svn-gvsig-desktop / branches / v2_0_0_prep / libraries / libFMap_mapcontext / src / org / gvsig / fmap / mapcontext / layers / LayerCollectionEvent.java @ 37835
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1 | 21200 | vcaballero | /* 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 org.gvsig.fmap.mapcontext.layers; |
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42 | |||
43 | import org.gvsig.fmap.mapcontext.events.FMapEvent; |
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44 | |||
45 | |||
46 | /**
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47 | * <p>Event produced when a layer is been added or removed, or has been added or
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48 | * removed, or its visibility or activation state has changed from a collection of layers.</p>
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49 | *
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50 | * @author Vicente Caballero Navarro
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51 | */
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52 | public class LayerCollectionEvent extends FMapEvent { |
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53 | /**
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54 | * <p>Identifies this event as a action on a layer that has been added.</p>
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55 | */
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56 | private final static int LAYER_ADDED = 0; |
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57 | |||
58 | /**
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59 | * <p>Identifies this event as a action on a layer that has been removed.</p>
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60 | */
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61 | private final static int LAYER_REMOVED = 2; |
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62 | |||
63 | /**
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64 | * <p>Identifies this event as a action on a layer that is being added.</p>
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65 | */
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66 | private final static int LAYER_ADDING = 3; |
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67 | |||
68 | /**
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69 | * <p>Identifies this event as a action on a layer that is being removed.</p>
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70 | */
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71 | private final static int LAYER_REMOVING = 5; |
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72 | |||
73 | /**
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74 | * <p>Identifies this event as a action of change of the activation status of a layer.</p>
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75 | */
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76 | private final static int LAYER_ACTIVATION_CHANGED = 6; |
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77 | |||
78 | /**
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79 | * <p>Identifies this event as a action of change of the visibility status of a layer.</p>
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80 | */
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81 | private final static int LAYER_VISIBILITY_CHANGED = 7; |
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82 | |||
83 | /**
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84 | * <p>Reference to the collection of layers.</p>
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85 | */
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86 | private FLayers layers;
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87 | |||
88 | /**
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89 | * <p>Reference to the layer which this layer notifies.</p>
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90 | */
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91 | private FLayer affected;
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92 | |||
93 | /**
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94 | * <p>Creates a new layer collection event notifying a "layer added" action.</p>
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95 | *
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96 | * @param lyr layer affected by the action
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97 | *
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98 | * @return a new layer collection event
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99 | */
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100 | public static LayerCollectionEvent createLayerAddedEvent(FLayer lyr){ |
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101 | return new LayerCollectionEvent(lyr, LAYER_ADDED); |
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102 | } |
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103 | |||
104 | /**
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105 | * <p>Creates a new layer collection event notifying a "layer removed" action.</p>
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106 | *
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107 | * @param lyr layer affected by the action
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108 | *
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109 | * @return a new layer collection event
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110 | */
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111 | public static LayerCollectionEvent createLayerRemovedEvent(FLayer lyr){ |
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112 | return new LayerCollectionEvent(lyr, LAYER_REMOVED); |
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113 | } |
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114 | |||
115 | /**
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116 | * <p>Creates a new layer collection event notifying a "layer adding" action.</p>
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117 | *
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118 | * @param lyr layer affected by the action
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119 | *
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120 | * @return a new layer collection event
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121 | */
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122 | public static LayerCollectionEvent createLayerAddingEvent(FLayer lyr){ |
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123 | return new LayerCollectionEvent(lyr, LAYER_ADDING); |
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124 | } |
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125 | |||
126 | /**
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127 | * <p>Creates a new layer collection event notifying a "layer removing" action.</p>
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128 | *
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129 | * @param lyr layer affected by the action
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130 | *
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131 | * @return a new layer collection event
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132 | */
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133 | public static LayerCollectionEvent createLayerRemovingEvent(FLayer lyr){ |
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134 | return new LayerCollectionEvent(lyr, LAYER_REMOVING); |
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135 | } |
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136 | |||
137 | /**
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138 | * <p>Creates a new layer collection event notifying a "layer activation changed" action.</p>
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139 | *
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140 | * @param lyr layer affected by the action
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141 | *
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142 | * @return a new layer collection event
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143 | */
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144 | public static LayerCollectionEvent createLayerActivationEvent(FLayer lyr){ |
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145 | return new LayerCollectionEvent(lyr, LAYER_ACTIVATION_CHANGED); |
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146 | } |
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147 | |||
148 | /**
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149 | * <p>Creates a new layer collection event notifying a "layer visibility changed" action.</p>
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150 | *
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151 | * @param lyr layer affected by the action
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152 | *
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153 | * @return a new layer collection event
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154 | */
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155 | public static LayerCollectionEvent createLayerVisibilityEvent(FLayer lyr){ |
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156 | return new LayerCollectionEvent(lyr, LAYER_VISIBILITY_CHANGED); |
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157 | } |
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158 | |||
159 | /**
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160 | * <p>Creates a new layer collection event of the specified type.</p>
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161 | *
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162 | * @param lyr layer affected by the action
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163 | * @param eventType type of layer collection event
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164 | *
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165 | * @return a new layer collection event
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166 | */
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167 | protected LayerCollectionEvent(FLayer lyr, int eventType) { |
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168 | layers = lyr.getParentLayer(); |
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169 | affected = lyr; |
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170 | setEventType(eventType); |
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171 | } |
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172 | |||
173 | /**
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174 | * <p>Gets the collection of layers which the layer affected belongs.</p>
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175 | *
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176 | * @return the collection of layers affected
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177 | */
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178 | public FLayers getLayers() {
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179 | return layers;
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180 | } |
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181 | |||
182 | /**
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183 | * <p>Gets the layer that this event references.</p>
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184 | *
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185 | * @return the layer that this event references
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186 | */
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187 | public FLayer getAffectedLayer() {
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188 | return affected;
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189 | } |
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190 | } |