BarLineChartViewBase doubleTapGestureRecognized

[757388559]

This is source code for charts:
@objc private func doubleTapGestureRecognized(_ recognizer: NSUITapGestureRecognizer)
{
if _data === nil
{
return
}

    if recognizer.state == NSUIGestureRecognizerState.ended
    {
        if _data !== nil && _doubleTapToZoomEnabled && (data?.entryCount ?? 0) > 0
        {
            var location = recognizer.location(in: self)
            location.x = location.x - _viewPortHandler.offsetLeft
            
            if isTouchInverted()
            {
                location.y = -(location.y - _viewPortHandler.offsetTop)
            }
            else
            {
                location.y = -(self.bounds.size.height - location.y - _viewPortHandler.offsetBottom)
            }
            
            self.zoom(scaleX: isScaleXEnabled ? 1.4 : 1.0, scaleY: isScaleYEnabled ? 1.4 : 1.0, x: location.x, y: location.y)
        }
    }
}

we can know the scale factor is fixed, we can't set it，And the doubleTapGestureRecognized don't
use scale delegate。
The question:
1.How to set the scale factor?
2.hope the scale delegate is used

[liuxuan30]

it's in ChartTransformer and ViewPortHanlder.