New subject: Time date control panel applet bug and DrawStatusText issues

28 Sep 2006

Hello list!,
i have two questions that i hope that someone of you could answer.

The first one:
- Should RegOpenKeyExW() do a SetLastError() or it just return an
error code?
I ask this because in the timedate control panel applet,
GetSyncSetting() reads a key from the registry using that function
and if it fails it calls the function GetError() that calls
FormatMessage() using GetLastError() as an argument. For some
reason in my computer this call fails and i receive an window
that says "ERROR_INVALID_WINDOW_HANDLE" that obviously is not
the right error code.

This bug could be reproduced by double clicking in the Hour
located in the right corner of the start menu bar. Next you
click the Internet Time tab and you should receive the error.

To fix this i can think of two possibilities:
- Modify RegOpenKeyExW() to do a SetLastError() if this fails
to set a right code for GetLastError(), or
- Modify the GetError() function in the timedate control panel
applet
I don't know which is the right way to fix this.

Finally in my opinion, if an error occurs in this situation
i think that no message should appear because i think that
is not too bad if this key isn't present.

And the second question follows...
- I have written a program that displays a Status bar using
the DrawStatusText() function. In Windows it is working pretty
well but in ReactOS it doesnt. DrawStatusText() in ReactOS doesnt
draw a background when calling this function thus my status
window draws over itself each time i receive a WM_PAINT message.
So its clear that in windows DrawStatusText() draws a background
before painting the text, but in ReactOS it doesnt. Currently i
have hacked the DrawStatusText() function to draw a background
like this:

void WINAPI DrawStatusTextW (HDC hdc, LPRECT lprc, LPCWSTR text, UINT style)
{
     RECT r = *lprc;
     UINT border = BDR_SUNKENOUTER;
     HBRUSH hBkBrush, hOldBrush;

     if (style & SBT_POPOUT)
         border = BDR_RAISEDOUTER;
     else if (style & SBT_NOBORDERS)
         border = 0;

     DrawEdge (hdc, lprc, border, BF_RECT|BF_ADJUST);

     /* now draw text */
     if (text) {
         int oldbkmode = SetBkMode (hdc, TRANSPARENT);
         UINT align = DT_LEFT;
         if (*text == L'\t') {
	    text++;
	    align = DT_CENTER;
	    if (*text == L'\t') {
	        text++;
	        align = DT_RIGHT;
	    }
         }
         r.left += 3;
         if (style & SBT_RTLREADING)
	    FIXME("Unsupported RTL style!\n");

	// yep this fixed the problem, but i don't know what the
	// right color it is
	hBkBrush = GetSysColorBrush(GetSysColor(COLOR_BTNFACE));
	hOldBrush = SelectObject(hdc, hBkBrush);
	FillRect(hdc, lprc, hBkBrush);

         DrawTextW (hdc, text, -1, lprc, 
align|DT_VCENTER|DT_SINGLELINE|DT_NOPREFIX);

         SelectObject(hdc, hOldBrush);

         SetBkMode(hdc, oldbkmode);
     }
}

Attached i send the code that shows this "bug" and a precompiled binary.
Also i have tested this program under WINE with the same results 
(0.9.x i think).

Thats all,
Best regards,
Felipe Villarroel

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