thumbnaillist.cpp.svn-base

okular

//BEGIN widget events 
void ThumbnailList::keyPressEvent( QKeyEvent * keyEvent )
{
    if ( m_thumbnails.count() < 1 )
        return keyEvent->ignore();

    int nextPage = -1;
    if ( keyEvent->key() == Qt::Key_Up )
    {
        if ( !m_selected )
            nextPage = 0;
        else if ( m_vectorIndex > 0 )
            nextPage = m_thumbnails[ m_vectorIndex - 1 ]->pageNumber();
    }
    else if ( keyEvent->key() == Qt::Key_Down )
    {
        if ( !m_selected )
            nextPage = 0;
        else if ( m_vectorIndex < (int)m_thumbnails.count() - 1 )
            nextPage = m_thumbnails[ m_vectorIndex + 1 ]->pageNumber();
    }
    else if ( keyEvent->key() == Qt::Key_PageUp )
        verticalScrollBar()->triggerAction( QScrollBar::SliderPageStepSub );
    else if ( keyEvent->key() == Qt::Key_PageDown )
        verticalScrollBar()->triggerAction( QScrollBar::SliderPageStepAdd );
    else if ( keyEvent->key() == Qt::Key_Home )
        nextPage = m_thumbnails[ 0 ]->pageNumber();
    else if ( keyEvent->key() == Qt::Key_End )
        nextPage = m_thumbnails[ m_thumbnails.count() - 1 ]->pageNumber();

    if ( nextPage == -1 )
        return keyEvent->ignore();

    keyEvent->accept();
    if ( m_selected )
        m_selected->setSelected( false );
    m_selected = 0;
    m_document->setViewportPage( nextPage );
}

bool ThumbnailList::viewportEvent( QEvent * e )
{
    switch ( e->type() )
    {
        case QEvent::Resize:
        {
            viewportResizeEvent( (QResizeEvent*)e );
            break;
        }
        default:
            ;
    }
    return QScrollArea::viewportEvent( e );
}

void ThumbnailList::viewportResizeEvent( QResizeEvent * e )
{
    if ( m_thumbnails.count() < 1 || width() < 1 )
        return;

    // if width changed resize all the Thumbnails, reposition them to the
    // right place and recalculate the contents area
    if ( e->size().width() != e->oldSize().width() )
    {
        // runs the timer avoiding a thumbnail regeneration by 'contentsMoving'
        delayedRequestVisiblePixmaps( 2000 );

        // resize and reposition items
        int newWidth = contentsRect().width() - verticalScrollBar()->width();
        int newHeight = 0;
        QVector<ThumbnailWidget *>::iterator tIt = m_thumbnails.begin(), tEnd = m_thumbnails.end();
        for ( ; tIt != tEnd; ++tIt )
        {
            ThumbnailWidget *t = *tIt;
            t->resizeFitWidth( newWidth );
            newHeight += t->height() + m_pagesLayout->spacing();
        }

        // update scrollview's contents size (sets scrollbars limits)
        newHeight -= m_pagesLayout->spacing();
        m_pagesWidget->resize( newWidth, newHeight );

        // ensure selected item remains visible
        if ( m_selected )
            ensureVisible( 0, m_selected->mapToParent( QPoint( 0, 0 ) ).y() + m_selected->height()/2, 0, viewport()->height()/2 );
    }
    else if ( e->size().height() <= e->oldSize().height() )
        return;

    // invalidate the bookmark overlay
    if ( m_bookmarkOverlay )
    {
        delete m_bookmarkOverlay;
        m_bookmarkOverlay = 0;
    }

    // update Thumbnails since width has changed or height has increased
    delayedRequestVisiblePixmaps( 500 );
}

void ThumbnailList::dragEnterEvent( QDragEnterEvent * ev )
{
    ev->accept();
}

void ThumbnailList::dropEvent( QDropEvent * ev )
{
    if (  KUrl::List::canDecode(  ev->mimeData() ) )
        emit urlDropped( KUrl::List::fromMimeData( ev->mimeData() ).first() );
}
//END widget events

//BEGIN internal SLOTS 
void ThumbnailList::slotRequestVisiblePixmaps( int /*newContentsY*/ )
{
    // if an update is already scheduled or the widget is hidden, don't proceed
    if ( (m_delayTimer && m_delayTimer->isActive()) || isHidden() )
        return;

    // scroll from the top to the last visible thumbnail
    m_visibleThumbnails.clear();
    QLinkedList< PixmapRequest * > requestedPixmaps;
    QVector<ThumbnailWidget *>::iterator tIt = m_thumbnails.begin(), tEnd = m_thumbnails.end();
    for ( ; tIt != tEnd; ++tIt )
    {
        ThumbnailWidget * t = *tIt;
        QRect thumbRect = t->rect().translated( m_pagesWidget->mapToParent( t->pos() ) );
        if ( !thumbRect.intersects( viewport()->rect() ) )
          continue;
        // add ThumbnailWidget to visible list
        m_visibleThumbnails.push_back( t );
        // if pixmap not present add it to requests
        if ( !t->page()->hasPixmap( THUMBNAILS_ID, t->pixmapWidth(), t->pixmapHeight() ) )
        {
            PixmapRequest * p = new PixmapRequest(
                    THUMBNAILS_ID, t->pageNumber(), t->pixmapWidth(), t->pixmapHeight(), THUMBNAILS_PRIO, true );
            requestedPixmaps.push_back( p );
        }
    }

    // actually request pixmaps
    if ( !requestedPixmaps.isEmpty() )
        m_document->requestPixmaps( requestedPixmaps );
}

void ThumbnailList::slotDelayTimeout()
{
    // resize the bookmark overlay
    delete m_bookmarkOverlay;
    int expectedWidth = viewport()->width() / 4;
    if ( expectedWidth > 10 )
        m_bookmarkOverlay = new QPixmap( DesktopIcon( "attach", expectedWidth ) );
    else
        m_bookmarkOverlay = 0;

    // request pixmaps
    slotRequestVisiblePixmaps();
}
//END internal SLOTS

void ThumbnailList::delayedRequestVisiblePixmaps( int delayMs )
{
    if ( !m_delayTimer )
    {
        m_delayTimer = new QTimer( this );
        m_delayTimer->setSingleShot( true );
        connect( m_delayTimer, SIGNAL( timeout() ), this, SLOT( slotDelayTimeout() ) );
    }
    m_delayTimer->start( delayMs );
}


/** ThumbnailWidget implementation **/

ThumbnailWidget::ThumbnailWidget( QWidget * parent, const KPDFPage * kp, ThumbnailList * tl )
    : QWidget( parent ), m_tl( tl ), m_page( kp ),
    m_selected( false ), m_pixmapWidth( 10 ), m_pixmapHeight( 10 )
{
    m_labelNumber = m_page->number() + 1;
    m_labelHeight = QFontMetrics( font() ).height();
}

void ThumbnailWidget::resizeFitWidth( int width )
{
    m_pixmapWidth = width - m_margin;
    m_pixmapHeight = (int)round( m_page->ratio() * (double)m_pixmapWidth );
    resize( width, heightHint() );
}

void ThumbnailWidget::setSelected( bool selected )
{
    // update selected state
    if ( m_selected != selected )
    {
        m_selected = selected;
        update();
    }
}

void ThumbnailWidget::setVisibleRect( const NormalizedRect & rect )
{
    if ( rect == m_visibleRect )
       return;

    m_visibleRect = rect;
    update();
}

QSize ThumbnailWidget::sizeHint() const
{
    return QSize( width(), heightHint() );
}

void ThumbnailWidget::mouseReleaseEvent( QMouseEvent * e )
{
    // don't handle the mouse click, forward it to the thumbnail list
    m_tl->forwardClick( m_page, e->globalPos(), e->button() );
}

void ThumbnailWidget::contextMenuEvent( QContextMenuEvent * e )
{
    // don't handle the mouse click, forward it to the thumbnail list
    m_tl->forwardClick( m_page, e->globalPos(), Qt::RightButton );
}

void ThumbnailWidget::paintEvent( QPaintEvent * e )
{
    int width = m_pixmapWidth + m_margin;
    QRect clipRect = e->rect();
    if ( !clipRect.isValid() )
        return;
    QPainter p( this );
    QPalette pal = palette();

    // draw the bottom label + highlight mark
    QColor fillColor = m_selected ? pal.color( QPalette::Active, QPalette::Highlight ) : pal.color( QPalette::Active, QPalette::Base );
    p.fillRect( clipRect, fillColor );
    p.setPen( m_selected ? pal.color( QPalette::Active, QPalette::HighlightedText ) : pal.color( QPalette::Active, QPalette::Text ) );
    p.drawText( 0, m_pixmapHeight + m_margin, width, m_labelHeight, Qt::AlignCenter, QString::number( m_labelNumber ) );

    // draw page outline and pixmap
    if ( clipRect.top() < m_pixmapHeight + m_margin )
    {
        // if page is bookmarked draw a colored border
        bool isBookmarked = m_page->hasBookmark();
        // draw the inner rect
        p.setPen( isBookmarked ? QColor( 0xFF8000 ) : Qt::black );
        p.drawRect( m_margin/2 - 1, m_margin/2 - 1, m_pixmapWidth + 2, m_pixmapHeight + 2 );
        // draw the clear rect
        p.setPen( isBookmarked ? QColor( 0x804000 ) : pal.color( QPalette::Active, QPalette::Base ) );
        // draw the bottom and right shadow edges
        if ( !isBookmarked )
        {
            int left, right, bottom, top;
            left = m_margin/2 + 1;
            right = m_margin/2 + m_pixmapWidth + 1;
            bottom = m_pixmapHeight + m_margin/2 + 1;
            top = m_margin/2 + 1;
            p.setPen( Qt::gray );
            p.drawLine( left, bottom, right, bottom );
            p.drawLine( right, top, right, bottom );
        }

        // draw the page using the shared PagePainter class
        p.translate( m_margin/2, m_margin/2 );
        clipRect.translate( -m_margin/2, -m_margin/2 );
        clipRect = clipRect.intersect( QRect( 0, 0, m_pixmapWidth, m_pixmapHeight ) );
        if ( clipRect.isValid() )
        {
            int flags = PagePainter::Accessibility | PagePainter::Highlights |
                        PagePainter::Annotations;
            PagePainter::paintPageOnPainter( &p, m_page, THUMBNAILS_ID, flags,
                                             m_pixmapWidth, m_pixmapHeight, clipRect );
        }

        if ( !m_visibleRect.isNull() )
        {
            p.setPen( QPen( QBrush( Qt::red ), 2 ) );
            p.setBrush( Qt::NoBrush );
            p.drawRect( m_visibleRect.geometry( m_pixmapWidth, m_pixmapHeight ) );
        }

        // draw the bookmark overlay on the top-right corner
        const QPixmap * bookmarkPixmap = m_tl->getBookmarkOverlay();
        if ( isBookmarked && bookmarkPixmap )
        {
            int pixW = bookmarkPixmap->width(),
                pixH = bookmarkPixmap->height();
            clipRect = clipRect.intersect( QRect( m_pixmapWidth - pixW, 0, pixW, pixH ) );
            if ( clipRect.isValid() )
                p.drawPixmap( m_pixmapWidth - pixW, -pixH/8, *bookmarkPixmap );
        }
    }
}


/** ThumbnailsController implementation **/

#define FILTERB_ID  1

ThumbnailController::ThumbnailController( QWidget * parent, ThumbnailList * list )
    : QToolBar( parent )
{
    setObjectName( "ThumbsControlBar" );
    // change toolbar appearance
    setIconSize( QSize( 16, 16 ) );
    setMovable( false );
    QSizePolicy sp = sizePolicy();
    sp.setVerticalPolicy( QSizePolicy::Minimum );
    setSizePolicy( sp );

    // insert a togglebutton [show only bookmarked pages]
    //insertSeparator();
    QAction * showBoomarkOnlyAction = addAction(
        KIcon( "bookmark" ), i18n( "Show bookmarked pages only" ) );
    showBoomarkOnlyAction->setCheckable( true );
    connect( showBoomarkOnlyAction, SIGNAL( toggled( bool ) ), list, SLOT( slotFilterBookmarks( bool ) ) );
    showBoomarkOnlyAction->setChecked( KpdfSettings::filterBookmarks() );
    //insertLineSeparator();
}


#include "thumbnaillist.moc"