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author | Chris Schlaeger <chris@linux.com> | 2014-08-12 21:56:44 +0200 |
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committer | Chris Schlaeger <chris@linux.com> | 2014-08-12 21:56:44 +0200 |
commit | ea346a785dc1b3f7c156f6fc33da634e1f1a627b (patch) | |
tree | af67530553d20b6e82ad60fd79593e9c4abf5565 /misc/openlayers/examples/sld.js | |
parent | 59741cd535c47f25971bf8c32b25da25ceadc6d5 (diff) | |
download | postrunner-ea346a785dc1b3f7c156f6fc33da634e1f1a627b.zip |
Adding jquery, flot and openlayers to be included with the GEM.v0.0.4
Diffstat (limited to 'misc/openlayers/examples/sld.js')
-rw-r--r-- | misc/openlayers/examples/sld.js | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/misc/openlayers/examples/sld.js b/misc/openlayers/examples/sld.js new file mode 100644 index 0000000..888a9c6 --- /dev/null +++ b/misc/openlayers/examples/sld.js @@ -0,0 +1,102 @@ +var map, sld, waterBodies; +var format = new OpenLayers.Format.SLD(); +function init() { + + map = new OpenLayers.Map('map', {allOverlays: true}); + var layers = createLayers(); + map.addLayers(layers); + + waterBodies = layers[2]; + map.addControl(new OpenLayers.Control.SelectFeature( + waterBodies, {hover: true, autoActivate: true} + )); + map.addControl(new OpenLayers.Control.LayerSwitcher()); + + OpenLayers.Request.GET({ + url: "tasmania/sld-tasmania.xml", + success: complete + }); +} + +// handler for the OpenLayers.Request.GET function in the init method +function complete(req) { + sld = format.read(req.responseXML || req.responseText); + buildStyleChooser(); + setLayerStyles(); + + map.zoomToExtent(new OpenLayers.Bounds(143,-39,150,-45)); +} + +function createLayers() { + // the name of each layer matches a NamedLayer name in the SLD document + var layerData = [{ + name: "Land", + url: "tasmania/TasmaniaStateBoundaries.xml" + }, { + name: "Roads", + url: "tasmania/TasmaniaRoads.xml" + }, { + name: "WaterBodies", + url: "tasmania/TasmaniaWaterBodies.xml" + }, { + name: "Cities", + url: "tasmania/TasmaniaCities.xml" + }]; + + var layers = []; + for (var i=0,ii=layerData.length; i<ii; ++i) { + layers.push(new OpenLayers.Layer.Vector( + layerData[i].name, { + protocol: new OpenLayers.Protocol.HTTP({ + url: layerData[i].url, + format: new OpenLayers.Format.GML.v2() + }), + strategies: [new OpenLayers.Strategy.Fixed()], + // empty style map, will be populated in setLayerStyles + styleMap: new OpenLayers.StyleMap() + } + )); + } + return layers; +} + +function setLayerStyles() { + // set the default style for each layer from sld + for (var l in sld.namedLayers) { + var styles = sld.namedLayers[l].userStyles, style; + for (var i=0,ii=styles.length; i<ii; ++i) { + style = styles[i]; + if (style.isDefault) { + map.getLayersByName(l)[0].styleMap.styles["default"] = style; + break; + } + } + } + // select style for mouseover on WaterBodies objects + waterBodies.styleMap.styles.select = sld.namedLayers["WaterBodies"].userStyles[1]; +} + +// add a radio button for each userStyle +function buildStyleChooser() { + var styles = sld.namedLayers["WaterBodies"].userStyles; + var chooser = document.getElementById("style_chooser"), input, li; + for (var i=0,ii=styles.length; i<ii; ++i) { + input = document.createElement("input"); + input.type = "radio"; + input.name = "style"; + input.value = i; + input.checked = i == 0; + input.onclick = function() { setStyle(this.value); }; + li = document.createElement("li"); + li.appendChild(input); + li.appendChild(document.createTextNode(styles[i].title)); + chooser.appendChild(li); + } +} + +// set a new style when the radio button changes +function setStyle(index) { + waterBodies.styleMap.styles["default"] = sld.namedLayers["WaterBodies"].userStyles[index]; + // apply the new style of the features of the Water Bodies layer + waterBodies.redraw(); +} |