ii.sparql.format.treemap.js

spqlib.treemap = ( function () {

	/**
	* Entry point
	*/
	spqlib.sparql2Treemap = function ( config ) {
		if ( !config.sparqlWithPrefixes && config.sparql && config.queryPrefixes ) {
			config.sparqlWithPrefixes = spqlib.util.addPrefixes( config.sparql, config.queryPrefixes );
		}
		this.util.doQuery( config.endpoint, config.endpointName, config.sparqlWithPrefixes, spqlib.treemap.render, config, spqlib.treemap.preQuery, spqlib.treemap.failQuery );
	};

	var my = { };

	my.chartImpl = function () {
		return spqlib.d3();
	};

	my.exportAsImage = function () {
	};

	my.toggleFullScreen = function ( graphId ) {
		var graphDiv = $( '#' + graphId + '-container' ),
		 cssClass = this.config.divCssClass,
		 cssClassFullScreen = this.config.divCssClassFullScreen;
		graphDiv.toggleClass( cssClass );
		graphDiv.toggleClass( cssClassFullScreen );
		this.resize( this.res, this.config );
	};

	my.preQuery = function ( configuration ) {
		$( '#' + configuration.divId + '-legend' ).hide();
		if ( configuration.spinnerImagePath ) {
			$( '#' + configuration.divId ).html( "<div class='loader'><img src='" + configuration.spinnerImagePath + "' style='vertical-align:middle;'></div>" );
		} else {
			$( '#' + configuration.divId ).html( 'Loading...' );
		}
	};

	my.failQuery = function ( configuration, jqXHR, textStatus ) {
		$( '#' + configuration.divId ).html( '' );
		$( '#' + configuration.divId ).html( spqlib.util.generateErrorBox( textStatus ) );
		throw new Error( 'Error invoking sparql endpoint ' + textStatus + ' ' + JSON.stringify( jqXHR ) );
	};

	/**
	 * funzione di callback di default dopo la chiamata ajax all'endpoint sparql.
	 */
	my.render = function ( json, config ) {
		$( '#' + config.divId + '-legend' ).show();
		$( '#' + config.divId ).html( '' );
		var head = json.head.vars,
		 data = json.results.bindings;
		if ( !head || head.length < 2 ) {
			throw 'Too few fields in sparql result. Need at least 2 columns';
		}
		var parent_label_field = head[ 0 ],
		 child_label_field = head[ 1 ],
		 value_field = ( head[ 2 ] ? head[ 2 ] : false ),
		 obj = {};

		for ( var i = 0; i < data.length; i++ ) {
			var parent = spqlib.util.getSparqlFieldValue( data[ i ][ parent_label_field ] );
			if ( !obj[ parent ] ) {
				obj[ parent ] = { name: parent, children: [] };
			}
			var child = spqlib.util.getSparqlFieldValue( data[ i ][ child_label_field ] ),
			 val = 1;
			if ( value_field ) {
				val = spqlib.util.getSparqlFieldValueToNumber( data[ i ][ value_field ] );
				if ( val == '' ) { val = 1; }
			}
			if ( !obj[ child ] ) {
				obj[ child ] = { name: parent, children: [], value: val };
			}
			obj[ parent ].children.push( child );
		}
		var root = config.rootElement,
		 res = createStructure( root, obj, config ),
		 chartId = config.divId,
		 chart = {
				res: res,
				config: config,
				resize: spqlib.treemap.chartImpl().drawTreemap,
				toggleFullScreen: spqlib.treemap.toggleFullScreen
			};
		$( '#headertabs ul li a' ).on(
			'click',
			function ( event, ui ) {
				var tabDivId = $( this ).attr( 'href' ),
					 t = $( tabDivId ).find(
						'.sparqlresultformat-treemap' );
				t.each( function () {
					var id = $( this ).attr( 'id' ),
						 c = spqlib.getById( id );
					if ( c ) {
						c.resize(c.res,c.config);
					}
				} );
			} );
		spqlib.treemap.chartImpl().drawTreemap( res, config );
		spqlib.addToRegistry( chartId, chart );
	};

	function createStructure( elem, obj, config ) {
		var res = { name: elem, children: [] };
		if ( obj[ elem ].children.length == 0 ) {
			// è una foglia
			var url = '',
			 linkPattern = config.leavesLinkPattern;
			if ( linkPattern ) {
				url = spqlib.util.formatString( linkPattern, elem );
			} else if ( config.linkBasePath ) {
				url = config.linkBasePath + elem;
			}
			return { name: elem, value: obj[ elem ].value, url: url };
		}
		for ( var i = 0; i < obj[ elem ].children.length; i++ ) {
			var child = obj[ elem ].children[ i ];
			res.children.push( createStructure( child, obj, config ) );
		}
		return res;
	}

	return my;
}() );