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########################################################################
##
## Copyright (C) 2020-2025 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 {} {@var{pos} =} getpixelposition (@var{h})
## @deftypefnx {} {@var{pos} =} getpixelposition (@var{h}, @var{rel_to_fig})
## Return the position of a user interface component in pixel units.
##
## The first argument @var{h} must be a handle to a valid graphics object of
## type uibuttongroup, uicontrol, uipanel, uitable, axes, or figure. For other
## object types, the function returns zeros.
##
## By default, the position is returned relative to the object's parent.
## If the second argument @var{rel_to_fig} is logically true, the position
## is computed relative to the enclosing figure object.
##
## The return value @var{pos} is a 4-element vector with values
## @code{[lower_left_X, lower_left_Y, width, height]}.
##
## @seealso{get}
## @end deftypefn
function pos = getpixelposition (h, rel_to_fig = false)
if (nargin < 1)
print_usage ();
endif
if (! (isscalar (h) && ishghandle (h)))
error ("getpixelposition: H must be a scalar graphics handle");
endif
if (! any (strcmp (get (h, "type"),
{"uibuttongroup", "uicontrol", "uitable", "uipanel", ...
"axes", "figure"})))
pos = zeros (1, 4);
return;
endif
pos = __get_position__ (h, "pixels");
if (rel_to_fig && ! isfigure (h))
hpar = get (h, "parent");
while (! isfigure (hpar))
pos(1:2) += __get_position__ (hpar, "pixels")(1:2);
hpar = get (hpar, "parent");
endwhile
endif
endfunction
%!demo
%! clf ();
%! hax = axes ("position", [0.25 0.25 0.5 0.5])
%! pos = getpixelposition (hax);
%! han = annotation ("rectangle");
%! set (han, "units", "pixels", "position", pos, "color", "r")
%!demo
%! hf = clf ();
%! hbg = uibuttongroup (hf, "position", [0.2 0.7 0.2 0.2]);
%! hb1 = uicontrol (hbg, "style", "radiobutton", ...
%! "string", "Choice 1", ...
%! "units", "normalized", ...
%! "position", [0.01 0.5 0.98 0.5]);
%! hb2 = uicontrol (hbg, "style", "radiobutton", ...
%! "string", "Choice 2", ...
%! "units", "normalized", ...
%! "position", [0.01 0 0.98 0.5]);
%! pos = getpixelposition (hbg);
%! han = annotation ("rectangle");
%! set (han, "units", "pixels", "position", pos, "color", "r")
%!test
%! pos = [0 0 400 400];
%! hf = figure ("visible", "off", "menubar", "none", "position", pos);
%! unwind_protect
%! hp = uipanel (hf, "position", [0.5 0.5 0.5 0.5]);
%! hax = axes (hp, "position", [0.5 0.5 0.5 0.5]);
%! assert (getpixelposition (hax), [100 100 100 100], 2);
%! assert (getpixelposition (hax, true), [300 300 100 100], 2);
%! unwind_protect_cleanup
%! close (hf);
%! end_unwind_protect
%!test
%! ## Compatibility: return zeros for root figure
%! assert (getpixelposition (groot), zeros (1, 4));
%!test
%! ## Compatibility: return the same for figures regardless of rel_to_fig
%! hf = figure ("visible", "off");
%! unwind_protect
%! assert (getpixelposition (hf), getpixelposition (hf, true));
%! unwind_protect_cleanup
%! close (hf);
%! end_unwind_protect
## Test input validation
%!error <Invalid call> getpixelposition ()
%!error <H must be a scalar> getpixelposition ([1, 2])
%!error <H must be a .* graphics handle> getpixelposition (-1)
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