Rif.: How to get the title bar text display length in pixels?

[tstanley]

Hi,

Does anyone know how to obtain the display length (in pixels) of the title bar text?  To make things clear, this is what I'm looking for:

I don't see a CVI function for this.  The ATTR_TITLE_FONT attribute for GetPanelAttribute(...) is only valid for child panels which precludes me from using GetTextDisplaySize(...) to get the size.  Diving into the Windows SDK I can't even find an answer there.  Any ideas?  Thanks.

[tstanley · Accepted solution]

Figured out how to do this.  You have to go into the SDK to get the font properties - how this is done is kind of non-obvious.  But once you have the font properties you can create a meta font in CVI, with the properties, and once you have the meta font you can use GetTextDisplaySize(...) to get the size.  For future reference:

//define a NONCLIENTMETRICS structure
NONCLIENTMETRICS ncmtest;
//We have to set the cbSize parameter to the size of the passed structure before retrieving it
ncmtest.cbSize = sizeof(NONCLIENTMETRICS);
//Get NONCLIENTMETRICS structure
result = SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &ncmtest, 0);

//copy the title font name to a c-string
while(ncmtest.lfCaptionFont.lfFaceName[i] != 0)
{
	thefont[i] = (char)ncmtest.lfCaptionFont.lfFaceName[i];
	++i;
}

//null terminate
thefont[i] = '\0';

//create meta font with title font properties.  lfWeight & 0x700 indicates bold.  CreateMetaFontWithCharacterSet() doesn't recognize DEFAULT_CHARSET so we replace it with VAL_NATIVE_CHARSET(?).
uir_status = CreateMetaFontWithCharacterSet ("TheTitleFont", thefont, abs(ncmtest.lfCaptionFont.lfHeight), ncmtest.lfCaptionFont.lfWeight & 0x700 ? 1 : 0, ncmtest.lfCaptionFont.lfItalic, ncmtest.lfCaptionFont.lfUnderline, ncmtest.lfCaptionFont.lfStrikeOut, 0, ncmtest.lfCaptionFont.lfCharSet == DEFAULT_CHARSET ? VAL_NATIVE_CHARSET : ncmtest.lfCaptionFont.lfCharSet);

//get titlebar text
uir_status = GetPanelAttribute (panelhandle, ATTR_TITLE, thetext);
//get title bar length
uir_status = GetTextDisplaySize (thetext, "TheTitleFont", &height, &width);

 I get 79 for the length from the screenshot above.

[RobertoBozzolo]

I suppose this native (easier) method can be applied to window title too. You don't need  WinSDK to use it.

[tstanley]

Hi,

I'm actually using GetTextDisplaySize(..).  The problem is that I need the font used on the title bar and its properties, and I couldn't find a way to get the font properties of the title bar of a top-level (non-child) window through CVI.  If I'm wrong please let me know!