Contents  Introduction  The Design  The Plan  Implementation  Window  Management  Coordinate  Systems  Window Drawing  Window  Messages  Wrapping it up  Printable version     The Series  Part I  Part II  Part III  Part IV

The Implementation

Here we go. Here's a good start for our base-class window definition:

As you peruse the functions we'll be talking about, keep in mind that recursion is everywhere. For example, our game will be drawing the entire GUI system by making a call to the renderall() method of the root window, which will in turn call the renderall() methods of its subwindows, which will call renderall() for their subwindows, and so on. Most of the functions follow this recursive pattern.

The whole GUI system will be contained within one global static variable - the root window. To be on the safe side, I encapsulated this variable within a global GetDesktop() function.

Now that we've got the header, let's start filling in some functions, starting with the Window Management code…

Next : Window Management