-page.replace_html :sidebar_title, 'Browse'
+page.replace_html :sidebar_title, 'Data'
page.replace_html :sidebar_content, :partial => 'start'
page << <<EOJ
- var gml, sf, obj_list, currentFeature;
- OpenLayers.Feature.Vector.style['default'].strokeWidth = 3;
- OpenLayers.Feature.Vector.style['default'].cursor = "pointer";
- function start() {
- openSidebar({ onclose: stopBrowse });
- vectors = new OpenLayers.Layer.Vector("Vector Layer", {
- displayInLayerSwitcher: false
- });
-
- box = new OpenLayers.Control.DrawFeature(vectors, OpenLayers.Handler.RegularPolygon, {
- handlerOptions: {
- sides: 4,
- snapAngle: 90,
- irregular: true,
- persist: true,
- callbacks: { done: endDrag }
- }
- });
- map.addControl(box);
- }
- function stopBrowse() {
- if (gml) {
- gml.destroy();
- gml = null;
- }
- if (sf) {
- sf.destroy();
- sf = null;
- }
- }
- function startDrag() {
- $("drag_box").innerHTML='Drag a box on the map to select an area';
- box.activate();
+ var browseBoxControl;
+ var browseActive;
+ var browseMode = "auto";
+ var browseBounds;
+ var browseFeatureList;
+ var browseActiveFeature;
+ var browseDataLayer;
+ var browseSelectControl;
+ var browseObjectList;
+
+ OpenLayers.Feature.Vector.style['default'].strokeWidth = 3;
+ OpenLayers.Feature.Vector.style['default'].cursor = "pointer";
+
+ function startBrowse() {
+ browseActive = true;
+
+ openSidebar({ onclose: stopBrowse });
+
+ var vectors = new OpenLayers.Layer.Vector();
+
+ browseBoxControl = new OpenLayers.Control.DrawFeature(vectors, OpenLayers.Handler.RegularPolygon, {
+ handlerOptions: {
+ sides: 4,
+ snapAngle: 90,
+ irregular: true,
+ persist: true,
+ callbacks: { done: endDrag }
+ }
+ });
+ map.addControl(browseBoxControl);
+
+ map.events.register("moveend", map, showData);
+ map.events.triggerEvent("moveend");
+ }
+
+ function showData() {
+ if (browseMode == "auto") {
+ if (map.getZoom() >= 15) {
+ useMap();
+ } else {
+ setStatus("Zoom in or select an area of the map to view");
+ }
+ }
+ }
+
+ function stopBrowse() {
+ if (browseActive) {
+ browseActive = false;
+
+ if (browseDataLayer) {
+ browseDataLayer.destroy();
+ browseDataLayer = null;
+ }
+
+ if (browseSelectControl) {
+ browseSelectControl.destroy();
+ browseSelectControl = null;
+ }
+
+ if (browseBoxControl) {
+ browseBoxControl.destroy();
+ browseBoxControl = null;
+ }
+
+ if (browseActiveFeature) {
+ browseActiveFeature.destroy();
+ browseActiveFeature = null;
+ }
+
+ map.dataLayer.setVisibility(false);
+ map.events.unregister("moveend", map, showData);
+ }
+ }
+
+ function startDrag() {
+ $("browse_select_box").innerHTML='Drag a box on the map to select an area';
+
+ browseBoxControl.activate();
+
return false;
- };
+ };
+
+ $("browse_select_box").onclick = startDrag;
- $("drag_box").onclick = startDrag;
-
function useMap() {
- var bounds = map.getExtent();
- setBounds(bounds);
- getData(bounds);
+ var bounds = map.getExtent();
+ var projected = bounds.clone().transform(map.getProjectionObject(), epsg4326);
+
+ if (!browseBounds || !browseBounds.containsBounds(projected)) {
+ var center = bounds.getCenterLonLat();
+ var tileWidth = bounds.getWidth() * 1.2;
+ var tileHeight = bounds.getHeight() * 1.2;
+ var tileBounds = new OpenLayers.Bounds(center.lon - (tileWidth / 2),
+ center.lat - (tileHeight / 2),
+ center.lon + (tileWidth / 2),
+ center.lat + (tileHeight / 2));
+
+ browseBounds = tileBounds;
+ getData(tileBounds);
+
+ browseMode = "auto";
+
+ $("browse_select_view").style.display = "none";
+ }
+
+ return false;
}
- $("use_map").onclick = useMap;
- function dataLoaded() {
- $("status").innerHTML = "Loaded " + this.features.length + " features. (<a href='"+ this.url+"'>API</a>)";
-
- obj_list = document.createElement("ul");
- for (var i = 0; i < this.features.length; i++) {
- var feature = this.features[i];
- var type ="way";
- if (feature.geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
- type = "node";
- }
- var nice_name = type.substr(0,1).toUpperCase() + type.substr(1,type.length);
- var li = document.createElement("li");
- li.appendChild(document.createTextNode(nice_name + " "));
- var link = document.createElement("a");
- link.href = "/browse/"+type+"/"+feature.osm_id;
- var name = feature.attributes.name || feature.osm_id;
- link.appendChild(document.createTextNode(name));
- li.appendChild(link);
- li.appendChild(document.createTextNode(" "));
- var link = document.createElement("a");
- link.href = "#";
- link.appendChild(document.createTextNode("+"));
- link.feature = feature;
- link.onclick = OpenLayers.Function.bind(function() {
- var layer = this.feature.layer;
- for (var i = 0; i < layer.selectedFeatures.length; i++) {
- var f = layer.selectedFeatures[i];
- layer.drawFeature(f, layer.styleMap.createSymbolizer(f, "default"));
- }
- on_feature_hover(this.feature);
- map.setCenter(this.feature.geometry.getBounds().getCenterLonLat());
- }, link);
- li.appendChild(link);
- obj_list.appendChild(li);
+
+ $("browse_select_view").onclick = useMap;
+
+ function endDrag(bbox) {
+ var bounds = bbox.getBounds();
+ var projected = bounds.clone().transform(map.getProjectionObject(), epsg4326);
+
+ browseBoxControl.deactivate();
+ browseBounds = projected;
+ getData(bounds);
+
+ browseMode = "manual";
+
+ $("browse_select_box").innerHTML = "Manually select a different area";
+ $("browse_select_view").style.display = "inline";
+ }
+
+ function displayFeatureWarning() {
+ clearStatus();
+
+ var div = document.createElement("div");
+
+ var p = document.createElement("p");
+ p.appendChild(document.createTextNode("You have loaded an area which contains " + browseFeatureList.length + " features. In general, some browsers may not cope well with displaying this quantity of data. Generally, browsers work best at displaying less than 100 features at a time: doing anything else may make your browser slow/unresponsive. If you are sure you want to display this data, you may do so by clicking the button below."));
+ div.appendChild(p);
+
+ var input = document.createElement("input");
+ input.type = "submit";
+ input.value = "Load Data";
+ input.onclick = loadFeatureList;
+ div.appendChild(input);
+
+ $("browse_content").innerHTML = "";
+ $("browse_content").appendChild(div);
+ }
+
+ function loadFeatureList() {
+ browseDataLayer.addFeatures(browseFeatureList);
+ browseDataLayer.events.triggerEvent("loadend");
+
+ browseFeatureList = [];
+
+ return false;
+ }
+
+ function customDataLoader(request) {
+ if (browseActive) {
+ var doc = request.responseXML;
+
+ if (!doc || !doc.documentElement) {
+ doc = request.responseText;
}
- $("object").innerHTML = "";
- $("object").appendChild(obj_list);
+
+ var options = {};
+
+ OpenLayers.Util.extend(options, this.formatOptions);
+
+ if (this.map && !this.projection.equals(this.map.getProjectionObject())) {
+ options.externalProjection = this.projection;
+ options.internalProjection = this.map.getProjectionObject();
+ }
+
+ var gml = this.format ? new this.format(options) : new OpenLayers.Format.GML(options);
+
+ browseFeatureList = gml.read(doc);
+
+ if (!this.maxFeatures || browseFeatureList.length <= this.maxFeatures) {
+ loadFeatureList();
+ } else {
+ displayFeatureWarning();
+ }
+ }
}
+
function getData(bounds) {
- $("status").innerHTML = "Loading...";
- bounds.transform(new OpenLayers.Projection("EPSG:900913"), new OpenLayers.Projection("EPSG:4326"));
- var url = "/api/0.5/map?bbox="+bounds.toBBOX();
- if (!gml) {
- var def = OpenLayers.Feature.Vector.style['default'];
- var style = new OpenLayers.Style();
- style.addRules([new OpenLayers.Rule(
- {'symbolizer':
- {"Polygon": {'fillColor': '#ff0000', 'strokeColor': '#ff0000'},
- "Line": {'fillColor': '#ffff00', 'strokeColor': '#000000', strokeOpacity: '0.4'},
- "Point": {'fillColor': '#00ff00', 'strokeColor': '#00ff00'}}
- }
- )]);
- gml = new OpenLayers.Layer.GML("Data",url,
- {format: OpenLayers.Format.OSM, formatOptions: {checkTags: true},
- styleMap: new OpenLayers.StyleMap({'default': style, 'select': {'strokeColor': '#0000ff'}})
- }
- );
- gml.events.register("loadend", gml, dataLoaded );
- map.addLayer(gml);
- sf = new OpenLayers.Control.SelectFeature(gml, {'onSelect': on_feature_hover});
- map.addControl(sf);
- sf.activate();
+ var projected = bounds.clone().transform(new OpenLayers.Projection("EPSG:900913"), new OpenLayers.Projection("EPSG:4326"));
+ var size = projected.getWidth() * projected.getHeight();
+ if (size > 0.25) {
+ setStatus("Unable to load: Bounding box size of " + size + " is too large (must be smaller than 0.25)");
} else {
- gml.setUrl(url);
+ loadGML("/api/0.5/map?bbox=" + projected.toBBOX());
}
}
- function endDrag(bbox) {
- var bounds = bbox.getBounds();
- setBounds(bounds);
- box.deactivate();
- getData(bounds);
- $("drag_box").innerHTML = "Select an area to see features";
+ function loadGML(url) {
+ setStatus("Loading...");
+ $("browse_content").innerHTML = "";
+
+ if (!browseDataLayer) {
+ var style = new OpenLayers.Style();
+
+ style.addRules([new OpenLayers.Rule({
+ symbolizer: {
+ Polygon: { fillColor: '#ff0000', strokeColor: '#ff0000' },
+ Line: { fillColor: '#ffff00', strokeColor: '#000000', strokeOpacity: '0.4' },
+ Point: { fillColor: '#00ff00', strokeColor: '#00ff00' }
+ }
+ })]);
+
+ browseDataLayer = new OpenLayers.Layer.GML("Data", url, {
+ format: OpenLayers.Format.OSM,
+ formatOptions: { checkTags: true },
+ maxFeatures: 100,
+ requestSuccess: customDataLoader,
+ displayInLayerSwitcher: false,
+ styleMap: new OpenLayers.StyleMap({
+ 'default': style,
+ 'select': { strokeColor: '#0000ff', strokeWidth: 8 }
+ })
+ });
+ browseDataLayer.events.register("loadend", browseDataLayer, dataLoaded );
+ map.addLayer(browseDataLayer);
+
+ browseSelectControl = new OpenLayers.Control.SelectFeature(browseDataLayer, { onSelect: onFeatureSelect });
+ browseSelectControl.handlers.feature.stopDown = false;
+ browseSelectControl.handlers.feature.stopUp = false;
+ map.addControl(browseSelectControl);
+ browseSelectControl.activate();
+ } else {
+ browseDataLayer.setUrl(url);
+ }
+
+ browseActiveFeature = null;
}
- function loadObjList() {
- $("object").innerHTML="";
- $("object").appendChild(obj_list);
+
+ function dataLoaded() {
+ if (browseActive) {
+ clearStatus();
+
+ browseObjectList = document.createElement("div")
+
+ var heading = document.createElement("p");
+ heading.className = "browse_heading";
+ heading.appendChild(document.createTextNode("Object list"));
+ browseObjectList.appendChild(heading);
+
+ var list = document.createElement("ul");
+
+ for (var i = 0; i < this.features.length; i++) {
+ var feature = this.features[i];
+
+ // Type, for linking
+ var type = featureType(feature);
+ var typeName = ucFirst(type);
+ var li = document.createElement("li");
+ li.appendChild(document.createTextNode(typeName + " "));
+
+ // Link, for viewing in the tab
+ var link = document.createElement("a");
+ link.href = "/browse/" + type + "/" + feature.osm_id;
+ var name = feature.attributes.name || feature.osm_id;
+ link.appendChild(document.createTextNode(name));
+ link.feature = feature;
+ link.onclick = OpenLayers.Function.bind(viewFeatureLink, link);
+ li.appendChild(link);
+
+ list.appendChild(li);
+ }
+
+ browseObjectList.appendChild(list)
+
+ var link = document.createElement("a");
+ link.href = this.url;
+ link.appendChild(document.createTextNode("API"));
+ browseObjectList.appendChild(link);
+
+ $("browse_content").innerHTML = "";
+ $("browse_content").appendChild(browseObjectList);
+ }
}
- function on_feature_hover(feature) {
- if (currentFeature) {
- currentFeature.layer.drawFeature(
- currentFeature, currentFeature.layer.styleMap.createSymbolizer(currentFeature, "default")
- );
- }
- feature.layer.drawFeature(
- feature, feature.layer.styleMap.createSymbolizer(feature, "select")
+ function viewFeatureLink() {
+ var layer = this.feature.layer;
+
+ for (var i = 0; i < layer.selectedFeatures.length; i++) {
+ var f = layer.selectedFeatures[i];
+ layer.drawFeature(f, layer.styleMap.createSymbolizer(f, "default"));
+ }
+
+ onFeatureSelect(this.feature);
+
+ if (browseMode != "auto") {
+ map.setCenter(this.feature.geometry.getBounds().getCenterLonLat());
+ }
+
+ return false;
+ }
+
+ function loadObjectList() {
+ $("browse_content").innerHTML="";
+ $("browse_content").appendChild(browseObjectList);
+
+ return false;
+ }
+
+ function onFeatureSelect(feature) {
+ // Unselect previously selected feature
+ if (browseActiveFeature) {
+ browseActiveFeature.layer.drawFeature(
+ browseActiveFeature,
+ browseActiveFeature.layer.styleMap.createSymbolizer(browseActiveFeature, "default")
);
- if ($("object").firstChild == $("object").obj_list) {
- $("object").removeChild(obj_list);
- } else {
- $("object").innerHTML = "";
- }
- var div = document.createElement("div");
- var link = document.createElement("a");
- link.href="#";
- link.onclick = loadObjList;
- link.appendChild(document.createTextNode("Back to Object List"));
- div.appendChild(link)
- $("object").appendChild(div);
- var ul = document.createElement("ul");
- var type ="way";
- if (feature.geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
- type = "node";
- }
+ }
+
+ // Redraw in selected style
+ feature.layer.drawFeature(
+ feature, feature.layer.styleMap.createSymbolizer(feature, "select")
+ );
+
+ // If the current object is the list, don't innerHTML="", since that could clear it.
+ if ($("browse_content").firstChild == browseObjectList) {
+ $("browse_content").removeChild(browseObjectList);
+ } else {
+ $("browse_content").innerHTML = "";
+ }
+
+ // Create a link back to the object list
+ var div = document.createElement("div");
+ div.style.textAlign = "center";
+ div.style.marginBottom = "20px";
+ $("browse_content").appendChild(div);
+ var link = document.createElement("a");
+ link.href = "#";
+ link.onclick = loadObjectList;
+ link.appendChild(document.createTextNode("Display object list"));
+ div.appendChild(link);
+
+ var table = document.createElement("table");
+ table.width = "100%";
+ table.className = "browse_heading";
+ $("browse_content").appendChild(table);
+
+ var tr = document.createElement("tr");
+ table.appendChild(tr);
+
+ var heading = document.createElement("td");
+ heading.appendChild(document.createTextNode(featureName(feature)));
+ tr.appendChild(heading);
+
+ var td = document.createElement("td");
+ td.align = "right";
+ tr.appendChild(td);
+
+ var type = featureType(feature);
+ var link = document.createElement("a");
+ link.href = "/browse/" + type + "/" + feature.osm_id;
+ link.appendChild(document.createTextNode("Details"));
+ td.appendChild(link);
+
+ var div = document.createElement("div");
+ div.className = "browse_details";
+
+ $("browse_content").appendChild(div);
+
+ // Now the list of attributes
+ var ul = document.createElement("ul");
+ for (var key in feature.attributes) {
var li = document.createElement("li");
- var link = document.createElement("a");
- link.href = "/browse/"+type+"/"+feature.osm_id;
- link.appendChild(document.createTextNode(feature.osm_id));
- li.appendChild(link);
+ var b = document.createElement("b");
+ b.appendChild(document.createTextNode(key));
+ li.appendChild(b);
+ li.appendChild(document.createTextNode(": " + feature.attributes[key]));
ul.appendChild(li);
- for (var key in feature.attributes) {
- var li = document.createElement("li");
- li.appendChild(document.createTextNode(key + ": " + feature.attributes[key]));
- ul.appendChild(li);
- }
- $("object").appendChild(ul);
- currentFeature = feature;
+ }
+
+ div.appendChild(ul);
+
+ var link = document.createElement("a");
+ link.href = "/browse/" + type + "/" + feature.osm_id + "/history";
+ link.appendChild(document.createTextNode("Show history"));
+ link.onclick = OpenLayers.Function.bind(loadHistory, {
+ type: type, feature: feature, link: link
+ });
+
+ div.appendChild(link);
+
+ // Stash the currently drawn feature
+ browseActiveFeature = feature;
}
- function setBounds(bounds) {
- var epsg4326 = new OpenLayers.Projection("EPSG:4326");
- var decimals = Math.pow(10, Math.floor(map.getZoom() / 3));
- bounds = bounds.clone().transform(map.getProjectionObject(), epsg4326);
+ function loadHistory() {
+ this.link.href = "";
+ this.link.innerHTML = "Wait...";
+
+ new Ajax.Request("/api/0.5/" + this.type + "/" + this.feature.osm_id + "/history", {
+ onComplete: OpenLayers.Function.bind(displayHistory, this)
+ });
+
+ return false;
+ }
+
+ function displayHistory(request) {
+ if (browseActiveFeature.osm_id != this.feature.osm_id || $("browse_content").firstChild == browseObjectList) {
+ return false;
+ }
+
+ this.link.parentNode.removeChild(this.link);
+
+ var doc = request.responseXML;
+
+ var table = document.createElement("table");
+ table.width = "100%";
+ table.className = "browse_heading";
+ $("browse_content").appendChild(table);
+
+ var tr = document.createElement("tr");
+ table.appendChild(tr);
+
+ var heading = document.createElement("td");
+ heading.appendChild(document.createTextNode("History for " + featureName(this.feature)));
+ tr.appendChild(heading);
+
+ var td = document.createElement("td");
+ td.align = "right";
+ tr.appendChild(td);
+
+ var link = document.createElement("a");
+ link.href = "/browse/" + this.type + "/" + this.feature.osm_id + "/history";
+ link.appendChild(document.createTextNode("Details"));
+ td.appendChild(link);
+
+ var div = document.createElement("div");
+ div.className = "browse_details";
+
+ var nodes = doc.getElementsByTagName(this.type);
+ var history = document.createElement("ul");
+ for (var i = nodes.length - 1; i >= 0; i--) {
+ var user = nodes[i].getAttribute("user") || "private user";
+ var timestamp = nodes[i].getAttribute("timestamp");
+ var item = document.createElement("li");
+ item.appendChild(document.createTextNode("Edited by " + user + " at " + timestamp));
+ history.appendChild(item);
+ }
+ div.appendChild(history);
+
+ $("browse_content").appendChild(div);
+ }
+
+ function featureType(feature) {
+ if (feature.geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
+ return "node";
+ } else {
+ return "way";
+ }
+ }
+
+ function featureName(feature) {
+ if (feature.attributes.name) {
+ return feature.attributes.name;
+ } else {
+ return ucFirst(featureType(feature)) + " " + feature.osm_id;
+ }
+ }
+
+ function setStatus(status) {
+ $("browse_status").innerHTML = status;
+ $("browse_status").style.display = "block";
+ }
+
+ function clearStatus() {
+ $("browse_status").innerHTML = "";
+ $("browse_status").style.display = "none";
+ }
- $("minlon").innerHTML = Math.round(bounds.left * decimals) / decimals;
- $("minlat").innerHTML = Math.round(bounds.bottom * decimals) / decimals;
- $("maxlon").innerHTML = Math.round(bounds.right * decimals) / decimals;
- $("maxlat").innerHTML = Math.round(bounds.top * decimals) / decimals;
+ function ucFirst(str) {
+ return str.substr(0,1).toUpperCase() + str.substr(1,str.length);
}
-start();
+ startBrowse();
EOJ
projects / rails.git / blobdiff