nanogui: Changing display font in pushbutton control
Subject:
RES: [nanogui] Changing display font in pushbutton control
From:
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Date:
20 Feb 2007 16:15:33 +0000
Message-Id: <20070220125045.d6wgzutr6ecggccc@mail.utfpr.edu.br>
Hi Greg und Uwe,
I have followed your hints trying to make the pushbutton control able to display
fonts other than the DEFAULT_GUI_FONT. Guess what, it's working now, thanks!
Here's a short script of what I've done:
1) Create a copy of button.c in the winlib folder. Called it "fancybutton.c".
2) Just for the sake of organization, I changed all function names starting with
button_ to fancybutton_, and the class name from "BUTTON" to "FANCYBUTTON".
3) Changed line 514 from:
hNewFont = GetStockObject( DEFAULT_GUI_FONT);
to:
hNewFont = (HFONT) GET_PBFONT(hwnd);
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?
5) In the message handler, I added the following:
case WM_SETFONT:
fancyButton_OnSetFont(hwnd, (HFONT)wParam, 0L);
return 0;
For some reason, I wasn't able to define the HANDLE_BM_SETFONT and
FORWARD_BM_SETFONT macros correctly. Honestly, I didn't understand their
reasoning quite enough, so I just added the case above.
6) Commented out the CheckRadioButton(...) function definition, since it is
already in button.c.
That would be all! But since I was already at it, I added an additional check
for the BS_FLAT style flag before drawing the 3d box surrounding the pushbutton
control.
Thanks for your hints and advice; I hope there's nothing fundamentally wrong
with the above changes.
Also, since it's starting to look so nice, I think I won't stop messing with the
controls yet. Next I'll add some code to change the text color for the control
(currently hardcoded as COLOR_BTNTEXT), so that each button can have its own
attribute. I see two immediate choices for that; one would be doing like Uwe
suggested (creating a new structure with all the newly added parameters for the
control), and the other would be increasing the number of extra bytes to hold
another 3 or 4 bytes for the color value. Does anyone have an advice for or
against one of these approaches? (or a better suggestion perhaps?)
Thanks a lot,
Ricardo Jasinski.
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-----Mensagem original-----
De: Greg Haerr ####@####.####
Assunto: Re: [nanogui] Changing display font in pushbutton control
: My first attempt was sending the WM_SETFONT message to the standard
: button control in microwindows, but it apparently doesn't handle this
: specific message. The code that should do it is commented out in the
: control's window procs (cenButtonWndFn) and in other places inside
: the button.c file (#if 0 static void WINAPI cenButton_OnSetFont()).
I commented out the SETFONT code when I brought in
this control from another library. Uncomment it and add
code (after looking at the win32 documentation) to
implement a font change, and you should be in business.
Regards,
Greg
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