Max:

The ClipTextAxisLabelLayoutBehavior behavior is exactly what I would like to accomplish, but I can't seem to apply it to the ChartTextAppearances of my stacked column chart.  Any suggestions on how to make the ChartText comply with that behavoir restriction? (I've tried all the permutations I could think of.) In the meantime, I'll move forward with your FillSceneGraph suggestion.

Thanks, O Great Chart Guru!

At your service,

Jeff

Silly me, I gave you a solution for the axis labels instead of chart text labels.

You can't use axis layout behaviors for this one, so it's a bit trickier. The chart needs to be re-invalidated because label renderer fires before FillSceneGraph has a chance to get the column width. Anyways, this should work:

public partial class Form1 : Form
{

public Form1()
{
   InitializeComponent();
}

LabelRenderer myLabelRenderer;

private void Form1_Load(object sender, EventArgs e)
{
   myLabelRenderer = new LabelRenderer();
   myLabelRenderer.ChartControl = chart;
   Hashtable labelHash = new Hashtable();
   labelHash.Add("MYLABEL", myLabelRenderer);
   chart.LabelHash = labelHash;

   ChartTextAppearance chartText = new ChartTextAppearance();
   chartText.Column = chartText.Row = -2;
   chartText.Visible = true;
   chartText.ItemFormatString = "<MYLABEL>";
   myLabelRenderer.Font = chartText.ChartTextFont;
   chart.ColumnChart.ChartText.Add(chartText);

   chart.Data.DataSource = new int[,] { { 1, 1, 1 }, { 2, 2, 2 }};
   chart.Data.SetColumnLabels(new string[ { "really really long column label that should be truncated" });
}

private void chart_FillSceneGraph(object sender, Infragistics.UltraChart.Shared.Events.FillSceneGraphEventArgs e)
{
   foreach (Primitive p in e.SceneGraph)
   {
      Box box = p as Box;
      if (box != null && box.Layer != null && box.Row != -1 && box.Column != -1)
      {
         myLabelRenderer.ColumnWidth = box.rect.Width;
        break;
      }
   }
}
}

class LabelRenderer : IRenderLabel
{
public double ColumnWidth { get; set; }
public Font Font { get; set; }
public UltraChart ChartControl { get; set; }

public string ToString(Hashtable context)
{
   if (ColumnWidth <= 0)
   {
      ChartControl.InvalidateLayers();
      return "";
   }

   string label = (string)context["ITEM_LABEL"];
   SizeF labelSize = Platform.GetStringSizePixels(label, this.Font);
   if (labelSize.Width > ColumnWidth)
   {
      return label.Substring(0, Convert.ToInt32(label.Length * ColumnWidth / labelSize.Width));
   }
   return label;
}
}