The LabelLayout Renderer

Developing with the SDK > Using and Adding Renderers > Predefined Renderers > The LabelLayout Renderer

The LabelLayout Renderer

The LabelLayout renderer performs a label layout algorithm. It is useful when the graphic objects that represent the data model have labels and you want to minimize the overlap of these labels with other labels or other graphic objects. The algorithm will try to move the labels around their original position (for node labels) or along their link (for link labels) to minimize the overlaps.

The LabelLayout renderer uses the classes of the package ilog.views.graphlayout.labellayout, available since ILOG JViews 5.0. The label layout algorithm applied is the "simulated annealing" algorithm.

Table 4.17 lists the properties of the LabelLayout renderer.

Table 4.17 Global Properties of the LabelLayout Renderer

Property	Type	Default	Description
enabled	boolean	`true`	Enables/disables the label layout algorithm.
layoutOfGeneralLinkLabelsEnabled	boolean	`true`	If `true`, the labels of `IlvGeneralLink` objects will be laid out. If `false`, general link labels are left unchanged.
layoutOfGeneralNodeLabelsEnabled	boolean	`true`	If `true`, the labels of `IlvGeneralNode` objects will be laid out. If `false`, general node labels are left unchanged.

The LabelLayout renderer does not have any per-object rendering properties.

You can set any property of the ilog.views.sdm.IlvAnnealingLabelLayout object used by this renderer. For details see Setting Properties of IlvGraphLayout Objects.

See the class ilog.views.sdm.renderer.graphlayout.IlvLabelLayoutRenderer for more details.

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