Set a Leaf Node’s Color using a TreeMapSeries Object

If you are using a TreeMapSeries object as your data source, the ColorValueIndex property of each TreeMapDataPoint determines the color of the leaf nodes. The color value is relative to the minimum and maximum color values of your treemap chart. The colors of the leaf node is scaled based on the settings of the ColorModel.ColorBegin and ColorModel.ColorEnd properties. For example, if you set every ColorValue property to 3, then every leaf node will be the same color. If the values of your ColorValue properties range from 30 to 100, then the leaf node with the ColorValue property set to 30 will be the minimum color and the leaf node with the ColorValue property set to 100 will be the maximum color.

For more information on using the TreeMapSeries object as a data source, see Working with Treemap Chart Data.

The following example code demonstrates how to set the leaf node’s color if you are using a TreeMapSeries object as your data source.

In Visual Basic:

' Set the mimimum color
Me.ultraChart1.ColorModel.ColorBegin = System.Drawing.Color.Blue
' Set the maximum color
Me.ultraChart1.ColorModel.ColorEnd = System.Drawing.Color.Red
myseries.Points.Add(new TreeMapDataPoint(12, 34, "item1", False))
' The second arg represents the color value
' Set the leaf node color to blue
myseries.Points[0].Points.Add(new TreeMapDataPoint(20, 0, "FirstChildOfItem1",False))
' Set the leaf node color to purple (half way between blue and red
myseries.Points[0].Points.Add(new TreeMapDataPoint(20, 5, "SecondChildOfItem1", False))
' Set the leaf node color to red
myseries.Points[0].Points.Add(new TreeMapDataPoint(20, 10, "ThirdChildOfItem1", False))
Me.ultraChart1.Series.Add(myseries)

In C#:

// Set the mimimum color
this.ultraChart1.ColorModel.ColorBegin = System.Drawing.Color.Blue;
// Set the maximum color
this.ultraChart1.ColorModel.ColorEnd = System.Drawing.Color.Red;
myseries.Points.Add(new TreeMapDataPoint(12, 34, "item1", false));
// The second arg represents the color value
// Set the leaf node color to blue
myseries.Points[0].Points.Add(new TreeMapDataPoint(20, 0, "FirstchildOfItem1", false));
// Set the leaf node color to purple (half way between blue and red)
myseries.Points[0].Points.Add(new TreeMapDataPoint(20, 5, "SecondchildOfItem1", false));
// Set the leaf node color to red
myseries.Points[0].Points.Add(new TreeMapDataPoint(20, 10, "ThirdchildOfItem1", false));
this.ultraChart1.Series.Add(myseries);

Windows Forms | Help Topics

Set a Leaf Node’s Color using a TreeMapSeries Object

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