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root/GaMMa/src/scripts/gamma.js @ master

8fd1d584 Rémy Ménard
/*
* This program is a part of the IoTa project.
*
* Copyright © 2013 Université de Caen Basse-Normandie, GREYC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
* <http://www.gnu.org/licenses/>
*
* See AUTHORS for a list of contributors.
*/

/** Minumum width and height of the map window */
var minBoundsSize = 10; // in degrees

var usepopup = false;

var map, select;
var gamma_layer;
var pEPSG4326 = new OpenLayers.Projection("EPSG:4326");
var pEPSG900913 = new OpenLayers.Projection("EPSG:900913");

function gamma_init() {
map = new OpenLayers.Map ("map", {
controls:[
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.PanPanel(),
new OpenLayers.Control.LayerSwitcher(),
new OpenLayers.Control.Attribution(),
// new OpenLayers.Control.Permalink(),
new OpenLayers.Control.ScaleLine(),
new OpenLayers.Control.OverviewMap(),
new OpenLayers.Control.MousePosition()],
maxResolution: 156543.0399,
numZoomLevels: 19,
// units: 'm',
projection: new OpenLayers.Projection("EPSG:900913"),
displayProjection: new OpenLayers.Projection("EPSG:4326")
} );

var mapnik = new OpenLayers.Layer.OSM("OpenStreetMap (Mapnik)");

map.addLayer(mapnik);

gamma_layer = new OpenLayers.Layer.Vector("Overlay", {
styleMap: new OpenLayers.StyleMap({
"default": new OpenLayers.Style({
graphicName: "circle",
pointRadius: 5,
fillOpacity: 0.5,
fillColor: "#ffcc66",
strokeColor: "#666633",
strokeWidth: 1
})
})
});
map.addLayer(gamma_layer);

// select
var select_layer = gamma_layer;
select = new OpenLayers.Control.SelectFeature(select_layer);

select_layer.events.on({
"featureselected": onFeatureSelect,
"featureunselected": onFeatureUnselect
});

map.addControl(select);
select.activate();

}

function addPoint(layer, loc, ids) {
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var p = newPoint(loc);
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p.transform(pEPSG4326, pEPSG900913);
var feature = new OpenLayers.Feature.Vector(p);
feature.attributes.id = ids;
layer.addFeatures(feature);
}

function onPopupClose(evt) {
select.unselectAll();
}

function onFeatureSelect(event) {
var feature = event.feature;
var ids = feature.attributes.id.split(" ");
for (var i = ids.length-1; i >=0; --i)
hilightElementById(ids[i]);
if (usepopup) {
var popup = new OpenLayers.Popup.FramedCloud("chicken",
feature.geometry.getBounds().getCenterLonLat(),
new OpenLayers.Size(100,100),
"<h2>"+feature.attributes.name + "</h2>" + feature.attributes.description,
null, true, onPopupClose
);
feature.popup = popup;
map.addPopup(popup);
}
}

function onFeatureUnselect(event) {
var feature = event.feature;
var ids = feature.attributes.id.split(" ");
for (var i = ids.length-1; i >=0; --i)
unhilightElementById(ids[i]);
if(feature.popup) {
map.removePopup(feature.popup);
feature.popup.destroy();
delete feature.popup;
}
}
function hilightElementById(id) {
var div = document.getElementById(id);
if (div != null) {
div.className += " selected";
window.location = "#"+id;
}
}
function unhilightElementById(id) {
var div = document.getElementById(id);
if (div != null)
div.className = div.className.replace(" selected", "");
}

function getLocationExtension(elems) {
for (var i = elems.length-1; i >=0; --i) {
if (elems[i].className == "queryEpcis event extensions"
|| elems[i].className == "trace event extensions") {
// we suppose span extensionValue follows immediatetly span extensionName
var l = elems[i].children.length;
for (var j = 0; j < l; ++j) {
if (elems[i].children[j].textContent == "http://www.opengis.net/kml/2.2##location")
return elems[i].children[j+1].textContent;
}
}
}
}

/**
* This function :
* adds to the gamma_layer of the map :
* - a lineString figuring the route defined by the events
* - a point for each different location
* adds to each div of class className, a clickable div
* that will highlight the location of the event on the companion map
*/
function initShowOnMap(className) {
/** locations and id of the div of class className */
var locationsAndIds = [];
/** the div of class className */
var elems = document.getElementsByClassName(className);
for (var i = 0; i < elems.length; i++) {
var children = elems[i].children;
if (elems[i].children.length > 0) {
var loc = getLocationExtension(elems[i].children);
if (loc != null)
locationsAndIds.push({loc: loc, id: elems[i].id});
var newDiv = document.createElement("div");
newDiv.className = "event showOnMap display";
newDiv.setAttribute("onclick", "showOnMap(this)");
newDiv.textContent = " [Show on Map] ";
elems[i].insertBefore(newDiv, elems[i].firstChild);
}
}
// add route and init bounds
var points = [];
var bounds = null;
for (var k = 0; k < locationsAndIds.length; ++k) {
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var p = newPoint(locationsAndIds[k].loc);
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if (bounds == null)
bounds = new OpenLayers.Bounds(p.x, p.y, p.x, p.y);
else
bounds.extend(p);
p.transform(pEPSG4326, pEPSG900913);
points.push(p);
}
var feature = new OpenLayers.Feature.Vector(new OpenLayers.Geometry.LineString(points));
gamma_layer.addFeatures(feature);

// extend bounds width and height to minBoundsSize
if (bounds.getWidth() < minBoundsSize) {
bounds.extend(new OpenLayers.Geometry.Point(bounds.left-minBoundsSize/2, bounds.top));
bounds.extend(new OpenLayers.Geometry.Point(bounds.right+minBoundsSize/2, bounds.top));
}
if (bounds.getHeight() < minBoundsSize) {
bounds.extend(new OpenLayers.Geometry.Point(bounds.left, bounds.bottom-minBoundsSize/2));
bounds.extend(new OpenLayers.Geometry.Point(bounds.left, bounds.top+minBoundsSize/2));
}
map.zoomToExtent(bounds.transform(map.displayProjection, map.projection));

// add points
locationsAndIds.sort(function(a, b){
var locA=a.loc, locB=b.loc;
if (locA < locB) //sort string ascending
return -1;
if (locA > locB)
return 1;
return 0; //default return value (no sorting)
});
var currentloc = "", currentids = "";
for (var k = 0; k < locationsAndIds.length; ++k) {
if (locationsAndIds[k].loc == currentloc) {
// same location : record id and continue
currentids += " " + locationsAndIds[k].id;
continue;
}
if (currentloc != "") // add geom
addPoint(gamma_layer, currentloc, currentids);
// record new loc and id
currentloc = locationsAndIds[k].loc;
currentids = locationsAndIds[k].id;
}
if (currentloc != "") // add last geom
addPoint(gamma_layer, currentloc, currentids);

}

function getById(vector, id) {
for(var i = vector.length -1; i >= 0; --i) {
var ids = vector[i].attributes.id.split(" ");
for (var k = ids.length-1; k >=0; --k)
if (ids[k] == id)
return vector[i];
}
return null;
}

function showOnMap(evtElem) {
var feature = getById(gamma_layer.features, evtElem.parentElement.id);
if (feature == null)
return;
select.unselectAll();
select.select(feature);
}
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function newPoint(loc) {
var ll = loc.split(",");
var lat = parseInt(ll[0], 10);
var lon = parseInt(ll[1], 10);
return new OpenLayers.Geometry.Point(lon, lat);
}