easy_flutter_charts 1.1.0

is a simple, lightweight, and customizable library for creating charts in Flutter.

easy_flutter_charts

easy_flutter_charts is a simple, lightweight, and customizable library for creating charts in Flutter. It provides chart components ideal for dashboards, statistical visualizations, and more. You can integrate elegant and responsive data visualizations in just a few minutes.

📦 Installation

Add the latest version of easy_flutter_charts to your pubspec.yaml:

dependencies:
  easy_flutter_charts: latest version

BarChart

Example

Center(
      child: SizedBox(
        height: 400,
        width: 600,
        child: BarChart(
          title: 'Vendas por país',
          titleStyle: const TextStyle(
            fontSize: 20,
            color: Colors.black,
            fontWeight: FontWeight.w600,
          ),
          data: [
            BarChartData(label: 'Alemanha', value: 50, color: Colors.blue),
            BarChartData(label: 'Brasil', value: 80, color: Colors.red),
            BarChartData(label: 'Camarões', value: 30, color: Colors.green),
            BarChartData(label: 'Dinamarca', value: 70, color: Colors.orange),
            BarChartData(
              label: ['Estados', 'Unidos', 'da América'],
              value: 100,
              color: Colors.orange,
            ),
            BarChartData(label: 'China', value: 25.5, color: Colors.green),
          ],
        ),
      ),
    );

Property	Type	Description
data	List<BarChartData>	List of objects representing the data to be displayed in the chart.
spacing	double	Horizontal spacing between bars (default: 20).
title	String?	Title of the chart.
titleStyle	TextStyle?	Text style for the chart title.
xAxisLabelStyle	TextStyle?	Text style for the X-axis labels.
yAxisLabelStyle	TextStyle?	Text style for the Y-axis labels.
yAxisLabelFormatter	String Function(double value)?	Function to format the values displayed on the Y-axis.
xAxisLabelFormatter	String Function(dynamic label)?	Function to format the labels displayed on the X-axis.
onBarTap	void Function(BarChartData)?	Callback triggered when a specific bar is tapped.
barTooltipBuilder	String Function(BarChartData)?	Function to customize the tooltip content when a bar is tapped.
yAxisMargin	double	Left margin for displaying Y-axis labels (default: 30).
xAxisMargin	double	Bottom margin for X-axis labels (default: 30).

LineChart

Example

Center(
      child: SizedBox(
        height: 300,
        width: 600,
        child: LineChart(
          title: 'Temperatura Diária',
          titleStyle: const TextStyle(
            fontSize: 20,
            color: Colors.black,
            fontWeight: FontWeight.w600,
          ),
          series: [
            LineChartSeries(
              name: 'Máxima',
              color: Colors.red,
              data: [
                LineChartData(label: 'Segunda', value: 30),
                LineChartData(label: 'Terça', value: 32),
                LineChartData(label: 'Quarta', value: 31),
                LineChartData(label: 'Quinta', value: 33),
                LineChartData(label: 'Sexta', value: 29),
              ],
            ),
            LineChartSeries(
              name: 'Média',
              color: Colors.orange,
              data: [
                LineChartData(label: 'Segunda', value: 27),
                LineChartData(label: 'Terça', value: 25),
                LineChartData(label: 'Quarta', value: 21),
                LineChartData(label: 'Quinta', value: 29),
              ],
            ),
            LineChartSeries(
              name: 'Mínima',
              color: Colors.blue,
              data: [
                LineChartData(label: 'Segunda', value: 20),
                LineChartData(label: 'Terça', value: 21),
                LineChartData(label: 'Quarta', value: 19),
              ],
            ),
          ],
          yAxisLabelFormatter: (v) => '${v.toStringAsFixed(0)}°C',
          yAxisLabelStyle: TextStyle(fontSize: 10),
          xAxisLabelFormatter: (label) => label.toString(),
          xAxisLabelStyle: TextStyle(fontSize: 10),
          showDots: true,
          showGrid: true,
          xAxis: [
            'Segunda',
            'Terça',
            ['Quarta', 'feira'],
            ['Quinta', 'feira'],
            ['Sexta', 'feira']
          ],
          // lineTooltipBuilder: (serie, point) =>
          //     '${serie.name}: ${point.label}: ${point.value} °C',
        ),
      ),
    );

Property	Type	Description
series	List<LineChartSeries>	List of series (lines) to be drawn in the chart. Each series represents a line with its own points and color.
xAxis	List<dynamic>	Required. List of X-axis labels. Defines the number of visible points and their respective labels.
spacing	double	Horizontal spacing between line points (default: 20).
title	String?	Title of the chart.
titleStyle	TextStyle?	Style for the chart title.
xAxisLabelStyle	TextStyle?	Style for the X-axis labels.
yAxisLabelStyle	TextStyle?	Style for the Y-axis labels.
yAxisLabelFormatter	String Function(double value)?	Function to format Y-axis values.
xAxisLabelFormatter	String Function(dynamic label)?	Function to format X-axis labels.
onPointTap	void Function(LineChartData)?	Callback triggered when a point on the line is tapped.
yAxisMargin	double	Left margin for Y-axis labels (default: 30).
xAxisMargin	double	Bottom margin for X-axis labels (default: 30).
showDots	bool	Show or hide dots at the vertices of the lines (default: true).
showGrid	bool	Show or hide background grid (default: true).
lineTooltipBuilder	String Function(LineChartSeries series, LineChartData)?	Function to customize tooltip content when a point is tapped.
dotRadius	double	Radius of visible dots (if showDots is true) (default: 4.0).
strokeWidth	double	Stroke width of the line drawn on the chart (default: 2.0).
yMin	double?	Optional minimum value for the Y-axis. If not set, it will be automatically calculated based on the data.
yMax	double?	Optional maximum value for the Y-axis. If not set, it will be automatically calculated based on the data.

PieChart

Example

Center(
      child: PieChart(
        title: 'Distribuição de Vendas',
        titleStyle: const TextStyle(
          fontSize: 20,
          color: Colors.black,
          fontWeight: FontWeight.w600,
        ),
        data: [
          PieChartData(label: 'Brasil', value: 60, color: Colors.green),
          PieChartData(label: 'Alemanha', value: 76, color: Colors.blue),
          PieChartData(label: 'Japão', value: 90, color: Colors.red),
          PieChartData(label: 'EUA', value: 150, color: Colors.orange),
        ],
        aspectRatio: 3,
        pieTooltipBuilder: (data) =>
            '${data.label}: ${data.value.toStringAsFixed(1)} unidades',
      ),
    );

Property	Type	Description
data	List<PieChartData>	List containing the chart data.
title	String?	Title of the chart.
titleStyle	TextStyle?	Text style for the chart title.
aspectRatio	double	Width/height ratio of the chart. (default: 3.0).
legendPosition	LegendPosition	Legend position: top, bottom. (default: bottom).
pieTooltipBuilder	String Function(PieChartData)?	Function to customize tooltip content on hover or touch.

RadialBarChart

Example

Center(
      child: RadialBarChart(
        data: [
          RadialBarData(value: 40, color: Colors.blue, label: 'Azul'),
          RadialBarData(value: 30, color: Colors.green, label: 'Verde'),
          RadialBarData(value: 20, color: Colors.orange, label: 'Laranja'),
          RadialBarData(value: 60, color: Colors.red, label: 'Vermelho'),
        ],
        centerTextBuilder: (data) => '${data.label}\n${data.value} unidades',
        centerTextStyle: const TextStyle(
          fontSize: 12,
          fontWeight: FontWeight.w600,
        ),
        aspectRatio: 1.5,
      );

Property	Type	Description
data	List<RadialBarData>	List of objects that represent the chart values.
legendPosition	LegendPosition	Legend position: top or bottom. Defaults to bottom.
centerTextBuilder	String Function(RadialBarData)?	Optional function to customize the center text based on hovered segment.
centerTextStyle	TextStyle?	Text style for the center label.
aspectRatio	double	Aspect ratio of the chart. Defaults to 2.0.

📁 Examples

For full usage examples with real charts, check out the /example directory in this repository.
There you'll find practical demonstrations of all chart types with customizations and interactions.

📮 Contribution

Contributions are welcome!
Feel free to open an issue or submit a pull request. 😊

📝 License

Distributed under the MIT License.
See the LICENSE file for more information.

👨‍💻 Author

Developed by Rômulo Rodrigues.
Questions or suggestions? Open an issue.