Smrf.NodeXL.Visualization.Wpf.VertexDrawer.GetLabelFontSize C# (CSharp) Method

    GetLabelFontSize
    (
        IVertex oVertex
    )
    {
        Debug.Assert(oVertex != null);
        AssertValid();

        // Start with the default font size.

        Double dLabelFontSize = m_oFormattedTextManager.FontSize;

        Object oPerVertexLabelFontSizeAsObject;

        // Check for a per-vertex font size.  Note that the font size is stored
        // as a Single in the vertex's metadata to reduce memory usage.

        if ( oVertex.TryGetValue(ReservedMetadataKeys.PerVertexLabelFontSize,
            typeof(Single), out oPerVertexLabelFontSizeAsObject) )
        {
            dLabelFontSize = (Double)(Single)oPerVertexLabelFontSizeAsObject;

            if (dLabelFontSize <= 0)
            {
                throw new FormatException( String.Format(

                    "{0}: The vertex with the ID {1} has a non-positive"
                    + " ReservedMetadataKeys.PerVertexLabelFontSize value."
                    ,
                    this.ClassName,
                    oVertex.ID
                    ) );
            }
        }

        return (dLabelFontSize * m_dGraphScale);
    }