mirror of
https://invent.kde.org/graphics/okular
synced 2024-09-19 16:01:41 +00:00
278 lines
8.4 KiB
C++
278 lines
8.4 KiB
C++
/***************************************************************************
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* Copyright (C) 2004 by Albert Astals Cid <tsdgeos@terra.es> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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#include <qtimer.h>
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#include <klocale.h>
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#include <kurl.h>
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#include <kurldrag.h>
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#include <kaction.h>
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#include <kactioncollection.h>
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#include "thumbnaillist.h"
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#include "pixmapwidget.h"
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#include "page.h"
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ThumbnailList::ThumbnailList( QWidget *parent, KPDFDocument *document )
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: QScrollView( parent, "KPDF::Thumbnails", WNoAutoErase | WStaticContents ),
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m_document( document ), m_selected( 0 ), m_delayTimer( 0 )
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{
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// set scrollbars
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setHScrollBarMode( QScrollView::AlwaysOff );
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setVScrollBarMode( QScrollView::AlwaysOn );
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// dealing with large areas so enable clipper
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enableClipper( true );
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// widget setup: can be focused by tab and mouse click (not wheel)
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viewport()->setFocusProxy( this );
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viewport()->setFocusPolicy( StrongFocus );
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viewport()->setPaletteBackgroundColor( Qt::gray );
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setResizePolicy( Manual );
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setAcceptDrops( true );
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setDragAutoScroll( false );
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// set contents background to the 'base' color
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viewport()->setPaletteBackgroundColor( palette().active().base() );
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setFrameStyle( StyledPanel | Raised );
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connect( this, SIGNAL(contentsMoving(int, int)), this, SLOT(slotRequestPixmaps(int, int)) );
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}
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//BEGIN KPDFDocumentObserver inherited methods
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void ThumbnailList::pageSetup( const QValueVector<KPDFPage*> & pages, bool /*documentChanged*/ )
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{
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// delete all the Thumbnails
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QValueVector<ThumbnailWidget *>::iterator thumbIt = m_thumbnails.begin();
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QValueVector<ThumbnailWidget *>::iterator thumbEnd = m_thumbnails.end();
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for ( ; thumbIt != thumbEnd; ++thumbIt )
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delete *thumbIt;
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m_thumbnails.clear();
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m_selected = 0;
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if ( pages.count() < 1 )
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{
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resizeContents( 0, 0 );
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return;
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}
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//FIXME change this quick fix (lines that follows). Check if filtering:
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bool skipCheck = true;
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for ( uint i = 0; i < pages.count(); i++ )
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if ( pages[i]->isHilighted() )
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skipCheck = false;
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// generate Thumbnails for the given set of pages
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ThumbnailWidget *t;
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int width = clipper()->width(),
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totalHeight = 0;
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QValueVector<KPDFPage*>::const_iterator pageIt = pages.begin();
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QValueVector<KPDFPage*>::const_iterator pageEnd = pages.end();
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for (; pageIt != pageEnd ; ++pageIt)
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if ( skipCheck || (*pageIt)->isHilighted() ) {
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t = new ThumbnailWidget( viewport(), *pageIt );
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t->setFocusProxy( this );
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// add to the scrollview
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addChild( t, 0, totalHeight );
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// add to the internal queue
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m_thumbnails.push_back( t );
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// update total height (asking widget its own height)
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t->setZoomFitWidth( width );
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t->resize( t->widthHint(), t->heightHint() );
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totalHeight += t->heightHint() + 4;
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t->show();
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}
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// update scrollview's contents size (sets scrollbars limits)
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resizeContents( width, totalHeight );
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// request for thumbnail generation
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requestPixmaps( 200 );
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}
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void ThumbnailList::pageSetCurrent( int pageNumber, const QRect & /*viewport*/ )
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{
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// deselect previous thumbnail
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if ( m_selected )
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m_selected->setSelected( false );
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m_selected = 0;
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// select next page
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m_vectorIndex = 0;
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QValueVector<ThumbnailWidget *>::iterator thumbIt = m_thumbnails.begin();
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QValueVector<ThumbnailWidget *>::iterator thumbEnd = m_thumbnails.end();
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for (; thumbIt != thumbEnd; ++thumbIt)
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{
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if ( (*thumbIt)->pageNumber() == pageNumber )
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{
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m_selected = *thumbIt;
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m_selected->setSelected( true );
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ensureVisible( 0, childY( m_selected ) + m_selected->height()/2, 0, visibleHeight()/2 );
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//non-centered version: ensureVisible( 0, itemTop + itemHeight/2, 0, itemHeight/2 );
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break;
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}
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m_vectorIndex++;
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}
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}
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void ThumbnailList::notifyPixmapChanged( int pageNumber )
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{
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QValueVector<ThumbnailWidget *>::iterator thumbIt = m_thumbnails.begin(), thumbEnd = m_thumbnails.end();
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for (; thumbIt != thumbEnd; ++thumbIt)
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if ( (*thumbIt)->pageNumber() == pageNumber )
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{
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(*thumbIt)->update();
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break;
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}
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}
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void ThumbnailList::dragEnterEvent( QDragEnterEvent * ev )
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{
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ev->accept();
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}
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void ThumbnailList::dropEvent( QDropEvent * ev )
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{
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KURL::List lst;
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if ( KURLDrag::decode( ev, lst ) )
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emit urlDropped( lst.first() );
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}
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//END KPDFDocumentObserver inherited methods
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//BEGIN widget events
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void ThumbnailList::keyPressEvent( QKeyEvent * keyEvent )
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{
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if ( m_thumbnails.count() < 1 )
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return keyEvent->ignore();
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int nextPage = -1;
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if ( keyEvent->key() == Key_Up )
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{
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if ( !m_selected )
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nextPage = 0;
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else if ( m_vectorIndex > 0 )
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nextPage = m_thumbnails[ m_vectorIndex - 1 ]->pageNumber();
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}
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else if ( keyEvent->key() == Key_Down )
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{
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if ( !m_selected )
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nextPage = 0;
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else if ( m_vectorIndex < (int)m_thumbnails.count() - 1 )
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nextPage = m_thumbnails[ m_vectorIndex + 1 ]->pageNumber();
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}
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else if ( keyEvent->key() == Key_Home )
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nextPage = m_thumbnails[ 0 ]->pageNumber();
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else if ( keyEvent->key() == Key_End )
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nextPage = m_thumbnails[ m_thumbnails.count() - 1 ]->pageNumber();
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if ( nextPage == -1 )
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return keyEvent->ignore();
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keyEvent->accept();
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if ( m_selected )
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m_selected->setSelected( false );
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m_selected = 0;
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m_document->slotSetCurrentPage( nextPage );
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}
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void ThumbnailList::contentsMousePressEvent( QMouseEvent * e )
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{
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if ( e->button() != Qt::LeftButton )
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return;
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int clickY = e->y();
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QValueVector<ThumbnailWidget *>::iterator thumbIt = m_thumbnails.begin();
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QValueVector<ThumbnailWidget *>::iterator thumbEnd = m_thumbnails.end();
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for ( ; thumbIt != thumbEnd; ++thumbIt )
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{
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ThumbnailWidget * t = *thumbIt;
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int childTop = childY(t);
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if ( clickY > childTop && clickY < (childTop + t->height()) )
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{
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m_document->slotSetCurrentPage( t->pageNumber() );
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break;
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}
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}
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}
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void ThumbnailList::viewportResizeEvent( QResizeEvent * e )
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{
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if ( m_thumbnails.count() < 1 || width() < 1 )
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return;
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// if width changed resize all the Thumbnails, reposition them to the
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// right place and recalculate the contents area
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if ( e->size().width() != e->oldSize().width() )
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{
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// runs the timer avoiding a thumbnail regeneration by 'contentsMoving'
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requestPixmaps( 2000 );
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// resize and reposition items
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int totalHeight = 0,
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newWidth = e->size().width();
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QValueVector<ThumbnailWidget *>::iterator thumbIt = m_thumbnails.begin();
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QValueVector<ThumbnailWidget *>::iterator thumbEnd = m_thumbnails.end();
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for ( ; thumbIt != thumbEnd; ++thumbIt )
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{
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ThumbnailWidget *t = *thumbIt;
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moveChild( t, 0, totalHeight );
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t->setZoomFitWidth( newWidth );
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t->resize( t->widthHint(), t->heightHint() );
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totalHeight += t->heightHint() + 4;
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}
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// update scrollview's contents size (sets scrollbars limits)
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resizeContents( newWidth, totalHeight );
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// ensure selected item remains visible
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if ( m_selected )
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ensureVisible( 0, childY( m_selected ) + m_selected->height()/2, 0, visibleHeight()/2 );
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}
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else if ( e->size().height() <= e->oldSize().height() )
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return;
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// update Thumbnails since width has changed or height has increased
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requestPixmaps( 500 );
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}
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//END widget events
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//BEGIN internal SLOTS
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void ThumbnailList::slotRequestPixmaps( int /*newContentsX*/, int newContentsY )
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{
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// if an update is already scheduled or the widget is hidden, don't proceed
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if ( (m_delayTimer && m_delayTimer->isActive()) || !isShown() )
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return;
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int vHeight = visibleHeight(),
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vOffset = newContentsY == -1 ? contentsY() : newContentsY;
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// scroll from the top to the last visible thumbnail
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QValueVector<ThumbnailWidget *>::iterator thumbIt = m_thumbnails.begin();
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QValueVector<ThumbnailWidget *>::iterator thumbEnd = m_thumbnails.end();
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for ( ; thumbIt != thumbEnd; ++thumbIt )
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{
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ThumbnailWidget * t = *thumbIt;
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int top = childY( t ) - vOffset;
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if ( top > vHeight )
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break;
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else if ( top + t->height() > 0 )
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m_document->requestPixmap( THUMBNAILS_ID, t->pageNumber(), t->pixmapWidth(), t->pixmapHeight(), true );
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}
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}
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//END internal SLOTS
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void ThumbnailList::requestPixmaps( int delayMs )
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{
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if ( !m_delayTimer )
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{
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m_delayTimer = new QTimer( this );
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connect( m_delayTimer, SIGNAL( timeout() ), this, SLOT( slotRequestPixmaps() ) );
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}
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m_delayTimer->start( delayMs, true );
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}
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#include "thumbnaillist.moc"
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