The Art of Delphi Programming – The interface approach introduced in Part 2 of this series and extended in Part 3 did cover most of our needs. But there is nothing that can’t be done better with the right tools. I’ve been using this approach for a couple of years and it made my life a lot easier. You need an export as DXF? No problem! Displaying in OpenGL? I’ll write a new visitor! Writing the additional interfaces was easy done with the help of a customized code template, so that has never been a pain. The only thing that bothered me over time was that I could only apply the Visitor Pattern to classes I ...
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