Instances of the IlvManager class handle a set of graphic objects derived from the ILOG JViews class called IlvGraphic. To organize graphic objects in a manager you place them in multiple storage areas called layers. The different graphic objects stored throughout the manager all share the same coordinate system. For this reason, a manager is a tool designed to handle objects placed on different priority levels. "Priority level" here means that objects stored in a higher screen layer are displayed in front of objects in lower layers. Each graphic object stored in a layer is unique to that layer and can be stored only in that layer.
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