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annotate scripts/plot/private/__actual_axis_position__.m @ 10920:91ff0d7ee94b

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Don't pass figure handle to __calc_dimensions__.
author Ben Abbott <bpabbott@mac.com>
date Fri, 27 Aug 2010 21:06:04 -0400
parents 888c75785221
children a72d53df4fa6
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ae51d068bbd5 __actual_axis_position__.m: New function to determine position of rendered axes.
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1 ## Copyright (C) 2009 Ben Abbott
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2 ##
ae51d068bbd5 __actual_axis_position__.m: New function to determine position of rendered axes.
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
ae51d068bbd5 __actual_axis_position__.m: New function to determine position of rendered axes.
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} __actual_axis_position__ (@var{h})
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21 ## @deftypefnx {Function File} {} __actual_axis_position__ (@var{axis_struct})
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22 ## Undocumented internal function.
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23 ## @end deftypefn
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24
ae51d068bbd5 __actual_axis_position__.m: New function to determine position of rendered axes.
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25 ## Author: Ben Abbott
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26
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27 function pos = __actual_axis_position__ (h)
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28
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29 if (ishandle (h))
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30 axis_obj = get (h);
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31 elseif (isstruct (h))
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32 axis_obj = h;
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33 h = axis_obj.__my_handle__;
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34 endif
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35
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36 ## When using {rltb}margin, Gnuplot does not handle the specified
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37 ## aspect ratio properly, so handle it here.
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38 if (__calc_dimensions__ (h) == 2
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39 || all (mod (axis_obj.view, 90) == 0))
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40 aspect_ratio_2d = axis_obj.plotboxaspectratio(1:2);
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41 else
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42 ## FIXME -- this works for "axis square", but has not been
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43 ## thoroughly tested for other aspect ratios.
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44 aspect_ratio_2d = [max(axis_obj.plotboxaspectratio(1:2)), ...
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45 axis_obj.plotboxaspectratio(3)/sqrt(2)];
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46 endif
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47 orig_fig_units = get (axis_obj.parent, "units");
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48 orig_fig_position = get (axis_obj.parent, "position");
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49 unwind_protect
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50 set (axis_obj.parent, "units", "pixels")
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51 fig_position = get (axis_obj.parent, "position");
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52 pos_in_pixels = axis_obj.position .* fig_position([3, 4, 3, 4]);
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53 orig_aspect_ratio_2d = pos_in_pixels(3:4);
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54 rel_aspect_ratio_2d = aspect_ratio_2d ./ orig_aspect_ratio_2d;
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55 rel_aspect_ratio_2d = rel_aspect_ratio_2d ./ max (rel_aspect_ratio_2d);
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56 if (rel_aspect_ratio_2d(1) < rel_aspect_ratio_2d(2));
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57 dx = (1.0 - rel_aspect_ratio_2d(1)) * pos_in_pixels(3);
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58 pos_in_pixels = pos_in_pixels + dx*[0.5, 0.0, -1.0, 0.0];
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59 elseif (rel_aspect_ratio_2d(1) > rel_aspect_ratio_2d(2))
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60 dy = (1.0 - rel_aspect_ratio_2d(2)) * pos_in_pixels(4);
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61 pos_in_pixels = pos_in_pixels + dy*[0.0, 0.5, 0.0, -1.0];
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62 endif
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63 pos = pos_in_pixels ./ fig_position([3, 4, 3, 4]);
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64 unwind_protect_cleanup
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65 set (axis_obj.parent, "units", orig_fig_units)
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66 set (axis_obj.parent, "position", orig_fig_position)
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67 end_unwind_protect
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68
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69 endfunction
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70