GraphItem

The GraphItem class is used as the ancestor for all implementations of graphs that will be displayed in the SimpleGraph container. It contains a number of constants, getters, and setters, as well as abstract methods that will be implemented in descendent sub-classes, for example, the PieChart class that will be discussed later in this chapter. The constructor and class field code required in GraphItem are shown in Figure 15-21.

Figure 15-20. Pie chart module enumerator listing.
{define-enum public YLabelType
    eNone,
    eLeft,
    eRight
}

{define-enum public ItemDisplayType
    eDontShow,
    eShadowOnly,
    eItemOnly,
    eItemAndShadow
}

GraphItem contains a number of constant variables that represent colors, and these will be used in the sub-classes ...

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