Mercurial > octave
view scripts/plot/util/ishandle.m @ 31212:55415fa6a20f
svgconvert: Use Lossless encoding of images when available (bug #52193)
* acinclude.m4: Check that QPainter::LosslessImageRendering flag is available.
* octave-svgconvert.cc (draw): Use new flag if available.
* print.m (doc): Update word of caution about svgconvert and images.
author | Pantxo Diribarne <pantxo.diribarne@gmail.com> |
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date | Mon, 29 Aug 2022 16:36:34 +0200 |
parents | 83f9f8bda883 |
children | 597f3ee61a48 |
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######################################################################## ## ## Copyright (C) 2017-2022 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{tf} =} ishandle (@var{h}) ## Return true if @var{h} is a handle to a graphics or Java object and false ## otherwise. ## ## @var{h} may also be a matrix of handles in which case a logical array is ## returned that is true where the elements of @var{h} are handles to graphics ## or Java objects and false where they are not. ## ## Programming Note: It is often more useful to test for a specific object ## type. To determine if a handle belongs to a graphics object use ## @code{ishghandle} or @code{isgraphics}. To determine if a handle belongs ## to a Java object use @code{isjava}. ## @seealso{ishghandle, isgraphics, isjava} ## @end deftypefn function tf = ishandle (h) if (nargin < 1) print_usage (); endif tf = ishghandle (h) | isjava (h); endfunction %!test %! hf = figure ("visible", "off"); %! unwind_protect %! assert (ishandle (hf)); %! assert (! ishandle (-hf)); %! ax = gca (); %! l = line (); %! assert (ishandle (ax)); %! assert (! ishandle (-ax)); %! assert (ishandle ([l, -1, ax, hf]), logical ([1, 0, 1, 1])); %! assert (ishandle ([l, -1, ax, hf]'), logical ([1, 0, 1, 1]')); %! unwind_protect_cleanup %! close (hf); %! end_unwind_protect %!assert (ishandle ([-1 0]), [false true]) %!testif HAVE_JAVA; usejava ("jvm") %! jobj = javaObject ("java.lang.Double", 1.0); %! assert (ishandle (jobj)); ## Test input validation %!error <Invalid call> ishandle ()