mirror of
https://invent.kde.org/graphics/okular
synced 2024-08-24 18:35:37 +00:00
617 lines
21 KiB
C++
617 lines
21 KiB
C++
/***************************************************************************
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* Copyright (C) 2004 by Enrico Ros <eros.kde@email.it> *
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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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// qt/kde includes
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#include <qtimer.h>
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#include <qimage.h>
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#include <qpainter.h>
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#include <qapplication.h>
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#include <qdesktopwidget.h>
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#include <kcursor.h>
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#include <ktoolbar.h>
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#include <kdebug.h>
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#include <klocale.h>
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#include <kiconloader.h>
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#include <kimageeffect.h>
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// system includes
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#include <stdlib.h>
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// local includes
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#include "presentationwidget.h"
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#include "document.h" // for PRESENTATION_ID
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#include "generator.h"
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#include "page.h"
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#include "settings.h"
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// comment this to disable the top-right progress indicator
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#define ENABLE_PROGRESS_OVERLAY
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// a frame contains a pointer to the page object, its geometry and the
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// transition effect to the next frame
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struct PresentationFrame
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{
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const KPDFPage * page;
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QRect geometry;
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PresentationWidget::TransitionType transType;
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PresentationWidget::TransitionDirection transDir;
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};
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PresentationWidget::PresentationWidget( KPDFDocument * doc )
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: QWidget( 0, "presentationWidget", WDestructiveClose | WStyle_NoBorder |
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WStyle_StaysOnTop | WShowModal ), m_document( doc ), m_frameIndex( -1 )
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{
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// set look and geometry
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setBackgroundMode( Qt::NoBackground );
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QDesktopWidget * d = QApplication::desktop();
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m_width = d->width();
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m_height = d->height();
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// create top toolbar
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m_topBar = new KToolBar( this, "presentationBar" );
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m_topBar->setIconSize( 32 );
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m_topBar->setMovingEnabled( false );
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m_topBar->insertButton( "1leftarrow", 2, SIGNAL( clicked() ), this, SLOT( slotPrevPage() ) );
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m_topBar->insertButton( "1rightarrow", 3, SIGNAL( clicked() ), this, SLOT( slotNextPage() ) );
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m_topBar->insertButton( "exit", 1, SIGNAL( clicked() ), this, SLOT( close() ) );
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m_topBar->setGeometry( 0, 0, m_width, 32 + 10 );
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m_topBar->alignItemRight( 1 );
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m_topBar->hide();
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// change topbar background color
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QPalette p = m_topBar->palette();
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p.setColor( QPalette::Active, QColorGroup::Button, Qt::gray );
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p.setColor( QPalette::Active, QColorGroup::Background, Qt::darkGray );
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m_topBar->setPalette( p );
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// misc stuff
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setMouseTracking( true );
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m_transitionTimer = new QTimer( this );
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connect( m_transitionTimer, SIGNAL( timeout() ), this, SLOT( slotTransitionStep() ) );
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m_overlayHideTimer = new QTimer( this );
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connect( m_overlayHideTimer, SIGNAL( timeout() ), this, SLOT( slotHideOverlay() ) );
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// register this observer in document
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m_document->addObserver( this );
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// show widget and take control
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showFullScreen();
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if ( Settings::slidesShowSummary() )
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generatePage();
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else
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slotNextPage();
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KCursor::setAutoHideCursor( this, true );
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KCursor::setHideCursorDelay( 3000 );
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}
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PresentationWidget::~PresentationWidget()
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{
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// remove this widget from document observer
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m_document->removeObserver( this );
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// delete frames
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QValueVector< PresentationFrame * >::iterator fIt = m_frames.begin(), fEnd = m_frames.end();
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for ( ; fIt != fEnd; ++fIt )
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delete *fIt;
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}
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void PresentationWidget::pageSetup( const QValueVector<KPDFPage*> & pageSet, bool /*changed*/ )
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{
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// delete previous frames (if any (shouldn't be))
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QValueVector< PresentationFrame * >::iterator fIt = m_frames.begin(), fEnd = m_frames.end();
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for ( ; fIt != fEnd; ++fIt )
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delete *fIt;
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if ( !m_frames.isEmpty() )
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kdWarning() << "Frames setup changed while a Presentation is in progress." << endl;
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m_frames.clear();
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// create the new frames
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QValueVector< KPDFPage * >::const_iterator setIt = pageSet.begin(), setEnd = pageSet.end();
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float screenRatio = (float)m_height / (float)m_width;
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for ( ; setIt != setEnd; ++setIt )
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{
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PresentationFrame * frame = new PresentationFrame();
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frame->page = *setIt;
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//TODO get transition from the document
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frame->transType = Settings::slidesGlitterTrans() ? Glitter : NoTrans;
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frame->transDir = Left;
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// calculate frame geometry keeping constant aspect ratio
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float pageRatio = frame->page->ratio();
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int pageWidth = m_width,
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pageHeight = m_height;
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if ( pageRatio > screenRatio )
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pageWidth = (int)( (float)pageHeight / pageRatio );
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else
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pageHeight = (int)( (float)pageWidth * pageRatio );
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frame->geometry.setRect( (m_width - pageWidth) / 2,
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(m_height - pageHeight) / 2,
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pageWidth, pageHeight );
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// add the frame to the vector
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m_frames.push_back( frame );
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}
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// get metadata from the document
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m_metaStrings.clear();
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const DocumentInfo * info = m_document->documentInfo();
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if ( info )
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{
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if ( !info->title.isNull() )
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m_metaStrings += i18n( "Title: %1" ).arg( info->title );
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if ( !info->title.isNull() )
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m_metaStrings += i18n( "Author: %1" ).arg( info->author );
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}
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m_metaStrings += i18n( "Pages: %1" ).arg( m_document->pages() );
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m_metaStrings += i18n( "Click to begin" );
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}
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bool PresentationWidget::canUnloadPixmap( int pageNumber )
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{
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// can unload all pixmaps except for the currently visible one
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return pageNumber != m_frameIndex;
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}
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void PresentationWidget::notifyPixmapChanged( int pageNumber )
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{
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// check if it's the last requested pixmap. if so update the widget.
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if ( pageNumber == m_frameIndex )
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generatePage();
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}
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// <widget events>
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void PresentationWidget::keyPressEvent( QKeyEvent * e )
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{
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if ( e->key() == Key_Left || e->key() == Key_Backspace )
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slotPrevPage();
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else if ( e->key() == Key_Right || e->key() == Key_Space )
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slotNextPage();
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else if ( e->key() == Key_Escape )
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{
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if ( m_topBar->isShown() )
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m_topBar->hide();
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else
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close();
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}
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}
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void PresentationWidget::wheelEvent( QWheelEvent * e )
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{
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// performance note: don't remove the clipping
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int div = e->delta() / 120;
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if ( div > 0 )
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{
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if ( div > 3 )
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div = 3;
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while ( div-- )
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slotNextPage();
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}
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else if ( div < 0 )
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{
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if ( div < -3 )
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div = -3;
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while ( div++ )
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slotPrevPage();
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}
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}
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void PresentationWidget::mousePressEvent( QMouseEvent * e )
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{
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if ( e->button() == Qt::LeftButton )
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slotNextPage();
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else if ( e->button() == Qt::RightButton )
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slotPrevPage();
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}
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void PresentationWidget::mouseMoveEvent( QMouseEvent * e )
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{
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if ( m_topBar->isShown() )
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{
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if ( e->y() > ( m_topBar->height() + 1 ) )
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m_topBar->hide();
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}
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else if ( !e->y() )
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m_topBar->show();
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}
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void PresentationWidget::paintEvent( QPaintEvent * pe )
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{
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// check painting rect consistancy
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QRect r = pe->rect().intersect( geometry() );
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if ( r.isNull() || m_lastRenderedPixmap.isNull() )
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return;
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// blit the pixmap to the screen
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QMemArray<QRect> allRects = pe->region().rects();
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uint numRects = allRects.count();
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for ( uint i = 0; i < numRects; i++ )
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{
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const QRect & r = allRects[i];
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#ifdef ENABLE_PROGRESS_OVERLAY
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if ( Settings::slidesShowProgress() && r.intersects( m_overlayGeometry ) )
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{
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// backbuffer the overlay operation
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QPixmap backPixmap( r.size() );
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QPainter pixPainter( &backPixmap );
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// first draw the background on the backbuffer
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pixPainter.drawPixmap( QPoint(0,0), m_lastRenderedPixmap, r );
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// then blend the overlay (a piece of) over the background
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QRect ovr = m_overlayGeometry.intersect( r );
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pixPainter.drawPixmap( ovr.left() - r.left(), ovr.top() - r.top(),
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m_lastRenderedOverlay, ovr.left() - m_overlayGeometry.left(),
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ovr.top() - m_overlayGeometry.top(), ovr.width(), ovr.height() );
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// finally blit the pixmap to the screen
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pixPainter.end();
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bitBlt( this, r.topLeft(), &backPixmap, backPixmap.rect() );
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} else
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#endif
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// copy the rendered pixmap to the screen
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bitBlt( this, r.topLeft(), &m_lastRenderedPixmap, r );
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}
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}
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// </widget events>
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void PresentationWidget::generatePage()
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{
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if ( m_lastRenderedPixmap.isNull() )
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m_lastRenderedPixmap.resize( m_width, m_height );
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// opens the painter over the pixmap
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QPainter pixmapPainter;
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pixmapPainter.begin( &m_lastRenderedPixmap );
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// generate welcome page
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if ( m_frameIndex == -1 )
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generateIntroPage( pixmapPainter );
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// generate a normal pixmap with extended margin filling
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if ( m_frameIndex >= 0 && m_frameIndex < (int)m_document->pages() )
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generateContentsPage( m_frameIndex, pixmapPainter );
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pixmapPainter.end();
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// generate the top-right corner overlay
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#ifdef ENABLE_PROGRESS_OVERLAY
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if ( Settings::slidesShowProgress() && m_frameIndex != -1 )
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generateOverlay();
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#endif
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// start transition or immediately update viewport
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TransitionType type = m_frameIndex != -1 ? m_frames[ m_frameIndex ]->transType : NoTrans;
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initTransition( type );
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}
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void PresentationWidget::generateIntroPage( QPainter & p )
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{
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// use a vertical gray gradient background
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int blend1 = m_height / 10,
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blend2 = 9 * m_height / 10;
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int baseTint = Qt::gray.red();
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for ( int i = 0; i < m_height; i++ )
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{
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int k = baseTint;
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if ( i < blend1 )
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k -= (int)( baseTint * (i-blend1)*(i-blend1) / (float)(blend1 * blend1) );
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if ( i > blend2 )
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k += (int)( (255-baseTint) * (i-blend2)*(i-blend2) / (float)(blend1 * blend1) );
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p.fillRect( 0, i, m_width, 1, QColor( k, k, k ) );
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}
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// draw kpdf logo in the four corners
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QPixmap logo = DesktopIcon( "kpdf", 64 );
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if ( !logo.isNull() )
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{
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p.drawPixmap( 5, 5, logo );
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p.drawPixmap( m_width - 5 - logo.width(), 5, logo );
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p.drawPixmap( m_width - 5 - logo.width(), m_height - 5 - logo.height(), logo );
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p.drawPixmap( 5, m_height - 5 - logo.height(), logo );
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}
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// draw metadata text (the last line is 'click to begin')
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int strNum = m_metaStrings.count(),
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strHeight = m_height / ( strNum + 4 ),
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fontHeight = 2 * strHeight / 3;
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QFont font( p.font() );
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font.setPixelSize( fontHeight );
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QFontMetrics metrics( font );
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for ( int i = 0; i < strNum; i++ )
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{
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// set a font to fit text width
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float wScale = (float)metrics.boundingRect( m_metaStrings[i] ).width() / (float)m_width;
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QFont f( font );
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if ( wScale > 1.0 )
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f.setPixelSize( (int)( (float)fontHeight / (float)wScale ) );
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p.setFont( f );
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// text shadow
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p.setPen( Qt::darkGray );
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p.drawText( 2, m_height / 4 + strHeight * i + 2, m_width, strHeight,
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AlignHCenter | AlignVCenter, m_metaStrings[i] );
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// text body
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p.setPen( 128 + (127 * i) / strNum );
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p.drawText( 0, m_height / 4 + strHeight * i, m_width, strHeight,
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AlignHCenter | AlignVCenter, m_metaStrings[i] );
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}
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}
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void PresentationWidget::generateContentsPage( int pageNum, QPainter & p )
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{
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PresentationFrame * frame = m_frames[ pageNum ];
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// translate painter and contents rect
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QRect geom( frame->geometry );
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p.translate( geom.left(), geom.top() );
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geom.moveBy( -geom.left(), -geom.top() );
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// draw the page using the shared PagePainter class
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int flags = PagePainter::Accessibility;
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PagePainter::paintPageOnPainter( frame->page, PRESENTATION_ID, flags,
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&p, geom, geom.width(), geom.height() );
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// restore painter
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p.translate( -frame->geometry.left(), -frame->geometry.top() );
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// fill unpainted areas with background color
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QRegion unpainted( QRect( 0, 0, m_width, m_height ) );
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QMemArray<QRect> rects = unpainted.subtract( frame->geometry ).rects();
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for ( uint i = 0; i < rects.count(); i++ )
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{
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const QRect & r = rects[i];
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if ( Settings::slidesShowGrayBack() )
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{
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// use a vertical gray gradient background
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int baseTint = Qt::gray.red(),
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blendLevel = 9 * m_height / 10,
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blendLeft = r.left(),
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blendWidth = r.width();
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float blendDiv = (m_height * m_height) / 100; // use 100 to fade to pure white
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QColor baseColor( baseTint, baseTint, baseTint );
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for ( int i = r.top(); i <= r.bottom(); i++ )
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{
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if ( i <= blendLevel )
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p.fillRect( blendLeft, i, blendWidth, 1, baseColor );
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else
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{
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int k = i - blendLevel;
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k = baseTint + (int)( (255-baseTint) * (k * k) / blendDiv );
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p.fillRect( blendLeft, i, blendWidth, 1, QColor( baseTint, baseTint, k ) );
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}
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}
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}
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else
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{
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// use the black color that 'crops' images on beamers
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p.fillRect( r, Qt::black );
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}
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}
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}
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void PresentationWidget::generateOverlay()
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{
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#ifdef ENABLE_PROGRESS_OVERLAY
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// calculate overlay geometry and resize pixmap if needed
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int side = m_width / 16;
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m_overlayGeometry.setRect( m_width - side, 0, side, side );
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if ( m_lastRenderedOverlay.width() != side )
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m_lastRenderedOverlay.resize( side, side );
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// note: to get a sort of antialiasing, we render the pixmap double sized
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// and the resulting image is smoothly scaled down. So here we open a
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// painter on the double sized pixmap.
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side *= 2;
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QPixmap doublePixmap( side, side );
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doublePixmap.fill( Qt::black );
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QPainter pixmapPainter( &doublePixmap );
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// draw PIE SLICES in blue levels (the levels will then be the alpha component)
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int pages = m_document->pages();
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if ( pages > 36 )
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{ // draw continous slices
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int degrees = (int)( 360 * (float)(m_frameIndex + 1) / (float)pages );
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pixmapPainter.setPen( 0x20 );
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pixmapPainter.setBrush( 0x10 );
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pixmapPainter.drawPie( 2, 2, side - 4, side - 4, 90*16, (360-degrees)*16 );
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pixmapPainter.setBrush( 0xC0 );
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pixmapPainter.drawPie( 2, 2, side - 4, side - 4, 90*16, -degrees*16 );
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}
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else
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{ // draw discrete slices
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float oldCoord = -90;
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for ( int i = 0; i < pages; i++ )
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{
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float newCoord = -90 + 360 * (float)(i + 1) / (float)pages;
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pixmapPainter.setPen( i <= m_frameIndex ? 0x40 : 0x05 );
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pixmapPainter.setBrush( i <= m_frameIndex ? 0xC0 : 0x10 );
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pixmapPainter.drawPie( 2, 2, side - 4, side - 4,
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(int)( -16*(oldCoord + 1) ), (int)( -16*(newCoord - (oldCoord + 2)) ) );
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oldCoord = newCoord;
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}
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}
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int circleOut = side / 4;
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pixmapPainter.setPen( Qt::black );
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pixmapPainter.setBrush( Qt::black );
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pixmapPainter.drawEllipse( circleOut, circleOut, side - 2*circleOut, side - 2*circleOut );
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// draw TEXT using maximum opacity
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QFont f( pixmapPainter.font() );
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f.setPixelSize( side / 4 );
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pixmapPainter.setFont( f );
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pixmapPainter.setPen( 0xFF );
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// use a little offset to prettify output
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pixmapPainter.drawText( 2, 2, side, side, Qt::AlignCenter, QString::number( m_frameIndex + 1 ) );
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// end drawing pixmap and halve image
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pixmapPainter.end();
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side /= 2;
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QImage image( doublePixmap.convertToImage().smoothScale( side, side ) );
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image.setAlphaBuffer( true );
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// generate a monochrome pixmap using grey level as alpha channel
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int pixels = image.width() * image.height();
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unsigned int * data = (unsigned int *)image.bits();
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for( int i = 0; i < pixels; ++i )
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data[i] = qRgba( 0, 0, 0, data[i] & 0xFF ); // base color can be changed here
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m_lastRenderedOverlay.convertFromImage( image );
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// start the autohide timer
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repaint( m_overlayGeometry, false /*clear*/ ); // toggle with next line
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//update( m_overlayGeometry );
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m_overlayHideTimer->start( 1400, true );
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#endif
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}
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void PresentationWidget::slotNextPage()
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{
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if ( m_frameIndex < (int)m_frames.count() - 1 )
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{
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// go to next page
|
|
++m_frameIndex;
|
|
|
|
// check if pixmap exists or else request it
|
|
PresentationFrame * frame = m_frames[ m_frameIndex ];
|
|
int pixW = frame->geometry.width();
|
|
int pixH = frame->geometry.height();
|
|
// if pixmap not inside the KPDFPage we request it and wait for
|
|
// notifyPixmapChanged call or else we proceed to pixmap generation
|
|
if ( !frame->page->hasPixmap( PRESENTATION_ID, pixW, pixH ) )
|
|
{
|
|
QValueList< PixmapRequest * > request;
|
|
request.push_back( new PixmapRequest( PRESENTATION_ID, m_frameIndex, pixW, pixH ) );
|
|
m_document->requestPixmaps( request, false );
|
|
}
|
|
else
|
|
generatePage();
|
|
}
|
|
else if ( m_transitionTimer->isActive() )
|
|
{
|
|
m_transitionTimer->stop();
|
|
update();
|
|
}
|
|
|
|
setFocus();
|
|
}
|
|
|
|
void PresentationWidget::slotPrevPage()
|
|
{
|
|
if ( m_frameIndex > 0 )
|
|
{
|
|
// go to previous page
|
|
--m_frameIndex;
|
|
|
|
// check if pixmap exists or else request it
|
|
PresentationFrame * frame = m_frames[ m_frameIndex ];
|
|
int pixW = frame->geometry.width();
|
|
int pixH = frame->geometry.height();
|
|
// if pixmap not inside the KPDFPage we request it and wait for
|
|
// notifyPixmapChanged call or else we can proceed to pixmap generation
|
|
if ( !frame->page->hasPixmap( PRESENTATION_ID, pixW, pixH ) )
|
|
{
|
|
QValueList< PixmapRequest * > request;
|
|
request.push_back( new PixmapRequest( PRESENTATION_ID, m_frameIndex, pixW, pixH ) );
|
|
m_document->requestPixmaps( request, false );
|
|
}
|
|
else
|
|
generatePage();
|
|
}
|
|
else if ( m_transitionTimer->isActive() )
|
|
{
|
|
m_transitionTimer->stop();
|
|
update();
|
|
}
|
|
}
|
|
|
|
void PresentationWidget::slotHideOverlay()
|
|
{
|
|
QRect geom( m_overlayGeometry );
|
|
m_overlayGeometry.setCoords( 0, 0, -1, -1 );
|
|
update( geom );
|
|
}
|
|
|
|
void PresentationWidget::slotTransitionStep()
|
|
{
|
|
if ( m_transitionRects.empty() )
|
|
return;
|
|
|
|
for ( int i = 0; i < m_transitionMul && !m_transitionRects.empty(); i++ )
|
|
{
|
|
update( m_transitionRects.first() );
|
|
m_transitionRects.pop_front();
|
|
}
|
|
m_transitionTimer->start( m_transitionDelay, true );
|
|
}
|
|
|
|
|
|
/** ONLY the TRANSITIONS GENERATION function from here on **/
|
|
void PresentationWidget::initTransition( TransitionType type )
|
|
{
|
|
m_transitionRects.clear();
|
|
const int gridXstep = 50;
|
|
const int gridYstep = 38;
|
|
switch( type )
|
|
{
|
|
case Glitter: {
|
|
int oldX = 0,
|
|
oldY = 0;
|
|
// create a grid of gridXstep by gridYstep QRects
|
|
for ( int y = 0; y < gridYstep; y++ )
|
|
{
|
|
int newY = (int)( m_height * ((float)(y+1) / (float)gridYstep) );
|
|
for ( int x = 0; x < gridXstep; x++ )
|
|
{
|
|
int newX = (int)( m_width * ((float)(x+1) / (float)gridXstep) );
|
|
m_transitionRects.push_back( QRect( oldX, oldY, newX - oldX, newY - oldY ) );
|
|
oldX = newX;
|
|
}
|
|
oldX = 0;
|
|
oldY = newY;
|
|
}
|
|
// randomize the grid
|
|
int steps = gridXstep * gridYstep;
|
|
for ( int i = 0; i < steps; i++ )
|
|
{
|
|
int n1 = (int)(steps * drand48());
|
|
int n2 = (int)(steps * drand48());
|
|
if ( n1 != n2 )
|
|
{
|
|
//swap items
|
|
QRect r = m_transitionRects[ n2 ];
|
|
m_transitionRects[ n2 ] = m_transitionRects[ n1 ];
|
|
m_transitionRects[ n1 ] = r;
|
|
}
|
|
}
|
|
// set global transition parameters
|
|
m_transitionMul = 40;
|
|
m_transitionDelay = (m_transitionMul * 500) / steps;
|
|
} break;
|
|
|
|
// TODO: implement missing transitions
|
|
case NoTrans:
|
|
case BoxIn:
|
|
case BoxOut:
|
|
case GlitterDir:
|
|
case FuseDir:
|
|
case SplitDir:
|
|
case WipeDir:
|
|
update();
|
|
return;
|
|
}
|
|
|
|
// send the first start to the timer
|
|
m_transitionTimer->start( 0, true );
|
|
}
|
|
|
|
|
|
#include "presentationwidget.moc"
|