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okular/ui/presentationwidget.cpp

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/***************************************************************************
* Copyright (C) 2004 by Enrico Ros <eros.kde@email.it> *
* *
* 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. *
***************************************************************************/
// qt/kde includes
#include <qtimer.h>
#include <qimage.h>
#include <qpainter.h>
#include <qtooltip.h>
#include <qapplication.h>
#include <qdesktopwidget.h>
#include <kapplication.h>
#include <kcursor.h>
#include <ktoolbar.h>
#include <klocale.h>
#include <kdebug.h>
#include <kiconloader.h>
#include <kimageeffect.h>
#include <kmessagebox.h>
#include <kwin.h>
// system includes
#include <stdlib.h>
#include <math.h>
// local includes
#include "presentationwidget.h"
#include "pagepainter.h"
#include "core/generator.h"
#include "core/page.h"
#include "core/link.h"
#include "conf/settings.h"
// comment this to disable the top-right progress indicator
#define ENABLE_PROGRESS_OVERLAY
// a frame contains a pointer to the page object, its geometry and the
// transition effect to the next frame
struct PresentationFrame
{
const KPDFPage * page;
QRect geometry;
};
PresentationWidget::PresentationWidget( QWidget * parent, KPDFDocument * doc )
: QDialog( parent, "presentationWidget", true, WDestructiveClose | WStyle_NoBorder),
m_pressedLink( 0 ), m_handCursor( false ), m_document( doc ), m_frameIndex( -1 )
{
// set look and geometry
setBackgroundMode( Qt::NoBackground );
m_width = -1;
// show widget and take control
showFullScreen();
// misc stuff
setMouseTracking( true );
m_transitionTimer = new QTimer( this );
connect( m_transitionTimer, SIGNAL( timeout() ), this, SLOT( slotTransitionStep() ) );
m_overlayHideTimer = new QTimer( this );
connect( m_overlayHideTimer, SIGNAL( timeout() ), this, SLOT( slotHideOverlay() ) );
// handle cursor appearance as specified in configuration
if ( Settings::slidesCursor() == Settings::EnumSlidesCursor::HiddenDelay )
{
KCursor::setAutoHideCursor( this, true );
KCursor::setHideCursorDelay( 3000 );
}
else if ( Settings::slidesCursor() == Settings::EnumSlidesCursor::Hidden )
{
setCursor( KCursor::blankCursor() );
}
}
PresentationWidget::~PresentationWidget()
{
// remove this widget from document observer
m_document->removeObserver( this );
// set a new viewport in document if page number differs
if ( m_frameIndex != -1 && m_frameIndex != m_document->viewport().pageNumber )
m_document->setViewportPage( m_frameIndex/*, PRESENTATION_ID*/ );
// delete frames
QValueVector< PresentationFrame * >::iterator fIt = m_frames.begin(), fEnd = m_frames.end();
for ( ; fIt != fEnd; ++fIt )
delete *fIt;
}
void PresentationWidget::notifySetup( const QValueVector< KPDFPage * > & pageSet, bool /*documentChanged*/ )
{
// delete previous frames (if any (shouldn't be))
QValueVector< PresentationFrame * >::iterator fIt = m_frames.begin(), fEnd = m_frames.end();
for ( ; fIt != fEnd; ++fIt )
delete *fIt;
if ( !m_frames.isEmpty() )
kdWarning() << "Frames setup changed while a Presentation is in progress." << endl;
m_frames.clear();
// create the new frames
QValueVector< KPDFPage * >::const_iterator setIt = pageSet.begin(), setEnd = pageSet.end();
float screenRatio = (float)m_height / (float)m_width;
for ( ; setIt != setEnd; ++setIt )
{
PresentationFrame * frame = new PresentationFrame();
frame->page = *setIt;
// calculate frame geometry keeping constant aspect ratio
float pageRatio = frame->page->ratio();
int pageWidth = m_width,
pageHeight = m_height;
if ( pageRatio > screenRatio )
pageWidth = (int)( (float)pageHeight / pageRatio );
else
pageHeight = (int)( (float)pageWidth * pageRatio );
frame->geometry.setRect( (m_width - pageWidth) / 2,
(m_height - pageHeight) / 2,
pageWidth, pageHeight );
// add the frame to the vector
m_frames.push_back( frame );
}
// get metadata from the document
m_metaStrings.clear();
const DocumentInfo * info = m_document->documentInfo();
if ( info )
{
if ( !info->get( "title" ).isNull() )
m_metaStrings += i18n( "Title: %1" ).arg( info->get( "title" ) );
if ( !info->get( "author" ).isNull() )
m_metaStrings += i18n( "Author: %1" ).arg( info->get( "author" ) );
}
m_metaStrings += i18n( "Pages: %1" ).arg( m_document->pages() );
m_metaStrings += i18n( "Click to begin" );
}
void PresentationWidget::notifyViewportChanged( bool /*smoothMove*/ )
{
// discard notifications if displaying the summary
if ( m_frameIndex == -1 && Settings::slidesShowSummary() )
return;
// display the current page
changePage( m_document->viewport().pageNumber );
// auto advance to the next page if set
if ( Settings::slidesAdvance() )
QTimer::singleShot( Settings::slidesAdvanceTime() * 1000, this, SLOT( slotNextPage() ) );
}
void PresentationWidget::notifyPageChanged( int pageNumber, int changedFlags )
{
// check if it's the last requested pixmap. if so update the widget.
if ( (changedFlags & DocumentObserver::Pixmap) && pageNumber == m_frameIndex )
generatePage();
}
bool PresentationWidget::canUnloadPixmap( int pageNumber )
{
// can unload all pixmaps except for the currently visible one
return pageNumber != m_frameIndex;
}
// <widget events>
bool PresentationWidget::event ( QEvent * e )
{
if (e -> type() == QEvent::WindowDeactivate) KWin::clearState(winId(), NET::StaysOnTop);
else if (e -> type() == QEvent::WindowActivate) KWin::setState(winId(), NET::StaysOnTop);
return QDialog::event(e);
}
void PresentationWidget::keyPressEvent( QKeyEvent * e )
{
if (m_width == -1) return;
if ( e->key() == Key_Left || e->key() == Key_Backspace || e->key() == Key_Prior )
slotPrevPage();
else if ( e->key() == Key_Right || e->key() == Key_Space || e->key() == Key_Next )
slotNextPage();
else if ( e->key() == Key_Home )
slotFirstPage();
else if ( e->key() == Key_End )
slotLastPage();
else if ( e->key() == Key_Escape )
{
if ( m_topBar->isShown() )
m_topBar->hide();
else
close();
}
}
void PresentationWidget::wheelEvent( QWheelEvent * e )
{
// performance note: don't remove the clipping
int div = e->delta() / 120;
if ( div > 0 )
{
if ( div > 3 )
div = 3;
while ( div-- )
slotPrevPage();
}
else if ( div < 0 )
{
if ( div < -3 )
div = -3;
while ( div++ )
slotNextPage();
}
}
void PresentationWidget::mousePressEvent( QMouseEvent * e )
{
// pressing left button
if ( e->button() == Qt::LeftButton )
{
// if pressing on a link, skip other checks
if ( ( m_pressedLink = getLink( e->x(), e->y() ) ) )
return;
// handle clicking on top-right overlay
if ( m_overlayGeometry.contains( e->pos() ) )
{
overlayClick( e->pos() );
return;
}
// if no other actions, go to next page
slotNextPage();
}
// pressing right button
else if ( e->button() == Qt::RightButton )
slotPrevPage();
}
void PresentationWidget::mouseReleaseEvent( QMouseEvent * e )
{
// if releasing on the same link we pressed over, execute it
if ( m_pressedLink && e->button() == Qt::LeftButton )
{
const KPDFLink * link = getLink( e->x(), e->y() );
if ( link == m_pressedLink )
m_document->processLink( link );
m_pressedLink = 0;
}
}
void PresentationWidget::mouseMoveEvent( QMouseEvent * e )
{
// safety check
if ( m_width == -1 )
return;
// update cursor and tooltip if hovering a link
if ( Settings::slidesCursor() != Settings::EnumSlidesCursor::Hidden )
testCursorOnLink( e->x(), e->y() );
if ( m_topBar->isShown() )
{
// hide a shown bar when exiting the area
if ( e->y() > ( m_topBar->height() + 1 ) )
m_topBar->hide();
}
else
{
// show the bar if reaching top 2 pixels
if ( e->y() <= (geometry().top() + 1) )
m_topBar->show();
// handle "dragging the wheel" if clicking on its geometry
else if ( e->state() == Qt::LeftButton && m_overlayGeometry.contains( e->pos() ) )
overlayClick( e->pos() );
}
}
void PresentationWidget::paintEvent( QPaintEvent * pe )
{
if (m_width == -1)
{
QRect d = KGlobalSettings::desktopGeometry(this);
m_width = d.width();
m_height = d.height();
// create top toolbar
m_topBar = new KToolBar( this, "presentationBar" );
m_topBar->setIconSize( 32 );
m_topBar->setMovingEnabled( false );
m_topBar->insertButton( "1leftarrow", 2, SIGNAL( clicked() ), this, SLOT( slotPrevPage() ) );
m_topBar->insertButton( "1rightarrow", 3, SIGNAL( clicked() ), this, SLOT( slotNextPage() ) );
m_topBar->insertButton( "exit", 1, SIGNAL( clicked() ), this, SLOT( close() ) );
m_topBar->setGeometry( 0, 0, m_width, 32 + 10 );
m_topBar->alignItemRight( 1 );
m_topBar->hide();
// change topbar background color
QPalette p = m_topBar->palette();
p.setColor( QPalette::Active, QColorGroup::Button, Qt::gray );
p.setColor( QPalette::Active, QColorGroup::Background, Qt::darkGray );
m_topBar->setPalette( p );
// register this observer in document. events will come immediately
m_document->addObserver( this );
// show summary if requested
if ( Settings::slidesShowSummary() )
generatePage();
// inform user on how to exit from presentation mode
KMessageBox::information( this, i18n("There are two ways of exiting presentation mode, you can press either ESC key or click with the quit button that appears when placing the mouse in the top-right corner. Of course you can cycle windows (Alt+TAB by default)"), QString::null, "presentationInfo" );
}
// check painting rect consistancy
QRect r = pe->rect().intersect( geometry() );
if ( r.isNull() || m_lastRenderedPixmap.isNull() )
return;
// blit the pixmap to the screen
QMemArray<QRect> allRects = pe->region().rects();
uint numRects = allRects.count();
for ( uint i = 0; i < numRects; i++ )
{
const QRect & r = allRects[i];
if ( !r.isValid() )
continue;
#ifdef ENABLE_PROGRESS_OVERLAY
if ( Settings::slidesShowProgress() && r.intersects( m_overlayGeometry ) )
{
// backbuffer the overlay operation
QPixmap backPixmap( r.size() );
QPainter pixPainter( &backPixmap );
// first draw the background on the backbuffer
pixPainter.drawPixmap( QPoint(0,0), m_lastRenderedPixmap, r );
// then blend the overlay (a piece of) over the background
QRect ovr = m_overlayGeometry.intersect( r );
pixPainter.drawPixmap( ovr.left() - r.left(), ovr.top() - r.top(),
m_lastRenderedOverlay, ovr.left() - m_overlayGeometry.left(),
ovr.top() - m_overlayGeometry.top(), ovr.width(), ovr.height() );
// finally blit the pixmap to the screen
pixPainter.end();
bitBlt( this, r.topLeft(), &backPixmap, backPixmap.rect() );
} else
#endif
// copy the rendered pixmap to the screen
bitBlt( this, r.topLeft(), &m_lastRenderedPixmap, r );
}
}
// </widget events>
const KPDFLink * PresentationWidget::getLink( int x, int y, QRect * geometry ) const
{
// no links on invalid pages
if ( geometry && !geometry->isNull() )
geometry->setRect( 0, 0, -1, -1 );
if ( m_frameIndex < 0 || m_frameIndex >= (int)m_frames.size() )
return 0;
// get frame, page and geometry
const PresentationFrame * frame = m_frames[ m_frameIndex ];
const KPDFPage * page = frame->page;
const QRect & frameGeometry = frame->geometry;
// compute normalized x and y
double nx = (double)(x - frameGeometry.left()) / (double)frameGeometry.width();
double ny = (double)(y - frameGeometry.top()) / (double)frameGeometry.height();
// no links outside the pages
if ( nx < 0 || nx > 1 || ny < 0 || ny > 1 )
return 0;
// check if 1) there is an object and 2) it's a link
const ObjectRect * object = page->getObjectRect( ObjectRect::Link, nx, ny );
if ( !object )
return 0;
// compute link geometry if destination rect present
if ( geometry )
{
*geometry = object->geometry( frameGeometry.width(), frameGeometry.height() );
geometry->moveBy( frameGeometry.left(), frameGeometry.top() );
}
// return the link pointer
return (KPDFLink *)object->pointer();
}
void PresentationWidget::testCursorOnLink( int x, int y )
{
// get rect
QRect linkRect;
const KPDFLink * link = getLink( x, y, &linkRect );
// only react on changes (in/out from a link)
if ( (link && !m_handCursor) || (!link && m_handCursor) )
{
// change cursor shape
m_handCursor = link != 0;
setCursor( m_handCursor ? KCursor::handCursor() : KCursor::arrowCursor() );
// set tooltip over link's rect
QString tip = link ? link->linkTip() : "";
if ( m_handCursor && !tip.isEmpty() )
QToolTip::add( this, linkRect, tip );
}
}
void PresentationWidget::overlayClick( const QPoint & position )
{
// clicking the progress indicator
int xPos = position.x() - m_overlayGeometry.x() - m_overlayGeometry.width() / 2,
yPos = m_overlayGeometry.height() / 2 - position.y();
if ( !xPos && !yPos )
return;
// compute angle relative to indicator (note coord transformation)
float angle = 0.5 + 0.5 * atan2( -xPos, -yPos ) / M_PI;
int pageIndex = (int)( angle * ( m_frames.count() - 1 ) + 0.5 );
// go to selected page
changePage( pageIndex );
}
void PresentationWidget::changePage( int newPage )
{
if ( m_frameIndex == newPage )
return;
// check if pixmap exists or else request it
m_frameIndex = newPage;
PresentationFrame * frame = m_frames[ m_frameIndex ];
int pixW = frame->geometry.width();
int pixH = frame->geometry.height();
int rot = frame->page->rotation();
// 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 ) )
{
// operation will take long: set busy cursor
QApplication::setOverrideCursor( KCursor::workingCursor() );
// request the pixmap
QValueList< PixmapRequest * > request;
request.push_back( new PixmapRequest( PRESENTATION_ID, m_frameIndex, pixW, pixH, rot, PRESENTATION_PRIO ) );
m_document->requestPixmaps( request );
// restore cursor
QApplication::restoreOverrideCursor();
}
else
{
// make the background pixmap
generatePage();
}
}
void PresentationWidget::generatePage()
{
if ( m_lastRenderedPixmap.isNull() )
m_lastRenderedPixmap.resize( m_width, m_height );
// opens the painter over the pixmap
QPainter pixmapPainter;
pixmapPainter.begin( &m_lastRenderedPixmap );
// generate welcome page
if ( m_frameIndex == -1 )
generateIntroPage( pixmapPainter );
// generate a normal pixmap with extended margin filling
if ( m_frameIndex >= 0 && m_frameIndex < (int)m_document->pages() )
generateContentsPage( m_frameIndex, pixmapPainter );
pixmapPainter.end();
// generate the top-right corner overlay
#ifdef ENABLE_PROGRESS_OVERLAY
if ( Settings::slidesShowProgress() && m_frameIndex != -1 )
generateOverlay();
#endif
// start transition on pages that have one
const KPDFPageTransition * transition = m_frameIndex != -1 ?
m_frames[ m_frameIndex ]->page->getTransition() : 0;
if ( transition )
initTransition( transition );
else {
KPDFPageTransition trans = defaultTransition();
initTransition( &trans );
}
// update cursor + tooltip
if ( Settings::slidesCursor() != Settings::EnumSlidesCursor::Hidden )
{
QPoint p = mapFromGlobal( QCursor::pos() );
testCursorOnLink( p.x(), p.y() );
}
}
void PresentationWidget::generateIntroPage( QPainter & p )
{
// use a vertical gray gradient background
int blend1 = m_height / 10,
blend2 = 9 * m_height / 10;
int baseTint = Qt::gray.red();
for ( int i = 0; i < m_height; i++ )
{
int k = baseTint;
if ( i < blend1 )
k -= (int)( baseTint * (i-blend1)*(i-blend1) / (float)(blend1 * blend1) );
if ( i > blend2 )
k += (int)( (255-baseTint) * (i-blend2)*(i-blend2) / (float)(blend1 * blend1) );
p.fillRect( 0, i, m_width, 1, QColor( k, k, k ) );
}
// draw kpdf logo in the four corners
QPixmap logo = DesktopIcon( "kpdf", 64 );
if ( !logo.isNull() )
{
p.drawPixmap( 5, 5, logo );
p.drawPixmap( m_width - 5 - logo.width(), 5, logo );
p.drawPixmap( m_width - 5 - logo.width(), m_height - 5 - logo.height(), logo );
p.drawPixmap( 5, m_height - 5 - logo.height(), logo );
}
// draw metadata text (the last line is 'click to begin')
int strNum = m_metaStrings.count(),
strHeight = m_height / ( strNum + 4 ),
fontHeight = 2 * strHeight / 3;
QFont font( p.font() );
font.setPixelSize( fontHeight );
QFontMetrics metrics( font );
for ( int i = 0; i < strNum; i++ )
{
// set a font to fit text width
float wScale = (float)metrics.boundingRect( m_metaStrings[i] ).width() / (float)m_width;
QFont f( font );
if ( wScale > 1.0 )
f.setPixelSize( (int)( (float)fontHeight / (float)wScale ) );
p.setFont( f );
// text shadow
p.setPen( Qt::darkGray );
p.drawText( 2, m_height / 4 + strHeight * i + 2, m_width, strHeight,
AlignHCenter | AlignVCenter, m_metaStrings[i] );
// text body
p.setPen( 128 + (127 * i) / strNum );
p.drawText( 0, m_height / 4 + strHeight * i, m_width, strHeight,
AlignHCenter | AlignVCenter, m_metaStrings[i] );
}
}
void PresentationWidget::generateContentsPage( int pageNum, QPainter & p )
{
PresentationFrame * frame = m_frames[ pageNum ];
// translate painter and contents rect
QRect geom( frame->geometry );
p.translate( geom.left(), geom.top() );
geom.moveBy( -geom.left(), -geom.top() );
// draw the page using the shared PagePainter class
int flags = PagePainter::Accessibility;
PagePainter::paintPageOnPainter( &p, frame->page, PRESENTATION_ID, flags,
geom.width(), geom.height(), geom );
// restore painter
p.translate( -frame->geometry.left(), -frame->geometry.top() );
// fill unpainted areas with background color
QRegion unpainted( QRect( 0, 0, m_width, m_height ) );
QMemArray<QRect> rects = unpainted.subtract( frame->geometry ).rects();
for ( uint i = 0; i < rects.count(); i++ )
{
const QRect & r = rects[i];
p.fillRect( r, Settings::slidesBackgroundColor() );
}
}
// from Arthur - Qt4 - (is defined elsewhere as 'qt_div_255' to not break final compilation)
inline int qt_div255(int x) { return (x + (x>>8) + 0x80) >> 8; }
void PresentationWidget::generateOverlay()
{
#ifdef ENABLE_PROGRESS_OVERLAY
// calculate overlay geometry and resize pixmap if needed
int side = m_width / 16;
m_overlayGeometry.setRect( m_width - side - 4, 4, side, side );
if ( m_lastRenderedOverlay.width() != side )
m_lastRenderedOverlay.resize( side, side );
// note: to get a sort of antialiasing, we render the pixmap double sized
// and the resulting image is smoothly scaled down. So here we open a
// painter on the double sized pixmap.
side *= 2;
QPixmap doublePixmap( side, side );
doublePixmap.fill( Qt::black );
QPainter pixmapPainter( &doublePixmap );
// draw PIE SLICES in blue levels (the levels will then be the alpha component)
int pages = m_document->pages();
if ( pages > 28 )
{ // draw continuous slices
int degrees = (int)( 360 * (float)(m_frameIndex + 1) / (float)pages );
pixmapPainter.setPen( 0x05 );
pixmapPainter.setBrush( 0x40 );
pixmapPainter.drawPie( 2, 2, side - 4, side - 4, 90*16, (360-degrees)*16 );
pixmapPainter.setPen( 0x40 );
pixmapPainter.setBrush( 0xF0 );
pixmapPainter.drawPie( 2, 2, side - 4, side - 4, 90*16, -degrees*16 );
}
else
{ // draw discrete slices
float oldCoord = -90;
for ( int i = 0; i < pages; i++ )
{
float newCoord = -90 + 360 * (float)(i + 1) / (float)pages;
pixmapPainter.setPen( i <= m_frameIndex ? 0x40 : 0x05 );
pixmapPainter.setBrush( i <= m_frameIndex ? 0xF0 : 0x40 );
pixmapPainter.drawPie( 2, 2, side - 4, side - 4,
(int)( -16*(oldCoord + 1) ), (int)( -16*(newCoord - (oldCoord + 2)) ) );
oldCoord = newCoord;
}
}
int circleOut = side / 4;
pixmapPainter.setPen( Qt::black );
pixmapPainter.setBrush( Qt::black );
pixmapPainter.drawEllipse( circleOut, circleOut, side - 2*circleOut, side - 2*circleOut );
// draw TEXT using maximum opacity
QFont f( pixmapPainter.font() );
f.setPixelSize( side / 4 );
pixmapPainter.setFont( f );
pixmapPainter.setPen( 0xFF );
// use a little offset to prettify output
pixmapPainter.drawText( 2, 2, side, side, Qt::AlignCenter, QString::number( m_frameIndex + 1 ) );
// end drawing pixmap and halve image
pixmapPainter.end();
QImage image( doublePixmap.convertToImage().smoothScale( side / 2, side / 2 ) );
image.setAlphaBuffer( true );
// draw circular shadow using the same technique
doublePixmap.fill( Qt::black );
pixmapPainter.begin( &doublePixmap );
pixmapPainter.setPen( 0x40 );
pixmapPainter.setBrush( 0x80 );
pixmapPainter.drawEllipse( 0, 0, side, side );
pixmapPainter.end();
QImage shadow( doublePixmap.convertToImage().smoothScale( side / 2, side / 2 ) );
// generate a 2 colors pixmap using mixing shadow (made with highlight color)
// and image (made with highlightedText color)
QColor color = palette().active().highlightedText();
int red = color.red(), green = color.green(), blue = color.blue();
color = palette().active().highlight();
int sRed = color.red(), sGreen = color.green(), sBlue = color.blue();
// pointers
unsigned int * data = (unsigned int *)image.bits(),
* shadowData = (unsigned int *)shadow.bits(),
pixels = image.width() * image.height();
// cache data (reduce computation time to 26%!)
int c1 = -1, c2 = -1, cR = 0, cG = 0, cB = 0, cA = 0;
// foreach pixel
for( unsigned int i = 0; i < pixels; ++i )
{
// alpha for shadow and image
int shadowAlpha = shadowData[i] & 0xFF,
srcAlpha = data[i] & 0xFF;
// cache values
if ( srcAlpha != c1 || shadowAlpha != c2 )
{
c1 = srcAlpha;
c2 = shadowAlpha;
// fuse color components and alpha value of image over shadow
data[i] = qRgba(
cR = qt_div255( srcAlpha * red + (255 - srcAlpha) * sRed ),
cG = qt_div255( srcAlpha * green + (255 - srcAlpha) * sGreen ),
cB = qt_div255( srcAlpha * blue + (255 - srcAlpha) * sBlue ),
cA = qt_div255( srcAlpha * srcAlpha + (255 - srcAlpha) * shadowAlpha )
);
}
else
data[i] = qRgba( cR, cG, cB, cA );
}
m_lastRenderedOverlay.convertFromImage( image );
// start the autohide timer
repaint( m_overlayGeometry, false /*clear*/ ); // toggle with next line
//update( m_overlayGeometry );
m_overlayHideTimer->start( 2500, true );
#endif
}
void PresentationWidget::slotNextPage()
{
// loop when configured
if ( m_frameIndex == (int)m_frames.count() - 1 && Settings::slidesLoop() )
m_frameIndex = -1;
if ( m_frameIndex < (int)m_frames.count() - 1 )
{
// go to next page
changePage( m_frameIndex + 1 );
}
else if ( m_transitionTimer->isActive() )
{
m_transitionTimer->stop();
update();
}
// we need the setFocus() call here to let KCursor::autoHide() work correctly
setFocus();
// auto advance to the next page if set
if ( Settings::slidesAdvance() )
QTimer::singleShot( Settings::slidesAdvanceTime() * 1000, this, SLOT( slotNextPage() ) );
}
void PresentationWidget::slotPrevPage()
{
if ( m_frameIndex > 0 )
{
// go to previous page
changePage( m_frameIndex - 1 );
}
else if ( m_transitionTimer->isActive() )
{
m_transitionTimer->stop();
update();
}
}
void PresentationWidget::slotFirstPage()
{
changePage( 0 );
}
void PresentationWidget::slotLastPage()
{
changePage( (int)m_frames.count() - 1 );
}
void PresentationWidget::slotHideOverlay()
{
QRect geom( m_overlayGeometry );
m_overlayGeometry.setCoords( 0, 0, -1, -1 );
update( geom );
}
void PresentationWidget::slotTransitionStep()
{
if ( m_transitionRects.empty() )
{
// it's better to fix the transition to cover the whole screen than
// enabling the following line that wastes cpu for nothing
//update();
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 );
}
const KPDFPageTransition PresentationWidget::defaultTransition() const
{
return defaultTransition( Settings::slidesTransition() );
}
const KPDFPageTransition PresentationWidget::defaultTransition( int type ) const
{
switch ( type )
{
case Settings::EnumSlidesTransition::BlindsHorizontal:
{
KPDFPageTransition transition( KPDFPageTransition::Blinds );
transition.setAlignment( KPDFPageTransition::Horizontal );
return transition;
break;
}
case Settings::EnumSlidesTransition::BlindsVertical:
{
KPDFPageTransition transition( KPDFPageTransition::Blinds );
transition.setAlignment( KPDFPageTransition::Vertical );
return transition;
break;
}
case Settings::EnumSlidesTransition::BoxIn:
{
KPDFPageTransition transition( KPDFPageTransition::Box );
transition.setDirection( KPDFPageTransition::Inward );
return transition;
break;
}
case Settings::EnumSlidesTransition::BoxOut:
{
KPDFPageTransition transition( KPDFPageTransition::Box );
transition.setDirection( KPDFPageTransition::Outward );
return transition;
break;
}
case Settings::EnumSlidesTransition::Dissolve:
{
return KPDFPageTransition( KPDFPageTransition::Dissolve );
break;
}
case Settings::EnumSlidesTransition::GlitterDown:
{
KPDFPageTransition transition( KPDFPageTransition::Glitter );
transition.setAngle( 270 );
return transition;
break;
}
case Settings::EnumSlidesTransition::GlitterRight:
{
KPDFPageTransition transition( KPDFPageTransition::Glitter );
transition.setAngle( 0 );
return transition;
break;
}
case Settings::EnumSlidesTransition::GlitterRightDown:
{
KPDFPageTransition transition( KPDFPageTransition::Glitter );
transition.setAngle( 315 );
return transition;
break;
}
case Settings::EnumSlidesTransition::Random:
{
return defaultTransition( KApplication::random() % 18 );
break;
}
case Settings::EnumSlidesTransition::SplitHorizontalIn:
{
KPDFPageTransition transition( KPDFPageTransition::Split );
transition.setAlignment( KPDFPageTransition::Horizontal );
transition.setDirection( KPDFPageTransition::Inward );
return transition;
break;
}
case Settings::EnumSlidesTransition::SplitHorizontalOut:
{
KPDFPageTransition transition( KPDFPageTransition::Split );
transition.setAlignment( KPDFPageTransition::Horizontal );
transition.setDirection( KPDFPageTransition::Outward );
return transition;
break;
}
case Settings::EnumSlidesTransition::SplitVerticalIn:
{
KPDFPageTransition transition( KPDFPageTransition::Split );
transition.setAlignment( KPDFPageTransition::Vertical );
transition.setDirection( KPDFPageTransition::Inward );
return transition;
break;
}
case Settings::EnumSlidesTransition::SplitVerticalOut:
{
KPDFPageTransition transition( KPDFPageTransition::Split );
transition.setAlignment( KPDFPageTransition::Vertical );
transition.setDirection( KPDFPageTransition::Outward );
return transition;
break;
}
case Settings::EnumSlidesTransition::WipeDown:
{
KPDFPageTransition transition( KPDFPageTransition::Wipe );
transition.setAngle( 270 );
return transition;
break;
}
case Settings::EnumSlidesTransition::WipeRight:
{
KPDFPageTransition transition( KPDFPageTransition::Wipe );
transition.setAngle( 0 );
return transition;
break;
}
case Settings::EnumSlidesTransition::WipeLeft:
{
KPDFPageTransition transition( KPDFPageTransition::Wipe );
transition.setAngle( 180 );
return transition;
break;
}
case Settings::EnumSlidesTransition::WipeUp:
{
KPDFPageTransition transition( KPDFPageTransition::Wipe );
transition.setAngle( 90 );
return transition;
break;
}
case Settings::EnumSlidesTransition::Replace:
default:
return KPDFPageTransition( KPDFPageTransition::Replace );
break;
}
}
/** ONLY the TRANSITIONS GENERATION function from here on **/
void PresentationWidget::initTransition( const KPDFPageTransition *transition )
{
// if it's just a 'replace' transition, repaint the screen
if ( transition->type() == KPDFPageTransition::Replace )
{
update();
return;
}
const bool isInward = transition->direction() == KPDFPageTransition::Inward;
const bool isHorizontal = transition->alignment() == KPDFPageTransition::Horizontal;
const float totalTime = transition->duration();
m_transitionRects.clear();
switch( transition->type() )
{
// split: horizontal / vertical and inward / outward
case KPDFPageTransition::Split:
{
const int steps = isHorizontal ? 100 : 75;
if ( isHorizontal )
{
if ( isInward )
{
int xPosition = 0;
for ( int i = 0; i < steps; i++ )
{
int xNext = ((i + 1) * m_width) / (2 * steps);
m_transitionRects.push_back( QRect( xPosition, 0, xNext - xPosition, m_height ) );
m_transitionRects.push_back( QRect( m_width - xNext, 0, xNext - xPosition, m_height ) );
xPosition = xNext;
}
}
else
{
int xPosition = m_width / 2;
for ( int i = 0; i < steps; i++ )
{
int xNext = ((steps - (i + 1)) * m_width) / (2 * steps);
m_transitionRects.push_back( QRect( xNext, 0, xPosition - xNext, m_height ) );
m_transitionRects.push_back( QRect( m_width - xPosition, 0, xPosition - xNext, m_height ) );
xPosition = xNext;
}
}
}
else
{
if ( isInward )
{
int yPosition = 0;
for ( int i = 0; i < steps; i++ )
{
int yNext = ((i + 1) * m_height) / (2 * steps);
m_transitionRects.push_back( QRect( 0, yPosition, m_width, yNext - yPosition ) );
m_transitionRects.push_back( QRect( 0, m_height - yNext, m_width, yNext - yPosition ) );
yPosition = yNext;
}
}
else
{
int yPosition = m_height / 2;
for ( int i = 0; i < steps; i++ )
{
int yNext = ((steps - (i + 1)) * m_height) / (2 * steps);
m_transitionRects.push_back( QRect( 0, yNext, m_width, yPosition - yNext ) );
m_transitionRects.push_back( QRect( 0, m_height - yPosition, m_width, yPosition - yNext ) );
yPosition = yNext;
}
}
}
m_transitionMul = 2;
m_transitionDelay = (int)( (totalTime * 1000) / steps );
} break;
// blinds: horizontal(l-to-r) / vertical(t-to-b)
case KPDFPageTransition::Blinds:
{
const int blinds = isHorizontal ? 8 : 6;
const int steps = m_width / (4 * blinds);
if ( isHorizontal )
{
int xPosition[ 8 ];
for ( int b = 0; b < blinds; b++ )
xPosition[ b ] = (b * m_width) / blinds;
for ( int i = 0; i < steps; i++ )
{
int stepOffset = (int)( ((float)i * (float)m_width) / ((float)blinds * (float)steps) );
for ( int b = 0; b < blinds; b++ )
{
m_transitionRects.push_back( QRect( xPosition[ b ], 0, stepOffset, m_height ) );
xPosition[ b ] = stepOffset + (b * m_width) / blinds;
}
}
}
else
{
int yPosition[ 6 ];
for ( int b = 0; b < blinds; b++ )
yPosition[ b ] = (b * m_height) / blinds;
for ( int i = 0; i < steps; i++ )
{
int stepOffset = (int)( ((float)i * (float)m_height) / ((float)blinds * (float)steps) );
for ( int b = 0; b < blinds; b++ )
{
m_transitionRects.push_back( QRect( 0, yPosition[ b ], m_width, stepOffset ) );
yPosition[ b ] = stepOffset + (b * m_height) / blinds;
}
}
}
m_transitionMul = blinds;
m_transitionDelay = (int)( (totalTime * 1000) / steps );
} break;
// box: inward / outward
case KPDFPageTransition::Box:
{
const int steps = m_width / 10;
if ( isInward )
{
int L = 0, T = 0, R = m_width, B = m_height;
for ( int i = 0; i < steps; i++ )
{
// compure shrinked box coords
int newL = ((i + 1) * m_width) / (2 * steps);
int newT = ((i + 1) * m_height) / (2 * steps);
int newR = m_width - newL;
int newB = m_height - newT;
// add left, right, topcenter, bottomcenter rects
m_transitionRects.push_back( QRect( L, T, newL - L, B - T ) );
m_transitionRects.push_back( QRect( newR, T, R - newR, B - T ) );
m_transitionRects.push_back( QRect( newL, T, newR - newL, newT - T ) );
m_transitionRects.push_back( QRect( newL, newB, newR - newL, B - newB ) );
L = newL; T = newT; R = newR, B = newB;
}
}
else
{
int L = m_width / 2, T = m_height / 2, R = L, B = T;
for ( int i = 0; i < steps; i++ )
{
// compure shrinked box coords
int newL = ((steps - (i + 1)) * m_width) / (2 * steps);
int newT = ((steps - (i + 1)) * m_height) / (2 * steps);
int newR = m_width - newL;
int newB = m_height - newT;
// add left, right, topcenter, bottomcenter rects
m_transitionRects.push_back( QRect( newL, newT, L - newL, newB - newT ) );
m_transitionRects.push_back( QRect( R, newT, newR - R, newB - newT ) );
m_transitionRects.push_back( QRect( L, newT, R - L, T - newT ) );
m_transitionRects.push_back( QRect( L, B, R - L, newB - B ) );
L = newL; T = newT; R = newR, B = newB;
}
}
m_transitionMul = 4;
m_transitionDelay = (int)( (totalTime * 1000) / steps );
} break;
// wipe: implemented for 4 canonical angles
case KPDFPageTransition::Wipe:
{
const int angle = transition->angle();
const int steps = (angle == 0) || (angle == 180) ? m_width / 8 : m_height / 8;
if ( angle == 0 )
{
int xPosition = 0;
for ( int i = 0; i < steps; i++ )
{
int xNext = ((i + 1) * m_width) / steps;
m_transitionRects.push_back( QRect( xPosition, 0, xNext - xPosition, m_height ) );
xPosition = xNext;
}
}
else if ( angle == 90 )
{
int yPosition = m_height;
for ( int i = 0; i < steps; i++ )
{
int yNext = ((steps - (i + 1)) * m_height) / steps;
m_transitionRects.push_back( QRect( 0, yNext, m_width, yPosition - yNext ) );
yPosition = yNext;
}
}
else if ( angle == 180 )
{
int xPosition = m_width;
for ( int i = 0; i < steps; i++ )
{
int xNext = ((steps - (i + 1)) * m_width) / steps;
m_transitionRects.push_back( QRect( xNext, 0, xPosition - xNext, m_height ) );
xPosition = xNext;
}
}
else if ( angle == 270 )
{
int yPosition = 0;
for ( int i = 0; i < steps; i++ )
{
int yNext = ((i + 1) * m_height) / steps;
m_transitionRects.push_back( QRect( 0, yPosition, m_width, yNext - yPosition ) );
yPosition = yNext;
}
}
else
{
update();
return;
}
m_transitionMul = 1;
m_transitionDelay = (int)( (totalTime * 1000) / steps );
} break;
// dissolve: replace 'random' rects
case KPDFPageTransition::Dissolve:
{
const int gridXsteps = 50;
const int gridYsteps = 38;
const int steps = gridXsteps * gridYsteps;
int oldX = 0;
int oldY = 0;
// create a grid of gridXstep by gridYstep QRects
for ( int y = 0; y < gridYsteps; y++ )
{
int newY = (int)( m_height * ((float)(y+1) / (float)gridYsteps) );
for ( int x = 0; x < gridXsteps; x++ )
{
int newX = (int)( m_width * ((float)(x+1) / (float)gridXsteps) );
m_transitionRects.push_back( QRect( oldX, oldY, newX - oldX, newY - oldY ) );
oldX = newX;
}
oldX = 0;
oldY = newY;
}
// randomize the grid
for ( int i = 0; i < steps; i++ )
{
int n1 = (int)(steps * drand48());
int n2 = (int)(steps * drand48());
// swap items if index differs
if ( n1 != n2 )
{
QRect r = m_transitionRects[ n2 ];
m_transitionRects[ n2 ] = m_transitionRects[ n1 ];
m_transitionRects[ n1 ] = r;
}
}
// set global transition parameters
m_transitionMul = 40;
m_transitionDelay = (int)( (m_transitionMul * 1000 * totalTime) / steps );
} break;
// glitter: similar to dissolve but has a direction
case KPDFPageTransition::Glitter:
{
const int gridXsteps = 50;
const int gridYsteps = 38;
const int steps = gridXsteps * gridYsteps;
const int angle = transition->angle();
// generate boxes using a given direction
if ( angle == 90 )
{
int yPosition = m_height;
for ( int i = 0; i < gridYsteps; i++ )
{
int yNext = ((gridYsteps - (i + 1)) * m_height) / gridYsteps;
int xPosition = 0;
for ( int j = 0; j < gridXsteps; j++ )
{
int xNext = ((j + 1) * m_width) / gridXsteps;
m_transitionRects.push_back( QRect( xPosition, yNext, xNext - xPosition, yPosition - yNext ) );
xPosition = xNext;
}
yPosition = yNext;
}
}
else if ( angle == 180 )
{
int xPosition = m_width;
for ( int i = 0; i < gridXsteps; i++ )
{
int xNext = ((gridXsteps - (i + 1)) * m_width) / gridXsteps;
int yPosition = 0;
for ( int j = 0; j < gridYsteps; j++ )
{
int yNext = ((j + 1) * m_height) / gridYsteps;
m_transitionRects.push_back( QRect( xNext, yPosition, xPosition - xNext, yNext - yPosition ) );
yPosition = yNext;
}
xPosition = xNext;
}
}
else if ( angle == 270 )
{
int yPosition = 0;
for ( int i = 0; i < gridYsteps; i++ )
{
int yNext = ((i + 1) * m_height) / gridYsteps;
int xPosition = 0;
for ( int j = 0; j < gridXsteps; j++ )
{
int xNext = ((j + 1) * m_width) / gridXsteps;
m_transitionRects.push_back( QRect( xPosition, yPosition, xNext - xPosition, yNext - yPosition ) );
xPosition = xNext;
}
yPosition = yNext;
}
}
else // if angle is 0 or 315
{
int xPosition = 0;
for ( int i = 0; i < gridXsteps; i++ )
{
int xNext = ((i + 1) * m_width) / gridXsteps;
int yPosition = 0;
for ( int j = 0; j < gridYsteps; j++ )
{
int yNext = ((j + 1) * m_height) / gridYsteps;
m_transitionRects.push_back( QRect( xPosition, yPosition, xNext - xPosition, yNext - yPosition ) );
yPosition = yNext;
}
xPosition = xNext;
}
}
// add a 'glitter' (1 over 10 pieces is randomized)
int randomSteps = steps / 20;
for ( int i = 0; i < randomSteps; i++ )
{
int n1 = (int)(steps * drand48());
int n2 = (int)(steps * drand48());
// swap items if index differs
if ( n1 != n2 )
{
QRect r = m_transitionRects[ n2 ];
m_transitionRects[ n2 ] = m_transitionRects[ n1 ];
m_transitionRects[ n1 ] = r;
}
}
// set global transition parameters
m_transitionMul = (angle == 90) || (angle == 270) ? gridYsteps : gridXsteps;
m_transitionMul /= 2;
m_transitionDelay = (int)( (m_transitionMul * 1000 * totalTime) / steps );
} break;
// implement missing transitions (a binary raster engine needed here)
case KPDFPageTransition::Fly:
case KPDFPageTransition::Push:
case KPDFPageTransition::Cover:
case KPDFPageTransition::Uncover:
case KPDFPageTransition::Fade:
default:
update();
return;
}
// send the first start to the timer
m_transitionTimer->start( 0, true );
}
#include "presentationwidget.moc"