1 page.replace_html :sidebar_title, 'Export'
2 page.replace_html :sidebar_content, :partial => 'start'
9 function startExport() {
10 vectors = new OpenLayers.Layer.Vector("Vector Layer", {
11 displayInLayerSwitcher: false
13 map.addLayer(vectors);
15 box = new OpenLayers.Control.DrawFeature(vectors, OpenLayers.Handler.RegularPolygon, {
21 callbacks: { done: endDrag }
26 map.events.register("moveend", map, mapMoved);
27 map.events.register("changebaselayer", map, htmlUrlChanged);
29 openSidebar({ onclose: stopExport });
31 if (map.baseLayer.name == "Mapnik") {
32 $("format_mapnik").checked = true;
33 } else if (map.baseLayer.name == "Osmarender") {
34 $("format_osmarender").checked = true;
38 setBounds(map.getExtent());
40 $("viewanchor").className = "";
41 $("exportanchor").className = "active";
44 function stopExport() {
45 $("viewanchor").className = "active";
46 $("exportanchor").className = "";
50 map.events.unregister("moveend", map, mapMoved);
51 map.events.unregister("changebaselayer", map, htmlUrlChanged);
52 map.removeLayer(vectors);
55 function boundsChanged() {
56 var epsg4326 = new OpenLayers.Projection("EPSG:4326");
57 var bounds = new OpenLayers.Bounds($("minlon").value,
62 bounds.transform(epsg4326, map.getProjectionObject());
64 map.events.unregister("moveend", map, mapMoved);
65 map.zoomToExtent(bounds);
74 $("maxlat").onchange = boundsChanged;
75 $("minlon").onchange = boundsChanged;
76 $("maxlon").onchange = boundsChanged;
77 $("minlat").onchange = boundsChanged;
79 function startDrag() {
80 $("drag_box").innerHTML='Drag a box on the map to select an area';
86 $("drag_box").onclick = startDrag;
88 function endDrag(bbox) {
89 var bounds = bbox.getBounds();
91 map.events.unregister("moveend", map, mapMoved);
97 $("drag_box").innerHTML = "Manually select a different area";
100 function startMarker() {
101 $("add_marker").innerHTML='Click on the map to add a marker';
103 markerLayer = new OpenLayers.Layer.Vector("",{
104 displayInLayerSwitcher: false,
105 style: { externalGraphic: OpenLayers.Util.getImagesLocation()+"marker.png", graphicXOffset:-10.5, graphicYOffset:-25, graphicWidth: 21, graphicHeight: 25}
107 markerControl = new OpenLayers.Control.DrawFeature(markerLayer, OpenLayers.Handler.Point);
108 map.addLayer(markerLayer);
109 map.addControl(markerControl);
110 markerLayer.events.on({"featureadded": endMarker});
112 markerLayer.destroyFeatures();
113 markerControl.activate();
117 $("add_marker").onclick = startMarker;
119 function endMarker(event) {
121 markerControl.deactivate();
122 $("add_marker").innerHTML='Change marker position';
123 $("marker_inputs").style.display="block";
125 var epsg4326 = new OpenLayers.Projection("EPSG:4326");
126 var epsg900913 = new OpenLayers.Projection("EPSG:900913");
127 var geom = event.feature.geometry.clone().transform( epsg900913, epsg4326 );
128 $("marker_lon").value = geom.x.toFixed(5);
129 $("marker_lat").value = geom.y.toFixed(5);
133 function clearMarker() {
134 $("marker_lon").value = "";
135 $("marker_lat").value = "";
136 $("marker_inputs").style.display = "none";
137 $("add_marker").innerHTML='Add a marker to the map';
139 markerControl.destroy();
140 markerLayer.destroy();
142 markerControl = null;
146 function mapMoved() {
147 setBounds(map.getExtent());
151 function setBounds(bounds) {
152 var epsg4326 = new OpenLayers.Projection("EPSG:4326");
153 var decimals = Math.pow(10, Math.floor(map.getZoom() / 3));
155 bounds = bounds.clone().transform(map.getProjectionObject(), epsg4326);
157 $("minlon").value = Math.round(bounds.left * decimals) / decimals;
158 $("minlat").value = Math.round(bounds.bottom * decimals) / decimals;
159 $("maxlon").value = Math.round(bounds.right * decimals) / decimals;
160 $("maxlat").value = Math.round(bounds.top * decimals) / decimals;
166 function clearBox() {
167 vectors.destroyFeatures();
170 function drawBox(bounds) {
171 var feature = new OpenLayers.Feature.Vector(bounds.toGeometry());
173 vectors.addFeatures(feature);
176 function validateControls() {
177 var bounds = new OpenLayers.Bounds($("minlon").value, $("minlat").value, $("maxlon").value, $("maxlat").value);
179 if (bounds.getWidth() * bounds.getHeight() > 0.25) {
180 $("format_osm").disabled = true;
181 $("format_osm").checked = false;
182 $("export_osm").style.display = "none";
184 $("format_osm").disabled = false;
187 var max_scale = maxMapnikScale();
189 if ($("format_mapnik").checked && $("mapnik_scale").value < max_scale) {
190 $("export_commit").disabled = true;
192 $("export_commit").disabled = false;
195 $("mapnik_max_scale").innerHTML = roundScale(max_scale);
197 var max_zoom = maxOsmarenderZoom();
199 for (var o = 0; o < $("osmarender_zoom").options.length; o++) {
200 var option = $("osmarender_zoom").options[o];
202 if (option.value > max_zoom) {
203 option.disabled = true;
205 option.disabled = false;
209 if ($("osmarender_zoom").options.selectedIndex + 4 > max_zoom) {
210 $("osmarender_zoom").options.selectedIndex = max_zoom - 4;
214 function htmlUrlChanged() {
215 var bounds = new OpenLayers.Bounds($("minlon").value, $("minlat").value, $("maxlon").value, $("maxlat").value);
216 var url = "http://#{SERVER_URL}/export/embed.html?bbox=" + bounds.toBBOX();
217 if ($("marker_lat").value && $("marker_lon").value) {
218 url += "&marker=" + $("marker_lat").value + "," + $("marker_lon").value;
221 var layerName = map.baseLayer.name.toLowerCase();
222 if (layerName != "mapnik") {
223 url += "&layer="+layerName;
225 var html = '<iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="'+url+'" style="border: 1px solid black"></iframe>';
226 $("export_html_text").value = html;
228 if ($("format_html").checked) {
229 $("export_html_text").select();
233 function formatChanged() {
234 $("export_commit").style.display = "inline";
236 if ($("format_osm").checked) {
237 $("export_osm").style.display = "inline";
239 $("export_osm").style.display = "none";
242 if ($("format_mapnik").checked) {
243 $("mapnik_scale").value = roundScale(map.getScale());
244 $("export_mapnik").style.display = "inline";
246 $("export_mapnik").style.display = "none";
249 if ($("format_osmarender").checked) {
250 var zoom = Math.min(map.getZoom(), maxOsmarenderZoom());
252 $("osmarender_zoom").options.selectedIndex = zoom - 4;
253 $("export_osmarender").style.display = "inline";
255 $("export_osmarender").style.display = "none";
258 if ($("format_html").checked) {
259 $("export_html").style.display = "inline";
260 $("export_commit").style.display = "none";
261 $("export_html_text").select();
263 $("export_html").style.display = "none";
270 $("format_osm").onclick = formatChanged;
271 $("format_mapnik").onclick = formatChanged;
272 $("format_osmarender").onclick = formatChanged;
273 $("format_html").onclick = formatChanged;
275 function maxMapnikScale() {
276 var bounds = new OpenLayers.Bounds($("minlon").value, $("minlat").value, $("maxlon").value, $("maxlat").value);
277 var epsg4326 = new OpenLayers.Projection("EPSG:4326");
278 var epsg900913 = new OpenLayers.Projection("EPSG:900913");
280 bounds.transform(epsg4326, epsg900913);
282 return Math.floor(Math.sqrt(bounds.getWidth() * bounds.getHeight() / 0.3136));
285 function mapnikImageSize(scale) {
286 var bounds = new OpenLayers.Bounds($("minlon").value, $("minlat").value, $("maxlon").value, $("maxlat").value);
287 var epsg4326 = new OpenLayers.Projection("EPSG:4326");
288 var epsg900913 = new OpenLayers.Projection("EPSG:900913");
290 bounds.transform(epsg4326, epsg900913);
292 return new OpenLayers.Size(Math.round(bounds.getWidth() / scale / 0.00028),
293 Math.round(bounds.getHeight() / scale / 0.00028));
296 function maxOsmarenderZoom() {
297 var bounds = new OpenLayers.Bounds($("minlon").value, $("minlat").value, $("maxlon").value, $("maxlat").value);
298 var xzoom = Math.LOG2E * Math.log(2000 * 1.40625 / bounds.getWidth());
299 var ymin = bounds.bottom * Math.PI / 180;
300 var ymax = bounds.top * Math.PI / 180;
301 var yzoom = Math.LOG2E * (Math.log(2000 * 2 * Math.PI) - Math.log(Math.log((Math.tan(ymax) + 1 / Math.cos(ymax)) / (Math.tan(ymin) + 1 / Math.cos(ymin)))))
303 return Math.floor(Math.min(xzoom, yzoom));
306 function roundScale(scale) {
307 var precision = 5 * Math.pow(10, Math.floor(Math.LOG10E * Math.log(scale)) - 2);
309 return precision * Math.ceil(scale / precision);
312 function mapnikSizeChanged() {
313 var size = mapnikImageSize($("mapnik_scale").value);
315 $("mapnik_image_width").innerHTML = size.w;
316 $("mapnik_image_height").innerHTML = size.h;
319 function mapnikScaleChanged() {
324 $("mapnik_scale").onchange = mapnikScaleChanged;