update packages

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

diff --git a/octave_packages/m/plot/private/__fltk_ginput__.m b/octave_packages/m/plot/private/__fltk_ginput__.m
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+## Copyright (C) 2010-2012 Shai Ayal
+##
+## 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} {[@var{x}, @var{y}, @var{buttons}] =} __fltk_ginput__ (@var{f}, @var{n})
+## Undocumented internal function.
+## @end deftypefn
+
+## This is ginput.m implementation for fltk.
+
+## FIXME -- Key presses cannot toggle menu items nor hotkey functionality
+## (grid, autoscale) during ginput!
+
+function [x, y, button] = __fltk_ginput__ (f, n = -1)
+
+  if (isempty (get (f, "currentaxes")))
+    error ("ginput: must have at least one axes");
+  endif
+
+  x = y = button = [];
+  ginput_aggregator (0, 0, 0, 0);
+
+  unwind_protect
+
+    orig_windowbuttondownfcn = get (f, "windowbuttondownfcn");
+    set (f, "windowbuttondownfcn", @ginput_windowbuttondownfcn);
+
+    orig_ginput_keypressfcn = get (f, "keypressfcn");
+    set (f, "keypressfcn", @ginput_keypressfcn);
+
+    while (true)
+      __fltk_redraw__ ();
+
+      ## Release CPU.
+      sleep (0.01);
+
+      [x, y, n0, button] = ginput_aggregator (-1, 0, 0, 0);
+      if (n0 == n || n0 < 0)
+        break;
+      endif
+    endwhile
+
+  unwind_protect_cleanup
+    set (f, "windowbuttondownfcn", orig_windowbuttondownfcn);
+    set (f, "keypressfcn", orig_ginput_keypressfcn);
+  end_unwind_protect
+
+endfunction
+
+function [x, y, n, button] = ginput_aggregator (mode, xn, yn, btn)
+  persistent x y n button;
+
+  if (mode == 0)
+    ## Initialize.
+    x = [];
+    y = [];
+    button = [];
+    n = 0;
+  elseif (mode == 1)
+    ## Accept mouse button or key press.
+    x = [x; xn];
+    y = [y; yn];
+    button = [button; btn];
+    n += 1;
+  elseif (mode == 2)
+    ## The end due to Enter.
+    n = -1;
+ endif
+endfunction
+
+function ginput_windowbuttondownfcn (src, data)
+  point = get (get (src,"currentaxes"), "currentpoint");
+  ## FIXME -- How to get the actual mouse button pressed (1,2,3) into
+  ## "button"?
+  button = 1;
+  ginput_aggregator (1, point(1,1), point(2,1), button);
+endfunction
+
+function ginput_keypressfcn (src, evt)
+  point = get (get (src, "currentaxes"), "currentpoint");
+  ## FIXME -- use evt.Key or evt.Character?
+  key = evt.Key;
+  if (key == 10)
+    ## Enter key.
+    ginput_aggregator (2, point(1,1), point(2,1), key);
+  else
+    ginput_aggregator (1, point(1,1), point(2,1), key);
+  endif
+endfunction
+