Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 187 insertions, 0 deletions

diff --git a/kio/kfile/kimagefilepreview.cpp b/kio/kfile/kimagefilepreview.cpp
new file mode 100644
index 000000000..d973c6e1b
--- /dev/null
+++ b/kio/kfile/kimagefilepreview.cpp
@@ -0,0 +1,187 @@
+/*
+ * 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"