Question on use of TextMetricsW

[James McKenzie]

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

[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.

[James McKenzie]

On 10/3/10 11:55 AM, Paul Vriens wrote:
> 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.

Even if I am retrieving the DC for the control through:

hdc = GetDC(hwndRichEdit) and hwndRichEdit is the handle to the control?

Just trying to get a grasp on where GetTextMetricsW is getting its 
information from.

James McKenzie

[James McKenzie]

On 10/3/10 11:55 AM, Paul Vriens wrote:
> 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.

You probably are correct as one of the other 'metrics' is the Character 
Set which returned 0 for both Courier and MS San Serif.  I'll look at a 
different way to get back the information I was looking for.

Thank you for the correction on the use of GetTextMetricsW.

James McKenzie