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remotecontrol.cpp Example File
help/remotecontrol/remotecontrol.cpp

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 #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;
     QTextStream str(process);
     str << cmd << QLatin1Char('\0') << endl;
 }

 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);
 }