svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.mapcontext / org.gvsig.fmap.mapcontext.api / src / main / java / org / gvsig / fmap / mapcontext / layers / LayerChangeSupport.java @ 42811
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | 40435 | jjdelcerro | *
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4 | 40559 | jjdelcerro | * Copyright (C) 2007-2013 gvSIG Association.
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5 | 40435 | jjdelcerro | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | 40559 | jjdelcerro | * as published by the Free Software Foundation; either version 3
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9 | 40435 | jjdelcerro | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | 40559 | jjdelcerro | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | 40435 | jjdelcerro | *
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21 | 40559 | jjdelcerro | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | 40435 | jjdelcerro | */
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24 | package org.gvsig.fmap.mapcontext.layers; |
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25 | |||
26 | 42800 | jjdelcerro | import java.util.HashSet; |
27 | import java.util.Set; |
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28 | 40435 | jjdelcerro | |
29 | import org.gvsig.fmap.mapcontext.rendering.legend.events.LegendChangedEvent; |
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30 | import org.gvsig.fmap.mapcontext.rendering.legend.events.listeners.LegendListener; |
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31 | 42811 | jjdelcerro | import org.slf4j.Logger; |
32 | import org.slf4j.LoggerFactory; |
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33 | 40435 | jjdelcerro | |
34 | |||
35 | |||
36 | /**
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37 | * <p>Manages all legend listeners of a layer, notifying them any legend change event produced.</p>
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38 | *
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39 | */
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40 | public class LayerChangeSupport { |
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41 | 42811 | jjdelcerro | private static final Logger logger = LoggerFactory.getLogger(LayerChangeSupport.class); |
42 | 40435 | jjdelcerro | /**
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43 | * <p>The legend listeners of a layer.</p>
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44 | */
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45 | 42800 | jjdelcerro | private final Set<LegendListener> listeners = new HashSet<>(); |
46 | 40435 | jjdelcerro | |
47 | /**
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48 | * <p>Registers a <code>LegendListener</code>.</p>
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49 | *
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50 | * @param listener the legend listener
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51 | */
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52 | public void addLayerListener(LegendListener listener) { |
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53 | 42811 | jjdelcerro | if( listener == null ) { |
54 | return;
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55 | } |
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56 | listeners.add(listener); |
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57 | 40435 | jjdelcerro | } |
58 | |||
59 | /**
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60 | * <p>Removes a registered <code>LegendListener</code>.</p>
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61 | *
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62 | * @param listener the legend listener
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63 | */
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64 | public void removeLayerListener(LegendListener listener) { |
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65 | listeners.remove(listener); |
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66 | } |
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67 | |||
68 | /**
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69 | * <p>Notifies a legend change to all legend listeners registered.</p>
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70 | *
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71 | * @param e a legend event with the new legend and events that compound this one
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72 | */
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73 | public void callLegendChanged(LegendChangedEvent e) { |
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74 | 42800 | jjdelcerro | for (LegendListener listener : listeners) {
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75 | 42811 | jjdelcerro | try {
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76 | listener.legendChanged(e); |
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77 | } catch(Exception ex) { |
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78 | logger.warn("Error calling listener '"+listener.toString()+"'.",ex); |
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79 | } |
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80 | 42800 | jjdelcerro | } |
81 | 40435 | jjdelcerro | } |
82 | } |