Implementing Interfaces by Delegation

The implements directive allows you to delegate implementation of an interface to a property in the implementing class. For example, property MyInterface: IMyInterface read FMyInterface implements IMyInterface;

declares a property called MyInterface that implements the interface IMyInterface.

The implements directive must be the last specifier in the property declaration and can list more than one interface, separated by commas. The delegate property

  • must be of a class or interface type.
  • cannot be an array property or have an index specifier.
  • must have a read specifier. If the property uses a read method, that method must use the default register calling convention and cannot be dynamic (though it can be virtual) or specify the message directive.

The class you use to implement the delegated interface should derive from TAggregationObject.

Project Management Made Easy

Project Management Made Easy

What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.

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