Class methods in D?

[Sean Cavanaugh]

On 5/3/2012 1:32 PM, Simon wrote:
> On 03/05/2012 18:21, Mehrdad wrote:
>> In Windows, you need to register a "window class" before you can
>> actually create an instance of it.
>
> If you are mucking about on 'doze you might find my dubious port of the
> ATL window classes relevant:
>
> http://www.sstk.co.uk/atlWinD.php
>
> That does all that tedious registering of windows classes etc.
> I used a static class member IIRC.
>
> I've ripped this off of MS so use at your own risk. ;)
>

Heh, I've got a miniature (probably 20-30% complete) version of the WTL 
ported to D here, but without any ATL aside from the parts of CWindow.

The WTL uses the curiously recurring template design which also works in 
D, so a window class is something like this in D:


class GameWindow : CWindowUserBase!(CWindow, GameWindow)
{
     bool isFullscreen;
     bool isResizing;
     bool suppressRendering;
     bool allowCapture;
     wGameMessageLoop messageLoop;
     GameScene gameScene;
     RenderDevice renderDevice;
     DeviceContext immediateContext;
     SwapChain swapChain;
     Tid renderingThread;

     mixin DECLARE_WND_CLASS!("wWindowClass", CS_HREDRAW | CS_VREDRAW | 
CS_DBLCLKS, COLOR_WINDOWFRAME);

     static DWORD GetWndStyle(DWORD InStyle)
     {
         return InStyle | WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | 
WS_CLIPSIBLINGS;
     }
     static DWORD GetWndExStyle(DWORD InStyleEx)
     {
         return InStyleEx | WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
     }
     static string GetWndCaption()
     {
         return "";
     }

/// lots of code deleted

     mixin(HOOK_MSG_WM_DESTROY!(OnDestroy));
     mixin(HOOK_MSG_WM_MOVE!(OnMove));
     mixin(HOOK_MSG_WM_SIZE!(OnSize));


     mixin REGISTER_MESSAGE_MAP!(
         BIND_MSG_WM_DESTROY!(OnDestroy),
         BIND_MSG_WM_MOVE!(OnMove),
         BIND_MSG_WM_SIZE!(OnSize));

     mixin MESSAGE_HANDLER!();
}




So the answer to the OP's question is, make the class stuff static and 
use mixins for the functions so the scope works out.