100% Stacked bar Chart in Flutter Cartesian Charts (SfCartesianChart)
21 May 2021 / 10 minutes to read
To render a 100% stacked bar chart, create an instance of StackedBar100Series
, and add it to the series
collection property of SfCartesianChart
. The following properties can be used to customize the appearance:
-
color
- changes the color of the series. -
opacity
- controls the transparency of the chart series. -
borderWidth
- changes the stroke width of the series. -
borderColor
- changes the stroke color of the series. -
borderRadius
- used to add the rounded corners to the rectangle.
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Container(
child: SfCartesianChart(
primaryXAxis: CategoryAxis(),
series: <ChartSeries>[
StackedBar100Series<SalesData, String>(
dataSource: chartData,
xValueMapper: (SalesData sales, _) => sales.year,
yValueMapper: (SalesData sales, _) => sales.sales
),
StackedBar100Series<SalesData, String>(
dataSource: chartData,
xValueMapper: (SalesData sales, _) => sales.year,
yValueMapper: (SalesData sales, _) => sales.sales2
),
StackedBar100Series<SalesData, String>(
dataSource: chartData,
xValueMapper: (SalesData sales, _) => sales.year,
yValueMapper: (SalesData sales, _) => sales.sales3
),
StackedBar100Series<SalesData, String>(
dataSource: chartData,
xValueMapper: (SalesData sales, _) => sales.year,
yValueMapper: (SalesData sales, _) => sales.sales4
)
]
)
)
)
);
}
Bar width and spacing
The spacing
property is used to change the spacing between two segments. The default value of spacing is 0, and the value ranges from 0 to 1. Here, 1 and 0 correspond to 100% and 0% of the available space, respectively.
The width
property is used to change the width of the rectangle. The default value of the width is 0.7, and the value ranges from 0 to 1. Here, 1 and 0 correspond to 100% and 0% of the available width, respectively.
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Container(
child: SfCartesianChart(
primaryXAxis: CategoryAxis(),
series: <ChartSeries>[
StackedBar100Series<SalesData, String>(
dataSource: chartData,
xValueMapper: (SalesData sales, _) => sales.year,
yValueMapper: (SalesData sales, _) => sales.sales,
width: 0.8,
spacing: 0.2
),
StackedBar100Series<SalesData, String>(
dataSource: chartData,
xValueMapper: (SalesData sales, _) => sales.year,
yValueMapper: (SalesData sales, _) => sales.sales2,
width: 0.8,
spacing: 0.2
)
]
)
)
)
);
}
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