1 files changed, 187 insertions, 0 deletions
diff --git a/tdeio/tdefile/kimagefilepreview.cpp b/tdeio/tdefile/kimagefilepreview.cpp
new file mode 100644
index 000000000..f499f4580
--- /dev/null
+++ b/tdeio/tdefile/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 <tqlayout.h>
+#include <tqlabel.h>
+#include <tqcombobox.h>
+#include <tqcheckbox.h>
+#include <tqwhatsthis.h>
+#include <tqtimer.h>
+
+#include <kapplication.h>
+#include <tdeconfig.h>
+#include <kglobal.h>
+#include <kiconloader.h>
+#include <kpushbutton.h>
+#include <kstandarddirs.h>
+#include <kdebug.h>
+#include <klocale.h>
+#include <tdefiledialog.h>
+#include <tdefileitem.h>
+#include <tdeio/previewjob.h>
+
+#include "kimagefilepreview.h"
+#include "config-tdefile.h"
+
+/**** KImageFilePreview ****/
+
+KImageFilePreview::KImageFilePreview( TQWidget *parent )
+    : KPreviewWidgetBase( parent ),
+      m_job( 0L )
+{
+    TDEConfig *config = TDEGlobal::config();
+    TDEConfigGroupSaver cs( config, ConfigGroup );
+    autoMode = config->readBoolEntry( "Automatic Preview", true );
+
+    TQVBoxLayout *vb = new TQVBoxLayout( this, 0, KDialog::spacingHint() );
+
+    imageLabel = new TQLabel( this );
+    imageLabel->setFrameStyle( TQFrame::NoFrame );
+    imageLabel->setAlignment( Qt::AlignHCenter | Qt::AlignVCenter );
+    imageLabel->setSizePolicy( TQSizePolicy( TQSizePolicy::Expanding, TQSizePolicy::Expanding) );
+    vb->addWidget( imageLabel );
+
+    TQHBoxLayout *hb = new TQHBoxLayout( 0 );
+    vb->addLayout( hb );
+
+    autoPreview = new TQCheckBox( i18n("&Automatic preview"), this );
+    autoPreview->setChecked( autoMode );
+    hb->addWidget( autoPreview );
+    connect( autoPreview, TQT_SIGNAL(toggled(bool)), TQT_SLOT(toggleAuto(bool)) );
+
+    previewButton = new KPushButton( SmallIconSet("thumbnail"), i18n("&Preview"), this );
+    hb->addWidget( previewButton );
+    connect( previewButton, TQT_SIGNAL(clicked()), TQT_SLOT(showPreview()) );
+
+    timer = new TQTimer( this );
+    connect( timer, TQT_SIGNAL(timeout()), TQT_SLOT(showPreview()) );
+
+    setSupportedMimeTypes( TDEIO::PreviewJob::supportedMimeTypes() );
+}
+
+KImageFilePreview::~KImageFilePreview()
+{
+    if ( m_job )
+        m_job->kill();
+
+    TDEConfig *config = TDEGlobal::config();
+    TDEConfigGroupSaver 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, TQT_SIGNAL( result( TDEIO::Job * )),
+                     this, TQT_SLOT( slotResult( TDEIO::Job * )));
+            connect( m_job, TQT_SIGNAL( gotPreview( const KFileItem*,
+                                                const TQPixmap& )),
+                     TQT_SLOT( gotPreview( const KFileItem*, const TQPixmap& ) ));
+
+            connect( m_job, TQT_SIGNAL( failed( const KFileItem* )),
+                     this, TQT_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( TQResizeEvent * )
+{
+    timer->start( 100, true ); // forces a new preview
+}
+
+TQSize KImageFilePreview::sizeHint() const
+{
+    return TQSize( 20, 200 ); // otherwise it ends up huge???
+}
+
+TDEIO::PreviewJob * KImageFilePreview::createJob( const KURL& url, int w, int h )
+{
+    KURL::List urls;
+    urls.append( url );
+    return TDEIO::filePreview( urls, w, h, 0, 0, true, false );
+}
+
+void KImageFilePreview::gotPreview( const KFileItem* item, const TQPixmap& 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( TDEIO::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"