import 'package:fl_chart/fl_chart.dart';
import 'package:flutter/material.dart';

class ScatterChartSample2 extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => _ScatterChartSample2State();
}

class _ScatterChartSample2State extends State {
  int touchedIndex;

  Color greyColor = Colors.grey;

  List<int> selectedSpots = [];

  @override
  Widget build(BuildContext context) {
    return AspectRatio(
      aspectRatio: 1,
      child: Card(
        color: const Color(0xff222222),
        child: ScatterChart(
          ScatterChartData(
            scatterSpots: [
              ScatterSpot(
                4,
                4,
                color: selectedSpots.contains(0) ? Colors.green : greyColor,
              ),
              ScatterSpot(
                2,
                5,
                color: selectedSpots.contains(1) ? Colors.yellow : greyColor,
                radius: 12,
              ),
              ScatterSpot(
                4,
                5,
                color: selectedSpots.contains(2) ? Colors.purpleAccent : greyColor,
                radius: 8,
              ),
              ScatterSpot(
                8,
                6,
                color: selectedSpots.contains(3) ? Colors.orange : greyColor,
                radius: 20,
              ),
              ScatterSpot(
                5,
                7,
                color: selectedSpots.contains(4) ? Colors.brown : greyColor,
                radius: 14,
              ),
              ScatterSpot(
                7,
                2,
                color: selectedSpots.contains(5) ? Colors.lightGreenAccent : greyColor,
                radius: 18,
              ),
              ScatterSpot(
                3,
                2,
                color: selectedSpots.contains(6) ? Colors.red : greyColor,
                radius: 36,
              ),
              ScatterSpot(
                2,
                8,
                color: selectedSpots.contains(7) ? Colors.tealAccent : greyColor,
                radius: 22,
              ),
            ],
            minX: 0,
            maxX: 10,
            minY: 0,
            maxY: 10,
            borderData: FlBorderData(
              show: false,
            ),
            gridData: FlGridData(
              show: true,
              drawHorizontalLine: true,
              checkToShowHorizontalLine: (value) => true,
              getDrawingHorizontalLine: (value) => FlLine(color: Colors.white.withOpacity(0.1)),
              drawVerticalLine: true,
              checkToShowVerticalLine: (value) => true,
              getDrawingVerticalLine: (value) => FlLine(color: Colors.white.withOpacity(0.1)),
            ),
            titlesData: FlTitlesData(
              show: false,
            ),
            showingTooltipIndicators: selectedSpots,
            scatterTouchData: ScatterTouchData(
              enabled: true,
              handleBuiltInTouches: false,
              touchTooltipData: ScatterTouchTooltipData(
                tooltipBgColor: Colors.black,
                getTooltipItems: (ScatterSpot touchedBarSpot) {
                  return ScatterTooltipItem(
                    'X: ',
                    TextStyle(
                      height: 1.2,
                      color: Colors.grey[100],
                      fontStyle: FontStyle.italic,
                    ),
                    10,
                    children: [
                      TextSpan(
                        text: '${touchedBarSpot.x.toInt()} \n',
                        style: TextStyle(
                          color: Colors.white,
                          fontStyle: FontStyle.normal,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      TextSpan(
                        text: 'Y: ',
                        style: TextStyle(
                          height: 1.2,
                          color: Colors.grey[100],
                          fontStyle: FontStyle.italic,
                        ),
                      ),
                      TextSpan(
                        text: touchedBarSpot.y.toInt().toString(),
                        style: TextStyle(
                          color: Colors.white,
                          fontStyle: FontStyle.normal,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ],
                  );
                },
              ),
              touchCallback: (ScatterTouchResponse touchResponse) {
                if (touchResponse.clickHappened && touchResponse.touchedSpot != null) {
                  final sectionIndex = touchResponse.touchedSpot.spotIndex;
                  // Tap happened
                  setState(() {
                    if (selectedSpots.contains(sectionIndex)) {
                      selectedSpots.remove(sectionIndex);
                    } else {
                      selectedSpots.add(sectionIndex);
                    }
                  });
                }
              },
            ),
          ),
        ),
      ),
    );
  }
}
