jo_tb_fl_chart

Description:

jo tb fl chart

jo_tb_fl_chart #
A custom wrapper around a FL line chart to allow time based swiping and interval size changes.
Features #
A simple lightweight widget that wraps an FL line chart and provides additional functionalities
like swipe left and right, and changing the visible time interval for a diagram.
Getting Started #
To use the widget's full functionality, you will have to leverage the chart controller (JOChartControllerRx) and the widget itself (JOTimeBasedSwipingLineChart).
Leverage the widget as shown below:
@override
Widget build(BuildContext context) {
final data = _generateTestData(10000, 3);
final datapoints = data.map((d) => JODataPoint(d.time, d.value1.toDouble())).toList();
final chartController = JOChartControllerRx(datapoints: datapoints, upperBound: 3500.0);
final diagram = JOTimeBasedSwipingLineChart(
controller: chartController, // get time and relevant value from ALL your data
swapAnimationDuration: const Duration(milliseconds: 250),
lineColors: [Colors.purple],
belowChartColors: [Colors.purple[200].withOpacity(0.3)],
backgroundColor: Colors.white,
axisColor: Colors.black,
xAxisTextStyle: TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 9.0),
yAxisTextStyle: TextStyle(color: Colors.white, fontWeight: FontWeight.bold, fontSize: 12.0),
yAxisLabelStepSize: 500.0,
showLegend: true, // should display a legend (interval from / to within the diagram
legendTextStyle: TextStyle(color: Colors.black, fontSize: 10, fontWeight: FontWeight.bold),
);

return SafeArea(
child: Column(
children: [
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
FlatButton(
onPressed: () => chartController.size = 60 * 60 * 1000,
child: Text('1 hour'),
color: Colors.purple[200],
),
SizedBox(width: 20.0),
FlatButton(
onPressed: () => chartController.size = 24 * 60 * 60 * 1000,
child: Text('1 day'),
color: Colors.purple[200],
),
SizedBox(width: 20.0),
FlatButton(
onPressed: () => chartController.size = 7 * 24 * 60 * 60 * 1000,
child: Text('1 week'),
color: Colors.purple[200],
),
],
),
SizedBox(height: 50.0),
diagram,
],
),
);
}
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