Posted by Johannes Permoser on 01/19/08 23:32

Hi,

i'va got a class 'Page'. One of it members is an instance of a template engine.
The Page-class has a method render() which calls the functions read(),
transform(), transport() and starts the template engine.

Now I want to reuse the Page class for a more specialized page 'ImagePage'. So:
ImagePage extends Page. This Page contains an extra picture and therefore needs
to call image() before starting the template engine. How do i smartly integrate
that call into the Page::render() function.

I could override the whole funtion, but then i'd have to copy and paste the
whole code for the calls of read(), transform(), transport()?
What's the professional way here?

Johannes

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