Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/map/FloodMap.java @ 1448:c39aa5a6478c

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#409 Made layer list and map layers synchron. flys-client/trunk@3465 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 19 Dec 2011 14:58:24 +0000
parents 3f6d2f18ee7b
children 3e2ef8e0a0dc
rev   line source
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cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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1 package de.intevation.flys.client.client.ui.map;
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2
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9aa1a453eed5 Issue 294.
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3
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4 import org.gwtopenmaps.openlayers.client.Bounds;
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5 import org.gwtopenmaps.openlayers.client.Map;
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6 import org.gwtopenmaps.openlayers.client.MapOptions;
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7 import org.gwtopenmaps.openlayers.client.MapWidget;
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8 import org.gwtopenmaps.openlayers.client.Style;
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9 import org.gwtopenmaps.openlayers.client.control.ScaleLine;
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10 import org.gwtopenmaps.openlayers.client.control.ScaleLineOptions;
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11 import org.gwtopenmaps.openlayers.client.event.VectorFeatureAddedListener;
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12 import org.gwtopenmaps.openlayers.client.event.VectorFeatureAddedListener.FeatureAddedEvent;
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13 import org.gwtopenmaps.openlayers.client.feature.VectorFeature;
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14 import org.gwtopenmaps.openlayers.client.format.GeoJSON;
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15 import org.gwtopenmaps.openlayers.client.layer.Layer;
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16 import org.gwtopenmaps.openlayers.client.layer.Vector;
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17 import org.gwtopenmaps.openlayers.client.layer.VectorOptions;
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18 import org.gwtopenmaps.openlayers.client.util.Attributes;
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19 import org.gwtopenmaps.openlayers.client.util.JObjectArray;
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20 import org.gwtopenmaps.openlayers.client.util.JSObject;
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21 import org.gwtopenmaps.openlayers.client.LonLat;
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22
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23
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24 public class FloodMap implements VectorFeatureAddedListener {
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26 public static final String LAYER_BARRIERS = "vector_layer_barriers";
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27
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28 public static final String MARK_SELECTED = "mark.selected";
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29
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30 public static final int SELECTED_STROKE_WIDTH = 2;
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32 protected MapWidget mapWidget;
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33 protected Map map;
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34 protected Vector barrierLayer;
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35 protected String srid;
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36 protected Bounds maxExtent;
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38
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39 public FloodMap(String srid, Bounds maxExtent) {
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40 this.srid = srid;
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41 this.maxExtent = maxExtent;
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42
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43 MapOptions opts = new MapOptions();
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44 opts.setControls(new JObjectArray(new JSObject[] {}));
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45 opts.setNumZoomLevels(16);
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46 opts.setProjection(getRiverProjection());
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47 opts.setMaxExtent(maxExtent);
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48 opts.setUnits("m");
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49 opts.setMaxResolution(500); // TODO DO THIS ON THE FLY
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50
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51 mapWidget = new MapWidget("510px", "635px", opts);
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52 map = mapWidget.getMap();
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53
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54 ScaleLineOptions slOpts = new ScaleLineOptions();
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55 slOpts.setBottomInUnits("m");
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56 slOpts.setBottomOutUnits("km");
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57 slOpts.setTopInUnits("");
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58 slOpts.setTopOutUnits("");
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59
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60 map.addControl(new ScaleLine(slOpts));
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61
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62 getBarrierLayer();
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63 }
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65
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66 @Override
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67 public void onFeatureAdded(FeatureAddedEvent evt) {
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68 VectorFeature feature = evt.getVectorFeature();
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69
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70 Attributes attrs = feature.getAttributes();
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71 String type = attrs.getAttributeAsString("typ");
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72
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73 if (type == null || type.length() == 0) {
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74 return;
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75 }
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76
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77 Style style = getStyle(type);
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78 if (style != null) {
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79 feature.setStyle(style);
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80 }
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81
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82 // necessary, otherwise the setStyle() has no effect
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83 barrierLayer.redraw();
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84 }
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85
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86
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87 /**
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88 * Returns an OpenLayers.Style based on a given type.
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89 *
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90 * @param type Type can be one of "pipe1", "pipe2", "ditch", "dam",
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91 * "ringdike".
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92 *
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93 * @return an OpenLayers.Style object.
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94 */
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95 public static Style getStyle(String type) {
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96 Style style = new Style();
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97
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98 if (type == null) {
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99 return null;
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100 }
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101
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102 if (type.equals(DrawControl.BARRIER_PIPE1)
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103 || type.equals(DrawControl.BARRIER_PIPE1_VALUE)
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104 ) {
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105 style.setFillColor("#800080");
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106 style.setStrokeColor("#800080");
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107 }
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108 else if (type.equals(DrawControl.BARRIER_PIPE2)
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109 || type.equals(DrawControl.BARRIER_PIPE2_VALUE)
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110 ) {
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111 style.setFillColor("#808080");
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112 style.setStrokeColor("#808080");
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113 }
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114 else if (type.equals(DrawControl.BARRIER_DAM)
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115 || type.equals(DrawControl.BARRIER_DAM_VALUE)
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116 ) {
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117 style.setFillColor("#008000");
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diff changeset
118 style.setStrokeColor("#008000");
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diff changeset
119 }
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diff changeset
120 else if (type.equals(DrawControl.BARRIER_DITCH)
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diff changeset
121 || type.equals(DrawControl.BARRIER_DITCH_VALUE)
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diff changeset
122 ) {
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diff changeset
123 style.setFillColor("#800000");
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diff changeset
124 style.setStrokeColor("#800000");
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parents: 881
diff changeset
125 }
d3b4010d2c89 I293: Set the style of digitized features in the map.
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parents: 881
diff changeset
126 else if (type.equals(DrawControl.BARRIER_RINGDIKE)
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parents: 881
diff changeset
127 || type.equals(DrawControl.BARRIER_RINGDIKE_VALUE)
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parents: 881
diff changeset
128 ) {
d3b4010d2c89 I293: Set the style of digitized features in the map.
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diff changeset
129 style.setFill(false);
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diff changeset
130 style.setStrokeColor("#FF8000");
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diff changeset
131 }
d3b4010d2c89 I293: Set the style of digitized features in the map.
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diff changeset
132
d3b4010d2c89 I293: Set the style of digitized features in the map.
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diff changeset
133 return style;
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parents: 881
diff changeset
134 }
d3b4010d2c89 I293: Set the style of digitized features in the map.
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diff changeset
135
d3b4010d2c89 I293: Set the style of digitized features in the map.
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diff changeset
136
797
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
diff changeset
137 public MapWidget getMapWidget() {
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138 return mapWidget;
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
diff changeset
139 }
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
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140
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
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141
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
diff changeset
142 public Map getMap() {
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143 return map;
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
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144 }
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
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145
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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146
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
diff changeset
147 public String getRiverProjection() {
823
407de0f4b66a Set the map projection and its max extent dynamically - information extracted from facets.
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diff changeset
148 return "EPSG:" + srid;
797
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149 }
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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150
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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151
1315
cf0f906921de #297 Implemented a window to adjust elevations of geometries in the map.
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diff changeset
152 public Bounds getMaxExtent() {
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diff changeset
153 return maxExtent;
cf0f906921de #297 Implemented a window to adjust elevations of geometries in the map.
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diff changeset
154 }
cf0f906921de #297 Implemented a window to adjust elevations of geometries in the map.
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parents: 915
diff changeset
155
cf0f906921de #297 Implemented a window to adjust elevations of geometries in the map.
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diff changeset
156
800
95cc560ce7c4 Added map controls for digitizing and removing barriers.
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diff changeset
157 public Vector getBarrierLayer() {
95cc560ce7c4 Added map controls for digitizing and removing barriers.
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diff changeset
158 if (barrierLayer == null) {
823
407de0f4b66a Set the map projection and its max extent dynamically - information extracted from facets.
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parents: 806
diff changeset
159 VectorOptions opts = new VectorOptions();
407de0f4b66a Set the map projection and its max extent dynamically - information extracted from facets.
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parents: 806
diff changeset
160 opts.setProjection(getRiverProjection());
1315
cf0f906921de #297 Implemented a window to adjust elevations of geometries in the map.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 915
diff changeset
161 opts.setMaxExtent(getMaxExtent());
823
407de0f4b66a Set the map projection and its max extent dynamically - information extracted from facets.
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parents: 806
diff changeset
162
407de0f4b66a Set the map projection and its max extent dynamically - information extracted from facets.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 806
diff changeset
163 barrierLayer = new Vector(LAYER_BARRIERS, opts);
806
e50da1f74e58 The layers created in the floodmap reflect to the facets this output mode has.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 800
diff changeset
164 barrierLayer.setIsBaseLayer(true);
823
407de0f4b66a Set the map projection and its max extent dynamically - information extracted from facets.
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diff changeset
165
800
95cc560ce7c4 Added map controls for digitizing and removing barriers.
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parents: 799
diff changeset
166 map.addLayer(barrierLayer);
882
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diff changeset
167
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diff changeset
168 barrierLayer.addVectorFeatureAddedListener(this);
800
95cc560ce7c4 Added map controls for digitizing and removing barriers.
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diff changeset
169 }
95cc560ce7c4 Added map controls for digitizing and removing barriers.
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diff changeset
170
95cc560ce7c4 Added map controls for digitizing and removing barriers.
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diff changeset
171 return barrierLayer;
95cc560ce7c4 Added map controls for digitizing and removing barriers.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 799
diff changeset
172 }
95cc560ce7c4 Added map controls for digitizing and removing barriers.
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diff changeset
173
95cc560ce7c4 Added map controls for digitizing and removing barriers.
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parents: 799
diff changeset
174
833
dcecdd9693a8 Added a UIProvider that displays a combobox on the left and a map widget in the helper container.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 823
diff changeset
175 public String getFeaturesAsGeoJSON() {
1317
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
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parents: 1315
diff changeset
176 // disable features before exporting to GeoJSON
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
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parents: 1315
diff changeset
177 disableFeatures();
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
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parents: 1315
diff changeset
178
833
dcecdd9693a8 Added a UIProvider that displays a combobox on the left and a map widget in the helper container.
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parents: 823
diff changeset
179 VectorFeature[] features = barrierLayer.getFeatures();
dcecdd9693a8 Added a UIProvider that displays a combobox on the left and a map widget in the helper container.
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parents: 823
diff changeset
180
dcecdd9693a8 Added a UIProvider that displays a combobox on the left and a map widget in the helper container.
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parents: 823
diff changeset
181 if (features == null || features.length == 0) {
dcecdd9693a8 Added a UIProvider that displays a combobox on the left and a map widget in the helper container.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 823
diff changeset
182 return null;
dcecdd9693a8 Added a UIProvider that displays a combobox on the left and a map widget in the helper container.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 823
diff changeset
183 }
dcecdd9693a8 Added a UIProvider that displays a combobox on the left and a map widget in the helper container.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 823
diff changeset
184
dcecdd9693a8 Added a UIProvider that displays a combobox on the left and a map widget in the helper container.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 823
diff changeset
185 return new GeoJSON().write(features);
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parents: 823
diff changeset
186 }
dcecdd9693a8 Added a UIProvider that displays a combobox on the left and a map widget in the helper container.
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187
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188
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cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
diff changeset
189 public void setSize(String width, String height) {
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parents:
diff changeset
190 mapWidget.setWidth(width);
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parents:
diff changeset
191 mapWidget.setHeight(height);
1386
9aa1a453eed5 Issue 294.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1317
diff changeset
192 int currentZoom = map.getZoom();
9aa1a453eed5 Issue 294.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1317
diff changeset
193 LonLat currentCenter = map.getCenter();
9aa1a453eed5 Issue 294.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1317
diff changeset
194 map.updateSize();
9aa1a453eed5 Issue 294.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1317
diff changeset
195 map.zoomTo(currentZoom);
9aa1a453eed5 Issue 294.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 1317
diff changeset
196 map.setCenter(currentCenter);
797
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
diff changeset
197 }
915
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
198
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
199
1448
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
200 public void addLayer(Layer layer) {
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
201 if (layer != null) {
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
202 map.addLayer(layer);
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
203
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
204 int index = map.getLayerIndex(layer);
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
205 int newIndex = index * (-1) + 1;
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
206
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
207 map.raiseLayer(layer, newIndex);
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
208
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
209 update();
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
210 }
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
211 }
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
212
c39aa5a6478c #409 Made layer list and map layers synchron.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1398
diff changeset
213
915
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
214 public void hideBarrierLayer () {
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
215 if (barrierLayer != null) {
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
216 barrierLayer.setIsVisible(false);
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
217 }
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
218 }
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
219
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
220 public void showBarrierLayer () {
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
221 if (barrierLayer != null) {
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
222 barrierLayer.setIsVisible(true);
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
223 }
89a47098bcbd Hide geometry layer in floodmap when tab selection changes.
Raimund Renkert <raimund.renkert@intevation.de>
parents: 882
diff changeset
224 }
1317
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
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parents: 1315
diff changeset
225
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
226
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
227 public void selectFeature(VectorFeature feature) {
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
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parents: 1315
diff changeset
228 if (feature != null) {
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
229 selectFeatures(new VectorFeature[] { feature } );
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
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parents: 1315
diff changeset
230 }
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
231 }
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
232
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
233
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
234 public void selectFeatures(VectorFeature[] features) {
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
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parents: 1315
diff changeset
235 if (features == null || features.length == 0) {
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
236 return;
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
237 }
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
238
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
239 for (VectorFeature feature: features) {
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
240 Attributes attr = feature.getAttributes();
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
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parents: 1315
diff changeset
241
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
242 if (attr.getAttributeAsInt(MARK_SELECTED) == 1) {
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
243 continue;
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
diff changeset
244 }
45b9b1fc26e2 Improved error handling while using the elevation control - Make selected features in the map visible.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 1315
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245
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246 attr.setAttribute(MARK_SELECTED, 1);
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247
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248 Style style = feature.getStyle();
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249 double strokeWidth = style.getStrokeWidth();
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250
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251 style.setStrokeWidth(strokeWidth+SELECTED_STROKE_WIDTH);
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252 }
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253
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254 getBarrierLayer().redraw();
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255 }
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256
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257
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258 public void disableFeatures() {
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259 Vector barriers = getBarrierLayer();
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260 VectorFeature[] features = barriers.getFeatures();
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261
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262 if (features == null || features.length == 0) {
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263 return;
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264 }
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265
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266 disableFeatures(features);
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267 }
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268
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269
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270 public void disableFeature(VectorFeature feature) {
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271 if (feature != null) {
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272 disableFeatures(new VectorFeature[] { feature });
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273 }
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274 }
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275
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276
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277 public void disableFeatures(VectorFeature[] features) {
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278 if (features == null || features.length == 0) {
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279 return;
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280 }
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281
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282 for (VectorFeature feature: features) {
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283 Attributes attr = feature.getAttributes();
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284
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285 if (attr.getAttributeAsInt(MARK_SELECTED) == 0) {
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286 continue;
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287 }
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288
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289 attr.setAttribute(FloodMap.MARK_SELECTED, 0);
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290
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291 Style style = feature.getStyle();
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292 double strokeWidth = style.getStrokeWidth();
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293
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294 style.setStrokeWidth(strokeWidth-SELECTED_STROKE_WIDTH);
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295 }
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296
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297 getBarrierLayer().redraw();
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298 }
1397
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299
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300
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301 public void update() {
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302 Layer[] layers = map.getLayers();
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303
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304 for (Layer l: layers) {
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305 l.redraw();
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306 }
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307 }
797
cc3f481e9484 Introduced GwtOpenLayers to bring up maps.
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parents:
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308 }
799
f4299b90c996 Added controls to navigate in the map.
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309 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org