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| LineChartBarData _createLineChatBarData(List<FlSpot> spots, List<int> xAxisIndex) { return LineChartBarData( showingIndicators: xAxisIndex, barWidth: 2, spots: spots, colors: [lineChartColor], isCurved: true, curveSmoothness: 0, isStepLineChart: false, dotData: FlDotData( show: true, dotSize: 3, strokeWidth: 0, showText: true, getTextStyle: (FlSpot spot) { return TextStyle(color: Colors.green); }, getStrokeColor: (FlSpot spot, double xPercentage, LineChartBarData bar) { return Colors.red; }, getDotColor: (FlSpot _, double xPercentage, LineChartBarData bar) { return Colors.red; } ), ); }
LineChart _chartChild() { List<int> spotsNum = []; widget.spotsArray.forEach((item) { item.forEach((spot) { spotsNum.add(spot.y.toInt()); }); });
spotsNum.addAll(widget.extraLines); int yAxisMax = ArrayUtil.getArrMaxNum(spotsNum); int yAxisMin = ArrayUtil.getArrMinNum(spotsNum); List<int> xAxisIndex = widget.xAxis.asMap().keys.toList(); List<LineChartBarData> lineBarsData = widget.spotsArray.asMap().keys.map((index) { return _createLineChatBarData(widget.spotsArray[index], xAxisIndex); }).toList();
return LineChart(LineChartData( maxY: yAxisMax.toDouble(), minY: yAxisMin.toDouble(), titlesData: FlTitlesData( leftTitles: SideTitles( margin: 15.w, showTitles: true, reservedSize: 15, textStyle: chartTitleStyle,
getTitles: (val) { return null; } ), bottomTitles: SideTitles( margin: 20.h, showTitles: true, textStyle: chartTitleStyle, getTitles: (val) { int index = xAxisIndex.length - 1 - int.parse((val - 1).toStringAsFixed(0)); var dateString = widget.xAxis[index]; return dateString; }, ), ), lineBarsData: lineBarsData, borderData: FlBorderData( show: false, ), extraLinesData: ExtraLinesData( extraLinesOnTop: true, horizontalLines: widget.extraLines.map((line) { return _createExternalHLine(line.toDouble()); }).toList(), verticalLines: [], ), gridData: FlGridData( show: false, drawHorizontalLine: false, drawVerticalLine: false, verticalInterval: 3 ),
}
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