[Octave-bug-tracker] [bug #34198] changing figure units produces erratic behavior

[Ben Abbott]

URL:
  <http://savannah.gnu.org/bugs/?34198>

                 Summary: changing figure units produces erratic behavior
                 Project: GNU Octave
            Submitted by: bpabbott
            Submitted on: Fri 02 Sep 2011 12:05:53 PM EDT
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: Ben Abbott
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Mac OS

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Details:

Changing a figure's units produced erratic behavior on MacOS when using the
FLTK backend. I assume the same behavior will occur for Linux? / Windows?

Gnuplot works as expected.

Running the script below ...


units = {"centimeters", "inches", "pixels", "points"};
graphics_toolkit gnuplot
close all
for u = 1:numel(units)
  figure (u, "units", units{u}, "name", units{u})
  surf (peaks)
  p = get (gcf, "position");
  fprintf ("position = [%f, %f, %f, %f] %s\n", p, units{u})
endfor


... produces the text ...


position = [11.151864, 7.087403, 14.225612, 10.669209] centimeters
position = [4.390497, 2.790316, 5.600635, 4.200476] inches
position = [440.000000, 280.000000, 560.000000, 420.000000] pixels
position = [316.115819, 200.902764, 403.245692, 302.434269] points


These results are correct (my "screenpixelsperinch" is 99.989)

However, when the units are centimeters or inches the figure is *not* visible.


The figure, with units = points is visible, but has changed position and size
(I've attached a png for both units = pixels and points).

The size of the figure when the units are set to points is 517 × 478.
When the units are pixels the size is 674 × 596.

My screensize is reported to be [1  1  1680  1028]. The actual size is
1680x1050. The minor difference is due to the menu bar of MacOS.




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File Attachments:


-------------------------------------------------------
Date: Fri 02 Sep 2011 12:05:53 PM EDT  Name: pixels.png  Size: 74kB   By:
bpabbott
figure with units = pixels &amp; points on MacOS 10.7
<http://savannah.gnu.org/bugs/download.php?file_id=23930>
-------------------------------------------------------
Date: Fri 02 Sep 2011 12:05:53 PM EDT  Name: points.png  Size: 61kB   By:
bpabbott
figure with units = pixels &amp; points on MacOS 10.7
<http://savannah.gnu.org/bugs/download.php?file_id=23931>

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