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########################################################################
##
## Copyright (C) 2005-2024 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 {} {} __gnuplot_draw_figure__ (@var{h}, @var{plot_stream}, @var{enhanced})
## Undocumented internal function.
## @end deftypefn
function __gnuplot_draw_figure__ (h, plot_stream, enhanced)
htype = get (h, "type");
if (strcmp (htype, "figure"))
## Get complete list of children.
kids = allchild (h);
nkids = length (kids);
if (nkids > 0)
fputs (plot_stream, "\nreset;\n");
fputs (plot_stream, "set autoscale keepfix;\n");
fputs (plot_stream, "set origin 0, 0\n");
fputs (plot_stream, "set size 1, 1\n");
bg = get (h, "color");
if (isnumeric (bg))
fprintf (plot_stream, ['if (GPVAL_TERM eq "qt") set obj 1 rectangle from screen 0,0 to screen 1,1 behind fc rgb "#%02x%02x%02x" fs solid noborder;' "\n"], round (255 * bg));
bg_is_set = true;
else
bg_is_set = false;
endif
fg_was_set = false;
for i = nkids:-1:1
type = get (kids(i), "type");
switch (type)
case "axes"
if (strcmp (get (kids(i), "tag"), "legend"))
## This is so ugly. If there was a way of getting
## gnuplot to give us the text extents of strings
## then we could get rid of this mess.
lh = getappdata (kids(i), "__axes_handle__");
if (isscalar (lh))
## We have a legend with a single parent. It'll be handled
## below as a gnuplot key to the axis it corresponds to.
continue;
else
ca = lh(1);
## Rely upon listener to convert axes position
## to "normalized" units.
legend_axes_units = get (kids(i), "units");
legend_axes_position = get (kids(i), "position");
legend_axes_outerposition = get (kids(i), "outerposition");
legend_axes_box = get (kids(i), "box");
legend_axes_ylim = get (kids(i), "ylim");
orig_axes_units = get (ca, "units");
hlgnd = get (kids(i));
unwind_protect
set (ca, "units", "normalized");
set (kids(i), "units", "normalized", "box", "off",
"ylim", [-2, -1], "position", get (ca(1), "position"),
"outerposition", get (ca(1), "outerposition"));
## Create a new set of lines with the appropriate
## displaynames, etc
toberm = [];
hobj = get (kids(i), "children");
for j = numel (hobj) : -1 : 1
if (! strcmp (get (hobj(j), "type"), "text"))
continue;
endif
displayname = get (hobj(j), "string");
ll = [];
lm = [];
for k = numel (hobj) : -1 : 1
if (! strcmp (get (hobj(k), "type"), "line"))
continue;
endif
if (getappdata (hobj(j), "handle")
!= getappdata (hobj(k), "handle"))
continue;
endif
if (! strcmp (get (hobj(k), "linestyle"), "none"))
ll = hobj(k);
endif
if (! strcmp (get (hobj(k), "marker"), "none"))
lm = hobj(k);
endif
endfor
if (! isempty (ll))
if (! isempty (lm))
toberm = [toberm, line("xdata",[0,0],"ydata",[0,0], "color", get(lm,"color"), "linestyle", get(ll,"linestyle"), "marker", get(lm,"marker"), "markeredgecolor", get(lm,"markeredgecolor"), "markerfacecolor", get(lm,"markerfacecolor"), "markersize", get (lm, "markersize"), "displayname", displayname, "parent", kids(i))];
else
toberm = [toberm, line("xdata",[0,0],"ydata",[0,0], "color", get(ll,"color"), "linestyle", get(ll,"linestyle"), "marker", "none", "displayname", displayname, "parent", kids(i))];
endif
elseif (! isempty (lm))
toberm = [toberm, line("xdata",[0,0],"ydata",[0,0], "color", get(lm,"color"), "linestyle", "none", "marker", get(lm,"marker"), "markeredgecolor", get(lm,"markeredgecolor"), "markerfacecolor", get(lm,"markerfacecolor"), "markersize", get (lm, "markersize"), "displayname", displayname, "parent", kids(i))];
endif
endfor
if (bg_is_set)
fprintf (plot_stream, ['set border linecolor rgb "#%02x%02x%02x"' "\n"], round (255 * (1 - bg)));
endif
__gnuplot_draw_axes__ (kids(i), plot_stream, enhanced,
bg_is_set, false, hlgnd);
unwind_protect_cleanup
## Return axes "units" and "position" back to
## their original values.
set (ca, "units", orig_axes_units);
set (kids(i), "units", legend_axes_units,
"box", legend_axes_box,
"ylim", legend_axes_ylim,
"position", legend_axes_position,
"outerposition", legend_axes_outerposition);
delete (toberm);
bg_is_set = false;
end_unwind_protect
endif
else
## Rely upon listener to convert axes position
## to "normalized" units.
orig_axes_units = get (kids(i), "units");
orig_axes_position = get (kids(i), "position");
unwind_protect
set (kids(i), "units", "normalized");
fg = get (kids(i), "color");
if (isnumeric (fg) && strcmp (get (kids(i), "visible"), "on"))
fprintf (plot_stream, ['set obj 2 rectangle from graph 0,0 to graph 1,1 behind fc rgb "#%02x%02x%02x" fs solid noborder' "\n"], round (255 * fg));
fg_is_set = true;
fg_was_set = true;
elseif (fg_was_set)
fprintf (plot_stream, "unset obj 2\n");
fg_is_set = false;
fg_was_set = false;
else
fg_is_set = false;
endif
if (bg_is_set)
fprintf (plot_stream, ['set border linecolor rgb "#%02x%02x%02x"' "\n"], round (255 * (1 - bg)));
endif
## Find if this axes has an associated legend axes and pass it
## to __gnuplot_draw_axes__
try
hlegend = get (kids(i), "__legend_handle__");
hlegend = get (hlegend);
catch
hlegend = [];
end_try_catch
__gnuplot_draw_axes__ (kids(i), plot_stream, enhanced,
bg_is_set, fg_is_set, hlegend);
unwind_protect_cleanup
## Return axes "units" and "position" back to
## their original values.
set (kids(i), "units", orig_axes_units,
"position", orig_axes_position);
bg_is_set = false;
fg_is_set = false;
end_unwind_protect
endif
case {"uimenu", "uicontextmenu", "uitoolbar"}
## ignore uimenu objects
kids(i) = [];
otherwise
error ("__gnuplot_draw_figure__: unknown object class, %s", type);
endswitch
endfor
if (isempty (kids))
fputs (plot_stream, "\nreset; clear;\n");
fflush (plot_stream);
else
fputs (plot_stream, "\nunset multiplot;\n");
endif
else
fputs (plot_stream, "\nreset; clear;\n");
fflush (plot_stream);
endif
else
error ("__gnuplot_draw_figure__: expecting figure object, found '%s'",
htype);
endif
endfunction
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