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## Copyright (C) 2002-2003 Joao Cardoso.
##
## 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 2 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.
##
## This file is part of plplot_octave.
function p17(fg)
global pl_automatic_replot
t = pl_automatic_replot;
pl_automatic_replot = 0;
if(!exist('imread'))
warning('Example p17 requires imread from octave-forge');
return;
end
title "Click and Drag button 1 to select";
xlabel "Button 2 to restart and button 3 to finish";
ylabel "";
file_pgm = imread (file_in_loadpath ("Chloe.pgm"));
[img, map]= gray2ind (file_pgm, 255);
colormap(map);
plimage (img);
if (!nargin)
[x1, y1, x2, y2] = plrb(1);
% Prevent case where range is zero
if (x1 == x2)
x2 = x1+1;
end
if (y1 == y2)
y2 = y1+1;
end
title "Chloe";
xlabel "";
plimage (img, x1, x2, y1, y2);
endif
pl_automatic_replot = t;
endfunction
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