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-rw-r--r--kio/kfile/kimagefilepreview.cpp187
1 files changed, 187 insertions, 0 deletions
diff --git a/kio/kfile/kimagefilepreview.cpp b/kio/kfile/kimagefilepreview.cpp
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+++ b/kio/kfile/kimagefilepreview.cpp
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+/*
+ * This file is part of the KDE project
+ * Copyright (C) 2001 Martin R. Jones <mjones@kde.org>
+ * 2001 Carsten Pfeiffer <pfeiffer@kde.org>
+ *
+ * You can Freely distribute this program under the GNU Library General Public
+ * License. See the file "COPYING" for the exact licensing terms.
+ */
+
+#include <qlayout.h>
+#include <qlabel.h>
+#include <qcombobox.h>
+#include <qcheckbox.h>
+#include <qwhatsthis.h>
+#include <qtimer.h>
+
+#include <kapplication.h>
+#include <kconfig.h>
+#include <kglobal.h>
+#include <kiconloader.h>
+#include <kpushbutton.h>
+#include <kstandarddirs.h>
+#include <kdebug.h>
+#include <klocale.h>
+#include <kfiledialog.h>
+#include <kfileitem.h>
+#include <kio/previewjob.h>
+
+#include "kimagefilepreview.h"
+#include "config-kfile.h"
+
+/**** KImageFilePreview ****/
+
+KImageFilePreview::KImageFilePreview( QWidget *parent )
+ : KPreviewWidgetBase( parent ),
+ m_job( 0L )
+{
+ KConfig *config = KGlobal::config();
+ KConfigGroupSaver cs( config, ConfigGroup );
+ autoMode = config->readBoolEntry( "Automatic Preview", true );
+
+ QVBoxLayout *vb = new QVBoxLayout( this, 0, KDialog::spacingHint() );
+
+ imageLabel = new QLabel( this );
+ imageLabel->setFrameStyle( QFrame::NoFrame );
+ imageLabel->setAlignment( Qt::AlignHCenter | Qt::AlignVCenter );
+ imageLabel->setSizePolicy( QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding) );
+ vb->addWidget( imageLabel );
+
+ QHBoxLayout *hb = new QHBoxLayout( 0 );
+ vb->addLayout( hb );
+
+ autoPreview = new QCheckBox( i18n("&Automatic preview"), this );
+ autoPreview->setChecked( autoMode );
+ hb->addWidget( autoPreview );
+ connect( autoPreview, SIGNAL(toggled(bool)), SLOT(toggleAuto(bool)) );
+
+ previewButton = new KPushButton( SmallIconSet("thumbnail"), i18n("&Preview"), this );
+ hb->addWidget( previewButton );
+ connect( previewButton, SIGNAL(clicked()), SLOT(showPreview()) );
+
+ timer = new QTimer( this );
+ connect( timer, SIGNAL(timeout()), SLOT(showPreview()) );
+
+ setSupportedMimeTypes( KIO::PreviewJob::supportedMimeTypes() );
+}
+
+KImageFilePreview::~KImageFilePreview()
+{
+ if ( m_job )
+ m_job->kill();
+
+ KConfig *config = KGlobal::config();
+ KConfigGroupSaver cs( config, ConfigGroup );
+ config->writeEntry( "Automatic Preview", autoPreview->isChecked() );
+}
+
+void KImageFilePreview::showPreview()
+{
+ // Pass a copy since clearPreview() will clear currentURL
+ KURL url = currentURL;
+ showPreview( url, true );
+}
+
+// called via KPreviewWidgetBase interface
+void KImageFilePreview::showPreview( const KURL& url )
+{
+ showPreview( url, false );
+}
+
+void KImageFilePreview::showPreview( const KURL &url, bool force )
+{
+ if ( !url.isValid() ) {
+ clearPreview();
+ return;
+ }
+
+ if ( url != currentURL || force )
+ {
+ clearPreview();
+ currentURL = url;
+
+ if ( autoMode || force )
+ {
+ int w = imageLabel->contentsRect().width() - 4;
+ int h = imageLabel->contentsRect().height() - 4;
+
+ m_job = createJob( url, w, h );
+ if ( force ) // explicitly requested previews shall always be generated!
+ m_job->setIgnoreMaximumSize( true );
+
+ connect( m_job, SIGNAL( result( KIO::Job * )),
+ this, SLOT( slotResult( KIO::Job * )));
+ connect( m_job, SIGNAL( gotPreview( const KFileItem*,
+ const QPixmap& )),
+ SLOT( gotPreview( const KFileItem*, const QPixmap& ) ));
+
+ connect( m_job, SIGNAL( failed( const KFileItem* )),
+ this, SLOT( slotFailed( const KFileItem* ) ));
+ }
+ }
+}
+
+void KImageFilePreview::toggleAuto( bool a )
+{
+ autoMode = a;
+ if ( autoMode )
+ {
+ // Pass a copy since clearPreview() will clear currentURL
+ KURL url = currentURL;
+ showPreview( url, true );
+ }
+}
+
+void KImageFilePreview::resizeEvent( QResizeEvent * )
+{
+ timer->start( 100, true ); // forces a new preview
+}
+
+QSize KImageFilePreview::sizeHint() const
+{
+ return QSize( 20, 200 ); // otherwise it ends up huge???
+}
+
+KIO::PreviewJob * KImageFilePreview::createJob( const KURL& url, int w, int h )
+{
+ KURL::List urls;
+ urls.append( url );
+ return KIO::filePreview( urls, w, h, 0, 0, true, false );
+}
+
+void KImageFilePreview::gotPreview( const KFileItem* item, const QPixmap& pm )
+{
+ if ( item->url() == currentURL ) // should always be the case
+ imageLabel->setPixmap( pm );
+}
+
+void KImageFilePreview::slotFailed( const KFileItem* item )
+{
+ if ( item->isDir() )
+ imageLabel->clear();
+ else if ( item->url() == currentURL ) // should always be the case
+ imageLabel->setPixmap( SmallIcon( "file_broken", KIcon::SizeLarge,
+ KIcon::DisabledState ));
+}
+
+void KImageFilePreview::slotResult( KIO::Job *job )
+{
+ if ( job == m_job )
+ m_job = 0L;
+}
+
+void KImageFilePreview::clearPreview()
+{
+ if ( m_job ) {
+ m_job->kill();
+ m_job = 0L;
+ }
+
+ imageLabel->clear();
+ currentURL = KURL();
+}
+
+void KImageFilePreview::virtual_hook( int id, void* data )
+{ KPreviewWidgetBase::virtual_hook( id, data ); }
+
+#include "kimagefilepreview.moc"