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From: Thomas Steinbach on 29 Sep 2009 09:18
Hello,

how can I change (in plain C/Win32) the font size of a
Sstatic-Text-Control?
I know WM_SETFONT, but that's not the key...

Thomas

From: Christian ASTOR on 29 Sep 2009 11:24
On 29 sep, 15:18, "Thomas Steinbach" <steinb...(a)gmx-topmail.de> wrote:
> Hello,
>
> how can I change (in plain C/Win32) the font size of a
> Sstatic-Text-Control?
> I know WM_SETFONT, but that's not the key...

You must first test the current font.
For example =>

HFONT hFont, hNewFont;
LOGFONT lf;
HDC hDC;
hFont = (HFONT)SendMessage(hStatic1, WM_GETFONT, 0, 0);
if(hDC = GetDC(hStatic1))
{
if (hFont == NULL)
{
hFont = (HFONT) GetStockObject(SYSTEM_FONT);
GetObject(hFont, sizeof(LOGFONT),&lf);
lf.lfQuality = DEFAULT_QUALITY;
lf.lfWidth = 0;
}
else
GetObject(hFont, sizeof(LOGFONT),&lf);
lf.lfHeight = -MulDiv(20, GetDeviceCaps(hDC, LOGPIXELSY), 72);
hNewFont = CreateFontIndirect(&lf);
SendMessage(hStatic1, WM_SETFONT, (WPARAM)hNewFont, MAKELPARAM(TRUE,
0));
ReleaseDC(hStatic1, hDC);
}
From: Thomas Steinbach on 29 Sep 2009 17:55
Helloo Christian,

> You must first test the current font.
> For example =>
> [...]

Great, it's working perfect, but I think it would
better to use the real dpi, determined by GetDeviceCaps.
eg. My Monitor has 96 dpi.

this:

lf.lfHeight = -MulDiv(20, GetDeviceCaps(hDC, LOGPIXELSY), 72);

becomes this:

int dpi = GetDeviceCaps(hDC, LOGPIXELSY);
lf.lfHeight = -MulDiv(20, dpi, dpi);

Think this should work in both cases 72dpi and 96 dpi
and any other resolution

Thomas

From: Scott Seligman on 29 Sep 2009 18:55
"Thomas Steinbach" <steinbach(a)gmx-topmail.de> wrote:
>lf.lfHeight = -MulDiv(20, GetDeviceCaps(hDC, LOGPIXELSY), 72);
>
>becomes this:
>
>int dpi = GetDeviceCaps(hDC, LOGPIXELSY);
>lf.lfHeight = -MulDiv(20, dpi, dpi);

The 72 refers to the number of points per inch, it's a constant value,
from typography, that doesn't change to match your monitor's settings.

Your change sets lfHeight to -20 always, irregardless of the current
DPI.


--
--------- Scott Seligman <scott at <firstname> and michelle dot net> ---------
There are fewer great satisfactions than that of self.
-- Calhoun in Star Trek: New Frontier: Being Human by Peter David
From: Thomas Steinbach on 30 Sep 2009 04:50
Hello Scott,

>> lf.lfHeight = -MulDiv(20, GetDeviceCaps(hDC, LOGPIXELSY), 72);
> [...]

> The 72 refers to the number of points per inch, it's a constant value,
> from typography, that doesn't change to match your monitor's settings.
>
> Your change sets lfHeight to -20 always, irregardless of the current
> DPI.

okay. Didn't recognize this. Thank you.

Thomas
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