clyne@redcloud.ucar.edu (John Clyne) (02/28/89)
Hello, Can someone tell me why the following code fragment won't return the font used by the label widget? thanks in advance - jc Widget label; int n; XFontStruct font; | | | n = 0; XtSetArg(args[n], XtNlabel, "label"); n++; label = XtCreateManagedWidget( "label", labelWidgetClass, panel, args, n ); /* * get font */ n = 0; XtSetArg(args[n], XtNfont, &font); n++; XtGetValues(comm, args, n); /* * length of string in pixels */ width = XTextWidth(&font, "string", strlen("string"); John Clyne (clyne@bierstadt.ucar.edu) c/o National Center for Atmospheric Research P.O. Box 3000 Boulder, Colorado 80307 (303) 497-1236 %%% Its a small world. But I wouldn't want to paint it %%% S. Wright %%% %%%
yong@metasoft.UUCP (Yongdeng Chen) (03/01/89)
In article <1489@ncar.ucar.edu>, clyne@redcloud.ucar.edu (John Clyne) writes: > > Hello, Can someone tell me why the following code fragment won't return > the font used by the label widget? > > n = 0; > XtSetArg(args[n], XtNlabel, "label"); n++; > label = XtCreateManagedWidget( "label", labelWidgetClass, panel, > args, n ); > /* > * get font > */ > n = 0; > XtSetArg(args[n], XtNfont, &font); n++; > XtGetValues(comm, args, n); > I had similar problem with XtGetValues(comm, args, n); It seems to me that XtGetValues is not doing anything. For example: int x; x = 200; n = 0; XtSetArg(args[n], XtNx, &x); n++; XtGetValues(comm, args, n); you will have x == 200 here. Am I missing something also? ____________________________________________________________ yong%metasoft@bbn.com Yongdeng Chen Meta Software Corporation 150 Cambridge Park Drive Cambridge, MA 02140 (617)576-6920
jmberkley@watnext.waterloo.edu (J. Michael Berkley) (03/06/89)
In article <1489@ncar.ucar.edu> clyne@redcloud.ucar.edu.UUCP () writes: > >Hello, Can someone tell me why the following code fragment won't return >the font used by the label widget? > > /* > * get font > */ > n = 0; > XtSetArg(args[n], XtNfont, &font); n++; > XtGetValues(comm, args, n); > > /* > * length of string in pixels > */ > width = XTextWidth(&font, "string", strlen("string"); I've been having trouble with this too. Using XtGetValues() didn't work for finding the font, so I started poking around in the public and private structures for the Text Sink. It turns out that the font element is ALWAYS NULL in the public sink struct, but is set correctly in the private sink struct. XtGetValues() must be looking at the public struct. ****************************************** * Mike Berkley, University of Waterloo * * PAMI Lab * * jmberkley@watnext.waterloo.edu * * jmberkley@watnext.UWaterloo.CA * * {utai,uunet}!watmath!watnext!jmberkley * ******************************************