[Octave-bug-tracker] [bug #33163] The "extent" property for text objects has incorrect position encoded. Patch attached.

[Daniel Wagenaar]

URL:
  <http://savannah.gnu.org/bugs/?33163>

                 Summary: The "extent" property for text objects has incorrect
position encoded. Patch attached.
                 Project: GNU Octave
            Submitted by: wagenaar
            Submitted on: Tue 26 Apr 2011 04:51:11 AM GMT
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Daniel Wagenaar
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

    _______________________________________________________

Details:

In either gnuplot or fltk, if I create a simple plot, e.g.,

  plot([1:5],[1:5].^2);

annotate it with some text, e.g.,

  t = text(2,7,'Hello world');

and request the extent of that text:

  ext = get(t,'extent')

I get the wrong answer:

  ext =

   0.99078  -0.54777   0.48848   0.94946

instead of

  ext =

   1.99078  6.4522   0.48848   0.94946

As the author of the original "extent" implementation, Michael Goffioul,
points out, this is because the (x,y) coordinates of the extent are based on
the axis range rather than the "position" of the text object.

I am attaching a patch to correct this problem.



    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: Tue 26 Apr 2011 04:51:11 AM GMT  Name: text-extent-patch.txt  Size: 1kB 
 By: wagenaar

<http://savannah.gnu.org/bugs/download.php?file_id=23306>
-------------------------------------------------------
Date: Tue 26 Apr 2011 04:51:11 AM GMT  Name: ChangeLog-entry  Size: 283B   By:
wagenaar

<http://savannah.gnu.org/bugs/download.php?file_id=23307>

    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?33163>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/