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posterpreview.cpp
1 /*
2  * This file is part of the KDE libraries
3  * Copyright (c) 2001-2002 Michael Goffioul <tdeprint@swing.be>
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Library General Public
7  * License version 2 as published by the Free Software Foundation.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public License
15  * along with this library; see the file COPYING.LIB. If not, write to
16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  **/
19 
20 #include "posterpreview.h"
21 
22 #include <tdeprocess.h>
23 #include <tqpainter.h>
24 #include <tqsimplerichtext.h>
25 #include <tqtimer.h>
26 #include <tqpixmap.h>
27 #include <kprinter.h>
28 #include <tdelocale.h>
29 #include <kcursor.h>
30 #include <tdeglobalsettings.h>
31 
32 PosterPreview::PosterPreview( TQWidget *parent, const char *name )
33  : TQFrame( parent, name )
34 {
35  m_postersize = m_mediasize = "A4";
36  m_cutmargin = 5;
37  init();
38 }
39 
40 PosterPreview::PosterPreview( const TQString& postersize, const TQString& mediasize, TQWidget *parent, const char *name )
41  : TQFrame( parent, name )
42 {
43  m_postersize = postersize;
44  m_mediasize = mediasize;
45  m_cutmargin = 5;
46  init();
47 }
48 
49 PosterPreview::~PosterPreview()
50 {
51  delete m_process;
52 }
53 
54 void PosterPreview::init()
55 {
56  m_process = new TDEProcess;
57  connect( m_process, TQ_SIGNAL( receivedStderr( TDEProcess*, char*, int ) ), TQ_SLOT( slotProcessStderr( TDEProcess*, char*, int ) ) );
58  connect( m_process, TQ_SIGNAL( processExited( TDEProcess* ) ), TQ_SLOT( slotProcessExited( TDEProcess* ) ) );
59 
60  m_cols = m_rows = m_pw = m_ph = m_mw = m_mh = 0;
61  m_dirty = false;
62  setDirty();
63  setMouseTracking( true );
64  setBackgroundMode( TQt::NoBackground );
65 }
66 
67 void PosterPreview::parseBuffer()
68 {
69  int rotate;
70  float pw, ph, mw, mh;
71  float x1, x2, y1, y2;
72  sscanf( m_buffer.ascii(), "%d %d %d %g %g %g %g %g %g %g %g", &m_rows, &m_cols, &rotate,
73  &pw, &ph, &mw, &mh, &x1, &y1, &x2, &y2 );
74  m_pw = ( int )( rotate ? ph : pw );
75  m_ph = ( int )( rotate ? pw : ph );
76  m_mw = ( int )( rotate ? mh : mw );
77  m_mh = ( int )( rotate ? mw : mh );
78  m_posterbb.setCoords( ( int )x1, ( int )y1, ( int )x2, ( int )y2 );
79 }
80 
81 void PosterPreview::setDirty()
82 {
83  if ( !m_dirty )
84  {
85  m_dirty = true;
86  TQTimer::singleShot( 1, this, TQ_SLOT( updatePoster() ) );
87  }
88 }
89 
90 void PosterPreview::updatePoster()
91 {
92  m_buffer = "";
93  m_process->clearArguments();
94  *m_process << "poster" << "-F" << "-m" + m_mediasize << "-p" + m_postersize
95  << "-c" + TQString::number( m_cutmargin ) + "%";
96  if ( !m_process->start( TDEProcess::NotifyOnExit, TDEProcess::Stderr ) )
97  {
98  m_rows = m_cols = 0;
99  m_dirty = false;
100  update();
101  }
102 }
103 
104 void PosterPreview::drawContents( TQPainter *painter )
105 {
106  TQPixmap pix( width(), height() );
107  TQPainter *p = new TQPainter( &pix );
108 
109  p->fillRect( 0, 0, width(), height(), colorGroup().background() );
110 
111  if ( isEnabled() )
112  {
113  if ( m_rows <= 0 || m_cols <= 0 || m_pw <= 0 || m_ph <= 0 )
114  {
115  TQString txt = i18n( "Poster preview not available. Either the <b>poster</b> "
116  "executable is not properly installed, or you don't have the required version" );
117  TQSimpleRichText richtext( ( m_buffer.isEmpty() ? txt : m_buffer.prepend( "<pre>" ).append( "</pre>" ) ), p->font() );
118  richtext.adjustSize();
119  int x = ( width()-richtext.widthUsed() )/2, y = ( height()-richtext.height() )/2;
120  x = TQMAX( x, 0 );
121  y = TQMAX( y, 0 );
122  richtext.draw( p, x, y, TQRect( x, y, richtext.widthUsed(), richtext.height() ), colorGroup() );
123  m_boundingrect = TQRect();
124  }
125  else
126  {
127  int totalx = m_cols*m_pw, totaly = m_rows*m_ph;
128  float scale = TQMIN( float( width()-1 )/totalx, float( height()-1 )/totaly );
129  p->translate( 0, height()-1 );
130  p->scale( scale, -scale );
131  int x = ( int )( width()/scale-totalx )/2, y = ( int )( height()/scale-totaly )/2;
132  p->translate( x, y );
133  m_boundingrect = p->xForm( TQRect( 0, 0, totalx, totaly ) );
134 
135  x = y = 0;
136  int px = m_posterbb.x(), py = m_posterbb.y(), pw = m_posterbb.width(), ph = m_posterbb.height();
137  for ( int i=0; i<m_rows; i++, y+=m_ph, x=0 )
138  {
139  for ( int j=0; j<m_cols; j++, x+=m_pw )
140  {
141  bool selected = ( m_selectedpages.find( i*m_cols+j+1 ) != m_selectedpages.end() );
142  p->fillRect( x+1, y+1, m_pw-2, m_ph-2, ( selected ? TDEGlobalSettings::highlightColor() : white ) );
143  p->drawRect( x, y, m_pw, m_ph );
144  if ( pw > 0 && ph > 0 )
145  p->fillRect( x+m_mw+px, y+m_mh+py, TQMIN( pw, m_pw-2*m_mw-px ), TQMIN( ph, m_ph-2*m_mh-py ),
146  ( selected ? TQColor(TDEGlobalSettings::highlightColor().dark( 160 )) : lightGray ) );
147  p->setPen( TQt::DotLine );
148  p->drawRect( x+m_mw, y+m_mh, m_pw-2*m_mw, m_ph-2*m_mh );
149  p->setPen( TQt::SolidLine );
150 
151  pw -= m_pw-2*m_mw-px;
152  px = 0;
153  }
154 
155  px = m_posterbb.x();
156  ph -= m_ph-2*m_mh-py;
157  py = 0;
158  pw = m_posterbb.width();
159  }
160  }
161  }
162 
163  delete p;
164  painter->drawPixmap( 0, 0, pix );
165 }
166 
167 void PosterPreview::mouseMoveEvent( TQMouseEvent *e )
168 {
169  if ( m_boundingrect.isValid() )
170  {
171  if ( m_boundingrect.contains( e->pos() ) )
172  setCursor( KCursor::handCursor() );
173  else
174  setCursor( KCursor::arrowCursor() );
175  }
176 }
177 
178 void PosterPreview::mousePressEvent( TQMouseEvent *e )
179 {
180  if ( e->button() == TQt::LeftButton && m_boundingrect.isValid() )
181  {
182  if ( m_boundingrect.contains( e->pos() ) )
183  {
184  int c, r;
185  c = ( e->pos().x()-m_boundingrect.x() )/( m_boundingrect.width()/m_cols ) + 1;
186  r = m_rows - ( e->pos().y()-m_boundingrect.y() )/( m_boundingrect.height()/m_rows );
187  int pagenum = ( r-1 )*m_cols+c;
188 
189  if ( m_selectedpages.find( pagenum ) == m_selectedpages.end() ||
190  !( e->state() & TQt::ShiftButton ) )
191  {
192  if ( !( e->state() & TQt::ShiftButton ) )
193  m_selectedpages.clear();
194  m_selectedpages.append( pagenum );
195  update();
196  emitSelectedPages();
197  }
198  }
199  else if ( m_selectedpages.count() > 0 )
200  {
201  m_selectedpages.clear();
202  update();
203  emitSelectedPages();
204  }
205  }
206 }
207 
208 void PosterPreview::slotProcessStderr( TDEProcess*, char *buf, int len )
209 {
210  m_buffer.append( TQCString( buf, len ) );
211 }
212 
213 void PosterPreview::slotProcessExited( TDEProcess* )
214 {
215  if ( m_process->normalExit() && m_process->exitStatus() == 0 )
216  parseBuffer();
217  else
218  m_rows = m_cols = 0;
219 
220  m_dirty = false;
221  update();
222 }
223 
224 void PosterPreview::setPosterSize( int s )
225 {
226  setPosterSize( pageSizeToPageName( KPrinter::PageSize( s ) ) );
227 }
228 
229 void PosterPreview::setPosterSize( const TQString& s )
230 {
231  if ( m_postersize != s )
232  {
233  m_selectedpages.clear();
234  m_postersize = s;
235  setDirty();
236  emitSelectedPages();
237  }
238 }
239 
240 void PosterPreview::setMediaSize( int s )
241 {
242  setMediaSize( pageSizeToPageName( ( KPrinter::PageSize )s ) );
243 }
244 
245 void PosterPreview::setMediaSize( const TQString& s )
246 {
247  if ( m_mediasize != s )
248  {
249  m_selectedpages.clear();
250  m_mediasize = s;
251  setDirty();
252  emitSelectedPages();
253  }
254 }
255 
256 void PosterPreview::setCutMargin( int value )
257 {
258  m_cutmargin = value;
259  setDirty();
260 }
261 
262 void PosterPreview::setSelectedPages( const TQString& s )
263 {
264  TQStringList l = TQStringList::split( ",", s, false );
265  m_selectedpages.clear();
266  for ( TQStringList::ConstIterator it=l.begin(); it!=l.end(); ++it )
267  {
268  int p;
269  if ( ( p = ( *it ).find( '-' ) ) == -1 )
270  m_selectedpages.append( ( *it ).toInt() );
271  else
272  {
273  int p1 = ( *it ).left( p ).toInt(), p2 = ( *it ).mid( p+1 ).toInt();
274  for ( int i=p1; i<=p2; i++ )
275  m_selectedpages.append( i );
276  }
277  }
278  update();
279 }
280 
281 void PosterPreview::emitSelectedPages()
282 {
283  TQString s;
284  if ( m_selectedpages.count() > 0 )
285  {
286  for ( TQValueList<int>::ConstIterator it=m_selectedpages.begin(); it!=m_selectedpages.end(); ++it )
287  s.append( TQString::number( *it ) + "," );
288  s.truncate( s.length()-1 );
289  }
290  emit selectionChanged( s );
291 }
292 
293 #include "posterpreview.moc"
KPrinter::PageSize
PageSize
Defines the paper size to use.
Definition: kprinter.h:168

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