Questions

Hello,

This question is related to this discussion :
https://www.scichart.com/questions/wpf/export-chart-with-heatmapcolormap

I want to export a chart as XPS and have the HeatmapColorMap on the XPS. I put the HeatmapColorMap inside a CustomAnnotation. I had an issue with the ticks and labels not appearing on the printed XPS so I was advised to use a workaround :

public class SciChartSurfaceEx : SciChartSurface
{
    protected override SciChartSurfaceBase CreateCloneOfSurfaceInMemory(Size newSize)
    {
        // Grab custom annotation that stores HeatmapColormap on a real chart
        var originalColormapAnnotation = (CustomAnnotation)this.Annotations.Where(x => x.GetType() == typeof(CustomAnnotation)).FirstOrDefault();
        var originalColorMap = originalColormapAnnotation.Content as HeatmapColorMap;

        // Perform exporting functionality(serializing\deserializing)
        var cloned = (SciChartSurface)base.CreateCloneOfSurfaceInMemory(newSize);

        var newWindow = new Window();
        newWindow.Content = cloned;
        newWindow.Show();
        newWindow.Close();

        return cloned;
    }
}

Opening a new window is a workaround to prevent the HeatmapColorMap from disappearing after exporting, because it disappears otherwise.
This works fine when exporting a PNG at non-default size but it does not work when exporting as XPS. I get the following exception :

System.InvalidOperationException: ‘Specified element is already the logical child of another element. Disconnect it first.’

Why do I have this exception ? Is there any way around it ?
There are quite a few bugs when exporting charts, it would be nice to have them fixed.

Thank you in advance !