[jimtabor] 16722: Patch by Robert Shearman [e-mail], Use GdiGetCharDimensions Instead of DIALOG_GetCharSize.

Patch by Robert Shearman rob(a)codeweavers.com, Use GdiGetCharDimensions
Instead of DIALOG_GetCharSize.
Modified: trunk/reactos/lib/gdi32/objects/font.c
Modified: trunk/reactos/lib/user32/include/user32.h
Modified: trunk/reactos/lib/user32/windows/dialog.c
  _____  

Modified: trunk/reactos/lib/gdi32/objects/font.c
--- trunk/reactos/lib/gdi32/objects/font.c	2005-07-24 22:17:02 UTC
(rev 16721)
+++ trunk/reactos/lib/gdi32/objects/font.c	2005-07-25 04:21:29 UTC
(rev 16722)
@@ -806,6 +806,12 @@

  *
  * SEE ALSO
  *  GetTextExtentPointW, GetTextMetricsW, MapDialogRect.
+ *
+ * Despite most of MSDN insisting that the horizontal base unit is
+ * tmAveCharWidth it isn't.  Knowledge base article Q145994
+ * "HOWTO: Calculate Dialog Units When Not Using the System Font",
+ * says that we should take the average of the 52 English upper and
lower
+ * case characters.
  */
 /*
  * @implemented
  _____  

Modified: trunk/reactos/lib/user32/include/user32.h
--- trunk/reactos/lib/user32/include/user32.h	2005-07-24 22:17:02 UTC
(rev 16721)
+++ trunk/reactos/lib/user32/include/user32.h	2005-07-25 04:21:29 UTC
(rev 16722)
@@ -33,5 +33,6 @@

 
 /* FIXME: FILIP */
 HGDIOBJ STDCALL  NtGdiSelectObject(HDC  hDC, HGDIOBJ  hGDIObj);
+DWORD STDCALL GdiGetCharDimensions(HDC, LPTEXTMETRICW, DWORD *);
 
 #endif /* USER32_H */
  _____  

Modified: trunk/reactos/lib/user32/windows/dialog.c
--- trunk/reactos/lib/user32/windows/dialog.c	2005-07-24 22:17:02 UTC
(rev 16721)
+++ trunk/reactos/lib/user32/windows/dialog.c	2005-07-25 04:21:29 UTC
(rev 16722)
@@ -692,11 +692,14 @@

         if (dlgInfo->hUserFont)
         {
             SIZE charSize;
-            if (DIALOG_GetCharSize( dc, dlgInfo->hUserFont, &charSize
))
+            HFONT hOldFont = SelectObject( dc, dlgInfo->hUserFont );
+            charSize.cx = GdiGetCharDimensions( dc, NULL, &charSize.cy
);
+            if (charSize.cx)
             {
                 dlgInfo->xBaseUnit = charSize.cx;
                 dlgInfo->yBaseUnit = charSize.cy;
             }
+            SelectObject( dc, hOldFont );
         }
         ReleaseDC(0, dc);
     }
@@ -1828,7 +1831,8 @@
 
         if ((hdc = GetDC(0)))
         {
-            if (DIALOG_GetCharSize( hdc, 0, &size )) units = MAKELONG(
size.cx, size.cy );
+            size.cx = GdiGetCharDimensions( hdc, NULL, &size.cy );
+            if (size.cx) units = MAKELONG( size.cx, size.cy );
             ReleaseDC( 0, hdc );
         }
     }