[changeset] Missing ScreenSize & ScreenPixelsPerInch properties

[John W. Eaton]

On 22-Jan-2009, Shai Ayal wrote:

| On Thu, Jan 22, 2009 at 4:56 AM, John W. Eaton <jwe at octave.org> wrote:
| > On my system, X11 returns slightly different values for the X
| > and Y dimensions in millimeters, so the computed pixels per inch in
| > each direction is different.  I average the two to come up with a
| > single value (94.514 on my system).  But I'm not sure that this is the
| > correct thing.  Comments?
| 
| I thought this was a backend related task not really belonging in
| "core" octave. However I understand gnuplot does not give this info.
| 
| the fltk backend (quite stagnant at the moment) updates screensize
| only since fltk only reports the width and height of the screen in
| pixels, not in any other units, so I suppose we will have to use code
| like you propose in it as well.

Things like

  octave:1> get (0, 'screensize')
  ans =

	1      1   1600   1200

  octave:2> set (0, 'units', 'inches')
  octave:3> get (0, 'screensize')
  ans =

      0.00000    0.00000   16.92877   12.69658

will work without creating a figure.  So it might as well be something
that is part of the core.

jwe