flutter_mini_chart

Lightweight, animated, interactive charts for Flutter. Zero external dependencies.

Charts

• MiniBarChart - Vertical bar chart with axis, grid lines, data labels
• MiniPieChart - Pie chart and doughnut chart (via innerRadius)

Features

• CustomPainter-based rendering
• Entry animation (bars grow, pie sweeps)
• Hover highlight and tap callbacks
• Tooltip overlay (customizable via builder)
• Legend with toggle support
• 3-level theming: per-widget style > MiniChartTheme > Theme.of(context)

Usage

import 'package:flutter_mini_chart/flutter_mini_chart.dart';

// Bar chart
MiniBarChart(
  data: [
    BarData(label: 'Jan', value: 30),
    BarData(label: 'Feb', value: 50),
    BarData(label: 'Mar', value: 20),
  ],
  style: BarChartStyle(showDataLabels: true),
  legend: ChartLegend(position: LegendPosition.bottom),
  onBarTap: (index, data) => print('${data.label}: ${data.value}'),
)

// Pie chart
MiniPieChart(
  data: [
    PieData(label: 'A', value: 35),
    PieData(label: 'B', value: 25),
    PieData(label: 'C', value: 40),
  ],
  legend: ChartLegend(position: LegendPosition.bottom),
  onSliceTap: (index, data) => print('${data.label}: ${data.value}'),
)

// Doughnut chart
MiniPieChart(
  data: [
    PieData(label: 'Online', value: 75),
    PieData(label: 'Offline', value: 25),
  ],
  style: PieChartStyle(innerRadius: 60),
)

Theming

Three levels of theme resolution (highest priority first):

1. Per-widget style: parameter
2. MiniChartTheme InheritedWidget wrapping a subtree
3. Theme.of(context) automatic fallback

// Scope a palette to a subtree
MiniChartTheme(
  data: MiniChartThemeData(
    palette: [Colors.blue, Colors.green, Colors.orange],
    animationDuration: Duration(milliseconds: 800),
  ),
  child: MiniBarChart(data: myData),
)

Installation

dependencies:
  flutter_mini_chart: ^1.0.0

License

MIT