); |
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189 | } |
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190 | } |
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191 | |||
192 | public int getCommandCount() { |
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193 | return undos.size()+redos.size();
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194 | } |
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195 | |||
196 | public void removeCommandListener(CommandListener e) { |
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197 | commandsListener.remove(e); |
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198 | } |
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199 | |||
200 | public void clearAll() { |
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201 | redos.clear(); |
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202 | undos.clear(); |
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203 | |||
204 | } |
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205 | } |