applyRangePadding method

@override void applyRangePadding(_VisibleRange range, num? interval)

Applies range padding to auto, normal, additional, round, and none types.

Implementation

@override
void applyRangePadding(_VisibleRange range, num? interval) {
  ActualRangeChangedArgs rangeChangedArgs;
  if (_dateTimeCategoryAxis.labelPlacement == LabelPlacement.betweenTicks) {
    range.minimum -= 0.5;
    range.maximum += 0.5;
    range.delta = range.maximum - range.minimum;
  }

  if (_dateTimeCategoryAxis.isVisible &&
      !(_dateTimeCategoryAxis.minimum != null &&
          _dateTimeCategoryAxis.maximum != null)) {
    ///Calculating range padding
    _applyRangePadding(this, _chartState, range, interval!);
  }

  calculateVisibleRange(Size(_rect.width, _rect.height));

  /// Setting range as visible zoomRange
  if ((_dateTimeCategoryAxis.visibleMinimum != null ||
          _dateTimeCategoryAxis.visibleMaximum != null) &&
      (_dateTimeCategoryAxis.visibleMinimum !=
          _dateTimeCategoryAxis.visibleMaximum) &&
      _chartState._zoomedAxisRendererStates.isEmpty) {
    _visibleRange!.minimum = _visibleMinimum != null
        ? _getEffectiveRange(
            DateTime.fromMillisecondsSinceEpoch(_visibleMinimum!.toInt()),
            true)
        : _getEffectiveRange(_dateTimeCategoryAxis.visibleMinimum, true) ??
            _visibleRange!.minimum;
    _visibleRange!.maximum = _visibleMaximum != null
        ? _getEffectiveRange(
            DateTime.fromMillisecondsSinceEpoch(_visibleMaximum!.toInt()),
            false)
        : _getEffectiveRange(_dateTimeCategoryAxis.visibleMaximum, false) ??
            _visibleRange!.maximum;
    if (_dateTimeCategoryAxis.labelPlacement == LabelPlacement.betweenTicks) {
      _visibleRange!.minimum = _visibleMinimum != null
          ? _getEffectiveRange(
                  DateTime.fromMillisecondsSinceEpoch(
                      _visibleMinimum!.toInt()),
                  true)! -
              0.5
          : (_dateTimeCategoryAxis.visibleMinimum != null
              ? _getEffectiveRange(
                      _dateTimeCategoryAxis.visibleMinimum, true)! -
                  0.5
              : _visibleRange!.minimum);
      _visibleRange!.maximum = _visibleMaximum != null
          ? _getEffectiveRange(
                  DateTime.fromMillisecondsSinceEpoch(
                      _visibleMaximum!.toInt()),
                  false)! +
              0.5
          : (_dateTimeCategoryAxis.visibleMaximum != null
              ? _getEffectiveRange(
                      _dateTimeCategoryAxis.visibleMaximum, false)! +
                  0.5
              : _visibleRange!.maximum);
    }
    _visibleRange!.delta = _visibleRange!.maximum - _visibleRange!.minimum;
    _visibleRange!.interval = interval == null
        ? calculateInterval(_visibleRange!, _axisSize)
        : _visibleRange!.interval;
    _zoomFactor = _visibleRange!.delta / (range.delta);
    _zoomPosition =
        (_visibleRange!.minimum - _actualRange!.minimum) / range.delta;
  }
  if (_chart.onActualRangeChanged != null) {
    rangeChangedArgs = ActualRangeChangedArgs(_name!, _dateTimeCategoryAxis,
        range.minimum, range.maximum, range.interval, _orientation!);
    rangeChangedArgs.visibleMin = _visibleRange!.minimum;
    rangeChangedArgs.visibleMax = _visibleRange!.maximum;
    rangeChangedArgs.visibleInterval = _visibleRange!.interval;
    _chart.onActualRangeChanged!(rangeChangedArgs);
    _visibleRange!.minimum = rangeChangedArgs.visibleMin is DateTime
        ? _getEffectiveRange(rangeChangedArgs.visibleMin, true)
        : rangeChangedArgs.visibleMin;
    _visibleRange!.maximum = rangeChangedArgs.visibleMax is DateTime
        ? _getEffectiveRange(rangeChangedArgs.visibleMax, false)
        : rangeChangedArgs.visibleMax;
    _visibleRange!.delta = _visibleRange!.maximum - _visibleRange!.minimum;
    _visibleRange!.interval = rangeChangedArgs.visibleInterval;
    _zoomFactor = _visibleRange!.delta / (range.delta);
    _zoomPosition =
        (_visibleRange!.minimum - _actualRange!.minimum) / range.delta;
  }
}