zoomByFactor method

void zoomByFactor(double zoomFactor)

Changes the zoom level using zoom factor.

Here, you can pass the zoom factor of an axis to magnify the plot area. The value ranges from 0 to 1.

Implementation

void zoomByFactor(double zoomFactor) {
  final RenderBehaviorArea? parent = parentBox as RenderBehaviorArea?;
  if (parent == null) {
    return;
  }

  parent.hideInteractiveTooltip();
  final RenderCartesianAxes? cartesianAxes = parent.cartesianAxes;
  if (cartesianAxes == null) {
    return;
  }
  _isZoomIn = false;
  _isZoomOut = true;
  // TODO(YuvarajG): Need to have variable to notify zooming inprogress
  // _stateProperties.zoomProgress = true;
  RenderChartAxis? child = cartesianAxes.firstChild;
  if (zoomFactor.clamp(0.0, 1.0) == zoomFactor) {
    while (child != null) {
      if ((child.isVertical && zoomMode != ZoomMode.x) ||
          (!child.isVertical && zoomMode != ZoomMode.y)) {
        child.controller.zoomFactor = zoomFactor;
        if (parent.onZooming != null) {
          _bindZoomEvent(child, parent.onZooming!);
        }
      }
      final CartesianAxesParentData childParentData =
          child.parentData! as CartesianAxesParentData;
      child = childParentData.nextSibling;
    }
    (parentBox as RenderBehaviorArea?)?.invalidate();
  }
}