posterpreview.cpp
/*
* This file is part of the KDE libraries
* Copyright (c) 2001-2002 Michael Goffioul <kdeprint@swing.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License version 2 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
**/
#include "posterpreview.h"
#include <kprocess.h>
#include <qpainter.h>
#include <qsimplerichtext.h>
#include <qtimer.h>
#include <qpixmap.h>
#include <kprinter.h>
#include <klocale.h>
#include <kcursor.h>
#include <kglobalsettings.h>
PosterPreview::PosterPreview( QWidget *parent, const char *name )
: QFrame( parent, name )
{
m_postersize = m_mediasize = "A4";
m_cutmargin = 5;
init();
}
PosterPreview::PosterPreview( const QString& postersize, const QString& mediasize, QWidget *parent, const char *name )
: QFrame( parent, name )
{
m_postersize = postersize;
m_mediasize = mediasize;
m_cutmargin = 5;
init();
}
PosterPreview::~PosterPreview()
{
delete m_process;
}
void PosterPreview::init()
{
m_process = new KProcess;
connect( m_process, SIGNAL( receivedStderr( KProcess*, char*, int ) ), SLOT( slotProcessStderr( KProcess*, char*, int ) ) );
connect( m_process, SIGNAL( processExited( KProcess* ) ), SLOT( slotProcessExited( KProcess* ) ) );
m_cols = m_rows = m_pw = m_ph = m_mw = m_mh = 0;
m_dirty = false;
setDirty();
setMouseTracking( true );
setBackgroundMode( Qt::NoBackground );
}
void PosterPreview::parseBuffer()
{
int rotate;
float pw, ph, mw, mh;
float x1, x2, y1, y2;
sscanf( m_buffer.ascii(), "%d %d %d %g %g %g %g %g %g %g %g", &m_rows, &m_cols, &rotate,
&pw, &ph, &mw, &mh, &x1, &y1, &x2, &y2 );
m_pw = ( int )( rotate ? ph : pw );
m_ph = ( int )( rotate ? pw : ph );
m_mw = ( int )( rotate ? mh : mw );
m_mh = ( int )( rotate ? mw : mh );
m_posterbb.setCoords( ( int )x1, ( int )y1, ( int )x2, ( int )y2 );
}
void PosterPreview::setDirty()
{
if ( !m_dirty )
{
m_dirty = true;
QTimer::singleShot( 1, this, SLOT( updatePoster() ) );
}
}
void PosterPreview::updatePoster()
{
m_buffer = "";
m_process->clearArguments();
*m_process << "poster" << "-F" << "-m" + m_mediasize << "-p" + m_postersize
<< "-c" + QString::number( m_cutmargin ) + "%";
if ( !m_process->start( KProcess::NotifyOnExit, KProcess::Stderr ) )
{
m_rows = m_cols = 0;
m_dirty = false;
update();
}
}
void PosterPreview::drawContents( QPainter *painter )
{
QPixmap pix( width(), height() );
QPainter *p = new QPainter( &pix );
p->fillRect( 0, 0, width(), height(), colorGroup().background() );
if ( isEnabled() )
{
if ( m_rows <= 0 || m_cols <= 0 || m_pw <= 0 || m_ph <= 0 )
{
QString txt = i18n( "Poster preview not available. Either the <b>poster</b> "
"executable is not properly installed, or you don't have "
"the required version; available at http://printing.kde.org/downloads/." );
QSimpleRichText richtext( ( m_buffer.isEmpty() ? txt : m_buffer.prepend( "<pre>" ).append( "</pre>" ) ), p->font() );
richtext.adjustSize();
int x = ( width()-richtext.widthUsed() )/2, y = ( height()-richtext.height() )/2;
x = QMAX( x, 0 );
y = QMAX( y, 0 );
richtext.draw( p, x, y, QRect( x, y, richtext.widthUsed(), richtext.height() ), colorGroup() );
m_boundingrect = QRect();
}
else
{
int totalx = m_cols*m_pw, totaly = m_rows*m_ph;
float scale = QMIN( float( width()-1 )/totalx, float( height()-1 )/totaly );
p->translate( 0, height()-1 );
p->scale( scale, -scale );
int x = ( int )( width()/scale-totalx )/2, y = ( int )( height()/scale-totaly )/2;
p->translate( x, y );
m_boundingrect = p->xForm( QRect( 0, 0, totalx, totaly ) );
x = y = 0;
int px = m_posterbb.x(), py = m_posterbb.y(), pw = m_posterbb.width(), ph = m_posterbb.height();
for ( int i=0; i<m_rows; i++, y+=m_ph, x=0 )
{
for ( int j=0; j<m_cols; j++, x+=m_pw )
{
bool selected = ( m_selectedpages.find( i*m_cols+j+1 ) != m_selectedpages.end() );
p->fillRect( x+1, y+1, m_pw-2, m_ph-2, ( selected ? KGlobalSettings::highlightColor() : white ) );
p->drawRect( x, y, m_pw, m_ph );
if ( pw > 0 && ph > 0 )
p->fillRect( x+m_mw+px, y+m_mh+py, QMIN( pw, m_pw-2*m_mw-px ), QMIN( ph, m_ph-2*m_mh-py ),
( selected ? KGlobalSettings::highlightColor().dark( 160 ) : lightGray ) );
p->setPen( Qt::DotLine );
p->drawRect( x+m_mw, y+m_mh, m_pw-2*m_mw, m_ph-2*m_mh );
p->setPen( Qt::SolidLine );
pw -= m_pw-2*m_mw-px;
px = 0;
}
px = m_posterbb.x();
ph -= m_ph-2*m_mh-py;
py = 0;
pw = m_posterbb.width();
}
}
}
delete p;
painter->drawPixmap( 0, 0, pix );
}
void PosterPreview::mouseMoveEvent( QMouseEvent *e )
{
if ( m_boundingrect.isValid() )
{
if ( m_boundingrect.contains( e->pos() ) )
setCursor( KCursor::handCursor() );
else
setCursor( KCursor::arrowCursor() );
}
}
void PosterPreview::mousePressEvent( QMouseEvent *e )
{
if ( e->button() == Qt::LeftButton && m_boundingrect.isValid() )
{
if ( m_boundingrect.contains( e->pos() ) )
{
int c, r;
c = ( e->pos().x()-m_boundingrect.x() )/( m_boundingrect.width()/m_cols ) + 1;
r = m_rows - ( e->pos().y()-m_boundingrect.y() )/( m_boundingrect.height()/m_rows );
int pagenum = ( r-1 )*m_cols+c;
if ( m_selectedpages.find( pagenum ) == m_selectedpages.end() ||
!( e->state() & Qt::ShiftButton ) )
{
if ( !( e->state() & Qt::ShiftButton ) )
m_selectedpages.clear();
m_selectedpages.append( pagenum );
update();
emitSelectedPages();
}
}
else if ( m_selectedpages.count() > 0 )
{
m_selectedpages.clear();
update();
emitSelectedPages();
}
}
}
void PosterPreview::slotProcessStderr( KProcess*, char *buf, int len )
{
m_buffer.append( QCString( buf, len ) );
}
void PosterPreview::slotProcessExited( KProcess* )
{
if ( m_process->normalExit() && m_process->exitStatus() == 0 )
parseBuffer();
else
m_rows = m_cols = 0;
m_dirty = false;
update();
}
void PosterPreview::setPosterSize( int s )
{
setPosterSize( pageSizeToPageName( KPrinter::PageSize( s ) ) );
}
void PosterPreview::setPosterSize( const QString& s )
{
if ( m_postersize != s )
{
m_selectedpages.clear();
m_postersize = s;
setDirty();
emitSelectedPages();
}
}
void PosterPreview::setMediaSize( int s )
{
setMediaSize( pageSizeToPageName( ( KPrinter::PageSize )s ) );
}
void PosterPreview::setMediaSize( const QString& s )
{
if ( m_mediasize != s )
{
m_selectedpages.clear();
m_mediasize = s;
setDirty();
emitSelectedPages();
}
}
void PosterPreview::setCutMargin( int value )
{
m_cutmargin = value;
setDirty();
}
void PosterPreview::setSelectedPages( const QString& s )
{
QStringList l = QStringList::split( ",", s, false );
m_selectedpages.clear();
for ( QStringList::ConstIterator it=l.begin(); it!=l.end(); ++it )
{
int p;
if ( ( p = ( *it ).find( '-' ) ) == -1 )
m_selectedpages.append( ( *it ).toInt() );
else
{
int p1 = ( *it ).left( p ).toInt(), p2 = ( *it ).mid( p+1 ).toInt();
for ( int i=p1; i<=p2; i++ )
m_selectedpages.append( i );
}
}
update();
}
void PosterPreview::emitSelectedPages()
{
QString s;
if ( m_selectedpages.count() > 0 )
{
for ( QValueList<int>::ConstIterator it=m_selectedpages.begin(); it!=m_selectedpages.end(); ++it )
s.append( QString::number( *it ) + "," );
s.truncate( s.length()-1 );
}
emit selectionChanged( s );
}
#include "posterpreview.moc"
KPrinter::PageSize
PageSize
Defines the paper size to use.
Definition: kprinter.h:167

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