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/*
* Dillo Widget
*
* Copyright 2005-2007 Sebastian Geerken <sgeerken@dillo.org>
* Copyright 2023 Rodrigo Arias Mallo <rodarima@gmail.com>
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dw/core.hh"
#include "dw/fltkcore.hh"
using namespace lout::signal;
using namespace dw::core;
using namespace dw::fltk;
void solution1 ()
{
FltkPlatform *platform = new FltkPlatform ();
Layout *layout = new Layout (platform);
Imgbuf *rootbuf = layout->createImgbuf (Imgbuf::RGB, 100, 100, 1);
rootbuf->ref (); // Extra reference by the dicache.
printf ("=== Can be deleted? %s.\n",
rootbuf->lastReference () ? "Yes" : "No");
Imgbuf *scaledbuf = rootbuf->getScaledBuf (50, 50);
printf ("=== Can be deleted? %s.\n",
rootbuf->lastReference () ? "Yes" : "No");
rootbuf->unref ();
printf ("=== Can be deleted? %s.\n",
rootbuf->lastReference () ? "Yes" : "No");
scaledbuf->unref ();
printf ("=== Can be deleted? %s.\n",
rootbuf->lastReference () ? "Yes" : "No");
rootbuf->unref (); // Extra reference by the dicache.
delete layout;
}
void solution2 ()
{
FltkPlatform *platform = new FltkPlatform ();
Layout *layout = new Layout (platform);
Imgbuf *rootbuf = layout->createImgbuf (Imgbuf::RGB, 100, 100, 1);
rootbuf->setDeleteOnUnref (false);
printf ("=== Can be deleted? %s.\n",
!rootbuf->isReferred () ? "Yes" : "No");
Imgbuf *scaledbuf = rootbuf->getScaledBuf (50, 50);
printf ("=== Can be deleted? %s.\n",
!rootbuf->isReferred () ? "Yes" : "No");
rootbuf->unref ();
printf ("=== Can be deleted? %s.\n",
!rootbuf->isReferred () ? "Yes" : "No");
scaledbuf->unref ();
printf ("=== Can be deleted? %s.\n",
!rootbuf->isReferred () ? "Yes" : "No");
delete rootbuf;
delete layout;
}
class RootbufDeletionReceiver: public ObservedObject::DeletionReceiver
{
void deleted (ObservedObject *object);
};
void RootbufDeletionReceiver::deleted (ObservedObject *object)
{
printf ("=== Is deleted now.\n");
delete this;
}
void solution3 ()
{
FltkPlatform *platform = new FltkPlatform ();
Layout *layout = new Layout (platform);
Imgbuf *rootbuf = layout->createImgbuf (Imgbuf::RGB, 100, 100, 1);
rootbuf->connectDeletion (new RootbufDeletionReceiver ());
Imgbuf *scaledbuf = rootbuf->getScaledBuf (50, 50);
rootbuf->unref ();
scaledbuf->unref ();
delete layout;
}
int main (int argc, char **argv)
{
printf ("========== SOLUTION 1 ==========\n");
solution1 ();
printf ("========== SOLUTION 2 ==========\n");
solution2 ();
printf ("========== SOLUTION 3 ==========\n");
solution3 ();
return 0;
}
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