update packages

[CreaPhase.git] / octave_packages / m / plot / private / __actual_axis_position__.m

diff --git a/octave_packages/m/plot/private/__actual_axis_position__.m b/octave_packages/m/plot/private/__actual_axis_position__.m
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+++ b/octave_packages/m/plot/private/__actual_axis_position__.m
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+## Copyright (C) 2009-2012 Ben Abbott
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn  {Function File} {} __actual_axis_position__ (@var{h})
+## @deftypefnx {Function File} {} __actual_axis_position__ (@var{axis_struct})
+## Undocumented internal function.
+## @end deftypefn
+
+## Author: Ben Abbott
+
+function pos = __actual_axis_position__ (h)
+
+  if (ishandle (h))
+    axis_obj = get (h);
+  elseif (isstruct (h))
+    axis_obj = h;
+    h = axis_obj.__my_handle__;
+  endif
+
+  ## Get figure size in pixels
+  orig_fig_units = get (axis_obj.parent, "units");
+  orig_fig_position = get (axis_obj.parent, "position");
+  unwind_protect
+    set (axis_obj.parent, "units", "pixels");
+    fig_position = get (axis_obj.parent, "position");
+  unwind_protect_cleanup
+    set (axis_obj.parent, "units", orig_fig_units);
+    set (axis_obj.parent, "position", orig_fig_position);
+  end_unwind_protect
+  ## Get axes size in pixels
+  if (strcmp (get (axis_obj.parent, "__graphics_toolkit__"), "gnuplot")
+      && strcmp (axis_obj.activepositionproperty, "outerposition"))
+    pos_in_pixels = axis_obj.outerposition .* fig_position([3, 4, 3, 4]);
+  else
+    pos_in_pixels = axis_obj.position .* fig_position([3, 4, 3, 4]);
+  endif
+
+  nd = __calc_dimensions__ (h);
+
+  if (strcmp (axis_obj.plotboxaspectratiomode, "manual")
+      || strcmp (axis_obj.dataaspectratiomode, "manual"))
+    ## When using {rltb}margin, Gnuplot does not handle the specified
+    ## aspect ratio properly, so handle it here.
+    if (nd == 2 || all (mod (axis_obj.view, 90) == 0))
+      aspect_ratio_2d = axis_obj.plotboxaspectratio(1:2);
+    else
+      ## FIXME -- this works for "axis square", but has not been
+      ##          thoroughly tested for other aspect ratios.
+      aspect_ratio_2d = [max(axis_obj.plotboxaspectratio(1:2)), ...
+                             axis_obj.plotboxaspectratio(3)/sqrt(2)];
+    endif
+    orig_aspect_ratio_2d = pos_in_pixels(3:4);
+    rel_aspect_ratio_2d =  aspect_ratio_2d ./ orig_aspect_ratio_2d;
+    rel_aspect_ratio_2d = rel_aspect_ratio_2d ./ max (rel_aspect_ratio_2d);
+    if (rel_aspect_ratio_2d(1) < rel_aspect_ratio_2d(2));
+      dx = (1.0 - rel_aspect_ratio_2d(1)) * pos_in_pixels(3);
+      pos_in_pixels = pos_in_pixels + dx*[0.5, 0.0, -1.0, 0.0];
+    elseif (rel_aspect_ratio_2d(1) > rel_aspect_ratio_2d(2))
+      dy = (1.0 - rel_aspect_ratio_2d(2)) * pos_in_pixels(4);
+      pos_in_pixels = pos_in_pixels + dy*[0.0, 0.5, 0.0, -1.0];
+    endif
+    pos = pos_in_pixels ./ fig_position([3, 4, 3, 4]);
+  elseif (strcmp (get (axis_obj.parent, "__graphics_toolkit__"), "gnuplot")
+          && strcmp (axis_obj.activepositionproperty, "outerposition"))
+    pos = axis_obj.outerposition;
+  else
+    pos = axis_obj.position;
+  endif
+endfunction
+