MainWindow.cc

/*=====================================================================

QGroundControl Open Source Ground Control Station

(c) 2009 - 2011 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>

This file is part of the QGROUNDCONTROL project

    QGROUNDCONTROL is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    QGROUNDCONTROL is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with QGROUNDCONTROL. If not, see <http://www.gnu.org/licenses/>.

======================================================================*/

/**
 * @file
 *   @brief Implementation of class MainWindow
 *   @author Lorenz Meier <mail@qgroundcontrol.org>
 */

#include <QSettings>
#include <QDockWidget>
#include <QNetworkInterface>
#include <QMessageBox>
#include <QDebug>
#include <QTimer>
#include <QHostInfo>

#include "QGC.h"
#include "MAVLinkSimulationLink.h"
#include "SerialLink.h"
#include "UDPLink.h"
#include "MAVLinkProtocol.h"
#include "CommConfigurationWindow.h"
#include "QGCWaypointListMulti.h"
#include "MainWindow.h"
#include "JoystickWidget.h"
#include "GAudioOutput.h"
#include "QGCToolWidget.h"
#include "QGCMAVLinkLogPlayer.h"
#include "QGCSettingsWidget.h"
#include "QGCMapTool.h"

#ifdef QGC_OSG_ENABLED
#include "Q3DWidgetFactory.h"
#endif

// FIXME Move
#include "PxQuadMAV.h"
#include "SlugsMAV.h"


#include "LogCompressor.h"

MainWindow* MainWindow::instance()
{
    static MainWindow* _instance = 0;
    if(_instance == 0)
    {
        _instance = new MainWindow();

        /* Set the application as parent to ensure that this object
                 * will be destroyed when the main application exits */
        //_instance->setParent(qApp);
    }
    return _instance;
}

/**
* Create new mainwindow. The constructor instantiates all parts of the user
* interface. It does NOT show the mainwindow. To display it, call the show()
* method.
*
* @see QMainWindow::show()
**/
MainWindow::MainWindow(QWidget *parent):
    QMainWindow(parent),
    toolsMenuActions(),
    currentView(VIEW_UNCONNECTED),
    aboutToCloseFlag(false),
    changingViewsFlag(false),
    styleFileName(QCoreApplication::applicationDirPath() + "/style-indoor.css"),
    autoReconnect(false),
    currentStyle(QGC_MAINWINDOW_STYLE_INDOOR),
    lowPowerMode(false),
    centerStackActionGroup(this)
{
    hide();
    loadSettings();
    if (!settings.contains("CURRENT_VIEW"))
    {
        // Set this view as default view
        settings.setValue("CURRENT_VIEW", currentView);
    }
    else
    {
        // LOAD THE LAST VIEW
        VIEW_SECTIONS currentViewCandidate = (VIEW_SECTIONS) settings.value("CURRENT_VIEW", currentView).toInt();
        if (currentViewCandidate != VIEW_ENGINEER &&
                currentViewCandidate != VIEW_OPERATOR &&
                currentViewCandidate != VIEW_PILOT &&
                currentViewCandidate != VIEW_FULL)
        {
            currentView = currentViewCandidate;
        }
    }

    setDefaultSettingsForAp();

    settings.sync();

    // Setup UI state machines
    centerStackActionGroup.setExclusive(true);

    // Setup user interface
    ui.setupUi(this);

    centerStack = new QStackedWidget(this);
    setCentralWidget(centerStack);

    // Load Toolbar
    toolBar = new QGCToolBar(this);
    this->addToolBar(toolBar);
    // Add actions
    toolBar->addPerspectiveChangeAction(ui.actionOperatorsView);
    toolBar->addPerspectiveChangeAction(ui.actionEngineersView);
    toolBar->addPerspectiveChangeAction(ui.actionPilotsView);
//    toolBar->addPerspectiveChangeAction(ui.actionUnconnectedView);

    buildCommonWidgets();
    connectCommonWidgets();

    configureWindowName();

    loadStyle(currentStyle);

    // Create actions
    connectCommonActions();

    // Set dock options
    setDockOptions(AnimatedDocks | AllowTabbedDocks | AllowNestedDocks);

    // Load mavlink view as default widget set
    //loadMAVLinkView();

    statusBar()->setSizeGripEnabled(true);

    // Restore the window setup
    if (settings.contains(getWindowStateKey()))
    {
        loadViewState();
    }

    // Restore the window position and size
    if (settings.contains(getWindowGeometryKey()))
    {
        // Restore the window geometry
        restoreGeometry(settings.value(getWindowGeometryKey()).toByteArray());
    }
    else
    {
        // Adjust the size
        adjustSize();
    }

    // Populate link menu
    QList<LinkInterface*> links = LinkManager::instance()->getLinks();
    foreach(LinkInterface* link, links)
    {
        this->addLink(link);
    }

    connect(LinkManager::instance(), SIGNAL(newLink(LinkInterface*)), this, SLOT(addLink(LinkInterface*)));

    // Connect user interface devices
    joystickWidget = 0;
    joystick = new JoystickInput();

    // Connect flighgear test link
    // FIXME MOVE INTO UAV OBJECT
    fgLink = new QGCFlightGearLink();
    fgLink->connectSimulation();

    // Connect link
    if (autoReconnect)
    {
        SerialLink* link = new SerialLink();
        // Add to registry
        LinkManager::instance()->add(link);
        LinkManager::instance()->addProtocol(link, mavlink);
        link->connect();
    }

    // Set low power mode
    enableLowPowerMode(lowPowerMode);

    // Initialize window state
    windowStateVal = windowState();

    show();
}

MainWindow::~MainWindow()
{
    delete mavlink;
    delete joystick;

    // Get and delete all dockwidgets and contained
    // widgets
    QObjectList childList( this->children() );

    QObjectList::iterator i;
    QDockWidget* dockWidget;
    for (i = childList.begin(); i != childList.end(); ++i)
    {
        dockWidget = dynamic_cast<QDockWidget*>(*i);
        if (dockWidget)
        {
            // Remove dock widget from main window
            removeDockWidget(dockWidget);
            delete dockWidget->widget();
            delete dockWidget;
        }
        else
        {
            delete dynamic_cast<QObject*>(*i);
        }
    }

    // Delete all UAS objects
}

/**
 * Set default settings for this AP type.
 */
void MainWindow::setDefaultSettingsForAp()
{
    // Check if the settings exist, instantiate defaults if necessary


//    // UNCONNECTED VIEW DEFAULT
////    QString centralKey = buildMenuKey(SUB_SECTION_CHECKED, CENTRAL_MAP, VIEW_UNCONNECTED);
//    if (!settings.contains(centralKey)) {
//        settings.setValue(centralKey,true);

//        // ENABLE UAS LIST
////        settings.setValue(buildMenuKey(SUB_SECTION_CHECKED,MainWindow::MENU_UAS_LIST, VIEW_UNCONNECTED), true);
//        // ENABLE COMMUNICATION CONSOLE
////        settings.setValue(buildMenuKey(SUB_SECTION_CHECKED,MainWindow::MENU_DEBUG_CONSOLE, VIEW_UNCONNECTED), true);
//    }

//    // OPERATOR VIEW DEFAULT
////    centralKey = buildMenuKey(SUB_SECTION_CHECKED, CENTRAL_MAP, VIEW_OPERATOR);
//    if (!settings.contains(centralKey)) {
////        settings.setValue(centralKey,true);

//        // ENABLE UAS LIST
////        settings.setValue(buildMenuKey(SUB_SECTION_CHECKED,MainWindow::MENU_UAS_LIST,VIEW_OPERATOR), true);
//        // ENABLE HUD TOOL WIDGET
////        settings.setValue(buildMenuKey(SUB_SECTION_CHECKED,MainWindow::MENU_HUD,VIEW_OPERATOR), true);
//        // ENABLE WAYPOINTS
////        settings.setValue(buildMenuKey(SUB_SECTION_CHECKED,MainWindow::MENU_WAYPOINTS,VIEW_OPERATOR), true);
//    }

//    // ENGINEER VIEW DEFAULT
//    centralKey = buildMenuKey(SUB_SECTION_CHECKED, CENTRAL_LINECHART, VIEW_ENGINEER);
//    if (!settings.contains(centralKey)) {
//        settings.setValue(centralKey,true);
//        // Enable Parameter widget
//        settings.setValue(buildMenuKey(SUB_SECTION_CHECKED,MainWindow::MENU_PARAMETERS,VIEW_ENGINEER), true);
//    }

//    // MAVLINK VIEW DEFAULT
//    centralKey = buildMenuKey(SUB_SECTION_CHECKED, CENTRAL_PROTOCOL, VIEW_MAVLINK);
//    if (!settings.contains(centralKey)) {
//        settings.setValue(centralKey,true);
//    }

//    // PILOT VIEW DEFAULT
//    centralKey = buildMenuKey(SUB_SECTION_CHECKED, CENTRAL_HUD, VIEW_PILOT);
//    if (!settings.contains(centralKey)) {
//        settings.setValue(centralKey,true);
//        // Enable Flight display
//        settings.setValue(buildMenuKey(SUB_SECTION_CHECKED,MainWindow::MENU_HDD_1,VIEW_PILOT), true);
//    }
}

void MainWindow::resizeEvent(QResizeEvent * event)
{
    if (height() < 800)
    {
        ui.statusBar->setVisible(false);
    }
    else
    {
        ui.statusBar->setVisible(true);
        ui.statusBar->setSizeGripEnabled(true);
    }

    if (width() > 1200)
    {
        toolBar->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
    }
    else
    {
        toolBar->setToolButtonStyle(Qt::ToolButtonIconOnly);
    }

    QMainWindow::resizeEvent(event);
}

QString MainWindow::getWindowStateKey()
{
    return QString::number(currentView)+"_windowstate";
}

QString MainWindow::getWindowGeometryKey()
{
    //return QString::number(currentView)+"_geometry";
    return "_geometry";
}

void MainWindow::buildCustomWidget()
{
    // Show custom widgets only if UAS is connected
    if (UASManager::instance()->getActiveUAS() != NULL)
    {
        // Create custom widgets
        QList<QGCToolWidget*> widgets = QGCToolWidget::createWidgetsFromSettings(this);

        if (widgets.size() > 0)
        {
            ui.menuTools->addSeparator();
        }

        for(int i = 0; i < widgets.size(); ++i)
        {
            // Check if this widget already has a parent, do not create it in this case
            QGCToolWidget* tool = widgets.at(i);
            QDockWidget* dock = dynamic_cast<QDockWidget*>(tool->parentWidget());
            if (!dock)
            {
                QDockWidget* dock = new QDockWidget(tool->windowTitle(), this);
                dock->setObjectName(tool->objectName()+"_DOCK");
                dock->setWidget(tool);
                connect(tool, SIGNAL(destroyed()), dock, SLOT(deleteLater()));
                QAction* showAction = new QAction(widgets.at(i)->windowTitle(), this);
                showAction->setCheckable(true);
                connect(showAction, SIGNAL(triggered(bool)), dock, SLOT(setVisible(bool)));
                connect(dock, SIGNAL(visibilityChanged(bool)), showAction, SLOT(setChecked(bool)));
                widgets.at(i)->setMainMenuAction(showAction);
                ui.menuTools->addAction(showAction);

                // Load dock widget location (default is bottom)
                Qt::DockWidgetArea location = static_cast <Qt::DockWidgetArea>(tool->getDockWidgetArea(currentView));

                addDockWidget(location, dock);
            }
        }
    }
}

void MainWindow::buildCommonWidgets()
{
    //TODO:  move protocol outside UI
    mavlink     = new MAVLinkProtocol();
    connect(mavlink, SIGNAL(protocolStatusMessage(QString,QString)), this, SLOT(showCriticalMessage(QString,QString)), Qt::QueuedConnection);

    // Dock widgets
    if (!controlDockWidget)
    {
        controlDockWidget = new QDockWidget(tr("Control"), this);
        controlDockWidget->setObjectName("UNMANNED_SYSTEM_CONTROL_DOCKWIDGET");
        controlDockWidget->setWidget( new UASControlWidget(this) );
        addTool(controlDockWidget, tr("Control"), Qt::LeftDockWidgetArea);
    }

    if (!listDockWidget)
    {
        listDockWidget = new QDockWidget(tr("Unmanned Systems"), this);
        listDockWidget->setWidget( new UASListWidget(this) );
        listDockWidget->setObjectName("UNMANNED_SYSTEMS_LIST_DOCKWIDGET");
        addTool(listDockWidget, tr("Unmanned Systems"), Qt::RightDockWidgetArea);
    }

    if (!waypointsDockWidget)
    {
        waypointsDockWidget = new QDockWidget(tr("Mission Plan"), this);
        waypointsDockWidget->setWidget( new QGCWaypointListMulti(this) );
        waypointsDockWidget->setObjectName("WAYPOINT_LIST_DOCKWIDGET");
        addTool(waypointsDockWidget, tr("Mission Plan"), Qt::BottomDockWidgetArea);
    }

    if (!infoDockWidget)
    {
        infoDockWidget = new QDockWidget(tr("Status Details"), this);
        infoDockWidget->setWidget( new UASInfoWidget(this) );
        infoDockWidget->setObjectName("UAS_STATUS_DETAILS_DOCKWIDGET");
        addTool(infoDockWidget, tr("Status Details"), Qt::RightDockWidgetArea);
    }

    if (!debugConsoleDockWidget)
    {
        debugConsoleDockWidget = new QDockWidget(tr("Communication Console"), this);
        debugConsoleDockWidget->setWidget( new DebugConsole(this) );
        debugConsoleDockWidget->setObjectName("COMMUNICATION_DEBUG_CONSOLE_DOCKWIDGET");
        addTool(debugConsoleDockWidget, tr("Communication Console"), Qt::BottomDockWidgetArea);
    }

    if (!logPlayerDockWidget)
    {
        logPlayerDockWidget = new QDockWidget(tr("MAVLink Log Player"), this);
        logPlayer = new QGCMAVLinkLogPlayer(mavlink, this);
        toolBar->setLogPlayer(logPlayer);
        logPlayerDockWidget->setWidget(logPlayer);
        logPlayerDockWidget->setObjectName("MAVLINK_LOG_PLAYER_DOCKWIDGET");
        addTool(logPlayerDockWidget, tr("MAVLink Log Replay"), Qt::RightDockWidgetArea);
    }

    // Center widgets
    if (!mapWidget)
    {
        mapWidget = new QGCMapTool(this);
        addCentralWidget(mapWidget, "Maps");
    }

    if (!protocolWidget)
    {
        protocolWidget    = new XMLCommProtocolWidget(this);
        addCentralWidget(protocolWidget, "Mavlink Generator");
    }

    if (!dataplotWidget)
    {
        dataplotWidget    = new QGCDataPlot2D(this);
        addCentralWidget(dataplotWidget, "Logfile Plot");
    }

    //FIXME: memory of acceptList will never be freed again
    QStringList* acceptList = new QStringList();
    acceptList->append("-105,roll deg,deg,+105,s");
    acceptList->append("-105,pitch deg,deg,+105,s");
    acceptList->append("-105,heading deg,deg,+105,s");

    acceptList->append("-60,rollspeed d/s,deg/s,+60,s");
    acceptList->append("-60,pitchspeed d/s,deg/s,+60,s");
    acceptList->append("-60,yawspeed d/s,deg/s,+60,s");
    acceptList->append("0,airspeed,m/s,30");
    acceptList->append("0,groundspeed,m/s,30");
    acceptList->append("0,climbrate,m/s,30");
    acceptList->append("0,throttle,%,100");

    //FIXME: memory of acceptList2 will never be freed again
    QStringList* acceptList2 = new QStringList();
    acceptList2->append("900,servo #1,us,2100,s");
    acceptList2->append("900,servo #2,us,2100,s");
    acceptList2->append("900,servo #3,us,2100,s");
    acceptList2->append("900,servo #4,us,2100,s");
    acceptList2->append("900,servo #5,us,2100,s");
    acceptList2->append("900,servo #6,us,2100,s");
    acceptList2->append("900,servo #7,us,2100,s");
    acceptList2->append("900,servo #8,us,2100,s");
    acceptList2->append("0,abs pressure,hPa,65500");
    //acceptList2->append("-2048,accel. x,raw,2048,s");
    //acceptList2->append("-2048,accel. y,raw,2048,s");
    //acceptList2->append("-2048,accel. z,raw,2048,s");

    if (!hudWidget) {
        hudWidget         = new HUD(320, 240, this);
        addCentralWidget(hudWidget, tr("Head Up Display"));
    }

    if (!dataplotWidget) {
        dataplotWidget    = new QGCDataPlot2D(this);
        addCentralWidget(dataplotWidget, tr("Logfile Plot"));
    }

#ifdef QGC_OSG_ENABLED
    if (!_3DWidget) {
        _3DWidget         = Q3DWidgetFactory::get("PIXHAWK");
        addCentralWidget(_3DWidget, tr("Local 3D"));
    }
#endif

#if (defined _MSC_VER) | (defined Q_OS_MAC)
    if (!gEarthWidget) {
        gEarthWidget = new QGCGoogleEarthView(this);
        addCentralWidget(gEarthWidget, tr("Google Earth"));
    }

#endif

    // Dock widgets

    if (!detectionDockWidget) {
        detectionDockWidget = new QDockWidget(tr("Object Recognition"), this);
        detectionDockWidget->setWidget( new ObjectDetectionView("images/patterns", this) );
        detectionDockWidget->setObjectName("OBJECT_DETECTION_DOCK_WIDGET");
        addTool(detectionDockWidget, tr("Object Recognition"), Qt::RightDockWidgetArea);
    }

    if (!parametersDockWidget) {
        parametersDockWidget = new QDockWidget(tr("Calibration and Onboard Parameters"), this);
        parametersDockWidget->setWidget( new ParameterInterface(this) );
        parametersDockWidget->setObjectName("PARAMETER_INTERFACE_DOCKWIDGET");
        addTool(parametersDockWidget, tr("Calibration and Parameters"), Qt::RightDockWidgetArea);
    }

    if (!watchdogControlDockWidget) {
        watchdogControlDockWidget = new QDockWidget(tr("Process Control"), this);
        watchdogControlDockWidget->setWidget( new WatchdogControl(this) );
        watchdogControlDockWidget->setObjectName("WATCHDOG_CONTROL_DOCKWIDGET");
        addTool(watchdogControlDockWidget, tr("Process Control"), Qt::BottomDockWidgetArea);
    }

    if (!hsiDockWidget) {
        hsiDockWidget = new QDockWidget(tr("Horizontal Situation Indicator"), this);
        hsiDockWidget->setWidget( new HSIDisplay(this) );
        hsiDockWidget->setObjectName("HORIZONTAL_SITUATION_INDICATOR_DOCK_WIDGET");
        addTool(hsiDockWidget, tr("Horizontal Situation"), Qt::BottomDockWidgetArea);
    }

    if (!headDown1DockWidget) {
        headDown1DockWidget = new QDockWidget(tr("Flight Display"), this);
        headDown1DockWidget->setWidget( new HDDisplay(acceptList, "Flight Display", this) );
        headDown1DockWidget->setObjectName("HEAD_DOWN_DISPLAY_1_DOCK_WIDGET");
        addTool(headDown1DockWidget, tr("Flight Display"), Qt::RightDockWidgetArea);
    }

    if (!headDown2DockWidget) {
        headDown2DockWidget = new QDockWidget(tr("Actuator Status"), this);
        headDown2DockWidget->setWidget( new HDDisplay(acceptList2, "Actuator Status", this) );
        headDown2DockWidget->setObjectName("HEAD_DOWN_DISPLAY_2_DOCK_WIDGET");
        addTool(headDown2DockWidget, tr("Actuator Status"), Qt::RightDockWidgetArea);
    }

    if (!rcViewDockWidget) {
        rcViewDockWidget = new QDockWidget(tr("Radio Control"), this);
        rcViewDockWidget->setWidget( new QGCRemoteControlView(this) );
        rcViewDockWidget->setObjectName("RADIO_CONTROL_CHANNELS_DOCK_WIDGET");
        addTool(rcViewDockWidget, tr("Radio Control"), Qt::BottomDockWidgetArea);
    }

    if (!headUpDockWidget) {
        headUpDockWidget = new QDockWidget(tr("HUD"), this);
        headUpDockWidget->setWidget( new HUD(320, 240, this));
        headUpDockWidget->setObjectName("HEAD_UP_DISPLAY_DOCK_WIDGET");
        addTool(headUpDockWidget, tr("Head Up Display"), Qt::RightDockWidgetArea);
    }

    if (!video1DockWidget) {
        video1DockWidget = new QDockWidget(tr("Video Stream 1"), this);
        HUD* video1 =  new HUD(160, 120, this);
        video1->enableHUDInstruments(false);
        video1->enableVideo(true);
        // FIXME select video stream as well
        video1DockWidget->setWidget(video1);
        video1DockWidget->setObjectName("VIDEO_STREAM_1_DOCK_WIDGET");
        addTool(video1DockWidget, tr("Video Stream 1"), Qt::LeftDockWidgetArea);
    }

    if (!video2DockWidget) {
        video2DockWidget = new QDockWidget(tr("Video Stream 2"), this);
        HUD* video2 =  new HUD(160, 120, this);
        video2->enableHUDInstruments(false);
        video2->enableVideo(true);
        // FIXME select video stream as well
        video2DockWidget->setWidget(video2);
        video2DockWidget->setObjectName("VIDEO_STREAM_2_DOCK_WIDGET");
        addTool(video2DockWidget, tr("Video Stream 2"), Qt::LeftDockWidgetArea);
    }

    // Custom widgets, added last to all menus and layouts
    buildCustomWidget();

    // Dialogue widgets
    //FIXME: free memory in destructor

}

void MainWindow::addTool(QDockWidget* widget, const QString& title, Qt::DockWidgetArea area)
{
    QAction* tempAction = ui.menuTools->addAction(title);

    tempAction->setCheckable(true);
    QVariant var;
    var.setValue((QWidget*)widget);
    tempAction->setData(var);
    connect(tempAction,SIGNAL(triggered(bool)),this, SLOT(showTool(bool)));
    connect(widget, SIGNAL(visibilityChanged(bool)), tempAction, SLOT(setChecked(bool)));
    tempAction->setChecked(widget->isVisible());
    addDockWidget(area, widget);
}


void MainWindow::showTool(bool show)
{
    QAction* act = qobject_cast<QAction *>(sender());
    QWidget* widget = qVariantValue<QWidget *>(act->data());
    widget->setVisible(show);
}

void MainWindow::addCentralWidget(QWidget* widget, const QString& title)
{
    // Check if this widget already has been added
    if (centerStack->indexOf(widget) == -1)
    {
        centerStack->addWidget(widget);

        QAction* tempAction = ui.menuMain->addAction(title);

        tempAction->setCheckable(true);
        QVariant var;
        var.setValue((QWidget*)widget);
        tempAction->setData(var);
        centerStackActionGroup.addAction(tempAction);
        connect(tempAction,SIGNAL(triggered()),this, SLOT(showCentralWidget()));
        connect(widget, SIGNAL(visibilityChanged(bool)), tempAction, SLOT(setChecked(bool)));
        tempAction->setChecked(widget->isVisible());
    }
}


void MainWindow::showCentralWidget()
{
    QAction* act = qobject_cast<QAction *>(sender());
    QWidget* widget = qVariantValue<QWidget *>(act->data());
    centerStack->setCurrentWidget(widget);
}

void MainWindow::closeEvent(QCloseEvent *event)
{
    if (isVisible()) storeViewState();
    storeSettings();
    aboutToCloseFlag = true;
    mavlink->storeSettings();
    UASManager::instance()->storeSettings();
    QMainWindow::closeEvent(event);
}

/**
 * Connect the signals and slots of the common window widgets
 */
void MainWindow::connectCommonWidgets()
{
    if (infoDockWidget && infoDockWidget->widget()) {
        connect(mavlink, SIGNAL(receiveLossChanged(int, float)),
                infoDockWidget->widget(), SLOT(updateSendLoss(int, float)));
    }
//    //TODO temporaly debug
//    if (slugsHilSimWidget && slugsHilSimWidget->widget()) {
//        connect(UASManager::instance(), SIGNAL(activeUASSet(UASInterface*)),
//                slugsHilSimWidget->widget(), SLOT(activeUasSet(UASInterface*)));
//    }
}

void MainWindow::createCustomWidget()
{
    QDockWidget* dock = new QDockWidget("Unnamed Tool", this);
    QGCToolWidget* tool = new QGCToolWidget("Unnamed Tool", dock);

    if (QGCToolWidget::instances()->size() < 2) {
        // This is the first widget
        ui.menuTools->addSeparator();
    }

    connect(tool, SIGNAL(destroyed()), dock, SLOT(deleteLater()));
    dock->setWidget(tool);

    QAction* showAction = new QAction(tool->getTitle(), this);
    showAction->setCheckable(true);
    connect(dock, SIGNAL(visibilityChanged(bool)), showAction, SLOT(setChecked(bool)));
    connect(showAction, SIGNAL(triggered(bool)), dock, SLOT(setVisible(bool)));
    tool->setMainMenuAction(showAction);
    ui.menuTools->addAction(showAction);
    this->addDockWidget(Qt::BottomDockWidgetArea, dock);
    dock->setVisible(true);
}

void MainWindow::loadCustomWidget()
{
    QString widgetFileExtension(".qgw");
    QString fileName = QFileDialog::getOpenFileName(this, tr("Specify Widget File Name"), QDesktopServices::storageLocation(QDesktopServices::DesktopLocation), tr("QGroundControl Widget (*%1);;").arg(widgetFileExtension));
    if (fileName != "") loadCustomWidget(fileName);
}

void MainWindow::loadCustomWidget(const QString& fileName, bool singleinstance)
{
    QGCToolWidget* tool = new QGCToolWidget("", this);
    if (tool->loadSettings(fileName, true) || !singleinstance)
    {
        // Add widget to UI
        QDockWidget* dock = new QDockWidget(tool->getTitle(), this);
        connect(tool, SIGNAL(destroyed()), dock, SLOT(deleteLater()));
        dock->setWidget(tool);
//        dock->setObjectName();
        tool->setParent(dock);

        QAction* showAction = new QAction(tool->getTitle(), this);
        showAction->setCheckable(true);
        connect(dock, SIGNAL(visibilityChanged(bool)), showAction, SLOT(setChecked(bool)));
        connect(showAction, SIGNAL(triggered(bool)), dock, SLOT(setVisible(bool)));
        tool->setMainMenuAction(showAction);
        ui.menuTools->addAction(showAction);
        this->addDockWidget(Qt::BottomDockWidgetArea, dock);
        dock->setVisible(true);
    }
    else
    {
        return;
    }
}

void MainWindow::loadCustomWidgetsFromDefaults(const QString& systemType, const QString& autopilotType)
{
    QString defaultsDir = qApp->applicationDirPath() + "/files/" + systemType.toLower() + "/" + autopilotType.toLower() + "/widgets/";

    QDir widgets(defaultsDir);
    QStringList files = widgets.entryList();
    if (files.count() == 0)
    {
        qDebug() << "No default custom widgets for system " << systemType << "autopilot" << autopilotType << " found";
        qDebug() << "Tried with path: " << defaultsDir;
    }

    // Load all custom widgets found in the AP folder
    for(int i = 0; i < files.count(); ++i)
    {
        QString file = files[i];
        if (file.endsWith(".qgw"))
        {
            // Will only be loaded if not already a custom widget with
            // the same name is present
            qDebug() << "Tried to load file: " << defaultsDir+file;
            loadCustomWidget(defaultsDir+file, true);
        }
    }
}

void MainWindow::loadSettings()
{
    QSettings settings;
    settings.beginGroup("QGC_MAINWINDOW");
    autoReconnect = settings.value("AUTO_RECONNECT", autoReconnect).toBool();
    currentStyle = (QGC_MAINWINDOW_STYLE)settings.value("CURRENT_STYLE", currentStyle).toInt();
    lowPowerMode = settings.value("LOW_POWER_MODE", lowPowerMode).toBool();
    settings.endGroup();
}

void MainWindow::storeSettings()
{
    QSettings settings;
    settings.beginGroup("QGC_MAINWINDOW");
    settings.setValue("AUTO_RECONNECT", autoReconnect);
    settings.setValue("CURRENT_STYLE", currentStyle);
    settings.endGroup();
    if (!aboutToCloseFlag && isVisible())
    {
        settings.setValue(getWindowGeometryKey(), saveGeometry());
        // Save the last current view in any case
        settings.setValue("CURRENT_VIEW", currentView);
        // Save the current window state, but only if a system is connected (else no real number of widgets would be present)
        if (UASManager::instance()->getUASList().length() > 0) settings.setValue(getWindowStateKey(), saveState(QGC::applicationVersion()));
        // Save the current view only if a UAS is connected
        if (UASManager::instance()->getUASList().length() > 0) settings.setValue("CURRENT_VIEW_WITH_UAS_CONNECTED", currentView);
        // Save the current power mode
    }
    settings.setValue("LOW_POWER_MODE", lowPowerMode);
    settings.sync();
}

void MainWindow::configureWindowName()
{
    QList<QHostAddress> hostAddresses = QNetworkInterface::allAddresses();
    QString windowname = qApp->applicationName() + " " + qApp->applicationVersion();
    bool prevAddr = false;

    windowname.append(" (" + QHostInfo::localHostName() + ": ");

    for (int i = 0; i < hostAddresses.size(); i++)
    {
        // Exclude loopback IPv4 and all IPv6 addresses
        if (hostAddresses.at(i) != QHostAddress("127.0.0.1") && !hostAddresses.at(i).toString().contains(":"))
        {
            if(prevAddr) windowname.append("/");
            windowname.append(hostAddresses.at(i).toString());
            prevAddr = true;
        }
    }

    windowname.append(")");

    setWindowTitle(windowname);

#ifndef Q_WS_MAC
    //qApp->setWindowIcon(QIcon(":/core/images/qtcreator_logo_128.png"));
#endif
}

void MainWindow::startVideoCapture()
{
    QString format = "bmp";
    QString initialPath = QDir::currentPath() + tr("/untitled.") + format;

    QString screenFileName = QFileDialog::getSaveFileName(this, tr("Save As"),
                             initialPath,
                             tr("%1 Files (*.%2);;All Files (*)")
                             .arg(format.toUpper())
                             .arg(format));
    delete videoTimer;
    videoTimer = new QTimer(this);
    //videoTimer->setInterval(40);
    //connect(videoTimer, SIGNAL(timeout()), this, SLOT(saveScreen()));
    //videoTimer->stop();
}

void MainWindow::stopVideoCapture()
{
    videoTimer->stop();

    // TODO Convert raw images to PNG
}

void MainWindow::saveScreen()
{
    QPixmap window = QPixmap::grabWindow(this->winId());
    QString format = "bmp";

    if (!screenFileName.isEmpty())
    {
        window.save(screenFileName, format.toAscii());
    }
}

void MainWindow::enableAutoReconnect(bool enabled)
{
    autoReconnect = enabled;
}

void MainWindow::loadNativeStyle()
{
    loadStyle(QGC_MAINWINDOW_STYLE_NATIVE);
}

void MainWindow::loadIndoorStyle()
{
    loadStyle(QGC_MAINWINDOW_STYLE_INDOOR);
}

void MainWindow::loadOutdoorStyle()
{
    loadStyle(QGC_MAINWINDOW_STYLE_OUTDOOR);
}

void MainWindow::loadStyle(QGC_MAINWINDOW_STYLE style)
{
    switch (style) {
    case QGC_MAINWINDOW_STYLE_NATIVE: {
        // Native mode means setting no style
        // so if we were already in native mode
        // take no action
        // Only if a style was set, remove it.
        if (style != currentStyle) {
            qApp->setStyleSheet("");
            showInfoMessage(tr("Please restart QGroundControl"), tr("Please restart QGroundControl to switch to fully native look and feel. Currently you have loaded Qt's plastique style."));
        }
    }
    break;
    case QGC_MAINWINDOW_STYLE_INDOOR:
        qApp->setStyle("plastique");
        styleFileName = ":/images/style-mission.css";
        reloadStylesheet();
        break;
    case QGC_MAINWINDOW_STYLE_OUTDOOR:
        qApp->setStyle("plastique");
        styleFileName = ":/images/style-outdoor.css";
        reloadStylesheet();
        break;
    }
    currentStyle = style;
}

void MainWindow::selectStylesheet()
{
    // Let user select style sheet
    styleFileName = QFileDialog::getOpenFileName(this, tr("Specify stylesheet"), styleFileName, tr("CSS Stylesheet (*.css);;"));

    if (!styleFileName.endsWith(".css")) {
        QMessageBox msgBox;
        msgBox.setIcon(QMessageBox::Information);
        msgBox.setText(tr("QGroundControl did lot load a new style"));
        msgBox.setInformativeText(tr("No suitable .css file selected. Please select a valid .css file."));
        msgBox.setStandardButtons(QMessageBox::Ok);
        msgBox.setDefaultButton(QMessageBox::Ok);
        msgBox.exec();
        return;
    }

    // Load style sheet
    reloadStylesheet();
}

void MainWindow::reloadStylesheet()
{
    // Load style sheet
    QFile* styleSheet = new QFile(styleFileName);
    if (!styleSheet->exists()) {
        styleSheet = new QFile(":/images/style-mission.css");
    }
    if (styleSheet->open(QIODevice::ReadOnly | QIODevice::Text)) {
        QString style = QString(styleSheet->readAll());
        style.replace("ICONDIR", QCoreApplication::applicationDirPath()+ "/images/");
        qApp->setStyleSheet(style);
    } else {
        QMessageBox msgBox;
        msgBox.setIcon(QMessageBox::Information);
        msgBox.setText(tr("QGroundControl did lot load a new style"));
        msgBox.setInformativeText(tr("Stylesheet file %1 was not readable").arg(styleFileName));
        msgBox.setStandardButtons(QMessageBox::Ok);
        msgBox.setDefaultButton(QMessageBox::Ok);
        msgBox.exec();
    }
    delete styleSheet;
}

/**
 * The status message will be overwritten if a new message is posted to this function
 *
 * @param status message text
 * @param timeout how long the status should be displayed
 */
void MainWindow::showStatusMessage(const QString& status, int timeout)
{
    statusBar()->showMessage(status, timeout);
}

/**
 * The status message will be overwritten if a new message is posted to this function.
 * it will be automatically hidden after 5 seconds.
 *
 * @param status message text
 */
void MainWindow::showStatusMessage(const QString& status)
{
    statusBar()->showMessage(status, 20000);
}

void MainWindow::showCriticalMessage(const QString& title, const QString& message)
{
    QMessageBox msgBox(this);
    msgBox.setIcon(QMessageBox::Critical);
    msgBox.setText(title);
    msgBox.setInformativeText(message);
    msgBox.setStandardButtons(QMessageBox::Ok);
    msgBox.setDefaultButton(QMessageBox::Ok);
    msgBox.exec();
}

void MainWindow::showInfoMessage(const QString& title, const QString& message)
{
    QMessageBox msgBox(this);
    msgBox.setIcon(QMessageBox::Information);
    msgBox.setText(title);
    msgBox.setInformativeText(message);
    msgBox.setStandardButtons(QMessageBox::Ok);
    msgBox.setDefaultButton(QMessageBox::Ok);
    msgBox.exec();
}

/**
* @brief Create all actions associated to the main window
*
**/
void MainWindow::connectCommonActions()
{
    // Bind together the perspective actions
    QActionGroup* perspectives = new QActionGroup(ui.menuPerspectives);
    perspectives->addAction(ui.actionEngineersView);
    perspectives->addAction(ui.actionMavlinkView);
    perspectives->addAction(ui.actionPilotsView);
    perspectives->addAction(ui.actionOperatorsView);
    perspectives->addAction(ui.actionUnconnectedView);
    perspectives->setExclusive(true);

    // Mark the right one as selected
    if (currentView == VIEW_ENGINEER) ui.actionEngineersView->setChecked(true);
    if (currentView == VIEW_MAVLINK) ui.actionMavlinkView->setChecked(true);
    if (currentView == VIEW_PILOT) ui.actionPilotsView->setChecked(true);
    if (currentView == VIEW_OPERATOR) ui.actionOperatorsView->setChecked(true);
    if (currentView == VIEW_UNCONNECTED) ui.actionUnconnectedView->setChecked(true);

    // The UAS actions are not enabled without connection to system
    ui.actionLiftoff->setEnabled(false);
    ui.actionLand->setEnabled(false);
    ui.actionEmergency_Kill->setEnabled(false);
    ui.actionEmergency_Land->setEnabled(false);
    ui.actionShutdownMAV->setEnabled(false);

    // Connect actions from ui
    connect(ui.actionAdd_Link, SIGNAL(triggered()), this, SLOT(addLink()));

    // Connect internal actions
    connect(UASManager::instance(), SIGNAL(UASCreated(UASInterface*)), this, SLOT(UASCreated(UASInterface*)));
    connect(UASManager::instance(), SIGNAL(activeUASSet(UASInterface*)), this, SLOT(setActiveUAS(UASInterface*)));

    // Unmanned System controls
    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()
{
    if (!aboutToCloseFlag)
    {
        // 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);
    }
}