1 files changed, 480 insertions, 0 deletions
diff --git a/kmrml/kmrml/mrml_view.cpp b/kmrml/kmrml/mrml_view.cpp
new file mode 100644
index 00000000..71f3c741
--- /dev/null
+++ b/kmrml/kmrml/mrml_view.cpp
@@ -0,0 +1,480 @@
+/* This file is part of the KDE project
+   Copyright (C) 2001,2002 Carsten Pfeiffer <pfeiffer@kde.org>
+
+   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; see the file COPYING.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#include <qdom.h>
+#include <qlabel.h>
+#include <qpainter.h>
+#include <qtimer.h>
+#include <qtooltip.h>
+
+#include <kcursor.h>
+#include <kdatastream.h>
+#include <klocale.h>
+#include <kcombobox.h>
+#include <kmimetype.h>
+#include <kurl.h>
+#include <kurldrag.h>
+
+#include "loader.h"
+#include "mrml_creator.h"
+#include "mrml_view.h"
+
+using namespace KMrml;
+
+MrmlView::MrmlView( QWidget *parent, const char *name )
+    : QScrollView( parent, name )
+{
+    setStaticBackground( true );
+    setResizePolicy( Manual );
+    setHScrollBarMode( AlwaysOff );
+    enableClipper( true ); // ### test this
+
+    m_items.setAutoDelete( true );
+
+    connect( Loader::self(), SIGNAL( finished(const KURL&, const QByteArray&)),
+             SLOT( slotDownloadFinished( const KURL&, const QByteArray& )));
+
+    m_timer = new QTimer( this );
+    connect( m_timer, SIGNAL( timeout() ), SLOT( slotLayout() ));
+
+    // we need a pixmap to be shown when no thumbnail is available for a
+    // query result image
+    QLabel l( i18n( "No thumbnail available" ), 0L );
+    l.setFixedSize( 80, 80 );
+    l.setAlignment( WordBreak | AlignCenter );
+//     l.setFrameStyle( QLabel::Box | QLabel::Plain );
+//     l.setLineWidth( 1 );
+    l.setPaletteBackgroundColor( Qt::white );
+    l.setPaletteForegroundColor( Qt::black );
+    m_unavailablePixmap = QPixmap::grabWidget( &l );
+}
+
+MrmlView::~MrmlView()
+{
+}
+
+MrmlViewItem * MrmlView::addItem( const KURL& url, const KURL& thumbURL,
+                                  const QString& similarity )
+{
+    bool ok;
+    double value = similarity.toDouble( &ok );
+    if ( !ok || value < 0.05 )
+        return 0L;
+
+    return addItem( url, thumbURL, value );
+}
+
+MrmlViewItem * MrmlView::addItem( const KURL& url, const KURL& thumbURL,
+                                  double similarity )
+{
+    if ( !url.isValid() ) {
+        qWarning( "MrmlPart: received malformed URL from query: %s",
+                  url.prettyURL().isNull() ? "(null)" : url.prettyURL().latin1() );
+        return 0L;
+    }
+
+//     qDebug("** url: %s", thumbURL.url().latin1());
+
+    MrmlViewItem *item = new MrmlViewItem( url, thumbURL, similarity, this );
+    QPixmap *pixmap = getPixmap( thumbURL );
+    if ( pixmap )
+        item->setPixmap( *pixmap );
+
+    m_items.append( item );
+
+    m_timer->start( 0, true );
+    return item;
+}
+
+void MrmlView::addRelevanceToQuery( QDomDocument& document,
+                                    QDomElement& parent )
+{
+    QPtrListIterator<MrmlViewItem> it( m_items );
+    for( ; it.current(); ++it ) {
+        it.current()->createRelevanceElement( document, parent );
+    }
+}
+
+void MrmlView::clear()
+{
+    m_items.clear(); // items are deleted and removed from scrollview
+    setContentsPos( 0, 0 );
+}
+
+QPixmap * MrmlView::getPixmap( const KURL& url )
+{
+    QString u = url.url();
+    QPixmap *pix = m_pixmapCache.find( u );
+    if ( pix )
+        return pix;
+
+    if ( url.isLocalFile() ) {
+        QPixmap p;
+        if ( !p.load( url.path() ) )
+             p = m_unavailablePixmap;
+
+        m_pixmapCache.insert( u, p );
+        return m_pixmapCache.find( u );
+    }
+    else { // remote url, download with KIO
+        Loader::self()->requestDownload( url );
+    }
+
+    return 0L;
+}
+
+void MrmlView::slotDownloadFinished( const KURL& url, const QByteArray& data )
+{
+    QPtrListIterator<MrmlViewItem> it( m_items );
+    for( ; it.current(); ++it ) {
+        MrmlViewItem *item = it.current();
+        if ( item->thumbURL() == url )
+        {
+            QPixmap p;
+            if ( data.isEmpty() || !p.loadFromData( data ) )
+                p = m_unavailablePixmap;
+
+            m_pixmapCache.insert( url.url(), p );
+            item->setPixmap( p );
+
+            slotLayout();
+            return;
+        }
+    }
+}
+
+void MrmlView::stopDownloads()
+{
+    Loader *loader = Loader::self();
+    QPtrListIterator<MrmlViewItem> it( m_items );
+    for( ; it.current(); ++it ) {
+        MrmlViewItem *item = it.current();
+        if ( !item->hasRemotePixmap() )
+            loader->removeDownload( item->url() );
+    }
+}
+
+void MrmlView::slotLayout()
+{
+    int itemWidth = 0;
+    QPtrListIterator<MrmlViewItem> it( m_items );
+
+    for ( ; it.current(); ++it ) {
+        itemWidth = QMAX( itemWidth, it.current()->sizeHint().width() );
+    }
+
+    if ( itemWidth == 0 )
+        return;
+
+
+    uint itemsPerRow = visibleWidth() / itemWidth;
+    int margin = (visibleWidth() - (itemsPerRow * itemWidth)) / 2;
+    int rowHeight = 0;
+    uint item = 0;
+    uint y = 5;
+
+    // pointing to the first item of a row
+    QPtrListIterator<MrmlViewItem> rowIt( m_items );
+
+    for ( it.toFirst(); it.current(); ++it ) {
+        if ( item >= itemsPerRow ) {
+            item = 0;
+            y += rowHeight;
+            rowHeight = 0;
+        }
+
+        if ( item == 0 )
+            rowIt = it;
+
+        rowHeight = QMAX( rowHeight, it.current()->sizeHint().height() );
+        addChild( it.current(), margin + item * itemWidth, y );
+        it.current()->show();
+
+        item++;
+
+        // resize all items of the current row so they all have the same size
+        if ( item >= itemsPerRow || it.atLast() )
+        {
+            for ( uint i = 0; (i < itemsPerRow && rowIt.current()); i++ )
+            {
+                rowIt.current()->resize( itemWidth, rowHeight );
+                ++rowIt;
+            }
+        }
+    }
+
+    resizeContents( visibleWidth(), y + rowHeight );
+}
+
+void MrmlView::resizeEvent( QResizeEvent *e )
+{
+    int oldW = visibleWidth();
+    QScrollView::resizeEvent( e );
+
+    if ( visibleWidth() != oldW )
+        slotLayout();
+}
+
+void MrmlView::saveState( QDataStream& stream )
+{
+    stream << m_items.count();
+    QPtrListIterator<MrmlViewItem> it( m_items );
+    for( ; it.current(); ++it ) {
+        stream << *it.current();
+    }
+
+}
+
+void MrmlView::restoreState( QDataStream& stream )
+{
+    stopDownloads();
+    clear();
+
+    int count;
+    stream >> count;
+
+    KURL url, thumbURL;
+    double similarity;
+    Q_UINT32 relevance;
+    MrmlViewItem *item;
+
+
+    for ( int i = 0; i < count; i++ )
+    {
+        stream >> url;
+        stream >> thumbURL;
+        stream >> similarity;
+        stream >> relevance;
+
+        item = addItem( url, thumbURL, similarity );
+        if ( item )
+            item->setRelevance( (MrmlViewItem::Relevance) relevance );
+    }
+}
+
+QDataStream& KMrml::operator<<( QDataStream& stream,
+                                const KMrml::MrmlViewItem& item )
+{
+    return stream << item.url()
+                  << item.thumbURL()
+                  << item.similarity()
+                  << static_cast<Q_UINT32>( item.relevance() );
+}
+
+///////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////
+
+
+MrmlViewItem::MrmlViewItem( const KURL& url, const KURL& thumbURL,
+                            double similarity, MrmlView *view,
+                            const char *name )
+    : QFrame( view->viewport() , name ),
+      m_view( view ),
+      m_url( url ),
+      m_thumbURL( thumbURL ),
+      similarityFullWidth( 120 ), // ###
+      m_hasRemotePixmap( false )
+{
+    if ( m_similarity != -1 )
+        m_similarity = QMAX( 0.0, QMIN( 1.0, similarity ));
+    setFrameStyle( Panel | Sunken );
+    setMouseTracking( true );
+
+    m_combo = new KComboBox( this );
+    QToolTip::add( m_combo, i18n("You can refine queries by giving feedback about the current result and pressing the Search button again.") );
+    m_combo->insertItem( i18n("Relevant"),   Relevant );
+    m_combo->insertItem( i18n("Neutral"),    Neutral );
+    m_combo->insertItem( i18n("Irrelevant"), Irrelevant );
+    m_combo->adjustSize();
+    m_combo->setCurrentItem( Neutral );
+
+    /*
+    if ( similarity > -1 )
+        QToolTip::add( this, QString::fromLatin1("<qt>%1<br>%1</qt>")
+                       .arg( url )
+                       .arg(i18n("Similarity: %1").arg( QString::number(similarity))));
+    else
+        QToolTip::add( this, QString::fromLatin1("<qt>%1</qt>").arg( url ) );
+    */
+
+    setMinimumSize( 130, 130 ); // ###
+}
+
+MrmlViewItem::~MrmlViewItem()
+{
+}
+
+void MrmlViewItem::setPixmap( const QPixmap& pix )
+{
+    if ( !m_url.isLocalFile() )
+        m_hasRemotePixmap = true;
+
+    m_pixmap = pix;
+    adjustSize();
+    update();
+}
+
+void MrmlViewItem::paintEvent( QPaintEvent *e )
+{
+    QFrame::paintEvent( e );
+
+    if ( !m_pixmap.isNull() ) {
+        bitBlt( this, pixmapX(), pixmapY(),
+                &m_pixmap, 0, 0, m_pixmap.width(), m_pixmap.height(),
+                CopyROP );
+    }
+
+    if ( m_similarity >= 0 ) {
+        QPainter p( this );
+        QPen pen( colorGroup().highlight(), 1, QPen::SolidLine );
+        p.setPen( pen );
+        int x = margin;
+        int y = m_combo->y() - similarityHeight - 2;
+        int w = (int) (similarityFullWidth * m_similarity);
+        int h = similarityHeight;
+        p.drawRect( x, y, similarityFullWidth, h );
+        p.fillRect( x, y, w, h, colorGroup().highlight() );
+    }
+}
+
+void MrmlViewItem::resizeEvent( QResizeEvent *e )
+{
+    QFrame::resizeEvent( e );
+
+    int y = height() - m_combo->height() - margin;
+    m_combo->move( width()/2 - m_combo->width()/2, y );
+}
+
+QSize MrmlViewItem::sizeHint() const
+{
+    int w = QMAX( QMAX(minimumHeight(), m_combo->width()), m_pixmap.width() );
+    w += 2 * margin;
+
+    int h = m_pixmap.isNull() ? margin : margin + spacing + m_pixmap.height();
+    h += (m_similarity > -1) ? similarityHeight + spacing : 0;
+    h += m_combo->height() + margin;
+
+    return QSize( w, h );
+}
+
+void MrmlViewItem::mousePressEvent( QMouseEvent *e )
+{
+    QFrame::mousePressEvent( e );
+    pressedPos.setX( 0 );
+    pressedPos.setY( 0 );
+
+
+    if ( e->button() == LeftButton || e->button() == MidButton ) {
+        if ( hitsPixmap( e->pos() ) )
+            pressedPos = e->pos();
+    }
+    else if ( e->button() == RightButton && hitsPixmap( e->pos() ) )
+        emit view()->activated( m_url, e->button() );
+}
+
+void MrmlViewItem::mouseMoveEvent( QMouseEvent *e )
+{
+    if ( hitsPixmap( e->pos() ) ) {
+        if ( !ownCursor() ) { // nice hacklet :)
+            setCursor( KCursor::handCursor() );
+            emit view()->onItem( m_url );
+        }
+    }
+    else {
+        if ( ownCursor() ) {
+            unsetCursor();
+            emit view()->onItem( KURL() );
+        }
+    }
+
+    if ( (e->state() & LeftButton) && !pressedPos.isNull() ) {
+        QPoint dist = e->pos() - pressedPos;
+        if ( dist.manhattanLength() > KGlobalSettings::dndEventDelay() ) {
+            // start drag here
+            KURL::List urls;
+            // ### support multiple files?
+            urls.append( m_url );
+            KURLDrag *drag = new KURLDrag( urls, this );
+            drag->setPixmap( KMimeType::pixmapForURL( m_url ) );
+            drag->drag();
+        }
+    }
+}
+
+void MrmlViewItem::mouseReleaseEvent( QMouseEvent *e )
+{
+    if ( hitsPixmap( e->pos() )) {
+        QPoint dist = e->pos() - pressedPos;
+        if ( dist.manhattanLength() < KGlobalSettings::dndEventDelay() ) {
+            emit view()->activated( m_url, e->button() );
+        }
+    }
+}
+
+bool MrmlViewItem::hitsPixmap( const QPoint& pos ) const
+{
+    if ( m_pixmap.isNull() )
+        return false;
+
+    if ( pos.x() > pixmapX() && pos.x() < pixmapX() + m_pixmap.width() &&
+         pos.y() > pixmapY() && pos.y() < pixmapY() + m_pixmap.height() )
+        return true;
+    return false;
+}
+
+void MrmlViewItem::createRelevanceElement( QDomDocument& document,
+                                           QDomElement& parent )
+{
+    int rel = m_combo->currentItem();
+    if ( rel == Neutral )
+        return;
+
+    MrmlCreator::createRelevanceElement( document, parent, m_url.url(),
+        (rel == Relevant) ? MrmlCreator::Relevant : MrmlCreator::Irrelevant );
+}
+
+MrmlViewItem::Relevance MrmlViewItem::relevance() const
+{
+    return (Relevance) m_combo->currentItem();
+}
+
+void MrmlViewItem::setRelevance( Relevance relevance )
+{
+    m_combo->setCurrentItem( relevance );
+}
+
+///////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////
+
+
+int MrmlViewItemList::compareItems( QPtrCollection::Item item1,
+                                    QPtrCollection::Item item2 )
+{
+    double s1 = (static_cast<MrmlViewItem*>( item1 ))->similarity();
+    double s2 = (static_cast<MrmlViewItem*>( item2 ))->similarity();
+
+    if ( s1 < s2 )
+        return 1;
+    else if ( s1 > s2 )
+        return -1;
+    else
+        return 0;
+}
+
+#include "mrml_view.moc"