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annotate scripts/plot/private/__actual_axis_position__.m @ 11032:c9b0a75b02e8

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Make all regexp in Octave compatible with both POSIX and PCRE.
author Rik <octave@nomad.inbox5.com>
date Tue, 28 Sep 2010 09:25:14 -0700
parents 2ab8cc6dcced
children d9a8a008c116
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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 ##
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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
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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
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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 ## Get figure size in pixels
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37 orig_fig_units = get (axis_obj.parent, "units");
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38 orig_fig_position = get (axis_obj.parent, "position");
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39 unwind_protect
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40 set (axis_obj.parent, "units", "pixels")
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41 fig_position = get (axis_obj.parent, "position");
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42 unwind_protect_cleanup
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43 set (axis_obj.parent, "units", orig_fig_units)
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44 set (axis_obj.parent, "position", orig_fig_position)
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45 end_unwind_protect
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46 ## Get axes size in pixels
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47 if (strcmp (get (axis_obj.parent, "__backend__"), "gnuplot")
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48 && strcmp (axis_obj.activepositionproperty, "outerposition"))
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49 pos_in_pixels = axis_obj.outerposition .* fig_position([3, 4, 3, 4]);
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50 else
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51 pos_in_pixels = axis_obj.position .* fig_position([3, 4, 3, 4]);
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52 endif
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53
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54 nd = __calc_dimensions__ (h);
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55
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56 if (strcmp (axis_obj.plotboxaspectratiomode, "auto")
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57 && strcmp (axis_obj.dataaspectratiomode, "manual")
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58 && strcmp (axis_obj.xlimmode, "manual")
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59 && strcmp (axis_obj.ylimmode, "manual")
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60 && (nd == 2 || all (mod (axis_obj.view, 90) == 0)))
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61 ## Force plotboxaspectrato to a manual value
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62 dx_dy_dz = [diff(axis_obj.xlim), diff(axis_obj.ylim), diff(axis_obj.zlim)];
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63 dx_dy_dz = dx_dy_dz / min (dx_dy_dz(dx_dy_dz>0));
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64 axis_obj.plotboxaspectratiomode = "manual";
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65 axis_obj.plotboxaspectratio = dx_dy_dz ./ axis_obj.dataaspectratio;
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66 endif
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67
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68 if (strcmp (axis_obj.plotboxaspectratiomode, "manual"))
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69 ## When using {rltb}margin, Gnuplot does not handle the specified
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70 ## aspect ratio properly, so handle it here.
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71 if (nd == 2 || all (mod (axis_obj.view, 90) == 0))
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72 aspect_ratio_2d = axis_obj.plotboxaspectratio(1:2);
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73 else
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74 ## FIXME -- this works for "axis square", but has not been
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75 ## thoroughly tested for other aspect ratios.
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76 aspect_ratio_2d = [max(axis_obj.plotboxaspectratio(1:2)), ...
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77 axis_obj.plotboxaspectratio(3)/sqrt(2)];
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78 endif
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79 orig_aspect_ratio_2d = pos_in_pixels(3:4);
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80 rel_aspect_ratio_2d = aspect_ratio_2d ./ orig_aspect_ratio_2d;
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81 rel_aspect_ratio_2d = rel_aspect_ratio_2d ./ max (rel_aspect_ratio_2d);
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82 if (rel_aspect_ratio_2d(1) < rel_aspect_ratio_2d(2));
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83 dx = (1.0 - rel_aspect_ratio_2d(1)) * pos_in_pixels(3);
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84 pos_in_pixels = pos_in_pixels + dx*[0.5, 0.0, -1.0, 0.0];
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85 elseif (rel_aspect_ratio_2d(1) > rel_aspect_ratio_2d(2))
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86 dy = (1.0 - rel_aspect_ratio_2d(2)) * pos_in_pixels(4);
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87 pos_in_pixels = pos_in_pixels + dy*[0.0, 0.5, 0.0, -1.0];
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88 endif
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89 pos = pos_in_pixels ./ fig_position([3, 4, 3, 4]);
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90 elseif (strcmp (get (axis_obj.parent, "__backend__"), "gnuplot")
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91 && strcmp (axis_obj.activepositionproperty, "outerposition"))
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92 pos = axis_obj.outerposition;
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93 else
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94 pos = axis_obj.position;
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95 endif
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96 endfunction
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97