Prof Brian Ripley <[EMAIL PROTECTED]> writes:
> > <Tcl> 743 > > > > I could convert pixels to characters, but wonder whether I can get the > > latter directly. > > I suspect you may have some difficulty with the latter, even in a > monospace font. Notice that 486 is not a multiple of 80, and if that > is actually 81, 743 is not a multiple of 6. > > I was trying to do this with heights for a listbox a few days ago, and > it seems that the line spacing is actually 1 pixel greater than is > reported. Since you can resize to a non-integer number of lines I > don't believe (and I tried to read the source code) that Tcl/Tk works > internally with characters. I think that's actually an issue that involves the window manager too. I don't think all WMs know how to deal in integer number of characters. Anyways, the following piece of Tcl seems to do the trick: % expr ([winfo width .a] - 2 * [.a cget -borderwidth] - 4)/[font measure [.a cget -font] 0] 27 Converting to R is left as an exercise... If I got it right then the point is that at either side of the window you have by 1 pixel, n border pixels, and 1 spacer pixel before the first character. -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ R-devel@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
