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annotate scripts/plot/util/private/__fltk_ginput__.m @ 19793:0e1f5a750d00

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maint: Periodic merge of gui-release to default.
author John W. Eaton <jwe@octave.org>
date Tue, 20 Jan 2015 10:24:46 -0500
parents 9ef286208da1
children 4197fc428c7d
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d63878346099 maint: Update copyright notices for release.
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1 ## Copyright (C) 2010-2013 Shai Ayal
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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} {[@var{x}, @var{y}, @var{buttons}] =} __fltk_ginput__ (@var{n})
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21 ## Undocumented internal function.
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22 ## @end deftypefn
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23
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24 ## This is ginput.m implementation for fltk.
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25
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26 function [x, y, button] = __fltk_ginput__ (n = -1)
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27
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28 if (isempty (gca))
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29 error ("ginput: must have at least one axes");
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30 endif
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31
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32 x = y = button = [];
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33 ginput_accumulator (0, 0, 0, 0); # initialize accumulator
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34
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35 unwind_protect
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36
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37 orig_buttondownfcn = get (gca, "buttondownfcn");
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38 set (gca, "buttondownfcn", @ginput_buttondownfcn);
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39
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40 orig_ginput_keypressfcn = get (gcf, "keypressfcn");
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41 set (gcf, "keypressfcn", @ginput_keypressfcn);
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42
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43 do
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44 __fltk_check__ ();
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45
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46 ## Release CPU.
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47 sleep (0.01);
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48
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49 [x, y, n0, button] = ginput_accumulator (-1, 0, 0, 0);
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50 until ((n > -1 && n0 >= n) || n0 < 0)
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51
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52 if (n0 > n)
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53 ## More clicks than requested due to double-click or too fast clicking
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54 x = x(1:n);
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55 y = y(1:n);
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56 button = button(1:n);
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57 endif
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58
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59 unwind_protect_cleanup
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60 set (gca, "buttondownfcn", orig_buttondownfcn);
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61 set (gcf, "keypressfcn", orig_ginput_keypressfcn);
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62 end_unwind_protect
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63
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64 endfunction
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65
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66 function [x, y, n, button] = ginput_accumulator (mode, xn, yn, btn)
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67 persistent x y n button;
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68
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69 if (mode == 0)
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70 ## Initialize.
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71 x = y = button = [];
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72 n = 0;
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73 elseif (mode == 1)
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74 ## Append mouse button or key press.
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75 x = [x; xn];
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76 y = [y; yn];
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77 button = [button; btn];
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78 n += 1;
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79 elseif (mode == 2)
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80 ## The end due to Enter.
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81 n = -1;
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82 endif
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83
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84 endfunction
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85
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86 function ginput_buttondownfcn (src, button)
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87 point = get (src, "currentpoint");
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88 ginput_accumulator (1, point(1,1), point(1,2), button);
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89 endfunction
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90
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91 function ginput_keypressfcn (src, evt)
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92 point = get (gca, "currentpoint");
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93 key = evt.Key;
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94 if (key == "return")
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95 ## Enter key stops ginput.
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96 ginput_accumulator (2, NaN, NaN, NaN);
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97 else
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98 ginput_accumulator (1, point(1,1), point(1,2), uint8 (key(1)));
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99 endif
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100 endfunction
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101