nanogui: Changing display font in pushbutton control
Subject:
Re: [nanogui] Changing display font in pushbutton control
From:
"Uwe Klatt" ####@####.####
Date:
21 Feb 2007 07:04:47 +0000
Message-Id: <003e01c75586$7e808900$081710ac@arnstein.miwe.de>
Hello Ricardo,
> 4) Now this was a little tricky; I had to change the SET_PBFONT and
> GET_PBFONT macros from:
> #define SET_PBFONT(h,x) (SetWindowWord(h, 8, x))
> #define GET_PBFONT(h) (GetWindowWord(h, 8))
> to:
> #define SET_PBFONT(h,x) (SetWindowLong(h, 8, x))
> #define GET_PBFONT(h) (GetWindowLong(h, 8))
> since the pointers in my system are 32 bits long. As a consequence,
> I had to change the number of extra bytes (wc.cbWndExtra) from 10 to
> 12. Hope there's no problem with that. Actually, aren't most of them
> 32-bit nowadays?
Another way I use:
When creating a new Window (button) and need extra per window data, I
allocate memory for my own memory object (e.g. struct MYDATASTRUCT). This
can be done in WM_CREATE.
This structure can be modified from time to time without thinking about size
of extradata.
After creating a new window you need only a
SetWindowLong(hWnd,GWL_USERDATA,(LPARAM)pMydata);
for adding your additional data to this window.
When you need this data inside of the window proc, you can use similar:
pMydata = (MYDATASTRUCT *)GetWindowLong(hWnd,GWL_USERDATA);
When destroying the window, you should destroy this memory object too. (Can
be one in WM_DESTROY).
Bye
Uwe
