MainWindow.cc

    connect(ui.actionLiftoff, SIGNAL(triggered()), UASManager::instance(), SLOT(launchActiveUAS()));
    connect(ui.actionLand, SIGNAL(triggered()), UASManager::instance(), SLOT(returnActiveUAS()));
    connect(ui.actionEmergency_Land, SIGNAL(triggered()), UASManager::instance(), SLOT(stopActiveUAS()));
    connect(ui.actionEmergency_Kill, SIGNAL(triggered()), UASManager::instance(), SLOT(killActiveUAS()));
    connect(ui.actionShutdownMAV, SIGNAL(triggered()), UASManager::instance(), SLOT(shutdownActiveUAS()));
    connect(ui.actionConfiguration, SIGNAL(triggered()), UASManager::instance(), SLOT(configureActiveUAS()));

    // Views actions
    connect(ui.actionPilotsView, SIGNAL(triggered()), this, SLOT(loadPilotView()));
    connect(ui.actionEngineersView, SIGNAL(triggered()), this, SLOT(loadEngineerView()));
    connect(ui.actionOperatorsView, SIGNAL(triggered()), this, SLOT(loadOperatorView()));
    connect(ui.actionUnconnectedView, SIGNAL(triggered()), this, SLOT(loadUnconnectedView()));

    connect(ui.actionMavlinkView, SIGNAL(triggered()), this, SLOT(loadMAVLinkView()));
    connect(ui.actionReloadStylesheet, SIGNAL(triggered()), this, SLOT(reloadStylesheet()));
    connect(ui.actionSelectStylesheet, SIGNAL(triggered()), this, SLOT(selectStylesheet()));

    // Help Actions
    connect(ui.actionOnline_Documentation, SIGNAL(triggered()), this, SLOT(showHelp()));
    connect(ui.actionDeveloper_Credits, SIGNAL(triggered()), this, SLOT(showCredits()));
    connect(ui.actionProject_Roadmap_2, SIGNAL(triggered()), this, SLOT(showRoadMap()));

    // Custom widget actions
    connect(ui.actionNewCustomWidget, SIGNAL(triggered()), this, SLOT(createCustomWidget()));
    connect(ui.actionLoadCustomWidgetFile, SIGNAL(triggered()), this, SLOT(loadCustomWidget()));

    // Audio output
    ui.actionMuteAudioOutput->setChecked(GAudioOutput::instance()->isMuted());
    connect(GAudioOutput::instance(), SIGNAL(mutedChanged(bool)), ui.actionMuteAudioOutput, SLOT(setChecked(bool)));
    connect(ui.actionMuteAudioOutput, SIGNAL(triggered(bool)), GAudioOutput::instance(), SLOT(mute(bool)));

    // User interaction
    // NOTE: Joystick thread is not started and
    // configuration widget is not instantiated
    // unless it is actually used
    // so no ressources spend on this.
    ui.actionJoystickSettings->setVisible(true);

    // Configuration
    // Joystick
    connect(ui.actionJoystickSettings, SIGNAL(triggered()), this, SLOT(configure()));
    // Application Settings
    connect(ui.actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));
}

void MainWindow::showHelp()
{
    if(!QDesktopServices::openUrl(QUrl("http://qgroundcontrol.org/users/start"))) {
        QMessageBox msgBox;
        msgBox.setIcon(QMessageBox::Critical);
        msgBox.setText("Could not open help in browser");
        msgBox.setInformativeText("To get to the online help, please open http://qgroundcontrol.org/user_guide in a browser.");
        msgBox.setStandardButtons(QMessageBox::Ok);
        msgBox.setDefaultButton(QMessageBox::Ok);
        msgBox.exec();
    }
}

void MainWindow::showCredits()
{
    if(!QDesktopServices::openUrl(QUrl("http://qgroundcontrol.org/credits"))) {
        QMessageBox msgBox;
        msgBox.setIcon(QMessageBox::Critical);
        msgBox.setText("Could not open credits in browser");
        msgBox.setInformativeText("To get to the online help, please open http://qgroundcontrol.org/credits in a browser.");
        msgBox.setStandardButtons(QMessageBox::Ok);
        msgBox.setDefaultButton(QMessageBox::Ok);
        msgBox.exec();
    }
}

void MainWindow::showRoadMap()
{
    if(!QDesktopServices::openUrl(QUrl("http://qgroundcontrol.org/dev/roadmap"))) {
        QMessageBox msgBox;
        msgBox.setIcon(QMessageBox::Critical);
        msgBox.setText("Could not open roadmap in browser");
        msgBox.setInformativeText("To get to the online help, please open http://qgroundcontrol.org/roadmap in a browser.");
        msgBox.setStandardButtons(QMessageBox::Ok);
        msgBox.setDefaultButton(QMessageBox::Ok);
        msgBox.exec();
    }
}

void MainWindow::configure()
{
    if (!joystickWidget) {
        if (!joystick->isRunning()) {
            joystick->start();
        }
        joystickWidget = new JoystickWidget(joystick);
    }
    joystickWidget->show();
}

void MainWindow::showSettings()
{
    QGCSettingsWidget* settings = new QGCSettingsWidget(this);
    settings->show();
}

void MainWindow::addLink()
{
    SerialLink* link = new SerialLink();
    // TODO This should be only done in the dialog itself

    LinkManager::instance()->add(link);
    LinkManager::instance()->addProtocol(link, mavlink);

    // Go fishing for this link's configuration window
    QList<QAction*> actions = ui.menuNetwork->actions();

    foreach (QAction* act, actions) {
        if (act->data().toInt() == LinkManager::instance()->getLinks().indexOf(link)) {
            act->trigger();
            break;
        }
    }
}

void MainWindow::addLink(LinkInterface *link)
{
    // IMPORTANT! KEEP THESE TWO LINES
    // THEY MAKE SURE THE LINK IS PROPERLY REGISTERED
    // BEFORE LINKING THE UI AGAINST IT
    // Register (does nothing if already registered)
    LinkManager::instance()->add(link);
    LinkManager::instance()->addProtocol(link, mavlink);

    // Go fishing for this link's configuration window
    QList<QAction*> actions = ui.menuNetwork->actions();

    bool found = false;

    foreach (QAction* act, actions) {
        if (act->data().toInt() == LinkManager::instance()->getLinks().indexOf(link)) {
            found = true;
        }
    }

    UDPLink* udp = dynamic_cast<UDPLink*>(link);

    if (!found || udp) {
        CommConfigurationWindow* commWidget = new CommConfigurationWindow(link, mavlink, this);
        QAction* action = commWidget->getAction();
        ui.menuNetwork->addAction(action);

        // Error handling
        connect(link, SIGNAL(communicationError(QString,QString)), this, SLOT(showCriticalMessage(QString,QString)), Qt::QueuedConnection);
        // Special case for simulationlink
        MAVLinkSimulationLink* sim = dynamic_cast<MAVLinkSimulationLink*>(link);
        if (sim) {
            //connect(sim, SIGNAL(valueChanged(int,QString,double,quint64)), linechart, SLOT(appendData(int,QString,double,quint64)));
            connect(ui.actionSimulate, SIGNAL(triggered(bool)), sim, SLOT(connectLink(bool)));
        }
    }
}

void MainWindow::setActiveUAS(UASInterface* uas)
{
    // Enable and rename menu
    ui.menuUnmanned_System->setTitle(uas->getUASName());
    if (!ui.menuUnmanned_System->isEnabled()) ui.menuUnmanned_System->setEnabled(true);
}

void MainWindow::UASSpecsChanged(int uas)
{
    UASInterface* activeUAS = UASManager::instance()->getActiveUAS();
    if (activeUAS) {
        if (activeUAS->getUASID() == uas) {
            ui.menuUnmanned_System->setTitle(activeUAS->getUASName());
        }
    }
}

void MainWindow::UASCreated(UASInterface* uas)
{

    // Connect the UAS to the full user interface

    if (uas != NULL)
    {
        // The pilot, operator and engineer views were not available on startup, enable them now
        ui.actionPilotsView->setEnabled(true);
        ui.actionOperatorsView->setEnabled(true);
        ui.actionEngineersView->setEnabled(true);
        // The UAS actions are not enabled without connection to system
        ui.actionLiftoff->setEnabled(true);
        ui.actionLand->setEnabled(true);
        ui.actionEmergency_Kill->setEnabled(true);
        ui.actionEmergency_Land->setEnabled(true);
        ui.actionShutdownMAV->setEnabled(true);

        QIcon icon;
        // Set matching icon
        switch (uas->getSystemType()) {
        case 0:
            icon = QIcon(":/images/mavs/generic.svg");
            break;
        case 1:
            icon = QIcon(":/images/mavs/fixed-wing.svg");
            break;
        case 2:
            icon = QIcon(":/images/mavs/quadrotor.svg");
            break;
        case 3:
            icon = QIcon(":/images/mavs/coaxial.svg");
            break;
        case 4:
            icon = QIcon(":/images/mavs/helicopter.svg");
            break;
        case 5:
            icon = QIcon(":/images/mavs/groundstation.svg");
            break;
        default:
            icon = QIcon(":/images/mavs/unknown.svg");
            break;
        }

        QAction* uasAction = new QAction(icon, tr("Select %1 for control").arg(uas->getUASName()), ui.menuConnected_Systems);
        connect(uas, SIGNAL(systemRemoved()), uasAction, SLOT(deleteLater()));
        connect(uasAction, SIGNAL(triggered()), uas, SLOT(setSelected()));
        connect(uas, SIGNAL(systemSpecsChanged(int)), this, SLOT(UASSpecsChanged(int)));

        ui.menuConnected_Systems->addAction(uasAction);

        // FIXME Should be not inside the mainwindow
        if (debugConsoleDockWidget) {
            DebugConsole *debugConsole = dynamic_cast<DebugConsole*>(debugConsoleDockWidget->widget());
            if (debugConsole) {
                connect(uas, SIGNAL(textMessageReceived(int,int,int,QString)),
                        debugConsole, SLOT(receiveTextMessage(int,int,int,QString)));
            }
        }

        // Health / System status indicator
        if (infoDockWidget) {
            UASInfoWidget *infoWidget = dynamic_cast<UASInfoWidget*>(infoDockWidget->widget());
            if (infoWidget) {
                infoWidget->addUAS(uas);
            }
        }

        // UAS List
        if (listDockWidget) {
            UASListWidget *listWidget = dynamic_cast<UASListWidget*>(listDockWidget->widget());
            if (listWidget) {
                listWidget->addUAS(uas);
            }
        }

        // Line chart
        if (!linechartWidget)
        {
            // Center widgets
            linechartWidget   = new Linecharts(this);
            addCentralWidget(linechartWidget, tr("Realtime Plot"));
        }

        // Load default custom widgets for this autopilot type
        loadCustomWidgetsFromDefaults(uas->getSystemTypeString(uas->getSystemType()), uas->getAutopilotTypeString(uas->getAutopilotType()));



        // Change the view only if this is the first UAS

        // If this is the first connected UAS, it is both created as well as
        // the currently active UAS
        if (UASManager::instance()->getUASList().size() == 1)
        {
            // Load last view if setting is present
            if (settings.contains("CURRENT_VIEW_WITH_UAS_CONNECTED"))
            {
                int view = settings.value("CURRENT_VIEW_WITH_UAS_CONNECTED").toInt();
                switch (view) {
                case VIEW_ENGINEER:
                    loadEngineerView();
                    break;
                case VIEW_MAVLINK:
                    loadMAVLinkView();
                    break;
                case VIEW_PILOT:
                    loadPilotView();
                    break;
                case VIEW_UNCONNECTED:
                    loadUnconnectedView();
                    break;
                case VIEW_OPERATOR:
                default:
                    loadOperatorView();
                    break;
                }
            }
            else
            {
                loadOperatorView();
            }
        }

    }

    if (!ui.menuConnected_Systems->isEnabled()) ui.menuConnected_Systems->setEnabled(true);

    // Restore the mainwindow size
    if (settings.contains(getWindowGeometryKey()))
    {
        restoreGeometry(settings.value(getWindowGeometryKey()).toByteArray());
    }
}

/**
 * Stores the current view state
 */
void MainWindow::storeViewState()
{
    // Save current state
    settings.setValue(getWindowStateKey(), saveState(QGC::applicationVersion()));
    settings.setValue(getWindowStateKey()+"CENTER_WIDGET", centerStack->currentIndex());
    // Although we want save the state of the window, we do not want to change the top-leve state (minimized, maximized, etc)
    // therefore this state is stored here and restored after applying the rest of the settings in the new
    // perspective.
    windowStateVal = this->windowState();
    settings.setValue(getWindowGeometryKey(), saveGeometry());
}

void MainWindow::loadViewState()
{
    // Restore center stack state
    int index = settings.value(getWindowStateKey()+"CENTER_WIDGET", centerStack->currentIndex()).toInt();
    // The offline plot view is usually the consequence of a logging run, always show the realtime view first
    if (centerStack->indexOf(dataplotWidget) == index)
    {
        // Rewrite to realtime plot
        index = centerStack->indexOf(linechartWidget);
    }
    if (index != -1) centerStack->setCurrentIndex(index);

    // Restore the widget positions and size
    if (settings.contains(getWindowStateKey()))
    {
        restoreState(settings.value(getWindowStateKey()).toByteArray(), QGC::applicationVersion());
    }
}

void MainWindow::loadEngineerView()
{
    if (currentView != VIEW_ENGINEER) {
        storeViewState();
        currentView = VIEW_ENGINEER;
        ui.actionEngineersView->setChecked(true);
        loadViewState();
    }
}

void MainWindow::loadOperatorView()
{
    if (currentView != VIEW_OPERATOR) {
        storeViewState();
        currentView = VIEW_OPERATOR;
        ui.actionOperatorsView->setChecked(true);
        loadViewState();
    }
}

void MainWindow::loadUnconnectedView()
{
    if (currentView != VIEW_UNCONNECTED)
    {
        storeViewState();
        currentView = VIEW_UNCONNECTED;
        ui.actionUnconnectedView->setChecked(true);
        loadViewState();
    }
}

void MainWindow::loadPilotView()
{
    if (currentView != VIEW_PILOT)
    {
        storeViewState();
        currentView = VIEW_PILOT;
        ui.actionPilotsView->setChecked(true);
        loadViewState();
    }
}

void MainWindow::loadMAVLinkView()
{
    if (currentView != VIEW_MAVLINK)
    {
        storeViewState();
        currentView = VIEW_MAVLINK;
        ui.actionMavlinkView->setChecked(true);
        loadViewState();
    }
}

void MainWindow::loadDataView(QString fileName)
{
    // Plot is now selected, now load data from file
    if (dataplotWidget)
    {
        dataplotWidget->loadFile(fileName);
    }
    QStackedWidget *centerStack = dynamic_cast<QStackedWidget*>(centralWidget());
    if (centerStack)
    {
        centerStack->setCurrentWidget(dataplotWidget);
        dataplotWidget->loadFile(fileName);
    }
}