Question on use of TextMetricsW

[Paul Vriens]

On 10/03/2010 08:44 PM, James McKenzie wrote:
> All:
>
> I am running code like the following in a richedit control to set the
> font to Courier 12 point font:
>
>
> + static const WCHAR courier[] = {'C','o','u','r','i','e','r',0};
> + testFont1 = CreateFontW (12,0,0,0,FW_LIGHT, 0, 0, 0, ANSI_CHARSET,
> + OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH |
> + FF_DONTCARE, courier);
> +
> + /*Set test font to be Courier font */
> + SendMessageW(hwndRichEdit, WM_SETFONT, (WPARAM)testFont1,
> MAKELPARAM(TRUE, 0));
> + /*Verify font is set */
> + SendMessageW(hwndRichEdit, EM_GETCHARFORMAT, SCF_DEFAULT, (LPARAM)
> &CharFont1Unicode);
> + GetObjectW(testFont1, sizeof(LOGFONTW), &sentLogFont);
> + ok (!lstrcmpW(sentLogFont.lfFaceName, CharFont1Unicode.szFaceName),
> "WM_SETFONT set wrong font. " \
> + "Font was set to %s or %s, was supposed to be \"Courier\".\n",
> wine_dbgstr_w(CharFont1Unicode.szFaceName),
> wine_dbgstr_w(sentLogFont.lfFaceName));
> +
> + ret = GetTextMetricsW (hdc, &tmw);
> + ok (ret, "GetTextMetricsW failed\n");
> +
> + ok (7 == tmw.tmAveCharWidth, "Average Character Width for Courier 12
> is %d\n", tmw.tmAveCharWidth);
>
> I also set the font to MS Sans Serif, and two different font sizes for
> Arial. However, the tmAveCharWidth value remains at 7 and I am of the
> opinion that this should change for each font change and also for the
> font size change. Am I doing something improper? Should I clear the tmw
> structure between calls to GetTextMetricsW?
>
> When I run this on native WindowsXP (which I have access to) the average
> character width changes to 9, but remains the same for all four font types.
> TTIA.
>
> James McKenzie
>
>
>
Hi James,

Doesn't the WM_SETFONT only set it for the control? You are retrieving 
the font characteristics from the DC though.

-- 
Cheers,

Paul.