ZoomExtends on either yaxis or chart

Hi Markus,

I think you’ll need to create a custom modifier to do this, but it shouldn’t be too hard. Head over to our KnowledgeBase to see articles on Custom Chart Modifiers.

• You’ll need to create a class which inherits ChartModifierBase
• You’ll need to override OnModifierDoubleClick()
• You’ll need to use this code to detect whether the double-click occurred on an Axis or not
• You’ll need to use this code to ZoomExtents on one axis

If you come up with a good solution, feel free to post it here as a code sample!

Best regards,
Andrew

So here is my CustomZoomExtendsModifier:

Depending on where you make a double click (Chart, XAxis, YAxis) it zooms to its maximum range.

public class CustomZoomExtendsModifier : ChartModifierBase
{
    public override void OnModifierDoubleClick(ModifierMouseArgs e)
    {
        bool isOnChart = IsPointWithinBounds(e.MousePoint, ModifierSurface);

        foreach(var yAxis in YAxes)
        {
            if(IsPointWithinBounds(e.MousePoint, yAxis))
            {
                var range = yAxis.GetMaximumRange();
                yAxis.AnimateVisibleRangeTo(range, TimeSpan.FromMilliseconds(500));
            }             
        }

        foreach(var xAxis in XAxes)
        {
            if(IsPointWithinBounds(e.MousePoint, xAxis))
            {
                var range = xAxis.GetMaximumRange();
                xAxis.AnimateVisibleRangeTo(range, TimeSpan.FromMilliseconds(500));
            }             
        }

        if(isOnChart)
        {
            this.ParentSurface.AnimateZoomExtents(TimeSpan.FromMilliseconds(500));
        } 

        e.Handled = true;
        base.OnModifierDoubleClick(e);
    }
}

Regards Markus