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/*
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Author: Andreas Hocevar andreas.hocevarATgmail.com
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id: GmlRendererOL.js 3962 2008-04-01 13:21:42Z ahocevar $
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*/
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// Ensure this object's dependancies are loaded.
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mapbuilder.loadScript(baseDir+"/widget/GmlRendererBase.js");
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/**
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* Render GML into HTML.
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* this.targetModel references the context model for the map
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* where the content of this widget should be rendered to.
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* If the model doc is not wfs compliant, a stylesheet
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* property has to be set for this widget. The xsl file
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* referenced in this property transforms the model doc to
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* a wfs FeatureCollection.
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* @constructor
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* @base GmlRendererBase
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* @param widgetNode The widget's XML object node from the configuration document.
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* @param model The model object that this widget belongs to.
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*/
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function GmlRendererOL(widgetNode, model) {
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GmlRendererBase.apply(this,new Array(widgetNode, model));
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// create modified OpenLayers GML layer class, which
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// uses a gml doc directly instead of loading it from
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// an URL
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var OlLayer = OpenLayers.Class(OpenLayers.Layer.GML, {
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loadGML: function() {
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if (!this.loaded) {
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var gml = new OpenLayers.Format.GML();
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try {
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this.proj = this.projection;
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this.addFeatures(gml.read(this.mbWidget.renderDoc));
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this.loaded = true;
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} catch (e) {
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alert(mbGetMessage("documentParseError"),
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new XMLSerializer().serializeToString(this.mbWidget.renderDoc));
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}
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}
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},
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// let the layer always be visible, independent of the resolution
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calculateInRange: function() {
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return true;
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},
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// make destroyFeatures bullet-proof to work with undefined geometries
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destroyFeatures: function() {
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var features = this.features;
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var featuresToRemove = [];
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var feature;
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for (var i=0; i<features.length; i++) {
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feature = features[i];
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feature.mbWidgetConfig = null;
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if (!feature.geometry) {
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featuresToRemove.push(feature);
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}
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}
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this.removeFeatures(featuresToRemove);
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for (var i=0; i<featuresToRemove.length; i++) {
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featuresToRemove[i].destroy();
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}
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OpenLayers.Layer.GML.prototype.destroyFeatures.apply(this, arguments);
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},
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preFeatureInsert: function(feature) {
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if (feature.geometry) {
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// check if there is a source model linked with this feature
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var sourceNode = this.mbWidget.model.doc.selectSingleNode("//*[@fid='"+feature.fid+"']");
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var sourceModel = null;
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if (sourceNode) {
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sourceModel = sourceNode.getAttribute('sourceModel');
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}
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// if so, use the config from the source model
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var widgetConfig = null;
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if (sourceModel && config.objects[sourceModel].config && config.objects[sourceModel].config[this.mbWidget.id]) {
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widgetConfig = config.objects[sourceModel].config[this.mbWidget.id];
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} else {
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widgetConfig = this.mbWidget.config;
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}
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feature.mbWidgetConfig = widgetConfig;
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if (!widgetConfig.sourceSRS) {
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if (widgetConfig.featureSRS) {
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widgetConfig.sourceSRS = new OpenLayers.Projection(widgetConfig.featureSRS);
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} else {
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widgetConfig.sourceSRS = null;
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}
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}
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//in the future this will be handled internally to OpenLayers
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if (widgetConfig.sourceSRS) {
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this.convertPoints(feature.geometry, widgetConfig.sourceSRS);
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}
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}
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},
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drawFeature: function(feature, style) {
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// set styles before rendering the feature
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var widgetConfig = feature.mbWidgetConfig;
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if (widgetConfig) {
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feature.style = null;
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if (widgetConfig.defaultStyle && style != "select") {
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feature.style = widgetConfig.defaultStyle.createSymbolizer ?
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widgetConfig.defaultStyle.createSymbolizer(feature) :
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widgetConfig.defaultStyle;
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}
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// set select styles
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if (widgetConfig && widgetConfig.selectStyle) {
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feature.mbSelectStyle = widgetConfig.selectStyle;
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}
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}
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OpenLayers.Layer.GML.prototype.drawFeature.apply(this, arguments);
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},
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convertPoints: function(component, sourceSRS) {
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if (component.CLASS_NAME == 'OpenLayers.Geometry.Point') {
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component.transform(sourceSRS, this.proj);
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} else {
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for (var i=0; i<component.components.length; ++i) {
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this.convertPoints(component.components[i], sourceSRS);
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}
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}
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},
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/**
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* gets a feature from the gmlRendererLayer by GML feature id.
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* @param fid GML feature id of the feature
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* @return feature OpenLayers feature matching fid
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*/
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getFeatureByFid: function(fid) {
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if (!this.features) {
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return null;
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}
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for (var i = 0; i < this.features.length; ++i) {
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if (this.features[i].fid == fid) {
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return this.features[i];
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}
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}
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},
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destroy: function() {
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this.mbWidget = null;
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OpenLayers.Layer.Vector.prototype.destroy.apply(this, arguments);
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}
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});
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/** OpenLayers GML layer which renders the model doc */
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this.olLayer = null;
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/**
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* Style object for default renderer styling of features.
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* This holds one style for each OpenLayers feature class
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*/
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this.defaultStyle = null;
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/**
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* Style object for default renderer styling of features.
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* This holds one style for each OpenLayers feature class
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*/
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this.selectStyle = null;
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/**
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* Features that shall not be drawn
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*/
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this.hiddenFeatures = new Array();
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// replacement for deprecated MapContainerBase
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this.containerNodeId = this.htmlTagId;
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model.containerModel = this.targetModel;
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// Set this.stylesheet. This is taken from WidgetBaseXSL.js
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if ( !this.stylesheet ) {
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var styleNode = widgetNode.selectSingleNode("mb:stylesheet");
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if (styleNode) {
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this.stylesheet = new XslProcessor(getNodeValue(styleNode), model.namespace);
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this.stylesheet.setParameter("proxyUrl", config.proxyUrl);
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}
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}
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// set the hover cursor.
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this.hoverCursor = this.getProperty('mb:hoverCursor', 'pointer');
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this.paint = function(objRef) {
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if (objRef.targetModel.map) {
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// remove features from layer
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if (objRef.olLayer) {
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objRef.model.setParam('gmlRendererLayer', null);
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}
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// transform the model using the xsl stylesheet if there is one,
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// otherwise just take the model doc.
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objRef.renderDoc = objRef.stylesheet ? objRef.stylesheet.transformNodeToObject(objRef.model.doc) : objRef.model.doc;
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// nothing to do here if there is no model doc
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if (!objRef.renderDoc) {
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return;
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}
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// keep a reference to the map we created the layer for
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objRef.map = objRef.targetModel.map;
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// add own model to array of configurations
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var models = [objRef.model];
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// get configurations from source models, if any
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if (objRef.model.mergeModels) {
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for (var i=0; i<objRef.model.mergeModels.length; i++) {
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models.push(objRef.model.mergeModels[i]);
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}
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}
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// store configurations for each source model
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for (var i = 0; i < models.length; i++) {
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var widgetConfig = config.objects[models[i].id].config ? config.objects[models[i].id].config[objRef.id] : null;
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if (!widgetConfig) {
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widgetConfig = objRef.config;
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}
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if (widgetConfig.sldModelNode) {
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var sldModel = config.objects[getNodeValue(widgetConfig.sldModelNode)];
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if (sldModel) {
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sldModel.addListener("loadModel", objRef.paint, objRef);
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if (!sldModel.doc) {
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return;
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}
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var sldNode = sldModel.getSldNode();
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if (sldModel.sld) {
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var namedLayer = sldModel.sld.namedLayers[objRef.id].userStyles;
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for (var j=0; j<namedLayer.length; ++j) {
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namedLayer[j].propertyStyles = namedLayer[j].findPropertyStyles();
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if (namedLayer[j].name == widgetConfig.defaultStyleName) {
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widgetConfig.defaultStyle = namedLayer[j];
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}
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if (namedLayer[j].name == widgetConfig.selectStyleName) {
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widgetConfig.selectStyle = namedLayer[j];
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}
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}
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if (widgetConfig.selectStyle) {
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widgetConfig.selectStyle.defaultStyle.cursor = objRef.hoverCursor;
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}
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} else if (sldNode) {
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widgetConfig.defaultStyle =
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sld2OlStyle(sldNode.selectSingleNode("//*[wmc:Name='"+widgetConfig.defaultStyleName+"']"));
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widgetConfig.selectStyle =
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sld2OlStyle(sldNode.selectSingleNode("//*[wmc:Name='"+widgetConfig.selectStyleName+"']"));
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if (widgetConfig.selectStyle) {
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widgetConfig.selectStyle.cursor = objRef.hoverCursor;
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}
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}
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}
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}
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}
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if (!objRef.olLayer || !objRef.olLayer.mbWidget) {
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objRef.olLayer = new OlLayer(objRef.id, null, {mbWidget: objRef});
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objRef.targetModel.map.addLayer(objRef.olLayer);
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} else {
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objRef.olLayer.loaded = false;
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objRef.olLayer.destroyFeatures();
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objRef.olLayer.loadGML();
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}
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objRef.removeHiddenFeatures(objRef);
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objRef.model.setParam('gmlRendererLayer', objRef.olLayer);
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}
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// We add a refresh listener to the targetModel. This way we
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// can be sure that the gml renderer is reloaded when the
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// map is refreshed, and also if the map did not exist yet
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// when paint was called for the first time.
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objRef.targetModel.addListener('refresh', objRef.paint, objRef);
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}
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this.model.addListener("refresh",this.paint, this);
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/**
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* Called when the context's hidden attribute changes.
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* @param objRef This object.
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* @param layerName The name of the layer that was toggled.
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*/
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this.hiddenListener=function(objRef, layerName){
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//TBD not yet implemented
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alert('hide/unhide '+layerName);
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}
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this.model.addListener("hidden",this.hiddenListener,this);
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/**
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* Hides the feature specified by its fid from the map
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* @param objRef this widget
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* @param fid feature id of the feature to hide. If it is null,
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* the hideFeature param of the model will be used.
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*/
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this.hideFeature = function(objRef, fid) {
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if (!fid) {
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fid = objRef.model.getParam('hideFeature');
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}
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var feature = objRef.olLayer.getFeatureByFid(fid);
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if (feature) {
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objRef.hiddenFeatures.push(fid);
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// mark the feature as hidden - this will be checked by other widgets
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feature.mbHidden = true;
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objRef.olLayer.renderer.eraseGeometry(feature.geometry);
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}
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}
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this.model.addListener("hideFeature", this.hideFeature, this);
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/**
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* Shows the feature specified by its fid in the map
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* @param objRef this widget
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* @param fid feature id of the feature to show. If it is null,
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* the showFeature param of the model will be used.
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*/
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this.showFeature = function(objRef, fid) {
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if (!fid) {
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fid = objRef.model.getParam('showFeature');
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}
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var feature = objRef.olLayer.getFeatureByFid(fid);
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if (feature) {
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OpenLayers.Util.removeItem(objRef.hiddenFeatures, fid);
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// mark the feature as visible - this will be checked by other widgets
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feature.mbHidden = false;
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objRef.olLayer.drawFeature(feature);
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}
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}
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this.model.addListener("showFeature", this.showFeature, this);
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this.removeHiddenFeatures = function(objRef) {
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if (objRef.olLayer) {
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// remove hidden features
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var hiddenFeatures = objRef.hiddenFeatures.toString().split(/,/);
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objRef.hiddenFeatures = new Array();
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for (var i=0; i<hiddenFeatures.length; i++) {
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if (hiddenFeatures[i]) {
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objRef.hideFeature(objRef, hiddenFeatures[i]);
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}
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}
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}
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}
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337
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/**
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* Initializes this widget
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* @param objRef This object
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*/
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this.init = function(objRef) {
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var clickWidgetNode = widgetNode.selectSingleNode("mb:featureOnClick");
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if (clickWidgetNode) {
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var clickWidget = config.objects[getNodeValue(clickWidgetNode)];
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objRef.model.addListener("olFeatureSelect", clickWidget.onClick, clickWidget);
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}
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var hoverWidgetNode = widgetNode.selectSingleNode("mb:featureOnHover");
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if (hoverWidgetNode) {
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var hoverWidget = config.objects[getNodeValue(hoverWidgetNode)];
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objRef.model.addListener("olFeatureHover", hoverWidget.onMouseover, hoverWidget);
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objRef.model.addListener("olFeatureOut", hoverWidget.onMouseout, hoverWidget);
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}
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objRef.targetModel.addListener("aoi", objRef.removeHiddenFeatures, objRef);
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}
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this.model.addListener("init", this.init, this);
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this.model.removeListener("newModel", this.clearWidget, this);
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this.clearWidget = function(objRef) {
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if (objRef.olLayer) {
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objRef.olLayer.loaded = false;
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for (var i=0; i<objRef.olLayer.map.controls.length; i++) {
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if (objRef.olLayer.map.controls[i].layer == objRef.olLayer) {
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objRef.olLayer.map.controls[i].destroy();
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}
|
|
365
|
}
|
|
366
|
objRef.olLayer.destroy();
|
|
367
|
objRef.olLayer = null;
|
|
368
|
}
|
|
369
|
}
|
|
370
|
this.model.addListener("newModel", this.clearWidget, this);
|
|
371
|
}
|