Step Displayer

A step displayer has the following basic characteristics:

Class	IlvStepChartDisplayer
Category	Single
Number of real data sets displayed	1
Can be used with all types of projections	Yes
Items drawn	Steps

Step Displayers in a Cartesian Chart and in a Polar Chart illustrates the fact that a step displayer can be used with all types of projections. Data sets are represented by step displayers in a Cartesian chart (using a Cartesian projection) and in a polar chart (using a polar projection).

Step Displayers in a Cartesian Chart and in a Polar Chart

We can use the step displayer displaying the red steps as an example. We can create this displayer by using the following code:

IlvStepChartDisplayer* displayer = new IlvStepChartDisplayer(); displayer->setForeground(dpy->getColor("red"));

Note The Drawn Filled property has no meaning for the step displayer. The steps are simply drawn with the foreground color of the defined palette.