|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# assistant.cpp Example File
help/simpletextviewer/assistant.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2007-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License versions 2.0 or 3.0 as published by the Free Software
     ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
     ** included in the packaging of this file.  Alternatively you may (at
     ** your option) use any later version of the GNU General Public
     ** License if such license has been publicly approved by Trolltech ASA
     ** (or its successors, if any) and the KDE Free Qt Foundation. In
     ** addition, as a special exception, Trolltech gives you certain
     ** additional rights. These rights are described in the Trolltech GPL
     ** Exception version 1.2, which can be found at
     ** http://www.trolltech.com/products/qt/gplexception/ and in the file
     ** GPL_EXCEPTION.txt in this package.
     **
     ** Please review the following information to ensure GNU General
     ** Public Licensing requirements will be met:
     ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
     ** you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
     ** or contact the sales department at sales@trolltech.com.
     **
     ** In addition, as a special exception, Trolltech, as the sole
     ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
     ** Integration plug-in the right for the Qt/Eclipse Integration to
     ** link to functionality provided by Qt Designer and its related
     ** libraries.
     **
     ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
     ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
     ** granted herein.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #include <QtCore/QProcess>
     #include <QtCore/QTextStream>
     #include <QtCore/QLibraryInfo>
     #include <QtCore/QDir>
     #include <QtGui/QMessageBox>

     #include "assistant.h"

     Assistant::Assistant()
         : proc(0)
     {
     }

     Assistant::~Assistant()
     {
         if (proc && proc->state() == QProcess::Running) {
             proc->terminate();
             proc->waitForFinished(3000);
         }
     }

     void Assistant::showDocumentation(const QString &page)
     {
         if (!startAssistant())
             return;
         QTextStream str(proc);
         str << QLatin1String("SetSource qthelp://com.trolltech.examples.simpletextviewer/doc/")
             << page << QLatin1Char('\0') << endl;
     }

     bool Assistant::startAssistant()
     {
         if (!proc)
             proc = new QProcess();

         if (proc->state() != QProcess::Running) {
             QString app = QLibraryInfo::location(QLibraryInfo::BinariesPath) + QDir::separator();
     #if !defined(Q_OS_MAC)
             app += QLatin1String("assistant");
     #else
             app += QLatin1String("Assistant.app/Contents/MacOS/Assistant");
     #endif

             QStringList args;
             args << QLatin1String("-collectionFile")
                 << QLibraryInfo::location(QLibraryInfo::ExamplesPath)
                 + QLatin1String("/help/simpletextviewer/documentation/simpletextviewer.qhc")
                 << QLatin1String("-enableRemoteControl");

             proc->start(app, args);

             if (!proc->waitForStarted()) {
                 QMessageBox::critical(0, QObject::tr("Simple Text Viewer"),
                     QObject::tr("Unable to launch Qt Assistant (%1)").arg(app));
                 return false;
             }
         }
         return true;
     }