Gantt Chart with Dates
Gannt chart is a variation on Bar chart commonly used to visualize project schedule. Each bar represents a task in the schedule with its start and end locations corresponding to the date/time of the item’s beginning and end.
Key implementation details
The only change needed to convert a regular bar chart with date-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",
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",
paddingLeft: 0,
layout: root.verticalLayout
}));
// 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: "Module #1",
start: new Date(2016, 0, 1).getTime(),
end: new Date(2016, 0, 14).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(0), 0)
},
task: "Gathering requirements"
}, {
category: "Module #1",
start: new Date(2016, 0, 16).getTime(),
end: new Date(2016, 0, 27).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(0), 0.4)
},
task: "Producing specifications"
}, {
category: "Module #1",
start: new Date(2016, 1, 5).getTime(),
end: new Date(2016, 3, 18).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(0), 0.8)
},
task: "Development"
}, {
category: "Module #1",
start: new Date(2016, 3, 18).getTime(),
end: new Date(2016, 5, 1).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(0), 1.2)
},
task: "Testing and QA"
}, {
category: "Module #2",
start: new Date(2016, 0, 8).getTime(),
end: new Date(2016, 0, 10).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(2), 0)
},
task: "Gathering requirements"
}, {
category: "Module #2",
start: new Date(2016, 0, 12).getTime(),
end: new Date(2016, 0, 15).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(2), 0.4)
},
task: "Producing specifications"
}, {
category: "Module #2",
start: new Date(2016, 0, 16).getTime(),
end: new Date(2016, 1, 5).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(2), 0.8)
},
task: "Development"
}, {
category: "Module #2",
start: new Date(2016, 1, 10).getTime(),
end: new Date(2016, 1, 18).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(2), 1.2)
},
task: "Testing and QA"
}, {
category: "Module #3",
start: new Date(2016, 0, 2).getTime(),
end: new Date(2016, 0, 8).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(4), 0)
},
task: "Gathering requirements"
}, {
category: "Module #3",
start: new Date(2016, 0, 8).getTime(),
end: new Date(2016, 0, 16).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(4), 0.4)
},
task: "Producing specifications"
}, {
category: "Module #3",
start: new Date(2016, 0, 19).getTime(),
end: new Date(2016, 2, 1).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(4), 0.8)
},
task: "Development"
}, {
category: "Module #3",
start: new Date(2016, 2, 12).getTime(),
end: new Date(2016, 3, 5).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(4), 1.2)
},
task: "Testing and QA"
}, {
category: "Module #4",
start: new Date(2016, 0, 1).getTime(),
end: new Date(2016, 0, 19).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(6), 0)
},
task: "Gathering requirements"
}, {
category: "Module #4",
start: new Date(2016, 0, 19).getTime(),
end: new Date(2016, 1, 3).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(6), 0.4)
},
task: "Producing specifications"
}, {
category: "Module #4",
start: new Date(2016, 2, 20).getTime(),
end: new Date(2016, 3, 25).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(6), 0.8)
},
task: "Development"
}, {
category: "Module #4",
start: new Date(2016, 3, 27).getTime(),
end: new Date(2016, 4, 15).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(6), 1.2)
},
task: "Testing and QA"
}, {
category: "Module #5",
start: new Date(2016, 0, 1).getTime(),
end: new Date(2016, 0, 12).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(8), 0)
},
task: "Gathering requirements"
}, {
category: "Module #5",
start: new Date(2016, 0, 12).getTime(),
end: new Date(2016, 0, 19).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(8), 0.4)
},
task: "Producing specifications"
}, {
category: "Module #5",
start: new Date(2016, 0, 19).getTime(),
end: new Date(2016, 2, 1).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(8), 0.8)
},
task: "Development"
}, {
category: "Module #5",
start: new Date(2016, 2, 8).getTime(),
end: new Date(2016, 2, 30).getTime(),
columnSettings: {
fill: am5.Color.brighten(colors.getIndex(8), 1.2)
},
task: "Testing and QA"
}];
// Create axes
// https://www.amcharts.com/docs/v5/charts/xy-chart/axes/
var yRenderer = am5xy.AxisRendererY.new(root, {
minorGridEnabled: true
});
yRenderer.grid.template.set("location", 1);
var yAxis = chart.yAxes.push(
am5xy.CategoryAxis.new(root, {
categoryField: "category",
renderer: yRenderer,
tooltip: am5.Tooltip.new(root, {})
})
);
yAxis.data.setAll([
{ category: "Module #1" },
{ category: "Module #2" },
{ category: "Module #3" },
{ category: "Module #4" },
{ category: "Module #5" }
]);
var xAxis = chart.xAxes.push(
am5xy.DateAxis.new(root, {
baseInterval: { timeUnit: "minute", count: 1 },
renderer: am5xy.AxisRendererX.new(root, {
strokeOpacity: 0.1,
minorGridEnabled: true,
minGridDistance: 80
})
})
);
// 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: "start",
valueXField: "end",
categoryYField: "category",
sequencedInterpolation: true
}));
series.columns.template.setAll({
templateField: "columnSettings",
strokeOpacity: 0,
tooltipText: "{task}:\n[bold]{openValueX}[/] - [bold]{valueX}[/]"
});
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>