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authortpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-02-10 01:02:50 +0000
committertpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-02-10 01:02:50 +0000
commitc66249b79aa9bfa0924494adcd5345b5b1244b0c (patch)
tree19a77c57cc41d8b522554fbde0c36d6f20d7dc7b /src/gvcore/slideshow.cpp
downloadgwenview-c66249b79aa9bfa0924494adcd5345b5b1244b0c.tar.gz
gwenview-c66249b79aa9bfa0924494adcd5345b5b1244b0c.zip
Added old abandoned KDE3 version of gwenview
git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/gwenview@1088034 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'src/gvcore/slideshow.cpp')
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diff --git a/src/gvcore/slideshow.cpp b/src/gvcore/slideshow.cpp
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+// vim: set tabstop=4 shiftwidth=4 noexpandtab
+// kate: indent-mode csands; indent-width 4; replace-tabs-save off; replace-tabs off; replace-trailing-space-save off; space-indent off; tabs-indents on; tab-width 4;
+/*
+Gwenview - A simple image viewer for KDE
+Copyright 2000-2004 Aur�ien G�eau
+
+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 2
+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, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+*/
+
+// STL
+#include <algorithm>
+
+// Qt
+#include <qtimer.h>
+
+// KDE
+#include <kconfig.h>
+#include <kdebug.h>
+
+// Local
+#include <../gvcore/slideshowconfig.h>
+#include "slideshow.moc"
+
+#include "document.h"
+#include "imageloader.h"
+#include "cache.h"
+
+namespace Gwenview {
+
+#undef ENABLE_LOG
+#undef LOG
+//#define ENABLE_LOG
+#ifdef ENABLE_LOG
+#define LOG(x) kdDebug() << k_funcinfo << x << endl
+#else
+#define LOG(x) ;
+#endif
+
+SlideShow::SlideShow(Document* document)
+: mDocument(document), mStarted(false), mPrefetch( NULL ) {
+ mTimer=new QTimer(this);
+ connect(mTimer, SIGNAL(timeout()),
+ this, SLOT(slotTimeout()) );
+ connect(mDocument, SIGNAL(loaded(const KURL&)),
+ this, SLOT(slotLoaded()) );
+}
+
+SlideShow::~SlideShow() {
+ if( !mPriorityURL.isEmpty()) Cache::instance()->setPriorityURL( mPriorityURL, false );
+}
+
+
+void SlideShow::slotSettingsChanged() {
+ if (mTimer->isActive()) {
+ mTimer->changeInterval(timerInterval());
+ }
+}
+
+
+int SlideShow::timerInterval() {
+ int documentDuration = mDocument->duration();
+ if (documentDuration != 0) {
+ return documentDuration * 1000;
+ } else {
+ return int(SlideShowConfig::delay()*1000);
+ }
+}
+
+
+void SlideShow::start(const KURL::List& urls) {
+ mURLs.resize(urls.size());
+ qCopy(urls.begin(), urls.end(), mURLs.begin());
+ if (SlideShowConfig::random()) {
+ std::random_shuffle(mURLs.begin(), mURLs.end());
+ }
+
+ mStartIt=qFind(mURLs.begin(), mURLs.end(), mDocument->url());
+ if (mStartIt==mURLs.end()) {
+ kdWarning() << k_funcinfo << "Current URL not found in list, aborting.\n";
+ return;
+ }
+
+ mTimer->start(timerInterval(), true);
+ mStarted=true;
+ prefetch();
+ emit stateChanged(true);
+}
+
+
+void SlideShow::stop() {
+ mTimer->stop();
+ mStarted=false;
+ emit stateChanged(false);
+ if( !mPriorityURL.isEmpty()) {
+ Cache::instance()->setPriorityURL( mPriorityURL, false );
+ mPriorityURL = KURL();
+ }
+}
+
+
+QValueVector<KURL>::ConstIterator SlideShow::findNextURL() const {
+ QValueVector<KURL>::ConstIterator it=qFind(mURLs.begin(), mURLs.end(), mDocument->url());
+ if (it==mURLs.end()) {
+ kdWarning() << k_funcinfo << "Current URL not found in list. This should not happen.\n";
+ return it;
+ }
+
+ ++it;
+ if (SlideShowConfig::loop()) {
+ // Looping, if we reach the end, start again
+ if (it==mURLs.end()) {
+ it = mURLs.begin();
+ }
+ } else {
+ // Not looping, have we reached the end?
+ if ((it==mURLs.end() && SlideShowConfig::stopAtEnd()) || it==mStartIt) {
+ it = mURLs.end();
+ }
+ }
+
+ return it;
+}
+
+
+void SlideShow::slotTimeout() {
+ LOG("");
+ // wait for prefetching to finish
+ if( mPrefetch != NULL ) {
+ LOG("mPrefetch is working");
+ return;
+ }
+
+ QValueVector<KURL>::ConstIterator it=findNextURL();
+ if (it==mURLs.end()) {
+ stop();
+ return;
+ }
+ emit nextURL(*it);
+}
+
+
+void SlideShow::slotLoaded() {
+ if (mStarted) {
+ mTimer->start(timerInterval(), true);
+ prefetch();
+ }
+}
+
+
+void SlideShow::prefetch() {
+ LOG("");
+ QValueVector<KURL>::ConstIterator it=findNextURL();
+ if (it==mURLs.end()) {
+ return;
+ }
+ LOG("url=" << (*it).pathOrURL());
+
+ if( mPrefetch != NULL ) mPrefetch->release( this );
+ // TODO don't use prefetching with disabled optimizations (and add that option ;) )
+ // (and also don't use prefetching in other places if the image won't fit in cache)
+ mPrefetch = ImageLoader::loader( *it, this, BUSY_PRELOADING );
+ if( !mPriorityURL.isEmpty()) Cache::instance()->setPriorityURL( mPriorityURL, false );
+ mPriorityURL = *it;
+ Cache::instance()->setPriorityURL( mPriorityURL, true ); // make sure it will stay in the cache
+ connect( mPrefetch, SIGNAL( urlKindDetermined()), SLOT( slotUrlKindDetermined()));
+ connect( mPrefetch, SIGNAL( imageLoaded( bool )), SLOT( prefetchDone()));
+
+ if (mPrefetch->urlKind()==MimeTypeUtils::KIND_FILE) {
+ // Prefetch is already done, and this is not a raster image
+ prefetchDone();
+ }
+}
+
+void SlideShow::slotUrlKindDetermined() {
+ LOG("");
+ if (!mPrefetch) return;
+
+ LOG("mPrefetch!=0");
+ if (mPrefetch->urlKind()==MimeTypeUtils::KIND_FILE) {
+ LOG("KIND_FILE");
+ // This is not a raster image, imageLoaded will not be emitted
+ prefetchDone();
+ }
+}
+
+
+void SlideShow::prefetchDone() {
+ LOG("");
+ if( mPrefetch != NULL ) {
+ LOG("mPrefetch!=0");
+ // don't call Cache::setPriorityURL( ... , false ) here - it will still take
+ // a short while to reuse the image from the cache
+ mPrefetch->release( this );
+ mPrefetch = NULL;
+ // prefetching completed and delay has already elapsed
+ if( mStarted && !mTimer->isActive()) {
+ LOG("Calling slotTimeout");
+ slotTimeout();
+ }
+ }
+}
+
+
+} // namespace