Gantt Chart
Gantt charts are typically used to display schedules or other time-based activities. In a nutshell, Gantt chart is a variation of a bar chart with time-based horizontal axis and bars starting at arbitrary values rather than on the axis.
Key implementation details
The only change needed to convert a regular bar chart with time-based values to a Gantt chart is changing its start values so bars don’t sart on the category axis, but rather on a specific value. We achieve this by setting openValueXField
on the ColumnSeries
.
Related tutorials
Demo source
<!-- Styles -->
<style>
#chartdiv {
width: 100%;
height: 500px;
}
</style>
<!-- Resources -->
<script src="https://cdn.amcharts.com/lib/5/index.js"></script>
<script src="https://cdn.amcharts.com/lib/5/xy.js"></script>
<script src="https://cdn.amcharts.com/lib/5/themes/Animated.js"></script>
<!-- Chart code -->
<script>
am5.ready(function() {
// Create root element
// https://www.amcharts.com/docs/v5/getting-started/#Root_element
var root = am5.Root.new("chartdiv");
root.dateFormatter.setAll({
dateFormat: "yyyy-MM-dd HH:mm",
dateFields: ["valueX", "openValueX"]
});
// Set themes
// https://www.amcharts.com/docs/v5/concepts/themes/
root.setThemes([
am5themes_Animated.new(root)
]);
// Create chart
// https://www.amcharts.com/docs/v5/charts/xy-chart/
var chart = root.container.children.push(am5xy.XYChart.new(root, {
panX: false,
panY: false,
wheelX: "panX",
wheelY: "zoomX",
layout: root.verticalLayout,
paddingLeft: 0
}));
// Add legend
// https://www.amcharts.com/docs/v5/charts/xy-chart/legend-xy-series/
var legend = chart.children.push(am5.Legend.new(root, {
centerX: am5.p50,
x: am5.p50
}))
var colors = chart.get("colors");
// Data
var data = [
{
category: "John",
fromDate: "2018-01-01 08:00",
toDate: "2018-01-01 10:00",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(0), 0)
}
},
{
category: "John",
fromDate: "2018-01-01 12:00",
toDate: "2018-01-01 15:00",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(0), 0.4)
}
},
{
category: "John",
fromDate: "2018-01-01 15:30",
toDate: "2018-01-01 21:30",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(0), 0.8)
}
},
{
category: "Jane",
fromDate: "2018-01-01 09:00",
toDate: "2018-01-01 12:00",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(2), 0)
}
},
{
category: "Jane",
fromDate: "2018-01-01 13:00",
toDate: "2018-01-01 17:00",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(2), 0.4)
}
},
{
category: "Peter",
fromDate: "2018-01-01 11:00",
toDate: "2018-01-01 16:00",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(4), 0)
}
},
{
category: "Peter",
fromDate: "2018-01-01 16:00",
toDate: "2018-01-01 19:00",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(4), 0.4)
}
},
{
category: "Melania",
fromDate: "2018-01-01 16:00",
toDate: "2018-01-01 20:00",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(6), 0)
}
},
{
category: "Melania",
fromDate: "2018-01-01 20:30",
toDate: "2018-01-02 00:00",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(6), 0.4)
}
},
{
category: "Donald",
fromDate: "2018-01-01 13:00",
toDate: "2018-01-02 00:00",
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(8), 0)
}
}
];
// Create axes
// https://www.amcharts.com/docs/v5/charts/xy-chart/axes/
var yAxis = chart.yAxes.push(
am5xy.CategoryAxis.new(root, {
categoryField: "category",
renderer: am5xy.AxisRendererY.new(root, {
inversed: true,
minorGridEnabled: true
}),
tooltip: am5.Tooltip.new(root, {
themeTags: ["axis"],
animationDuration: 200
})
})
);
yAxis.data.setAll([
{ category: "John" },
{ category: "Jane" },
{ category: "Peter" },
{ category: "Melania" },
{ category: "Donald" }
]);
var xAxis = chart.xAxes.push(
am5xy.DateAxis.new(root, {
baseInterval: { timeUnit: "minute", count: 1 },
renderer: am5xy.AxisRendererX.new(root, {
minorGridEnabled: true,
minGridDistance: 90
})
})
);
// Add series
// https://www.amcharts.com/docs/v5/charts/xy-chart/series/
var series = chart.series.push(am5xy.ColumnSeries.new(root, {
xAxis: xAxis,
yAxis: yAxis,
openValueXField: "fromDate",
valueXField: "toDate",
categoryYField: "category",
sequencedInterpolation: true
}));
series.columns.template.setAll({
templateField: "columnSettings",
strokeOpacity: 0,
tooltipText: "{category}: {openValueX} - {valueX}"
});
series.data.processor = am5.DataProcessor.new(root, {
dateFields: ["fromDate", "toDate"],
dateFormat: "yyyy-MM-dd HH:mm"
});
series.data.setAll(data);
// Add scrollbars
chart.set("scrollbarX", am5.Scrollbar.new(root, {
orientation: "horizontal"
}));
// Make stuff animate on load
// https://www.amcharts.com/docs/v5/concepts/animations/
series.appear();
chart.appear(1000, 100);
}); // end am5.ready()
</script>
<!-- HTML -->
<div id="chartdiv"></div>