how can i scroll my gnatt highcharts using mouse wheel - highcharts

Question

https://jsfiddle.net/cavrzkwg/1/
here is the link for the gnatt highcharts i want to make it scrollable using mousewheel not the main scrollbar but the inbuilt scrollbar of highcharts
i tried the setextremes ec=vents but no luck
here is the link for the gnatt highcharts i want to make it scrollable using mousewheel not the main scrollbar but the inbuilt scrollbar of highcharts
i tried the setextremes ec=vents but no luck
Highcharts.ganttChart('container', {
title: {
text: 'Gantt Chart with Progress Indicators'
},
scrollbar: {
enabled: true
},
yAxis: {
min: 0,
max: 3,
scrollbar:{
enabled : true,
showFull: false
}
},
xAxis: {
min: Date.UTC(2014, 10, 17),
max: Date.UTC(2014, 10, 30),
grid: {
enabled: true,
borderColor: 'rgba(0,0,0,0.3)',
borderWidth: 1
}
},
legend: {
enabled: true
},
series: [{
name: 'Project 1',
data: [{
name: 'Start prototype',
start: Date.UTC(2014, 10, 18),
end: Date.UTC(2014, 10, 25),
completed: 0.25
},{
name: 'Start',
start: Date.UTC(2014, 9, 18),
end: Date.UTC(2014, 10, 25),
completed: 0.25
}, {
name: 'Test prototype',
start: Date.UTC(2014, 10, 27),
end: Date.UTC(2014, 10, 29)
}, {
name: 'Develop',
start: Date.UTC(2014, 10, 20),
end: Date.UTC(2014, 10, 25),
completed: {
amount: 0.12,
fill: '#fa0'
}
}, {
name: 'Run acceptance tests',
start: Date.UTC(2014, 10, 23),
end: Date.UTC(2014, 10, 26)
}]
},
{
name: 'Project 2',
data: [{
name: 'Start prototype2',
start: Date.UTC(2014, 10, 18),
end: Date.UTC(2014, 10, 25),
completed: 0.25
}, {
name: 'Test prototype2',
start: Date.UTC(2014, 10, 27),
end: Date.UTC(2014, 10, 29)
}]
}]
});

Answer 1

Try this custom functionality, which should allow scrolling the chart using the mouse wheel.
(function(H) {
//internal functions
function stopEvent(e) {
if (e) {
if (e.preventDefault) {
e.preventDefault();
}
if (e.stopPropagation) {
e.stopPropagation();
}
e.cancelBubble = true;
}
}
//the wrap
H.wrap(H.Chart.prototype, 'render', function(proceed) {
var chart = this,
mapNavigation = chart.options.mapNavigation;
proceed.call(chart);
// Add the mousewheel event
H.addEvent(chart.container, document.onmousewheel === undefined ? 'DOMMouseScroll' : 'mousewheel', function(event) {
var delta, extr, step, newMin, newMax, axis = chart.yAxis[0];
e = chart.pointer.normalize(event);
// Firefox uses e.detail, WebKit and IE uses wheelDelta
delta = e.detail || -(e.wheelDelta / 120);
delta = delta < 0 ? 1 : -1;
if (chart.isInsidePlot(e.chartX - chart.plotLeft, e.chartY - chart.plotTop)) {
extr = axis.getExtremes();
step = (extr.max - extr.min) / 20 * delta;
newMin = extr.min + step;
newMax = extr.max + step;
console.log('max', extr.max)
console.log('min', extr.min)
if (newMin > axis.dataMin && newMax < axis.dataMax) {
axis.setExtremes(newMin, newMax, true, false);
}
}
stopEvent(event); // Issue #5011, returning false from non-jQuery event does not prevent default
return false;
});
});
}(Highcharts));
Demo: https://jsfiddle.net/BlackLabel/9jL68mk4/