How can I extract row entry width of Google Chart - javascript

I'm having difficulty extracting the width of a selected row on a Google Gantt chart. To further elaborate I need the width of the singular data row, which I can see in the code behind under the 'rect' tag however not sure how to properly call the syntax for width retrieval.
ganttchart


first, wait for the chart's 'ready' event to fire.
then we can get the <rect> elements from the chart.
there will be other <rect> elements, besides those that represent a row.
such as the chart area, etc.
we can filter those out by fill color...
google.visualization.events.addOneTimeListener(chart, 'ready', function () {
var rows = container.getElementsByTagName('rect');
var bars = [];
Array.prototype.forEach.call(rows, function(row) {
switch (row.getAttribute('fill')) {
case '#ffffff':
case '#f5f5f5':
case 'none':
// ignore
break;
default:
bars.push(row);
}
});
if (bars.length > 0) {
console.log(parseFloat(bars[0].getAttribute('width')));
}
});
see following working snippet...
google.charts.load('current', {
packages:['gantt']
}).then(function () {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Task ID');
data.addColumn('string', 'Task Name');
data.addColumn('string', 'Resource');
data.addColumn('date', 'Start Date');
data.addColumn('date', 'End Date');
data.addColumn('number', 'Duration');
data.addColumn('number', 'Percent Complete');
data.addColumn('string', 'Dependencies');
data.addRows([
['2014Spring', 'Spring 2014', 'spring',
new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null],
['2014Summer', 'Summer 2014', 'summer',
new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null],
['2014Autumn', 'Autumn 2014', 'autumn',
new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null],
['2014Winter', 'Winter 2014', 'winter',
new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null],
['2015Spring', 'Spring 2015', 'spring',
new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null],
['2015Summer', 'Summer 2015', 'summer',
new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null],
['2015Autumn', 'Autumn 2015', 'autumn',
new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null],
['2015Winter', 'Winter 2015', 'winter',
new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null],
['Football', 'Football Season', 'sports',
new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null],
['Baseball', 'Baseball Season', 'sports',
new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null],
['Basketball', 'Basketball Season', 'sports',
new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null],
['Hockey', 'Hockey Season', 'sports',
new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null]
]);
var options = {
height: 400,
gantt: {
trackHeight: 30
}
};
var container = document.getElementById('chart_div');
var chart = new google.visualization.Gantt(container);
google.visualization.events.addOneTimeListener(chart, 'ready', function () {
var rows = container.getElementsByTagName('rect');
var bars = [];
Array.prototype.forEach.call(rows, function(row) {
switch (row.getAttribute('fill')) {
case '#ffffff':
case '#f5f5f5':
case 'none':
// ignore
break;
default:
bars.push(row);
}
});
if (bars.length > 0) {
console.log(parseFloat(bars[0].getAttribute('width')));
}
});
chart.draw(data, options);
function daysToMilliseconds(days) {
return days * 24 * 60 * 60 * 1000;
}
});
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Related

google charts gantt can't get critical path or axis to show up

I am trying to follow along with examples here:
https://developers.google.com/chart/interactive/docs/gallery/ganttchart
My code looks like this:
google.charts.load('current', {'packages':['gantt']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Task ID');
data.addColumn('string', 'Task Name');
data.addColumn('date', 'Start Date');
data.addColumn('date', 'End Date');
data.addColumn('number', 'Duration');
data.addColumn('number', 'Percent Complete');
data.addColumn('string', 'Dependencies');
data.addRows([
['5efbce41802562e233e21b9e',
'Demolition' ,
new Date(2020, 5, 8),
new Date(2020, 6, 24),
null,
100,
''],
['5efbd34a802562e233e21bda',
'Sealing, Flooring' ,
new Date(2020, 6, 27),
new Date(2020, 7, 5),
null,
100,
'5efbce41802562e233e21b9e'],
['5efbd390802562e233e21be6',
'Concrete Work' ,
new Date(2020, 7, 10),
new Date(2020, 7, 14),
null,
100,
'5efbd34a802562e233e21bda'],
['5efbd55e802562e233e21c3c',
'HVAC' ,
new Date(2020, 7, 18),
new Date(2020, 7, 28),
null,
100,
'5efbce41802562e233e21b9e'],
['5efbd55e802562e233e21c43',
'Fire Protection' ,
new Date(2020, 8, 1),
new Date(2020, 8, 11),
null,
100,
'5efbd55e802562e233e21c3c'],
['5efbd55e802562e233e21c4a',
'Framing and Drywalling' ,
new Date(2020, 8, 13),
new Date(2020, 8, 25),
null,
100,
'5efbd55e802562e233e21c3c,5efbd55e802562e233e21c43,5efbd55e802562e233e21c51'],
['5efbd55e802562e233e21c51',
'Electrical Upgrade' ,
new Date(2020, 8, 2),
new Date(2020, 8, 11),
null,
100,
''],
['5efbd55e802562e233e21c58',
'Flooring' ,
new Date(2020, 9, 5),
new Date(2020, 9, 16),
null,
100,
'5efbd390802562e233e21be6'],
['5efbd55e802562e233e21c5f',
'Inspection and Remediation' ,
new Date(2020, 9, 19),
new Date(2020, 9, 30),
null,
100,
'5efbd55e802562e233e21c4a'],
]);
var trackHeight = 40;
var options = {
height: data.getNumberOfRows() * trackHeight + 200,
width: 1024,
gantt: {
criticalPathEnabled: true,
criticalPathStyle: {
stroke: '#e64a19',
strokeWidth: 5
}
};
var chart = new google.visualization.Gantt(document.getElementById('gantt_5efbc530802562d3f4760a1f'));
chart.draw(data, options);
}
But my graph looks like this:
I don't see the axis (legend) as in the example, and i don't see the critical path. Any ideas?
Thanks,
kevin

Change color text gantt chart google ( javascript ) without CSS

How can i change the left text color without use or insert a css ?
This code is the same as documentation.
I know colors depend on resources. I would not change the colors of the activity bars but only the text associated with it.
google.charts.load('current', {'packages':['gantt']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Task ID');
data.addColumn('string', 'Task Name');
data.addColumn('string', 'Resource');
data.addColumn('date', 'Start Date');
data.addColumn('date', 'End Date');
data.addColumn('number', 'Duration');
data.addColumn('number', 'Percent Complete');
data.addColumn('string', 'Dependencies');
data.addRows([
['2014Spring', 'Spring 2014', 'spring',
new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null],
['2014Summer', 'Summer 2014', 'summer',
new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null],
['2014Autumn', 'Autumn 2014', 'autumn',
new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null],
['2014Winter', 'Winter 2014', 'winter',
new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null],
['2015Spring', 'Spring 2015', 'spring',
new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null],
['2015Summer', 'Summer 2015', 'summer',
new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null],
['2015Autumn', 'Autumn 2015', 'autumn',
new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null],
['2015Winter', 'Winter 2015', 'winter',
new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null],
['Football', 'Football Season', 'sports',
new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null],
['Baseball', 'Baseball Season', 'sports',
new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null],
['Basketball', 'Basketball Season', 'sports',
new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null],
['Hockey', 'Hockey Season', 'sports',
new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null]
]);
var options = {
height: 400,
gantt: {
trackHeight: 30
}
};
var chart = new google.visualization.Gantt(document.getElementById('chart_div'));
chart.draw(data, options);
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

according to the configuration options, use option --> gantt.labelStyle
gantt: {
labelStyle: {
color: '#ff0000',
fontName: 'Arial',
fontSize: 20
}
}
although fontName & fontSize appear to work properly,
color does not...
notice the color doesn't change in the following working snippet...
google.charts.load('current', {
callback: drawChart,
packages: ['gantt']
});
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Task ID');
data.addColumn('string', 'Task Name');
data.addColumn('string', 'Resource');
data.addColumn('date', 'Start Date');
data.addColumn('date', 'End Date');
data.addColumn('number', 'Duration');
data.addColumn('number', 'Percent Complete');
data.addColumn('string', 'Dependencies');
data.addRows([
['2014Spring', 'Spring 2014', 'spring',
new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null],
['2014Summer', 'Summer 2014', 'summer',
new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null],
['2014Autumn', 'Autumn 2014', 'autumn',
new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null],
['2014Winter', 'Winter 2014', 'winter',
new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null],
['2015Spring', 'Spring 2015', 'spring',
new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null],
['2015Summer', 'Summer 2015', 'summer',
new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null],
['2015Autumn', 'Autumn 2015', 'autumn',
new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null],
['2015Winter', 'Winter 2015', 'winter',
new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null],
['Football', 'Football Season', 'sports',
new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null],
['Baseball', 'Baseball Season', 'sports',
new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null],
['Basketball', 'Basketball Season', 'sports',
new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null],
['Hockey', 'Hockey Season', 'sports',
new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null]
]);
var options = {
height: 400,
gantt: {
trackHeight: 30,
labelStyle: {
color: '#ff0000',
fontName: 'Arial',
fontSize: 20
}
}
};
var container = document.getElementById('chart_div');
var chart = new google.visualization.Gantt(container);
chart.draw(data, options);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>
one option would be to change the color manually using script
first, need to identify the row labels from the bottom date labels
to do so, test the label value exists in the data table column for 'Task Name'
use data table method --> getFilteredRows
the only problem with changing the color manually,
the chart will change the color back to its original,
anytime there is activity, such as hovering a row and / or row label
as such, need to use a MutationObserver, or something,
to keep the new color
see following working snippet...
google.charts.load('current', {
callback: drawChart,
packages: ['gantt']
});
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Task ID');
data.addColumn('string', 'Task Name');
data.addColumn('string', 'Resource');
data.addColumn('date', 'Start Date');
data.addColumn('date', 'End Date');
data.addColumn('number', 'Duration');
data.addColumn('number', 'Percent Complete');
data.addColumn('string', 'Dependencies');
data.addRows([
['2014Spring', 'Spring 2014', 'spring',
new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null],
['2014Summer', 'Summer 2014', 'summer',
new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null],
['2014Autumn', 'Autumn 2014', 'autumn',
new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null],
['2014Winter', 'Winter 2014', 'winter',
new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null],
['2015Spring', 'Spring 2015', 'spring',
new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null],
['2015Summer', 'Summer 2015', 'summer',
new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null],
['2015Autumn', 'Autumn 2015', 'autumn',
new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null],
['2015Winter', 'Winter 2015', 'winter',
new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null],
['Football', 'Football Season', 'sports',
new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null],
['Baseball', 'Baseball Season', 'sports',
new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null],
['Basketball', 'Basketball Season', 'sports',
new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null],
['Hockey', 'Hockey Season', 'sports',
new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null]
]);
var options = {
height: 400,
gantt: {
trackHeight: 30,
labelStyle: {
fontName: 'Arial',
fontSize: 20
}
}
};
var container = document.getElementById('chart_div');
var chart = new google.visualization.Gantt(container);
var observer = new MutationObserver(function () {
$.each($('text'), function (index, label) {
var rowIndex = data.getFilteredRows([{
column: 1,
value: $(label).text()
}]);
if (rowIndex.length > 0) {
$(label).attr('fill', '#ff0000')
}
});
});
observer.observe(container, {
childList: true,
subtree: true
});
chart.draw(data, options);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Trying to draw multiple Gantt charts draws only 1

I'm using Google Charts Gantt to draw several charts in my page, this is the code:
function drawGantt() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Task ID');
data.addColumn('string', 'Task Name');
data.addColumn('string', 'Resource');
data.addColumn('date', 'Start Date');
data.addColumn('date', 'End Date');
data.addColumn('number', 'Duration');
data.addColumn('number', 'Percent Complete');
data.addColumn('string', 'Dependencies');
data.addRows([
['2014Spring', 'Spring 2014', 'spring',
new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null],
['2014Summer', 'Summer 2014', 'summer',
new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null],
['2014Autumn', 'Autumn 2014', 'autumn',
new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null],
['2014Winter', 'Winter 2014', 'winter',
new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null],
['2015Spring', 'Spring 2015', 'spring',
new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null],
['2015Summer', 'Summer 2015', 'summer',
new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null],
['2015Autumn', 'Autumn 2015', 'autumn',
new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null],
['2015Winter', 'Winter 2015', 'winter',
new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null],
['Football', 'Football Season', 'sports',
new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null],
['Baseball', 'Baseball Season', 'sports',
new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null],
['Basketball', 'Basketball Season', 'sports',
new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null],
['Hockey', 'Hockey Season', 'sports',
new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null]
]);
var els = document.getElementsByClassName("gantt-chart");
for(i = 0; i < els.length; i++){
var el = els[i];
var options = {
width: 1100,
height: 400,
chartArea: {width: '100%', height: '100%'},
gantt: {
trackHeight: 30
}
};
var chart = new google.visualization.Gantt(el);
chart.draw(data, options);
}
}
As you can see at the end I'm using a loop over elements in the HTML and I assign a chart to each of them but the result is that all the charts except 1 are always empty, which is rendered randomises everytime.
I've read this article which relates to a similar problem with a different chart but I can't really apply that solution because I can easily have more than 15 charts rendered at the same time in the page.
What can I do to render all these charts at the same time without having conflicts with draw function?
Thanks in advance.

code seems to work fine here...
google.charts.load('current', {'packages':['gantt']});
google.charts.setOnLoadCallback(drawGantt);
function drawGantt() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Task ID');
data.addColumn('string', 'Task Name');
data.addColumn('string', 'Resource');
data.addColumn('date', 'Start Date');
data.addColumn('date', 'End Date');
data.addColumn('number', 'Duration');
data.addColumn('number', 'Percent Complete');
data.addColumn('string', 'Dependencies');
data.addRows([
['2014Spring', 'Spring 2014', 'spring',
new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null],
['2014Summer', 'Summer 2014', 'summer',
new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null],
['2014Autumn', 'Autumn 2014', 'autumn',
new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null],
['2014Winter', 'Winter 2014', 'winter',
new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null],
['2015Spring', 'Spring 2015', 'spring',
new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null],
['2015Summer', 'Summer 2015', 'summer',
new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null],
['2015Autumn', 'Autumn 2015', 'autumn',
new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null],
['2015Winter', 'Winter 2015', 'winter',
new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null],
['Football', 'Football Season', 'sports',
new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null],
['Baseball', 'Baseball Season', 'sports',
new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null],
['Basketball', 'Basketball Season', 'sports',
new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null],
['Hockey', 'Hockey Season', 'sports',
new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null]
]);
var els = document.getElementsByClassName("gantt-chart");
for(i = 0; i < els.length; i++){
var el = els[i];
var options = {
width: 1100,
height: 400,
chartArea: {width: '100%', height: '100%'},
gantt: {
trackHeight: 30
}
};
var chart = new google.visualization.Gantt(el);
chart.draw(data, options);
}
}
div {
border: 1px solid #e0e0e0;
padding: 6px;
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div class="gantt-chart"></div>
<div class="gantt-chart"></div>
<div class="gantt-chart"></div>
<div class="gantt-chart"></div>
<div class="gantt-chart"></div>
<div class="gantt-chart"></div>

i have faced the issue while creating triple y-axis

i have faced the problem while creating triple y-axis in google charts .
The problem is space between right side axis. could you please help me.
i provided the following code snippet. In result, right y-axes are merged .could you provide what is way to give space /gap between them to look good. Thank you
google.charts.load('current', {'packages':['line', 'corechart']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Month');
data.addColumn('number', "Average Temperature");
data.addColumn('number', "Average Hours of Daylight");
data.addColumn('number', "Average 1");
data.addColumn('number',"Average 2")
data.addRows([
[new Date(2014, 0), -.5, 8.7,7,11],
[new Date(2014, 1), .4, 8.7,5,12],
[new Date(2014, 2), .5, 12,6,13],
[new Date(2014, 3), 2.9, 15.7,5,14],
[new Date(2014, 4), 6.3, 18.6,8,15],
[new Date(2014, 5), 9, 20.9,8,16],
[new Date(2014, 6), 10.6, 19.8,9,16],
[new Date(2014, 7), 10.3, 16.6,7,15],
[new Date(2014, 8), 7.4, 13.3,8,14],
[new Date(2014, 9), 4.4, 9.9,12,13],
[new Date(2014, 10), 1.1, 6.6,11,12],
[new Date(2014, 11), -.2, 4.5,11,11]
]);
var classicOptions = {
title: 'Average Temperatures and Daylight in Iceland Throughout the Year',
width: 900,
height: 500,
// Gives each series an axis that matches the vAxes number below.
series: {
0: {targetAxisIndex: 0},
1: {targetAxisIndex: 1},
2: {targetAxisIndex: 2},
3: {targetAxisIndex: 3}
},
vAxes: {
// Adds titles to each axis.
0: {title: 'Temps (Celsius)'},
1: {title: 'Daylight'},
2: {title: 'third'},
3: {title: 'foruth'}
},
hAxis: {
ticks: [new Date(2014, 0), new Date(2014, 1), new Date(2014, 2), new Date(2014, 3),
new Date(2014, 4), new Date(2014, 5), new Date(2014, 6), new Date(2014, 7),
new Date(2014, 8), new Date(2014, 9), new Date(2014, 10), new Date(2014, 11)
]
},
vAxis: {
viewWindow: {
max: 30
}
}
};
var classicChart = new google.visualization.LineChart(document.getElementById('chart_div'));
classicChart.draw(data, classicOptions);
}
<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<br><br>
<div id="chart_div"></div>

i'm thinking this feature was intended for no more than two vAxes,
although it does appear to work, there aren't any config options to handle this
if you must have three, try textPosition
have one 'in' and the other 'out'
see following example...
google.charts.load('current', {
callback: function () {
var data = new google.visualization.DataTable();
data.addColumn('date', 'Month');
data.addColumn('number', "Average Temperature");
data.addColumn('number', "Average Hours of Daylight");
data.addColumn('number', "Average 1");
data.addColumn('number',"Average 2")
data.addRows([
[new Date(2014, 0), -.5, 8.7,7,11],
[new Date(2014, 1), .4, 8.7,5,12],
[new Date(2014, 2), .5, 12,6,13],
[new Date(2014, 3), 2.9, 15.7,5,14],
[new Date(2014, 4), 6.3, 18.6,8,15],
[new Date(2014, 5), 9, 20.9,8,16],
[new Date(2014, 6), 10.6, 19.8,9,16],
[new Date(2014, 7), 10.3, 16.6,7,15],
[new Date(2014, 8), 7.4, 13.3,8,14],
[new Date(2014, 9), 4.4, 9.9,12,13],
[new Date(2014, 10), 1.1, 6.6,11,12],
[new Date(2014, 11), -.2, 4.5,11,11]
]);
var classicOptions = {
title: 'Average Temperatures and Daylight in Iceland Throughout the Year',
width: 900,
height: 500,
chartArea: {
width: '50%'
},
series: {
0: {targetAxisIndex: 0},
1: {targetAxisIndex: 1},
2: {targetAxisIndex: 2}
},
vAxes: {
0: {
textPosition: 'out',
title: 'Temps (Celsius)'
},
1: {
textPosition: 'in',
title: 'Daylight',
viewWindow: {
max: 30
}
},
2: {
textPosition: 'out',
title: 'third',
viewWindow: {
max: 40
}
}
},
hAxis: {
ticks: [
new Date(2014, 0), new Date(2014, 1), new Date(2014, 2), new Date(2014, 3),
new Date(2014, 4), new Date(2014, 5), new Date(2014, 6), new Date(2014, 7),
new Date(2014, 8), new Date(2014, 9), new Date(2014, 10), new Date(2014, 11)
]
},
};
var classicChart = new google.visualization.LineChart(document.getElementById('chart_div'));
classicChart.draw(data, classicOptions);
},
packages:['corechart']
});
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="chart_div"></div>

Google Gantt Chart

I am using the Gantt Chart provided by Google.
I have added a listener to when I click on any of the elements or entity in attempt to return the row/columns data, but it is returning empty,
function selectHandler() {
var selectedItem = chart.getSelection();
if (selectedItem) {
console.log(selectedItem);
}
}
google.visualization.events.addListener(chart, 'select', selectHandler);
Here is my attempt on jsfiddle: https://jsfiddle.net/30cuaarb/

Selection does not seem to work with google.visualization.GanttChart component, but you could introduce a custom selection as demonstrated below:
google.load("visualization", "1.1", { packages: ["gantt"] });
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Task ID');
data.addColumn('string', 'Task Name');
data.addColumn('string', 'Resource');
data.addColumn('date', 'Start Date');
data.addColumn('date', 'End Date');
data.addColumn('number', 'Duration');
data.addColumn('number', 'Percent Complete');
data.addColumn('string', 'Dependencies');
data.addRows([
['2014Spring', 'Spring 2014', 'spring',
new Date(2014, 2, 22), new Date(2014, 5, 20), null, 100, null],
['2014Summer', 'Summer 2014', 'summer',
new Date(2014, 5, 21), new Date(2014, 8, 20), null, 100, null],
['2014Autumn', 'Autumn 2014', 'autumn',
new Date(2014, 8, 21), new Date(2014, 11, 20), null, 100, null],
['2014Winter', 'Winter 2014', 'winter',
new Date(2014, 11, 21), new Date(2015, 2, 21), null, 100, null],
['2015Spring', 'Spring 2015', 'spring',
new Date(2015, 2, 22), new Date(2015, 5, 20), null, 50, null],
['2015Summer', 'Summer 2015', 'summer',
new Date(2015, 5, 21), new Date(2015, 8, 20), null, 0, null],
['2015Autumn', 'Autumn 2015', 'autumn',
new Date(2015, 8, 21), new Date(2015, 11, 20), null, 0, null],
['2015Winter', 'Winter 2015', 'winter',
new Date(2015, 11, 21), new Date(2016, 2, 21), null, 0, null],
['Football', 'Football Season', 'sports',
new Date(2014, 8, 4), new Date(2015, 1, 1), null, 100, null],
['Baseball', 'Baseball Season', 'sports',
new Date(2015, 2, 31), new Date(2015, 9, 20), null, 14, null],
['Basketball', 'Basketball Season', 'sports',
new Date(2014, 9, 28), new Date(2015, 5, 20), null, 86, null],
['Hockey', 'Hockey Season', 'sports',
new Date(2014, 9, 8), new Date(2015, 5, 21), null, 89, null]
]);
var options = {
height: 400,
gantt: {
trackHeight: 30
}
};
var chart = new google.visualization.GanttChart(document.getElementById('chart_div'));
chart.draw(data, options);
google.visualization.events.addListener(chart, 'select', selectHandler);
google.visualization.events.addListener(chart, 'onmouseover', saveSelection);
var selectedItem; //custom selector
function saveSelection(e) {
selectedItem = { row:e.row,column:null}; //save selected item
}
function selectHandler() {
//console.log(selectedItem);
document.getElementById('result').innerHTML = selectedItem.row + " row has been selected";
}
}
<script type="text/javascript" src="https://www.google.com/jsapi?autoload={'modules':[{'name':'visualization','version':'1.1','packages':['gantt']}]}"></script>
<div id="chart_div"></div>
Result: <span id='result' />

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