## Copyright (C) 2016 Pantxo Diribarne
##
## This program 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.
##
## This program 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 this program. If not, see .
## -*- texinfo -*-
## @deftypefn {Function File} {} impixelinfo (@var{h})
## @deftypefnx {Function File} {} impixelinfo (@var{input1}, @var{input2})
## @deftypefnx {Function File} {@var{retval} =} impixelinfo (@var{input1}, @var{input2})
##
## @seealso{}
## @end deftypefn
## Author: Pantxo Diribarne
## Created: 2016-09-07
function hui = impixelinfo (h = [], h2 = [])
him = [];
if (isempty (h2))
if (isempty (h))
hf = hp = gcf ();
elseif (! ishandle (h))
error ("impixelinfo: H must be a graphics handle")
elseif (isfigure (h))
hf = hp = h;
elseif (ismember (get (h, "type"), {"axes", "uipanel", "image"}))
hf = hp = ancestor (h, "figure");
else
error ("impixelinfo: H must me a handle to a figure, axes, uipanel or image");
endif
him = findobj (hf, "type", "image");
if (isempty (him))
error ("impixelinfo: no image to track")
endif
elseif (isfigure (h))
hf = hp = h;
elseif (strcmp (get (h, "type"), "uipanel"))
hp = h;
hf = ancestor (h, "figure");
else
error ("impixelinfo: H must me a handle to a figure, axes, uipanel or image");
endif
if (isempty (him))
if (ishandle (h2))
if (all (strcmp (get (h2, "type"), "image")))
him = h2;
else
error ("impixelinfo: HIM must be a graphics handle to an image object");
endif
endif
endif
hui = uipanel (hf, "position", [0 0 1 0.05]);
hc = impixelinfoval (hui, him);
set (hc, "units", "normalized", "position", [0 0 1 1]);
set (hf, "windowbuttonmotionfcn", {@motionfcn, hc});
endfunction
function motionfcn (h,d, hc)
hasna = 1;
data = getappdata (h, "__impixelinfodata__");
for ii = 1:numel (data)
[str, hasnan] = data(ii).coordfcn (get (h, "currentpoint"));
if (! hasnan)
break
endif
endfor
set (hc, "string", ["Pixel info: " str])
endfunction