build method

@override Widget build(BuildContext context)

Describes the part of the user interface represented by this widget.

The framework calls this method in a number of different situations. For example:

• After calling initState.
• After calling didUpdateWidget.
• After receiving a call to setState.
• After a dependency of this State object changes.

Here it is called whenever the user interaction is performed and it removes the old widget and updates a chart with a new widget in SfCartesianChart.

Implementation

@override
Widget build(BuildContext context) {
  _oldDeviceOrientation = _oldDeviceOrientation == null
      ? MediaQuery.of(context).orientation
      : _deviceOrientation;
  _deviceOrientation = MediaQuery.of(context).orientation;
  _initialRender = _initialRender == null;
  _requireInvertedAxis = false;
  _triggerLoaded = false;
  _isSeriesLoaded = _isSeriesLoaded ?? true;
  _findVisibleSeries(context);
  _isSeriesLoaded = false;
  return RepaintBoundary(
      child: _ChartContainer(
          child: Container(
    decoration: BoxDecoration(
        color: widget.backgroundColor ?? _chartTheme.backgroundColor,
        border:
            Border.all(color: widget.borderColor, width: widget.borderWidth)),
    child: Container(
        margin: EdgeInsets.fromLTRB(widget.margin.left, widget.margin.top,
            widget.margin.right, widget.margin.bottom),
        child: Column(
          children: <Widget>[_renderTitle(), _renderChartElements(context)],
        )),
  )));
}