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Carlos Reyes
45
BACKGROUND FOR AXIS LABELS IN LINE ULTRACHART
posted

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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