Flutter – Horizontal Bar Chart stacked in one bar chart

Issue

I’m trying to achieve this type of horizontal bar chart stacked within one Bar chart. I came across the fl_chart package, but none of it seems to have the type that I’m looking for. If any champ can support me in giving me steps to how to achieve this or an exemplary code will be so much helpful. Thank you so much in advance.

Solution

Thanks for the code @ChiragBargoojar, I just added bits of customization and the graph works as how I designed it.

If anyone else wondering, here’s the code:

class HorizontalBarChart extends StatelessWidget {
  const HorizontalBarChart({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    List<Map<String, dynamic>> chartData = [
      {
        "units": 50,
        "color": cCoffee,
      },
      {
        "units": 10,
        "color": cCyan,
      },
      {
        "units": 70,
        "color": cGreen,
      },
      {
        "units": 100,
        "color": cOrange,
      },
    ];
    double maxWidth = MediaQuery.of(context).size.width - 36;
    var totalUnitNum = 0;
    for (int i = 0; i < chartData.length; i++) {
      totalUnitNum = totalUnitNum + int.parse(chartData[i]["units"].toString());
    }

    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 18.0),
      child: ClipRRect(
        borderRadius: BorderRadius.circular(90),
        child: Row(
          children: [
            for (int i = 0; i < chartData.length; i++)
              i == chartData.length - 1
                  ? Expanded(
                      child: SizedBox(
                        height: 16,
                        child: ColoredBox(
                          color: chartData[i]["color"],
                        ),
                      ),
                    )
                  : Row(
                      children: [
                        SizedBox(
                          width:
                              chartData[i]["units"] / totalUnitNum * maxWidth,
                          height: 16,
                          child: ColoredBox(
                            color: chartData[i]["color"],
                          ),
                        ),
                        const SizedBox(width: 6),
                      ],
                    )
          ],
        ),
      ),
    );
  }
}

Answered By – Gilbert Aligoey

Answer Checked By – David Marino (FlutterFixes Volunteer)