110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
/*
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* Dillo Widget
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*
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* Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
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* Copyright 2023 Rodrigo Arias Mallo <rodarima@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "dw/core.hh"
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#include "dw/fltkcore.hh"
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using namespace lout::signal;
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using namespace dw::core;
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using namespace dw::fltk;
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void solution1 ()
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{
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FltkPlatform *platform = new FltkPlatform ();
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Layout *layout = new Layout (platform);
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Imgbuf *rootbuf = layout->createImgbuf (Imgbuf::RGB, 100, 100, 1);
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rootbuf->ref (); // Extra reference by the dicache.
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printf ("=== Can be deleted? %s.\n",
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rootbuf->lastReference () ? "Yes" : "No");
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Imgbuf *scaledbuf = rootbuf->getScaledBuf (50, 50);
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printf ("=== Can be deleted? %s.\n",
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rootbuf->lastReference () ? "Yes" : "No");
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rootbuf->unref ();
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printf ("=== Can be deleted? %s.\n",
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rootbuf->lastReference () ? "Yes" : "No");
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scaledbuf->unref ();
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printf ("=== Can be deleted? %s.\n",
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rootbuf->lastReference () ? "Yes" : "No");
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rootbuf->unref (); // Extra reference by the dicache.
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delete layout;
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}
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void solution2 ()
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{
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FltkPlatform *platform = new FltkPlatform ();
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Layout *layout = new Layout (platform);
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Imgbuf *rootbuf = layout->createImgbuf (Imgbuf::RGB, 100, 100, 1);
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rootbuf->setDeleteOnUnref (false);
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printf ("=== Can be deleted? %s.\n",
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!rootbuf->isReferred () ? "Yes" : "No");
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Imgbuf *scaledbuf = rootbuf->getScaledBuf (50, 50);
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printf ("=== Can be deleted? %s.\n",
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!rootbuf->isReferred () ? "Yes" : "No");
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rootbuf->unref ();
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printf ("=== Can be deleted? %s.\n",
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!rootbuf->isReferred () ? "Yes" : "No");
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scaledbuf->unref ();
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printf ("=== Can be deleted? %s.\n",
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!rootbuf->isReferred () ? "Yes" : "No");
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delete rootbuf;
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delete layout;
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}
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class RootbufDeletionReceiver: public ObservedObject::DeletionReceiver
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{
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void deleted (ObservedObject *object);
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};
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void RootbufDeletionReceiver::deleted (ObservedObject *object)
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{
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printf ("=== Is deleted now.\n");
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delete this;
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}
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void solution3 ()
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{
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FltkPlatform *platform = new FltkPlatform ();
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Layout *layout = new Layout (platform);
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Imgbuf *rootbuf = layout->createImgbuf (Imgbuf::RGB, 100, 100, 1);
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rootbuf->connectDeletion (new RootbufDeletionReceiver ());
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Imgbuf *scaledbuf = rootbuf->getScaledBuf (50, 50);
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rootbuf->unref ();
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scaledbuf->unref ();
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delete layout;
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}
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int main (int argc, char **argv)
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{
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printf ("========== SOLUTION 1 ==========\n");
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solution1 ();
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printf ("========== SOLUTION 2 ==========\n");
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solution2 ();
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printf ("========== SOLUTION 3 ==========\n");
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solution3 ();
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return 0;
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}
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