JavaScript
google.charts.load('current', {packages: ['corechart', 'line']});
google.charts.setOnLoadCallback(drawLegendChart);
function drawLegendChart() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'Day');
data.addColumn('number', 'Guardians of the Galaxy');
data.addColumn('number', 'The Avengers');
data.addColumn('number', 'Transformers: Age of Extinction');
data.addRows([
[1, 37.8, 80.8, 41.8],
[2, 30.9, 69.5, 32.4],
[3, 25.4, 57, 25.7],
[4, 11.7, 18.8, 10.5],
[5, 11.9, 17.6, 10.4],
[6, 8.8, 13.6, 7.7],
[7, 7.6, 12.3, 9.6],
[8, 12.3, 29.2, 10.6],
[12, 6.6, 8.4, 5.2],
[13, 4.8, 6.3, 3.6],
[14, 4.2, 6.2, 3.4]
]);
var options = {
title: 'Box Office Earnings in First Two Weeks of Opening',
width: 900,
height: 300,
chartArea: {
backgroundColor: 'black',
left: 50
},
lineWidth: 4,
focusTarget: 'category',
hAxis: {
viewWindowMode: 'pretty'
},
vAxis: {
viewWindow: {
max: 100
}
}
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
var columns = [];
var series = {};
for (var i = 0; i < data.getNumberOfColumns(); i++) {
columns.push(i);
if (i > 0) {
series[i - 1] = {};
}
};
google.visualization.events.addListener(chart, 'select', function () {
var sel = chart.getSelection();
if (sel.length > 0) {
if (sel[0].row === null) {
var col = sel[0].column;
if (columns[col] == col) {
columns[col] = {
label: data.getColumnLabel(col),
type: data.getColumnType(col),
calc: function () {
...