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/*
* Map - Easy to use OpenLayers map object
*
* by Smári McCarthy & Olle Jonsson
*
* Freely distributable under the terms of the GNU General Public License v3.0
*/
function Map() {
var map;
var layers = {};
var icon;
return {
getMap: function() {
return map;
},
init: function(element, mlat, mlon, mzoom) {
// Where to focus at first
var lat=23;
var lon=0;
var zoom=2;
if (mlat != undefined) {
var lat = mlat;
}
if (mlon != undefined) {
var lon = mlon;
}
if (mzoom != undefined) {
var zoom = mzoom;
}
// Create the map itself...
map = new OpenLayers.Map(element, {
controls:[
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.PanZoomBar(),
new OpenLayers.Control.MousePosition(),
new OpenLayers.Control.LayerSwitcher(),
],
maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
maxResolution: 156543.0399,
numZoomLevels: 17,
units: 'm',
projection: new OpenLayers.Projection("EPSG:900913"),
displayProjection: new OpenLayers.Projection("EPSG:4326"),
// I don't know why we're registering all these event listeners? Can't we do this a smarter way?
eventListeners: {
"moveend": this.onMapEvent,
"zoomend": this.onMapEvent,
"changelayer": this.onMapLayerChanged,
"changebaselayer": this.onMapBaseLayerChanged,
}
} );
// FIXME: We want to be able to control arbitrary layers here. for more general purpose mapping
// The TilesAtHome layer...
layers["mapnik"] = new OpenLayers.Layer.OSM.Mapnik("Mapnik");
layers["tilesathome"] = new OpenLayers.Layer.OSM.Osmarender("Tiles@Home");
map.addLayers([layers["tilesathome"], layers["mapnik"]]);
// The Sites layer...
layers["sites"] = new OpenLayers.Layer.Markers("Sites");
map.addLayer(layers["sites"]);
layers["sites"].events.on({
'featureselected': this.onFeatureSelect,
'featureunselected': this.onFeatureUnselect
});
// Zoom to the initial center
if( ! map.getCenter() ){
var lonLat = new OpenLayers.LonLat(lon, lat).transform(map.displayProjection, map.projection);
map.setCenter (lonLat, zoom);
}
// Return the map object for handy direct manipulation.
return map;
},
onMapEvent: function(evt) {
},
onMapLayerChanged: function(evt) {
},
onMapBaseLayerChanged: function(evt) {
},
onFeatureSelect: function(evt) {
var feature = evt.feature;
var popup = new OpenLayers.Popup.FramedCloud("featurePopup",
feature.geometry.getBounds().getCenterLonLat(),
new OpenLayers.Size(100,100),
'Foo!',
null, true, this.onPopupClose);
feature.popup = popup;
popup.feature = feature;
map.addPopup(popup);
},
onFeatureUnselect: function (evt) {
var feature = evt.feature;
if (feature.popup) {
popup.feature = null;
map.removePopup(feature.popup);
feature.popup.destroy();
feature.popup = null;
}
},
createMarker: function(lat, lon, name, locname, website) {
// new OpenLayers.Marker(lonLat,icon),
// Create a handy marker icon... (FIXME: this should be elsewhere)
var size = new OpenLayers.Size(21,25);
var offset = new OpenLayers.Pixel(-(size.w/2), -size.h);
var icon = new OpenLayers.Icon('http://www.openstreetmap.org/openlayers/img/marker.png',size,offset);
var point = new OpenLayers.LonLat(lon, lat).transform(map.displayProjection, map.projection);
var marker = new OpenLayers.Marker(point, icon);
// var m = marker.attributes;
// m.lat = lat;
// m.lon = lon;
// m.name = name;
// m.locname = locname;
// m.website = website;
return marker;
},
addMarker: function(layer, marker) {
if (layers[layer] != undefined) {
layers[layer].addMarker(marker);
}
},
// FIXME: This needs generalizing
quickMarker: function(layer, lat, lon, name, locname, website, icon) {
this.addMarker(layer, this.createMarker(lat, lon, name, locname, website));
},
zoomLocation: function(lat, lon, zoom) {
map.setCenter(new OpenLayers.LonLat(lon, lat).transform(map.displayProjection, map.projection), zoom);
},
onPopupClose: function(evt) {
// 'this' is the popup.
selectControl.unselect(this.feature);
}
};
}
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