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kprintpreview.cpp
1 /*
2  * This file is part of the KDE libraries
3  * Copyright (c) 2001 Michael Goffioul <tdeprint@swing.be>
4  *
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License version 2 as published by the Free Software Foundation.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Library General Public License for more details.
14  *
15  * You should have received a copy of the GNU Library General Public License
16  * along with this library; see the file COPYING.LIB. If not, write to
17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18  * Boston, MA 02110-1301, USA.
19  **/
20 
21 #include "kprintpreview.h"
22 #include "kmfactory.h"
23 
24 #include <tqfile.h>
25 #include <tqlayout.h>
26 #include <tqvbox.h>
27 
28 #include <tdeparts/part.h>
29 #include <tdeaccel.h>
30 #include <tdeaction.h>
31 #include <klibloader.h>
32 #include <ktrader.h>
33 #include <kuserprofile.h>
34 #include <krun.h>
35 #include <tdeapplication.h>
36 #include <kstandarddirs.h>
37 #include <tdelocale.h>
38 #include <tdemessagebox.h>
39 #include <kdebug.h>
40 #include <tdeconfig.h>
41 #include <tdetoolbar.h>
42 #include <kmimetype.h>
43 
44 KPreviewProc::KPreviewProc()
45 : TDEProcess()
46 {
47  m_bOk = false;
48  connect(this, TQ_SIGNAL(processExited(TDEProcess*)), TQ_SLOT(slotProcessExited(TDEProcess*)));
49 }
50 
51 KPreviewProc::~KPreviewProc()
52 {
53 }
54 
55 bool KPreviewProc::startPreview()
56 {
57  if (start())
58  {
59  kapp->enter_loop();
60  return m_bOk;
61  }
62  else
63  return false;
64 }
65 
66 void KPreviewProc::slotProcessExited(TDEProcess* proc)
67 {
68  kapp->exit_loop();
69  if ( proc->normalExit() && proc->exitStatus() == 0 )
70  m_bOk = true;
71  else
72  kdDebug(500) << "KPreviewProc::slotProcessExited: normalExit=" << proc->normalExit()
73  << " exitStatus=" << proc->exitStatus() << endl;
74 }
75 
76 //*******************************************************************************************
77 
78 class KPrintPreview::KPrintPreviewPrivate
79 {
80 public:
81  KPrintPreviewPrivate(KPrintPreview *dlg) : gvpart_(0)
82  {
83  mainwidget_ = new TQWidget(dlg, "MainWidget");
84  toolbar_ = new TDEToolBar(mainwidget_, "PreviewToolBar", true);
85  actions_ = new TDEActionCollection(dlg);
86  accel_ = new TDEAccel(dlg);
87  previewonly_ = false;
88  }
89  ~KPrintPreviewPrivate()
90  {
91  if (gvpart_) delete gvpart_;
92  }
93  void plugAction(TDEAction *act)
94  {
95  act->plug(toolbar_);
96  act->plugAccel(accel_);
97  }
98 
99  KParts::ReadOnlyPart *gvpart_;
100  TDEToolBar *toolbar_;
101  TDEActionCollection *actions_;
102  TQWidget *mainwidget_;
103  TDEAccel *accel_;
104  bool previewonly_;
105 };
106 
107 static KLibFactory* componentFactory()
108 {
109  kdDebug(500) << "tdeprint: querying trader for 'application/postscript' service" << endl;
110  KLibFactory *factory(0);
111  factory = KLibLoader::self()->factory("libkghostviewpart");
112  if( factory )
113  return factory;
114  TDETrader::OfferList offers = TDETrader::self()->query(TQString::fromLatin1("application/postscript"), TQString::fromLatin1("KParts/ReadOnlyPart"), TQString::null, TQString::null);
115  for (TDETrader::OfferList::ConstIterator it = offers.begin(); it != offers.end(); ++it)
116  {
117  KService::Ptr service = *it;
118  factory = KLibLoader::self()->factory(TQFile::encodeName(service->library()));
119  if (factory)
120  break;
121  }
122  if (!factory)
123  {
124  // nothing has been found, try to load directly the KGhostview part
125  factory = KLibLoader::self()->factory("libkghostviewpart");
126  }
127  return factory;
128 }
129 
130 static bool continuePrint(const TQString& msg_, TQWidget *parent, bool previewOnly)
131 {
132  TQString msg(msg_);
133  if (previewOnly)
134  {
135  KMessageBox::error(parent, msg);
136  return false;
137  }
138  else
139  {
140  msg.append(" ").append(i18n("Do you want to continue printing anyway?"));
141  return (KMessageBox::warningContinueCancel(parent, msg, TQString::null, KGuiItem(i18n("Print"),"document-print")) == KMessageBox::Continue);
142  }
143 }
144 
145 //*******************************************************************************************
146 
147 KPrintPreview::KPrintPreview(TQWidget *parent, bool previewOnly)
148 : KDialogBase(parent, "PreviewDlg", true, i18n("Print Preview"), 0)
149 {
150  kdDebug(500) << "tdeprint: creating preview dialog" << endl;
151  d = new KPrintPreviewPrivate(this);
152  d->previewonly_ = previewOnly;
153 
154  // create main view and actions
155  setMainWidget(d->mainwidget_);
156  if (previewOnly)
157  KStdAction::close(this, TQ_SLOT(reject()), d->actions_, "close_print");
158  else
159  {
160  new TDEAction(i18n("Print"), "document-print", TQt::Key_Return, this, TQ_SLOT(accept()), d->actions_, "continue_print");
161  new TDEAction(i18n("Cancel"), "process-stop", TQt::Key_Escape, this, TQ_SLOT(reject()), d->actions_, "stop_print");
162  }
163 
164 }
165 
166 KPrintPreview::~KPrintPreview()
167 {
168  delete d;
169 }
170 
171 void KPrintPreview::initView(KLibFactory *factory)
172 {
173  // load the component
174  d->gvpart_ = (KParts::ReadOnlyPart*)factory->create(d->mainwidget_, "gvpart", "KParts::ReadOnlyPart");
175 
176  // populate the toolbar
177  if (d->previewonly_)
178  d->plugAction(d->actions_->action("close_print"));
179  else
180  {
181  d->plugAction(d->actions_->action("continue_print"));
182  d->plugAction(d->actions_->action("stop_print"));
183  }
184  if (d->gvpart_)
185  {
186  TQDomNodeList l = d->gvpart_->domDocument().elementsByTagName( "ToolBar" );
187  if ( l.length() > 0 )
188  {
189  d->toolbar_->insertLineSeparator();
190  TQDomNodeList acts = l.item( 0 ).toElement().elementsByTagName( "Action" );
191  for ( uint i=0; i<acts.length(); i++ )
192  {
193  TQDomElement a = acts.item( i ).toElement();
194  if ( a.attribute( "name" ) == "goToPage" )
195  continue;
196  TDEAction *act = d->gvpart_->action( a );
197  if ( act != 0 )
198  d->plugAction( act );
199  }
200  }
201  /*
202  TDEAction *act;
203  d->toolbar_->insertLineSeparator();
204  if ((act = d->gvpart_->action("zoomIn")) != 0)
205  d->plugAction(act);
206  if ((act = d->gvpart_->action("zoomOut")) != 0)
207  d->plugAction(act);
208  d->toolbar_->insertSeparator();
209  if ((act = d->gvpart_->action("prevPage")) != 0)
210  d->plugAction(act);
211  if ((act = d->gvpart_->action("nextPage")) != 0)
212  d->plugAction(act);
213  */
214  }
215  d->toolbar_->setIconText(TDEToolBar::IconTextRight);
216  d->toolbar_->setBarPos(TDEToolBar::Top);
217  d->toolbar_->setMovingEnabled(false);
218  //d->adjustSize();
219 
220  // construct the layout
221  TQVBoxLayout *l0 = new TQVBoxLayout(d->mainwidget_, 0, 0);
222  l0->addWidget(d->toolbar_, AlignTop);
223  if (d->gvpart_)
224  l0->addWidget(d->gvpart_->widget());
225 
226  resize(855, 500);
227  setCaption(i18n("Print Preview"));
228 }
229 
230 void KPrintPreview::openFile(const TQString& file)
231 {
232  d->gvpart_->openURL(KURL(file));
233 }
234 
235 bool KPrintPreview::isValid() const
236 {
237  return (d->gvpart_ != 0);
238 }
239 
240 bool KPrintPreview::preview(const TQString& file, bool previewOnly, WId parentId)
241 {
242  KMimeType::Ptr mime = KMimeType::findByPath( file );
243  bool isPS = ( mime->name() == "application/postscript" );
244  if ( !isPS )
245  kdDebug( 500 ) << "Previewing a non PostScript file, built-in preview disabled" << endl;
246 
247  TDEConfig *conf = KMFactory::self()->printConfig();
248  conf->setGroup("General");
249  KLibFactory *factory(0);
250  bool externalPreview = conf->readBoolEntry("ExternalPreview", false);
251  TQWidget *parentW = TQWidget::find(parentId);
252  TQString exe;
253  if (!externalPreview && isPS && (factory = componentFactory()) != 0)
254  {
255  KPrintPreview dlg(parentW, previewOnly);
256  dlg.initView(factory);
257 
258  if (dlg.isValid())
259  {
260  dlg.openFile(file);
261  return dlg.exec();
262  }
263  else
264  {
265  // do nothing at that point: try to use the other way around by
266  // using an external PS viewer if possible
267  }
268  }
269 
270  // Either the PS viewer component was not found, or an external
271  // preview program has been specified
272  KPreviewProc proc;
273  if (externalPreview && isPS )
274  {
275  exe = conf->readPathEntry("PreviewCommand", "gv");
276  if (TDEStandardDirs::findExe(exe).isEmpty())
277  {
278  TQString msg = i18n("The preview program %1 cannot be found. "
279  "Check that the program is correctly installed and "
280  "located in a directory included in your PATH "
281  "environment variable.").arg(exe);
282  return continuePrint(msg, parentW, previewOnly);
283  }
284  proc << exe << file;
285  }
286  else
287  {
288  KService::Ptr serv = KServiceTypeProfile::preferredService( mime->name(), TQString::null );
289  if ( serv )
290  {
291  KURL url;
292  url.setPath( file );
293  TQStringList args = KRun::processDesktopExec( *serv, url, false );
294  proc << args;
295  exe = serv->name();
296  }
297  else
298  {
299  // in that case, the PS viewer component could not be loaded and no service
300  // could be found to view PS
301  TQString msg;
302  if ( isPS )
303  msg = i18n("Preview failed: neither the internal TDE PostScript "
304  "viewer (KGhostView) nor any other external PostScript "
305  "viewer could be found.");
306  else
307  msg = i18n( "Preview failed: TDE could not find any application "
308  "to preview files of type %1." ).arg( mime->name() );
309 
310  return continuePrint(msg, parentW, previewOnly);
311  }
312  }
313 
314  // start the preview process
315  if (!proc.startPreview())
316  {
317  TQString msg = i18n("Preview failed: unable to start program %1.").arg(exe);
318  return continuePrint(msg, parentW, previewOnly);
319  }
320  else if (!previewOnly)
321  {
322  return (KMessageBox::questionYesNo(parentW, i18n("Do you want to continue printing?"), TQString::null, KGuiItem(i18n("Print"),"document-print"), KStdGuiItem::cancel(), "continuePrinting") == KMessageBox::Yes);
323  }
324  else
325  return false;
326 }
327 
328 #include "kprintpreview.moc"

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