Charts > Using the Charts Library > Data Display > Using Single Displayers > Scatter Displayer
 
Scatter Displayer
A scatter displayer has the following basic characteristics:
Class
Category
Single
Number of real data sets displayed
1
Can be used with all types of projections
Yes
Items drawn
Markers
The following properties are specific to a scatter displayer:
Property
Methods
Default Value
Marker Type
getMarker
setMarker
IlvMarkerFilledSquare
Marker Size
getMarkerSize
setMarkerSize
IlvDefaultMarkerSize
Figure 8.2 illustrates the fact that a scatter displayer can be used with all types of projections. Data sets are represented by scatter displayers in a Cartesian chart (using a Cartesian projection) and in a polar chart (using a polar projection).
Figure 8.2    Scatter Displayers in a Cartesian Chart and in a Polar Chart
We can use the scatter displayer displaying the blue triangles as an example. We can create this displayer by using the following code:
IlvScatterChartDisplayer* displayer =
new IlvScatterChartDisplayer(IlvMarkerFilledTriangle,
IlvDefaultMarkerSize);
displayer->setForeground(dpy->getColor("blue"));
Note: The Drawn Filled property has no meaning for a scatter displayer. The markers are simply drawn with the foreground color of the defined palette.

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