dcd05d13ce
git-svn-id: http://svn.openlayers.org/tags/openlayers/release-2.4-rc5@3182 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
314 lines
9.7 KiB
JavaScript
314 lines
9.7 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
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* for the full text of the license. */
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/**
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* @class
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*
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* @requires OpenLayers/Layer.js
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* @requires OpenLayers/Util.js
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*/
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OpenLayers.Layer.EventPane = OpenLayers.Class.create();
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OpenLayers.Layer.EventPane.prototype =
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OpenLayers.Class.inherit( OpenLayers.Layer, {
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/** EventPaned layers are always base layers, by necessity.
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*
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* @type Boolean */
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isBaseLayer: true,
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/** EventPaned layers are fixed by default.
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*
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* @type Boolean */
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isFixed: true,
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/** @type DOMElement */
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pane: null,
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/** This is the object which will be used to load the 3rd party library
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* in the case of the google layer, this will be of type GMap,
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* in the case of the ve layer, this will be of type VEMap
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*
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* @type Object */
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mapObject: null,
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/**
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* @constructor
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*
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* @param {String} name
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* @param {Object} options Hashtable of extra options to tag onto the layer
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*/
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initialize: function(name, options) {
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OpenLayers.Layer.prototype.initialize.apply(this, arguments);
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if (this.pane == null) {
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this.pane = OpenLayers.Util.createDiv(this.div.id + "_EventPane");
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}
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},
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/**
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*
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*/
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destroy: function() {
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this.mapObject = null;
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OpenLayers.Layer.prototype.destroy.apply(this, arguments);
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},
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/** Set the map property for the layer. This is done through an accessor
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* so that subclasses can override this and take special action once
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* they have their map variable set.
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*
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* @param {OpenLayers.Map} map
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*/
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setMap: function(map) {
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OpenLayers.Layer.prototype.setMap.apply(this, arguments);
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this.pane.style.zIndex = parseInt(this.div.style.zIndex) + 1;
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this.pane.style.display = this.div.style.display;
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this.pane.style.width="100%";
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this.pane.style.height="100%";
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if (/MSIE/.test(navigator.userAgent)) {
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this.pane.style.background = "url("+OpenLayers.Util.getImagesLocation()+"blank.gif)";
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}
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if (this.isFixed) {
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this.map.viewPortDiv.appendChild(this.pane);
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} else {
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this.map.layerContainerDiv.appendChild(this.pane);
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}
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// once our layer has been added to the map, we can load it
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this.loadMapObject();
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// if map didn't load, display warning
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if (this.mapObject == null) {
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this.loadWarningMessage();
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}
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},
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/** If we can't load the GMap, then display an error message to the
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* user and tell them where to go for help.
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*
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* @private
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*
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*/
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loadWarningMessage:function() {
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this.div.style.backgroundColor = "darkblue";
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var viewSize = this.map.getSize();
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msgW = Math.min(viewSize.w, 300);
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msgH = Math.min(viewSize.h, 200);
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var size = new OpenLayers.Size(msgW, msgH);
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var centerPx = new OpenLayers.Pixel(viewSize.w/2, viewSize.h/2);
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var topLeft = centerPx.add(-size.w/2, -size.h/2);
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var div = OpenLayers.Util.createDiv(this.name + "_warning",
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topLeft,
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size,
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null,
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null,
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null,
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"auto");
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div.style.padding = "7px";
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div.style.backgroundColor = "yellow";
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div.innerHTML = this.getWarningHTML();
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this.div.appendChild(div);
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},
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/**
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* @param {Boolean} display
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*/
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display: function(display) {
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OpenLayers.Layer.prototype.display.apply(this, arguments);
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this.pane.style.display = this.div.style.display;
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},
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/**
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* @param {int} zIndex
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*/
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setZIndex: function (zIndex) {
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OpenLayers.Layer.prototype.setZIndex.apply(this, arguments);
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this.pane.style.zIndex = parseInt(this.div.style.zIndex) + 1;
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},
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/**
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* @param {OpenLayers.Bounds} bounds
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* @param {Boolean} zoomChanged
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* @param {Boolean} dragging
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*/
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moveTo:function(bounds, zoomChanged, dragging) {
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OpenLayers.Layer.prototype.moveTo.apply(this, arguments);
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if (this.mapObject != null) {
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var newCenter = this.map.getCenter();
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var newZoom = this.map.getZoom();
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if (newCenter != null) {
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var moOldCenter = this.getMapObjectCenter();
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var oldCenter = this.getOLLonLatFromMapObjectLonLat(moOldCenter);
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var moOldZoom = this.getMapObjectZoom();
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var oldZoom= this.getOLZoomFromMapObjectZoom(moOldZoom);
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if ( !(newCenter.equals(oldCenter)) ||
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!(newZoom == oldZoom) ) {
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var center = this.getMapObjectLonLatFromOLLonLat(newCenter);
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var zoom = this.getMapObjectZoomFromOLZoom(newZoom);
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this.setMapObjectCenter(center, zoom);
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}
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}
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}
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},
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/********************************************************/
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/* */
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/* Baselayer Functions */
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/* */
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/********************************************************/
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/**
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* @param {OpenLayers.Pixel} viewPortPx
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*
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* @returns An OpenLayers.LonLat which is the passed-in view port
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* OpenLayers.Pixel, translated into lon/lat by GMAPS
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* If gmap is not loaded or not centered, returns null
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* @type OpenLayers.LonLat
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*/
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getLonLatFromViewPortPx: function (viewPortPx) {
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var lonlat = null;
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if ( (this.mapObject != null) &&
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(this.getMapObjectCenter() != null) ) {
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var moPixel = this.getMapObjectPixelFromOLPixel(viewPortPx);
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var moLonLat = this.getMapObjectLonLatFromMapObjectPixel(moPixel)
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lonlat = this.getOLLonLatFromMapObjectLonLat(moLonLat);
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}
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return lonlat;
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},
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/**
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* @param {OpenLayers.LonLat} lonlat
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*
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* @returns An OpenLayers.Pixel which is the passed-in OpenLayers.LonLat,
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* translated into view port pixels BY GMAPS
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* If gmap is not loaded or not centered, returns null
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* @type OpenLayers.Pixel
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*/
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getViewPortPxFromLonLat: function (lonlat) {
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var viewPortPx = null;
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if ( (this.mapObject != null) &&
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(this.getMapObjectCenter() != null) ) {
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var moLonLat = this.getMapObjectLonLatFromOLLonLat(lonlat);
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var moPixel = this.getMapObjectPixelFromMapObjectLonLat(moLonLat)
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viewPortPx = this.getOLPixelFromMapObjectPixel(moPixel);
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}
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return viewPortPx;
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},
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/********************************************************/
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/* */
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/* Translation Functions */
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/* */
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/* The following functions translate Map Object and */
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/* OL formats for Pixel, LonLat */
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/* */
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/********************************************************/
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//
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// TRANSLATION: MapObject LatLng <-> OpenLayers.LonLat
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//
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/**
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* @param {Object} moLonLat
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*
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* @returns An OpenLayers.LonLat, translated from the passed in
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* MapObject LonLat
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* Returns null if null value is passed in
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* @type OpenLayers.LonLat
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*/
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getOLLonLatFromMapObjectLonLat: function(moLonLat) {
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var olLonLat = null;
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if (moLonLat != null) {
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var lon = this.getLongitudeFromMapObjectLonLat(moLonLat);
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var lat = this.getLatitudeFromMapObjectLonLat(moLonLat);
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olLonLat = new OpenLayers.LonLat(lon, lat);
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}
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return olLonLat;
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},
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/**
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* @param {OpenLayers.LonLat} olLonLat
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*
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* @returns A MapObject LonLat, translated from the passed in
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* OpenLayers.LonLat
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* Returns null if null value is passed in
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* @type Object
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*/
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getMapObjectLonLatFromOLLonLat: function(olLonLat) {
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var moLatLng = null;
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if (olLonLat != null) {
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moLatLng = this.getMapObjectLonLatFromLonLat(olLonLat.lon,
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olLonLat.lat);
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}
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return moLatLng;
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},
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//
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// TRANSLATION: MapObject Pixel <-> OpenLayers.Pixel
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//
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/**
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* @param {Object} moPixel
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*
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* @returns An OpenLayers.Pixel, translated from the passed in
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* MapObject Pixel
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* Returns null if null value is passed in
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* @type OpenLayers.Pixel
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*/
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getOLPixelFromMapObjectPixel: function(moPixel) {
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var olPixel = null;
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if (moPixel != null) {
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var x = this.getXFromMapObjectPixel(moPixel);
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var y = this.getYFromMapObjectPixel(moPixel);
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olPixel = new OpenLayers.Pixel(x, y);
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}
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return olPixel;
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},
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/**
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* @param {OpenLayers.Pixel} olPixel
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*
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* @returns A MapObject Pixel, translated from the passed in
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* OpenLayers.Pixel
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* Returns null if null value is passed in
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* @type Object
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*/
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getMapObjectPixelFromOLPixel: function(olPixel) {
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var moPixel = null;
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if (olPixel != null) {
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moPixel = this.getMapObjectPixelFromXY(olPixel.x, olPixel.y);
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}
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return moPixel;
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Layer.EventPane"
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});
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