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Carlos Reyes
45
BACKGROUND FOR AXIS LABELS IN LINE ULTRACHART
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Hi Infragistics Team

I've been working with in infragistics line graph, but need to customize axis labels, to bring them a color.
The chart that I have now looks like this:

But what I need is to paint a white box on each label values as shown below:


Is this possible?

thanks

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  • 29105
    Verified Answer
    Offline posted

    Hi,

    You can use the FillSceneGraph event to add a box primitive to be used as the background color for your data point labels. eg. (Line Chart)

      void ultraChart1_FillSceneGraph(object sender, Infragistics.UltraChart.Shared.Events.FillSceneGraphEventArgs e)
            {
               
               Polyline line = null;

                foreach (Primitive p in e.SceneGraph)
                {
                    if (p is Polyline)
                    {
                        line = p as Polyline;
                        break;
                    }
                }

                if (line == null) return;

                foreach (DataPoint point in line.points)
                {
                    Text label = new Text();
                    string str = point.Value.ToString();

                    label.SetTextString(str);
                    SizeF labelSize = Platform.GetLabelSizePixels(str, label.labelStyle);

                    Rectangle bounds = new Rectangle(
                        point.point.X - (int)labelSize.Width / 2,
                        point.point.Y - (int)labelSize.Height,
                        (int)labelSize.Width,
                        (int)labelSize.Height);

                    label.bounds = bounds;

                    Box background = new Box(bounds);
                  
                    background.PE.Fill = Color.PaleGoldenrod;
                    background.PE.StrokeWidth = 0;
                    background.PE.ElementType = PaintElementType.SolidFill;
                   
                    e.SceneGraph.Add(background);
                    e.SceneGraph.Add(label);

                }
            }

    I'm working on figuring out if primitives/rectangle suppor shadow effects. Let me know if you have any questions regarding this matter. 

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