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########################################################################
##
## Copyright (C) 2016-2024 The Octave Project Developers
##
## See the file COPYRIGHT.md in the top-level directory of this
## distribution or <https://octave.org/copyright/>.
##
## 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
## <https://www.gnu.org/licenses/>.
##
########################################################################
## -*- texinfo -*-
## @deftypefn {} {} compare_plot_demos ()
## @deftypefnx {} {} compare_plot_demos ("toolkits", @{@var{toolkit1}, @var{toolkit2}, @dots{}@})
##
## Use @code{dump_demos} and @code{html_compare_plot_demos} to produce an
## html comparison of the plot demos for each of Octave's graphics toolkits.
##
## An m-file named @file{dump_plots.m} will be created in the current working
## directory. This function will be used to render and save the plot demo
## images.
##
## If they do not already exist, directories for each available graphics
## toolkit are created. Each toolkit's directory will be populated with images
## of each plot demo in the png format.
##
## Finally, an html document named @file{compare_plot_demos.html} is produced.
## This page places each toolkit's images side by side for a convenient
## comparison of the results.
##
## If the property @qcode{"toolkits"} is given then compare only the listed
## toolkits in the cell string. The list may also include the toolkit
## @qcode{"matlab"}.
##
## @end deftypefn
function compare_plot_demos (varargin)
arg.toolkits = available_graphics_toolkits ();
arg.directories = fullfile ("plot", {"appearance", "draw", "util"});
arg.directories(end + 1) = "image";
arg.fmt = "png";
arg.fcn_file = "dump_plot_demos.m";
arg.replace_images = false;
for n = 1:2:numel (varargin)
if (! ischar (varargin{n}))
print_usage ();
else
arg.(varargin{n}) = varargin{n+1};
endif
endfor
if (ischar (arg.toolkits))
arg.toolkits = {arg.toolkits};
elseif (! iscellstr (arg.toolkits))
error ('compare_plot_demos: Invalid value for "toolkits"');
endif
if (ischar (arg.directories))
arg.directories = {arg.directories};
elseif (! iscellstr (arg.directories))
error ('compare_plot_demos: Invalid value for "directory"');
endif
if (! ischar (arg.fmt))
error ('compare_plot_demos: Invalid value for "fmt"');
endif
## Generate arg.fcn_file for rendering/saving the plot demo images
dump_demos (arg.directories, arg.fcn_file, arg.fmt);
[~, fcn_name] = fileparts (arg.fcn_file);
## Generate the plot demo images for each toolkit
cwd = pwd ();
unwind_protect
addpath (pwd);
for n = 1:numel (arg.toolkits)
if (! isfolder (fullfile (cwd, arg.toolkits{n})))
mkdir (arg.toolkits{n});
endif
cd (arg.toolkits{n});
if (arg.replace_images && ! isempty (dir (["*." arg.fmt])))
delete (["*." arg.fmt]);
endif
if (! strcmp (arg.toolkits{n}, "matlab"))
close all;
graphics_toolkit (arg.toolkits{n});
try
eval (fcn_name);
catch
printf ("Error running plot demos for ""%s"" toolkit\n",
arg.toolkits{n});
disp (lasterror);
end_try_catch
endif
cd (cwd);
endfor
unwind_protect_cleanup
rmpath (cwd);
end_unwind_protect
if (! strcmp (arg.toolkits, "matlab"))
## Generate the html comparison of the images
html_compare_plot_demos (arg.toolkits);
else
## We need to run matlab manually before the html page can be created
printf ('\nNow run %s in Matlab.\nAfter this run html_compare_plot_demos,\n', arg.fcn_file);
printf ('for example html_compare_plot_demos ({"fltk", "gnuplot", "matlab"}), to create the html page.\n');
endif
endfunction
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