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Template:GraphHeader/GraphCreator.js
From 2009.igem.org
var loaded = 0;
function onLoadCallback() {
loaded++;
if (loaded==2) {
createGraphs();
}
}
google.load('visualization', '1', {'packages':['scatterchart']}); google.setOnLoadCallback(onLoadCallback);
dojo.require("dojox.charting.Chart2D"); dojo.require("dojox.charting.widget.Legend"); dojo.addOnLoad(onLoadCallback);
function loadGraphs() {
var graphs = dojo.query('.graph');
for(var g=0; g<graphs.length; g++) {
loadGraph(graphs[g]);
}
}
function loadGraph(graph) {
var links = dojo.query('a',graph);
if (links.length!=1) return; // TODO: Nicer error handling?
dojo.xhrGet( {
url: links[0].href,
content: {action: 'raw', templates: 'expand'},
preventCache: true,
handleAs: "json",
load: function(responseObject, ioArgs) {
createGraph(graph, responseObject);
},
error: function(responseObject, ioArgs) {
graph.innerHTML = ;
graph.appendChild(document.createTextNode('Error loading '));
graph.appendChild(links[0]);
graph.appendChild(document.createTextNode('!'));
graph.appendChild(document.createElement('br'));
graph.appendChild(document.createTextNode(responseObject.message));
}
});
}
function createGraph(graph, desc) {
// Some layout stuff graph.innerHTML = ;
// Create div's for graph
var chartDiv = document.createElement('div');
chartDiv.style.textAlign = 'left';
chartDiv.style.width = desc.width;
chartDiv.style.height = desc.height;
graph.appendChild(chartDiv);
graph.style.width = chartDiv.style.width;
var legendCenter = document.createElement('center');
graph.appendChild(legendCenter);
var legendDiv = document.createElement('div');
legendCenter.appendChild(legendDiv);
// Create chart and legend
var chart = new dojox.charting.Chart2D(chartDiv);
for(var a in desc.axes) {
chart.addAxis(a, desc.axes[a]);
}
for(var p in desc.plots) {
chart.addPlot(p, desc.plots[p]);
}
var legend = new dojox.charting.widget.Legend({chart: chart}, legendDiv);
// Query spreadsheet and let result be drawn
var query = new google.visualization.Query(desc.datasource);
query.send(function(response){drawGraph(desc,chart,legend,response);});
}
function drawGraph(desc,chart,legend,response) {
if (response.isError()) {
alert('Error in query: ' + response.getMessage() + ' ' + response.getDetailedMessage());
return;
}
var data = response.getDataTable();
var series = dojoSeriesFromDataTable(data,desc.series);
for(var i=0; i<series.length; i++) {
chart.addSeries(series[i].title, series[i].data, series[i].args);
}
chart.render();
legend.refresh();
}
function dojoSeriesFromDataTable(dataTable,series) {
var dojoSeriesArray = [];
for(var s=0; s<series.length; s++) {
var xc = series[s].x, yc = series[s].y;
var dojoSeries = [];
for(var r=0; r<dataTable.getNumberOfRows(); r++) {
dojoSeries.push({x: dataTable.getValue(r,xc), y: dataTable.getValue(r,yc)});
}
dojoSeriesArray.push({title: series[s].title===undefined ?
dataTable.getColumnLabel(yc) : series[s].title,
data: dojoSeries,
args: getSeriesArgs(series[s])});
}
return dojoSeriesArray;
}
function getSeriesArgs(series) {
var args = {};
for(var p in series) {
if (p=='title' || p=='x' || p=='y') continue;
args[p] = series[p];
}
return args;
}
