Can I disable/enable Scrolling in Google Chart with a Button?


Can I disable/enable Scrolling in Google Chart with a Button?



I have a Google line chart on my site, which show the school grades of a student over the course of his school years. I have mouse wheel zooming enabled.


explorer: {
axis: 'horizontal',
maxZoomIn: 0.25,
maxZoomOut: 4
},



Now I would like to give the user the possibility to disable scrolling with a button. Is it possible to remove the 'explorer' part or just disable scrolling through a variable?




1 Answer
1



sure, let's start by moving the explorer option to a separate variable...


var options = {
pointSize: 4
};

var explorer = {
axis: 'horizontal',
maxZoomIn: 0.25,
maxZoomOut: 4
};



then we can enable explorer like so...


options.explorer = explorer;



to disable...


options.explorer = null;



keep in mind, anytime an option is changed, the chart needs to be re-drawn...



see following working snippet...




google.charts.load('current', {
packages: ['corechart']
}).then(function () {
var data = google.visualization.arrayToDataTable([
['x', 'y'],
[0, 0],
[1, 1],
[2, 2],
[3, 3],
[4, 4]
]);

var options = {
pointSize: 4
};

var explorer = {
axis: 'horizontal',
maxZoomIn: 0.25,
maxZoomOut: 4
};

$('#explorer-option').on('click', function () {
if ($('#explorer-label').html() === 'Enable') {
options.explorer = explorer;
drawChart();

$('#explorer-label').html('Disable');
$('#explorer-icon').removeClass('ui-icon-circle-check');
$('#explorer-icon').addClass('ui-icon-circle-close');
} else {
options.explorer = null;
drawChart();

$('#explorer-label').html('Enable');
$('#explorer-icon').removeClass('ui-icon-circle-close');
$('#explorer-icon').addClass('ui-icon-circle-check');
}
});

var container = document.getElementById('chart_div');

drawChart();
function drawChart() {
var chart = new google.visualization.LineChart(container);
chart.draw(data, options);
}
});


https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js
https://www.gstatic.com/charts/loader.js
<link rel="stylesheet" href="https://code.jquery.com/ui/1.12.0/themes/base/jquery-ui.css"/>
<button class="ui-button ui-widget ui-corner-all" id="explorer-option">
<span id="explorer-icon" class="ui-icon ui-icon-circle-check"></span>&nbsp;<span id="explorer-label">Enable</span>
</button>





Thank you that helped alot. the only problem is, that it only works once :/
– David Stalder
Jun 29 at 8:08





thanks, i forgot there is a bug with using explorer, the chart must be rebuilt to re-enable explorer, see comments here -- changed answer above, working now multiple times...
– WhiteHat
Jun 29 at 11:17







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