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00020 #include "posterpreview.h"
00021
00022 #include <kprocess.h>
00023 #include <qpainter.h>
00024 #include <qsimplerichtext.h>
00025 #include <qtimer.h>
00026 #include <qpixmap.h>
00027 #include <kprinter.h>
00028 #include <klocale.h>
00029 #include <kcursor.h>
00030 #include <kglobalsettings.h>
00031
00032 PosterPreview::PosterPreview( QWidget *parent, const char *name )
00033 : QFrame( parent, name )
00034 {
00035 m_postersize = m_mediasize = "A4";
00036 m_cutmargin = 5;
00037 init();
00038 }
00039
00040 PosterPreview::PosterPreview( const QString& postersize, const QString& mediasize, QWidget *parent, const char *name )
00041 : QFrame( parent, name )
00042 {
00043 m_postersize = postersize;
00044 m_mediasize = mediasize;
00045 m_cutmargin = 5;
00046 init();
00047 }
00048
00049 PosterPreview::~PosterPreview()
00050 {
00051 delete m_process;
00052 }
00053
00054 void PosterPreview::init()
00055 {
00056 m_process = new KProcess;
00057 connect( m_process, SIGNAL( receivedStderr( KProcess*, char*, int ) ), SLOT( slotProcessStderr( KProcess*, char*, int ) ) );
00058 connect( m_process, SIGNAL( processExited( KProcess* ) ), SLOT( slotProcessExited( KProcess* ) ) );
00059
00060 m_cols = m_rows = m_pw = m_ph = m_mw = m_mh = 0;
00061 m_dirty = false;
00062 setDirty();
00063 setMouseTracking( true );
00064 setBackgroundMode( Qt::NoBackground );
00065 }
00066
00067 void PosterPreview::parseBuffer()
00068 {
00069 int rotate;
00070 float pw, ph, mw, mh;
00071 float x1, x2, y1, y2;
00072 sscanf( m_buffer.ascii(), "%d %d %d %g %g %g %g %g %g %g %g", &m_rows, &m_cols, &rotate,
00073 &pw, &ph, &mw, &mh, &x1, &y1, &x2, &y2 );
00074 m_pw = ( int )( rotate ? ph : pw );
00075 m_ph = ( int )( rotate ? pw : ph );
00076 m_mw = ( int )( rotate ? mh : mw );
00077 m_mh = ( int )( rotate ? mw : mh );
00078 m_posterbb.setCoords( ( int )x1, ( int )y1, ( int )x2, ( int )y2 );
00079 }
00080
00081 void PosterPreview::setDirty()
00082 {
00083 if ( !m_dirty )
00084 {
00085 m_dirty = true;
00086 QTimer::singleShot( 1, this, SLOT( updatePoster() ) );
00087 }
00088 }
00089
00090 void PosterPreview::updatePoster()
00091 {
00092 m_buffer = "";
00093 m_process->clearArguments();
00094 *m_process << "poster" << "-F" << "-m" + m_mediasize << "-p" + m_postersize
00095 << "-c" + QString::number( m_cutmargin ) + "%";
00096 if ( !m_process->start( KProcess::NotifyOnExit, KProcess::Stderr ) )
00097 {
00098 m_rows = m_cols = 0;
00099 m_dirty = false;
00100 update();
00101 }
00102 }
00103
00104 void PosterPreview::drawContents( QPainter *painter )
00105 {
00106 QPixmap pix( width(), height() );
00107 QPainter *p = new QPainter( &pix );
00108
00109 p->fillRect( 0, 0, width(), height(), colorGroup().background() );
00110
00111 if ( isEnabled() )
00112 {
00113 if ( m_rows <= 0 || m_cols <= 0 || m_pw <= 0 || m_ph <= 0 )
00114 {
00115 QString txt = i18n( "Poster preview not available. Either the <b>poster</b> "
00116 "executable is not properly installed, or you don't have "
00117 "the required version; available at http://printing.kde.org/downloads/." );
00118 QSimpleRichText richtext( ( m_buffer.isEmpty() ? txt : m_buffer.prepend( "<pre>" ).append( "</pre>" ) ), p->font() );
00119 richtext.adjustSize();
00120 int x = ( width()-richtext.widthUsed() )/2, y = ( height()-richtext.height() )/2;
00121 x = QMAX( x, 0 );
00122 y = QMAX( y, 0 );
00123 richtext.draw( p, x, y, QRect( x, y, richtext.widthUsed(), richtext.height() ), colorGroup() );
00124 m_boundingrect = QRect();
00125 }
00126 else
00127 {
00128 int totalx = m_cols*m_pw, totaly = m_rows*m_ph;
00129 float scale = QMIN( float( width()-1 )/totalx, float( height()-1 )/totaly );
00130 p->translate( 0, height()-1 );
00131 p->scale( scale, -scale );
00132 int x = ( int )( width()/scale-totalx )/2, y = ( int )( height()/scale-totaly )/2;
00133 p->translate( x, y );
00134 m_boundingrect = p->xForm( QRect( 0, 0, totalx, totaly ) );
00135
00136 x = y = 0;
00137 int px = m_posterbb.x(), py = m_posterbb.y(), pw = m_posterbb.width(), ph = m_posterbb.height();
00138 for ( int i=0; i<m_rows; i++, y+=m_ph, x=0 )
00139 {
00140 for ( int j=0; j<m_cols; j++, x+=m_pw )
00141 {
00142 bool selected = ( m_selectedpages.find( i*m_cols+j+1 ) != m_selectedpages.end() );
00143 p->fillRect( x+1, y+1, m_pw-2, m_ph-2, ( selected ? KGlobalSettings::highlightColor() : white ) );
00144 p->drawRect( x, y, m_pw, m_ph );
00145 if ( pw > 0 && ph > 0 )
00146 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 ),
00147 ( selected ? KGlobalSettings::highlightColor().dark( 160 ) : lightGray ) );
00148 p->setPen( Qt::DotLine );
00149 p->drawRect( x+m_mw, y+m_mh, m_pw-2*m_mw, m_ph-2*m_mh );
00150 p->setPen( Qt::SolidLine );
00151
00152 pw -= m_pw-2*m_mw-px;
00153 px = 0;
00154 }
00155
00156 px = m_posterbb.x();
00157 ph -= m_ph-2*m_mh-py;
00158 py = 0;
00159 pw = m_posterbb.width();
00160 }
00161 }
00162 }
00163
00164 delete p;
00165 painter->drawPixmap( 0, 0, pix );
00166 }
00167
00168 void PosterPreview::mouseMoveEvent( QMouseEvent *e )
00169 {
00170 if ( m_boundingrect.isValid() )
00171 {
00172 if ( m_boundingrect.contains( e->pos() ) )
00173 setCursor( KCursor::handCursor() );
00174 else
00175 setCursor( KCursor::arrowCursor() );
00176 }
00177 }
00178
00179 void PosterPreview::mousePressEvent( QMouseEvent *e )
00180 {
00181 if ( e->button() == Qt::LeftButton && m_boundingrect.isValid() )
00182 {
00183 if ( m_boundingrect.contains( e->pos() ) )
00184 {
00185 int c, r;
00186 c = ( e->pos().x()-m_boundingrect.x() )/( m_boundingrect.width()/m_cols ) + 1;
00187 r = m_rows - ( e->pos().y()-m_boundingrect.y() )/( m_boundingrect.height()/m_rows );
00188 int pagenum = ( r-1 )*m_cols+c;
00189
00190 if ( m_selectedpages.find( pagenum ) == m_selectedpages.end() ||
00191 !( e->state() & Qt::ShiftButton ) )
00192 {
00193 if ( !( e->state() & Qt::ShiftButton ) )
00194 m_selectedpages.clear();
00195 m_selectedpages.append( pagenum );
00196 update();
00197 emitSelectedPages();
00198 }
00199 }
00200 else if ( m_selectedpages.count() > 0 )
00201 {
00202 m_selectedpages.clear();
00203 update();
00204 emitSelectedPages();
00205 }
00206 }
00207 }
00208
00209 void PosterPreview::slotProcessStderr( KProcess*, char *buf, int len )
00210 {
00211 m_buffer.append( QCString( buf, len ) );
00212 }
00213
00214 void PosterPreview::slotProcessExited( KProcess* )
00215 {
00216 if ( m_process->normalExit() && m_process->exitStatus() == 0 )
00217 parseBuffer();
00218 else
00219 m_rows = m_cols = 0;
00220
00221 m_dirty = false;
00222 update();
00223 }
00224
00225 void PosterPreview::setPosterSize( int s )
00226 {
00227 setPosterSize( pageSizeToPageName( KPrinter::PageSize( s ) ) );
00228 }
00229
00230 void PosterPreview::setPosterSize( const QString& s )
00231 {
00232 if ( m_postersize != s )
00233 {
00234 m_selectedpages.clear();
00235 m_postersize = s;
00236 setDirty();
00237 emitSelectedPages();
00238 }
00239 }
00240
00241 void PosterPreview::setMediaSize( int s )
00242 {
00243 setMediaSize( pageSizeToPageName( ( KPrinter::PageSize )s ) );
00244 }
00245
00246 void PosterPreview::setMediaSize( const QString& s )
00247 {
00248 if ( m_mediasize != s )
00249 {
00250 m_selectedpages.clear();
00251 m_mediasize = s;
00252 setDirty();
00253 emitSelectedPages();
00254 }
00255 }
00256
00257 void PosterPreview::setCutMargin( int value )
00258 {
00259 m_cutmargin = value;
00260 setDirty();
00261 }
00262
00263 void PosterPreview::setSelectedPages( const QString& s )
00264 {
00265 QStringList l = QStringList::split( ",", s, false );
00266 m_selectedpages.clear();
00267 for ( QStringList::ConstIterator it=l.begin(); it!=l.end(); ++it )
00268 {
00269 int p;
00270 if ( ( p = ( *it ).find( '-' ) ) == -1 )
00271 m_selectedpages.append( ( *it ).toInt() );
00272 else
00273 {
00274 int p1 = ( *it ).left( p ).toInt(), p2 = ( *it ).mid( p+1 ).toInt();
00275 for ( int i=p1; i<=p2; i++ )
00276 m_selectedpages.append( i );
00277 }
00278 }
00279 update();
00280 }
00281
00282 void PosterPreview::emitSelectedPages()
00283 {
00284 QString s;
00285 if ( m_selectedpages.count() > 0 )
00286 {
00287 for ( QValueList<int>::ConstIterator it=m_selectedpages.begin(); it!=m_selectedpages.end(); ++it )
00288 s.append( QString::number( *it ) + "," );
00289 s.truncate( s.length()-1 );
00290 }
00291 emit selectionChanged( s );
00292 }
00293
00294 #include "posterpreview.moc"