remotecontrol.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2015 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

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

 #include <QtGui/QMessageBox>

 #include "remotecontrol.h"

 RemoteControl::RemoteControl(QWidget *parent, Qt::WFlags flags)
         : QMainWindow(parent, flags)
 {
     ui.setupUi(this);
     connect(ui.indexLineEdit, SIGNAL(returnPressed()),
         this, SLOT(on_indexButton_clicked()));
     connect(ui.identifierLineEdit, SIGNAL(returnPressed()),
         this, SLOT(on_identifierButton_clicked()));
     connect(ui.urlLineEdit, SIGNAL(returnPressed()),
         this, SLOT(on_urlButton_clicked()));

     QString rc;
     QTextStream(&rc) << QLatin1String("qthelp://com.trolltech.qt.")
                      << (QT_VERSION >> 16) << ((QT_VERSION >> 8) & 0xFF)
                      << (QT_VERSION & 0xFF)
                      << QLatin1String("/qdoc/index.html");

     ui.startUrlLineEdit->setText(rc);

     process = new QProcess(this);
     connect(process, SIGNAL(finished(int,QProcess::ExitStatus)),
         this, SLOT(helpViewerClosed()));
 }

 RemoteControl::~RemoteControl()
 {
     if (process->state() == QProcess::Running) {
         process->terminate();
         process->waitForFinished(3000);
     }
 }

 void RemoteControl::on_actionQuit_triggered()
 {
     close();
 }

 void RemoteControl::on_launchButton_clicked()
 {
     if (process->state() == QProcess::Running)
         return;

     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

     ui.contentsCheckBox->setChecked(true);
     ui.indexCheckBox->setChecked(true);
     ui.bookmarksCheckBox->setChecked(true);

     QStringList args;
     args << QLatin1String("-enableRemoteControl");
     process->start(app, args);
     if (!process->waitForStarted()) {
         QMessageBox::critical(this, tr("Remote Control"),
             tr("Could not start Qt Assistant from %1.").arg(app));
         return;
     }

     if (!ui.startUrlLineEdit->text().isEmpty())
         sendCommand(QLatin1String("SetSource ")
             + ui.startUrlLineEdit->text());

     ui.launchButton->setEnabled(false);
     ui.startUrlLineEdit->setEnabled(false);
     ui.actionGroupBox->setEnabled(true);
 }

 void RemoteControl::sendCommand(const QString &cmd)
 {
     if (process->state() != QProcess::Running)
         return;
     process->write(cmd.toLocal8Bit() + '\n');
 }

 void RemoteControl::on_indexButton_clicked()
 {
     sendCommand(QLatin1String("ActivateKeyword ")
         + ui.indexLineEdit->text());
 }

 void RemoteControl::on_identifierButton_clicked()
 {
     sendCommand(QLatin1String("ActivateIdentifier ")
         + ui.identifierLineEdit->text());
 }

 void RemoteControl::on_urlButton_clicked()
 {
     sendCommand(QLatin1String("SetSource ")
         + ui.urlLineEdit->text());
 }

 void RemoteControl::on_syncContentsButton_clicked()
 {
     sendCommand(QLatin1String("SyncContents"));
 }

 void RemoteControl::on_contentsCheckBox_toggled(bool checked)
 {
     sendCommand(checked ?
         QLatin1String("Show Contents") : QLatin1String("Hide Contents"));
 }

 void RemoteControl::on_indexCheckBox_toggled(bool checked)
 {
     sendCommand(checked ?
         QLatin1String("Show Index") : QLatin1String("Hide Index"));
 }

 void RemoteControl::on_bookmarksCheckBox_toggled(bool checked)
 {
     sendCommand(checked ?
         QLatin1String("Show Bookmarks") : QLatin1String("Hide Bookmarks"));
 }

 void RemoteControl::helpViewerClosed()
 {
     ui.launchButton->setEnabled(true);
     ui.startUrlLineEdit->setEnabled(true);
     ui.actionGroupBox->setEnabled(false);
 }