Decorator

НАЗНАЧЕНИЕ
Динамически порождает объекты

РЕАЛИЗАЦИЯ
ABSTRACT CLASS COMPONENT
{
PUBLIC ABSTRACT VOID DRAW();
}

CLASS CONCRETECOMPONENT : COMPONENT
{
PUBLIC OVERRIDE VOID DRAW()
{
}
}

ABSTRACT CLASS DECORATOR : COMPONENT
{
PROTECTED COMPONENT COMPONENT;
PUBLIC VOID SETCOMPONENT(COMPONENT COMPONENT)
{
THIS.COMPONENT = COMPONENT;
}
{
IF (COMPONENT != NULL)
{
COMPONENT.DRAW();
}
}
}

CLASS SCROLLDECORATOR : DECORATOR
{
{
BASE.DRAW();
SCROLLTO();
}
PRIVATE VOID SCROLLTO()
{
}
}

CLASS BORDERDECORATOR : DECORATOR
{
{
BASE.DRAW();
DRAWBORDER();
}
PRIVATE VOID DRAWBORDER()
{
}
}

// CREATE CONCRETECOMPONENT AND TWO DECORATORS
CONCRETECOMPONENT TEXTVIEW = NEW CONCRETECOMPONENT();
SCROLLDECORATOR SCROLLDECORATOR = NEW SCROLLDECORATOR();
BORDERDECORATOR BORDERDECORATOR = NEW BORDERDECORATOR();
// LINK DECORATORS
SCROLLDECORATOR.SETCOMPONENT(TEXTVIEW);
BORDERDECORATOR.SETCOMPONENT(SCROLLDECORATOR);
SCROLLDECORATOR.DRAW();
BORDERDECORATOR.DRAW();

Decorator

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Decorator