How Application Framework Functions

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Application Framework is built on a Document/View architecture (see The Document/View Architecture). Figure 21.1 illustrates the different classes that the Document/View mechanism relies upon.

Figure 21.1 Document/View Classes

All the classes shown in the figure, except the IlvDvApplication class, the IlvDvDocument hierarchy, and the IlvDvDocViewInterface hierarchy, are hidden from the developer. Instances of these classes are automatically created according to the application options that are read while the application is initializing.

The code of an Application Framework application consists of:

Option Files: At least one option file, which is edited using the Application Framework Editor.

Main File: A main file containing the main entry point of the program, which must instantiate an IlvDvApplication (or a derived class) object. This file is generated by the Application Framework Editor and must only be completed in very specific cases, as shown in the Text sample.

Implementation of a Document Class: Files implementing a document class, which is a subclass of IlvDvDocument.

Implementation of a Document View Class: Files implementing a document view class, which is a subclass of IlvDvDocViewInterface class.

Version 6.0