QGCApplication.cc 32.5 KB
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/****************************************************************************
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 *
 *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
 *
 * QGroundControl is licensed according to the terms in the file
 * COPYING.md in the root of the source code directory.
 *
 ****************************************************************************/
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/**
 * @file
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 *   @brief Implementation of class QGCApplication
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 *
 *   @author Lorenz Meier <mavteam@student.ethz.ch>
 *
 */

#include <QFile>
#include <QFlags>
#include <QPixmap>
#include <QDesktopWidget>
#include <QPainter>
#include <QStyleFactory>
#include <QAction>
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#include <QStringListModel>
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#include <QRegularExpression>
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#include <QFontDatabase>
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#ifdef QGC_ENABLE_BLUETOOTH
#include <QBluetoothLocalDevice>
#endif

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#include <QDebug>

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#include "VideoStreaming.h"
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#include "QGC.h"
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#include "QGCApplication.h"
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#include "CmdLineOptParser.h"
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#include "UDPLink.h"
#include "LinkManager.h"
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#include "UASMessageHandler.h"
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#include "QGCTemporaryFile.h"
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#include "QGCPalette.h"
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#include "QGCMapPalette.h"
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#include "QGCLoggingCategory.h"
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#include "ViewWidgetController.h"
#include "ParameterEditorController.h"
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#include "CustomCommandWidgetController.h"
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#include "ESP8266ComponentController.h"
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#include "ScreenToolsController.h"
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#include "QGCFileDialogController.h"
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#include "RCChannelMonitorController.h"
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#include "SyslinkComponentController.h"
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#include "AutoPilotPlugin.h"
#include "VehicleComponent.h"
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#include "FirmwarePluginManager.h"
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#include "MultiVehicleManager.h"
#include "Vehicle.h"
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#include "JoystickConfigController.h"
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#include "JoystickManager.h"
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#include "QmlObjectListModel.h"
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#include "QGCGeoBoundingCube.h"
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#include "MissionManager.h"
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#include "QGroundControlQmlGlobal.h"
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#include "FlightMapSettings.h"
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#include "CoordinateVector.h"
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#include "PlanMasterController.h"
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#include "VideoManager.h"
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#include "VideoSurface.h"
#include "VideoReceiver.h"
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#include "LogDownloadController.h"
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#include "MAVLinkInspectorController.h"
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#include "ValuesWidgetController.h"
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#include "AppMessages.h"
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#include "SimulatedPosition.h"
#include "PositionManager.h"
#include "FollowMe.h"
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#include "MissionCommandTree.h"
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#include "QGCMapPolygon.h"
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#include "QGCMapCircle.h"
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#include "ParameterManager.h"
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#include "SettingsManager.h"
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#include "QGCCorePlugin.h"
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#include "QGCCameraManager.h"
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#include "CameraCalc.h"
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#include "VisualMissionItem.h"
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#include "EditPositionDialogController.h"
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#include "FactValueSliderListModel.h"
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#include "ShapeFileHelper.h"
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#include "QGCFileDownload.h"
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#include "FirmwareImage.h"
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#include "MavlinkConsoleController.h"
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#include "MAVLinkInspectorController.h"
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#include "GeoTagController.h"
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#include "LogReplayLink.h"
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#include "VehicleObjectAvoidance.h"
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#ifndef __mobile__
#include "FirmwareUpgradeController.h"
#endif
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#ifndef NO_SERIAL_LINK
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#include "SerialLink.h"
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#endif

#ifndef __mobile__
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#include "GPS/GPSManager.h"
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#endif
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#ifdef QGC_RTLAB_ENABLED
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#include "OpalLink.h"
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#endif
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#ifdef Q_OS_LINUX
#ifndef __mobile__
#include <unistd.h>
#include <sys/types.h>
#endif
#endif
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#include "QGCMapEngine.h"

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QGCApplication* QGCApplication::_app = nullptr;
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const char* QGCApplication::_deleteAllSettingsKey           = "DeleteAllSettingsNextBoot";
const char* QGCApplication::_settingsVersionKey             = "SettingsVersion";
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// Mavlink status structures for entire app
mavlink_status_t m_mavlink_status[MAVLINK_COMM_NUM_BUFFERS];

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// Qml Singleton factories
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static QObject* screenToolsControllerSingletonFactory(QQmlEngine*, QJSEngine*)
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{
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    ScreenToolsController* screenToolsController = new ScreenToolsController;
    return screenToolsController;
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}

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static QObject* qgroundcontrolQmlGlobalSingletonFactory(QQmlEngine*, QJSEngine*)
{
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    // We create this object as a QGCTool even though it isn't in the toolbox
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    QGroundControlQmlGlobal* qmlGlobal = new QGroundControlQmlGlobal(qgcApp(), qgcApp()->toolbox());
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    qmlGlobal->setToolbox(qgcApp()->toolbox());

    return qmlGlobal;
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}

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static QObject* shapeFileHelperSingletonFactory(QQmlEngine*, QJSEngine*)
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{
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    return new ShapeFileHelper;
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}
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QGCApplication::QGCApplication(int &argc, char* argv[], bool unitTesting)
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    : QGuiApplication           (argc, argv)
    , _runningUnitTests         (unitTesting)
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{
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    _app = this;
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#ifdef Q_OS_LINUX
#ifndef __mobile__
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    if (!_runningUnitTests) {
        if (getuid() == 0) {
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            _exitWithError(QString(
                tr("You are running %1 as root. "
                    "You should not do this since it will cause other issues with %1."
                    "%1 will now exit.<br/><br/>"
                    "If you are having serial port issues on Ubuntu, execute the following commands to fix most issues:<br/>"
                    "<pre>sudo usermod -a -G dialout $USER<br/>"
                    "sudo apt-get remove modemmanager</pre>").arg(qgcApp()->applicationName())));
            return;
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        }
        // Determine if we have the correct permissions to access USB serial devices
        QFile permFile("/etc/group");
        if(permFile.open(QIODevice::ReadOnly)) {
            while(!permFile.atEnd()) {
                QString line = permFile.readLine();
                if (line.contains("dialout") && !line.contains(getenv("USER"))) {
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                    permFile.close();
                    _exitWithError(QString(
                        tr("The current user does not have the correct permissions to access serial devices. "
                           "You should also remove modemmanager since it also interferes.<br/><br/>"
                           "If you are using Ubuntu, execute the following commands to fix these issues:<br/>"
                           "<pre>sudo usermod -a -G dialout $USER<br/>"
                           "sudo apt-get remove modemmanager</pre>")));
                    return;
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                }
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            }
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            permFile.close();
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        }
    }
#endif
#endif

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    // Setup for network proxy support
    QNetworkProxyFactory::setUseSystemConfiguration(true);

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    // Parse command line options
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    bool fClearSettingsOptions = false; // Clear stored settings
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    bool fClearCache = false;           // Clear parameter/airframe caches
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    bool logging = false;               // Turn on logging
    QString loggingOptions;
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    CmdLineOpt_t rgCmdLineOptions[] = {
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        { "--clear-settings",   &fClearSettingsOptions, nullptr },
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        { "--clear-cache",      &fClearCache,           nullptr },
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        { "--logging",          &logging,               &loggingOptions },
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        { "--fake-mobile",      &_fakeMobile,           nullptr },
        { "--log-output",       &_logOutput,            nullptr },
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        // Add additional command line option flags here
    };
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    ParseCmdLineOptions(argc, argv, rgCmdLineOptions, sizeof(rgCmdLineOptions)/sizeof(rgCmdLineOptions[0]), false);
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    // Set up timer for delayed missing fact display
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    _missingParamsDelayedDisplayTimer.setSingleShot(true);
    _missingParamsDelayedDisplayTimer.setInterval(_missingParamsDelayedDisplayTimerTimeout);
    connect(&_missingParamsDelayedDisplayTimer, &QTimer::timeout, this, &QGCApplication::_missingParamsDisplay);
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    // Set application information
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    if (_runningUnitTests) {
        // We don't want unit tests to use the same QSettings space as the normal app. So we tweak the app
        // name. Also we want to run unit tests with clean settings every time.
        setApplicationName(QString("%1_unittest").arg(QGC_APPLICATION_NAME));
    } else {
        setApplicationName(QGC_APPLICATION_NAME);
    }
    setOrganizationName(QGC_ORG_NAME);
    setOrganizationDomain(QGC_ORG_DOMAIN);
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    this->setApplicationVersion(QString(GIT_VERSION));
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    // Set settings format
    QSettings::setDefaultFormat(QSettings::IniFormat);
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    QSettings settings;
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    qDebug() << "Settings location" << settings.fileName() << "Is writable?:" << settings.isWritable();
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#ifdef UNITTEST_BUILD
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    if (!settings.isWritable()) {
        qWarning() << "Setings location is not writable";
    }
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#endif
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    // The setting will delete all settings on this boot
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    fClearSettingsOptions |= settings.contains(_deleteAllSettingsKey);
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    if (_runningUnitTests) {
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        // Unit tests run with clean settings
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        fClearSettingsOptions = true;
    }
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    if (fClearSettingsOptions) {
        // User requested settings to be cleared on command line
        settings.clear();
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        // Clear parameter cache
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        QDir paramDir(ParameterManager::parameterCacheDir());
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        paramDir.removeRecursively();
        paramDir.mkpath(paramDir.absolutePath());
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    } else {
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        // Determine if upgrade message for settings version bump is required. Check and clear must happen before toolbox is started since
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        // that will write some settings.
        if (settings.contains(_settingsVersionKey)) {
            if (settings.value(_settingsVersionKey).toInt() != QGC_SETTINGS_VERSION) {
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                settings.clear();
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                _settingsUpgraded = true;
            }
        } else if (settings.allKeys().count()) {
            // Settings version key is missing and there are settings. This is an upgrade scenario.
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            settings.clear();
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            _settingsUpgraded = true;
        }
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    }
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    settings.setValue(_settingsVersionKey, QGC_SETTINGS_VERSION);
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    if (fClearCache) {
        QDir dir(ParameterManager::parameterCacheDir());
        dir.removeRecursively();
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        QFile airframe(cachedAirframeMetaDataFile());
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        airframe.remove();
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        QFile parameter(cachedParameterMetaDataFile());
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        parameter.remove();
    }

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    // Set up our logging filters
    QGCLoggingCategoryRegister::instance()->setFilterRulesFromSettings(loggingOptions);

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    // Initialize Bluetooth
#ifdef QGC_ENABLE_BLUETOOTH
    QBluetoothLocalDevice localDevice;
    if (localDevice.isValid())
    {
        _bluetoothAvailable = true;
    }
#endif

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    // Gstreamer debug settings
#if defined(__ios__) || defined(__android__)
    // Initialize Video Streaming
    initializeVideoStreaming(argc, argv, nullptr, nullptr);
#else
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    QString savePath, gstDebugLevel;
    if (settings.contains(AppSettings::savePathName)) {
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        savePath = settings.value(AppSettings::savePathName).toString();
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    }
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    if(savePath.isEmpty()) {
        savePath = "/tmp";
    }
    savePath = savePath + "/Logs/gst";
    if (!QDir(savePath).exists()) {
        QDir().mkpath(savePath);
    }
    if (settings.contains(AppSettings::gstDebugLevelName)) {
        gstDebugLevel = "*:" + settings.value(AppSettings::gstDebugLevelName).toString();
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    }
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    // Initialize Video Streaming
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    initializeVideoStreaming(argc, argv, savePath.toUtf8().data(), gstDebugLevel.toUtf8().data());
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#endif
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    _toolbox = new QGCToolbox(this);
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    _toolbox->setChildToolboxes();
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#ifndef __mobile__
    _gpsRtkFactGroup = new GPSRTKFactGroup(this);
   GPSManager *gpsManager = _toolbox->gpsManager();
   if (gpsManager) {
       connect(gpsManager, &GPSManager::onConnect,          this, &QGCApplication::_onGPSConnect);
       connect(gpsManager, &GPSManager::onDisconnect,       this, &QGCApplication::_onGPSDisconnect);
       connect(gpsManager, &GPSManager::surveyInStatus,     this, &QGCApplication::_gpsSurveyInStatus);
       connect(gpsManager, &GPSManager::satelliteUpdate,    this, &QGCApplication::_gpsNumSatellites);
   }
#endif /* __mobile__ */

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   setLanguage();
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    _checkForNewVersion();
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}

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void QGCApplication::_exitWithError(QString errorMessage)
{
    _error = true;
    QQmlApplicationEngine* pEngine = new QQmlApplicationEngine(this);
    pEngine->addImportPath("qrc:/qml");
    pEngine->rootContext()->setContextProperty("errorMessage", errorMessage);
    pEngine->load(QUrl(QStringLiteral("qrc:/qml/ExitWithErrorWindow.qml")));
    // Exit main application when last window is closed
    connect(this, &QGCApplication::lastWindowClosed, this, QGCApplication::quit);
}

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void QGCApplication::setLanguage()
{
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    _locale = QLocale::system();
    qDebug() << "System reported locale:" << _locale << _locale.name();
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    int langID = toolbox()->settingsManager()->appSettings()->language()->rawValue().toInt();
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    //-- See App.SettinsGroup.json for index
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    if(langID) {
        switch(langID) {
        case 1:
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            _locale = QLocale(QLocale::Bulgarian);
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            break;
        case 2:
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            _locale = QLocale(QLocale::Chinese);
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            break;
        case 3:
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            _locale = QLocale(QLocale::Dutch);
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            break;
        case 4:
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            _locale = QLocale(QLocale::English);
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            break;
        case 5:
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            _locale = QLocale(QLocale::Finnish);
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            break;
        case 6:
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            _locale = QLocale(QLocale::French);
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            break;
        case 7:
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            _locale = QLocale(QLocale::German);
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            break;
        case 8:
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            _locale = QLocale(QLocale::Greek);
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            break;
        case 9:
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            _locale = QLocale(QLocale::Hebrew);
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            break;
        case 10:
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            _locale = QLocale(QLocale::Italian);
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            break;
        case 11:
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            _locale = QLocale(QLocale::Japanese);
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            break;
        case 12:
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            _locale = QLocale(QLocale::Korean);
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            break;
        case 13:
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            _locale = QLocale(QLocale::Norwegian);
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            break;
        case 14:
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            _locale = QLocale(QLocale::Polish);
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            break;
        case 15:
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            _locale = QLocale(QLocale::Portuguese);
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            break;
        case 16:
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            _locale = QLocale(QLocale::Russian);
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            break;
        case 17:
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            _locale = QLocale(QLocale::Spanish);
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            break;
        case 18:
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            _locale = QLocale(QLocale::Swedish);
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            break;
        case 19:
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            _locale = QLocale(QLocale::Turkish);
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            break;
        }
    }
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    //-- We have specific fonts for Korean
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    if(_locale == QLocale::Korean) {
        qDebug() << "Loading Korean fonts" << _locale.name();
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        if(QFontDatabase::addApplicationFont(":/fonts/NanumGothic-Regular") < 0) {
            qWarning() << "Could not load /fonts/NanumGothic-Regular font";
        }
        if(QFontDatabase::addApplicationFont(":/fonts/NanumGothic-Bold") < 0) {
            qWarning() << "Could not load /fonts/NanumGothic-Bold font";
        }
    }
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    qDebug() << "Loading localization for" << _locale.name();
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    _app->removeTranslator(&_QGCTranslator);
    _app->removeTranslator(&_QGCTranslatorQt);
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    if(_QGCTranslatorQt.load("qt_" + _locale.name(), QLibraryInfo::location(QLibraryInfo::TranslationsPath))) {
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        _app->installTranslator(&_QGCTranslatorQt);
    } else {
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        qDebug() << "Qt localization for" << _locale.name() << "is not present";
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    }
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    if(_QGCTranslator.load(_locale, QLatin1String("qgc_"), "", ":/i18n")) {
        QLocale::setDefault(_locale);
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        _app->installTranslator(&_QGCTranslator);
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    } else {
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        qDebug() << "Error loading application localization for" << _locale.name();
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    }
    if(_qmlAppEngine)
        _qmlAppEngine->retranslate();
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    emit languageChanged(_locale);
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}

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void QGCApplication::_shutdown()
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{
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    shutdownVideoStreaming();
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    delete _toolbox;
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}

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QGCApplication::~QGCApplication()
{
    // Place shutdown code in _shutdown
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    _app = nullptr;
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}

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void QGCApplication::_initCommon()
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{
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    static const char* kRefOnly         = "Reference only";
    static const char* kQGCControllers  = "QGroundControl.Controllers";
    static const char* kQGCVehicle      = "QGroundControl.Vehicle";

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    QSettings settings;
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    // Register our Qml objects
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    qmlRegisterType<QGCPalette>     ("QGroundControl.Palette", 1, 0, "QGCPalette");
    qmlRegisterType<QGCMapPalette>  ("QGroundControl.Palette", 1, 0, "QGCMapPalette");
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    qmlRegisterUncreatableType<Vehicle>                 (kQGCVehicle,                       1, 0, "Vehicle",                    kRefOnly);
    qmlRegisterUncreatableType<MissionItem>             (kQGCVehicle,                       1, 0, "MissionItem",                kRefOnly);
    qmlRegisterUncreatableType<MissionManager>          (kQGCVehicle,                       1, 0, "MissionManager",             kRefOnly);
    qmlRegisterUncreatableType<ParameterManager>        (kQGCVehicle,                       1, 0, "ParameterManager",           kRefOnly);
    qmlRegisterUncreatableType<VehicleObjectAvoidance>  (kQGCVehicle,                       1, 0, "VehicleObjectAvoidance",     kRefOnly);
    qmlRegisterUncreatableType<QGCCameraManager>        (kQGCVehicle,                       1, 0, "QGCCameraManager",           kRefOnly);
    qmlRegisterUncreatableType<QGCCameraControl>        (kQGCVehicle,                       1, 0, "QGCCameraControl",           kRefOnly);
    qmlRegisterUncreatableType<QGCVideoStreamInfo>      (kQGCVehicle,                       1, 0, "QGCVideoStreamInfo",         kRefOnly);
    qmlRegisterUncreatableType<LinkInterface>           (kQGCVehicle,                       1, 0, "LinkInterface",              kRefOnly);
    qmlRegisterUncreatableType<MissionController>       (kQGCControllers,                   1, 0, "MissionController",          kRefOnly);
    qmlRegisterUncreatableType<GeoFenceController>      (kQGCControllers,                   1, 0, "GeoFenceController",         kRefOnly);
    qmlRegisterUncreatableType<RallyPointController>    (kQGCControllers,                   1, 0, "RallyPointController",       kRefOnly);
    qmlRegisterUncreatableType<VisualMissionItem>       (kQGCControllers,                   1, 0, "VisualMissionItem",          kRefOnly);
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    qmlRegisterUncreatableType<CoordinateVector>    ("QGroundControl",                      1, 0, "CoordinateVector",           kRefOnly);
    qmlRegisterUncreatableType<QmlObjectListModel>  ("QGroundControl",                      1, 0, "QmlObjectListModel",         kRefOnly);
    qmlRegisterUncreatableType<MissionCommandTree>  ("QGroundControl",                      1, 0, "MissionCommandTree",         kRefOnly);
    qmlRegisterUncreatableType<CameraCalc>          ("QGroundControl",                      1, 0, "CameraCalc",                 kRefOnly);
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    qmlRegisterUncreatableType<LogReplayLink>       ("QGroundControl",                      1, 0, "LogReplayLink",              kRefOnly);

    qmlRegisterType<LogReplayLinkController>        ("QGroundControl",                      1, 0, "LogReplayLinkController");
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    qmlRegisterUncreatableType<AutoPilotPlugin>     ("QGroundControl.AutoPilotPlugin",      1, 0, "AutoPilotPlugin",            kRefOnly);
    qmlRegisterUncreatableType<VehicleComponent>    ("QGroundControl.AutoPilotPlugin",      1, 0, "VehicleComponent",           kRefOnly);
    qmlRegisterUncreatableType<JoystickManager>     ("QGroundControl.JoystickManager",      1, 0, "JoystickManager",            kRefOnly);
    qmlRegisterUncreatableType<Joystick>            ("QGroundControl.JoystickManager",      1, 0, "Joystick",                   kRefOnly);
    qmlRegisterUncreatableType<QGCPositionManager>  ("QGroundControl.QGCPositionManager",   1, 0, "QGCPositionManager",         kRefOnly);
    qmlRegisterUncreatableType<FactValueSliderListModel>("QGroundControl.FactControls",     1, 0, "FactValueSliderListModel",   kRefOnly);

    qmlRegisterUncreatableType<QGCMapPolygon>       ("QGroundControl.FlightMap",            1, 0, "QGCMapPolygon",              kRefOnly);
    qmlRegisterUncreatableType<QGCGeoBoundingCube>  ("QGroundControl.FlightMap",            1, 0, "QGCGeoBoundingCube",         kRefOnly);

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    qmlRegisterType<QGCMapCircle>                   ("QGroundControl.FlightMap",            1, 0, "QGCMapCircle");
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    qmlRegisterType<ParameterEditorController>      (kQGCControllers,                       1, 0, "ParameterEditorController");
    qmlRegisterType<ESP8266ComponentController>     (kQGCControllers,                       1, 0, "ESP8266ComponentController");
    qmlRegisterType<ScreenToolsController>          (kQGCControllers,                       1, 0, "ScreenToolsController");
    qmlRegisterType<PlanMasterController>           (kQGCControllers,                       1, 0, "PlanMasterController");
    qmlRegisterType<ValuesWidgetController>         (kQGCControllers,                       1, 0, "ValuesWidgetController");
    qmlRegisterType<QGCFileDialogController>        (kQGCControllers,                       1, 0, "QGCFileDialogController");
    qmlRegisterType<RCChannelMonitorController>     (kQGCControllers,                       1, 0, "RCChannelMonitorController");
    qmlRegisterType<JoystickConfigController>       (kQGCControllers,                       1, 0, "JoystickConfigController");
    qmlRegisterType<LogDownloadController>          (kQGCControllers,                       1, 0, "LogDownloadController");
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    qmlRegisterType<MAVLinkInspectorController>     (kQGCControllers,                       1, 0, "MAVLinkInspectorController");
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    qmlRegisterType<SyslinkComponentController>     (kQGCControllers,                       1, 0, "SyslinkComponentController");
    qmlRegisterType<EditPositionDialogController>   (kQGCControllers,                       1, 0, "EditPositionDialogController");
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#ifndef __mobile__
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#ifndef NO_SERIAL_LINK
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    qmlRegisterType<FirmwareUpgradeController>      (kQGCControllers,                       1, 0, "FirmwareUpgradeController");
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#endif
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#endif
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    qmlRegisterType<GeoTagController>               (kQGCControllers,                       1, 0, "GeoTagController");
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    qmlRegisterType<MavlinkConsoleController>       (kQGCControllers,                       1, 0, "MavlinkConsoleController");
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    qmlRegisterType<MAVLinkInspectorController>     (kQGCControllers,                       1, 0, "MAVLinkInspectorController");
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    // Register Qml Singletons
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    qmlRegisterSingletonType<QGroundControlQmlGlobal>   ("QGroundControl",                          1, 0, "QGroundControl",         qgroundcontrolQmlGlobalSingletonFactory);
    qmlRegisterSingletonType<ScreenToolsController>     ("QGroundControl.ScreenToolsController",    1, 0, "ScreenToolsController",  screenToolsControllerSingletonFactory);
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    qmlRegisterSingletonType<ShapeFileHelper>           ("QGroundControl.ShapeFileHelper",          1, 0, "ShapeFileHelper",        shapeFileHelperSingletonFactory);
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}

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bool QGCApplication::_initForNormalAppBoot()
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{
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    if(QFontDatabase::addApplicationFont(":/fonts/opensans") < 0) {
        qWarning() << "Could not load /fonts/opensans font";
    }
    if(QFontDatabase::addApplicationFont(":/fonts/opensans-demibold") < 0) {
        qWarning() << "Could not load /fonts/opensans-demibold font";
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    }

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    QSettings settings;
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    // Exit main application when last window is closed
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    connect(this, &QGCApplication::lastWindowClosed, this, QGCApplication::quit);
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    _qmlAppEngine = toolbox()->corePlugin()->createRootWindow(this);
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    // Now that main window is up check for lost log files
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    connect(this, &QGCApplication::checkForLostLogFiles, toolbox()->mavlinkProtocol(), &MAVLinkProtocol::checkForLostLogFiles);
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    emit checkForLostLogFiles();
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    // Load known link configurations
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    toolbox()->linkManager()->loadLinkConfigurationList();
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    // Probe for joysticks
    toolbox()->joystickManager()->init();
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    if (_settingsUpgraded) {
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        showMessage(QString(tr("The format for %1 saved settings has been modified. "
                    "Your saved settings have been reset to defaults.")).arg(applicationName()));
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    }

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    // Connect links with flag AutoconnectLink
    toolbox()->linkManager()->startAutoConnectedLinks();

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    if (getQGCMapEngine()->wasCacheReset()) {
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        showMessage(tr("The Offline Map Cache database has been upgraded. "
                    "Your old map cache sets have been reset."));
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    }

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    settings.sync();
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    return true;
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}

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bool QGCApplication::_initForUnitTests()
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{
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    return true;
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}

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void QGCApplication::deleteAllSettingsNextBoot(void)
{
    QSettings settings;
    settings.setValue(_deleteAllSettingsKey, true);
}

void QGCApplication::clearDeleteAllSettingsNextBoot(void)
{
    QSettings settings;
    settings.remove(_deleteAllSettingsKey);
}

/// @brief Returns the QGCApplication object singleton.
QGCApplication* qgcApp(void)
{
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    return QGCApplication::_app;
}

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void QGCApplication::informationMessageBoxOnMainThread(const QString& title, const QString& msg)
{
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    Q_UNUSED(title);
    showMessage(msg);
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}

void QGCApplication::warningMessageBoxOnMainThread(const QString& title, const QString& msg)
{
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    Q_UNUSED(title)
    showMessage(msg);
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}

void QGCApplication::criticalMessageBoxOnMainThread(const QString& title, const QString& msg)
{
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    Q_UNUSED(title)
    showMessage(msg);
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}

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void QGCApplication::saveTelemetryLogOnMainThread(QString tempLogfile)
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{
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    // The vehicle is gone now and we are shutting down so we need to use a message box for errors to hold shutdown and show the error
    if (_checkTelemetrySavePath(true /* useMessageBox */)) {

        QString saveDirPath = _toolbox->settingsManager()->appSettings()->telemetrySavePath();
        QDir saveDir(saveDirPath);

        QString nameFormat("%1%2.%3");
        QString dtFormat("yyyy-MM-dd hh-mm-ss");
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        int tryIndex = 1;
        QString saveFileName = nameFormat.arg(
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            QDateTime::currentDateTime().toString(dtFormat)).arg(QStringLiteral("")).arg(toolbox()->settingsManager()->appSettings()->telemetryFileExtension);
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        while (saveDir.exists(saveFileName)) {
            saveFileName = nameFormat.arg(
                QDateTime::currentDateTime().toString(dtFormat)).arg(QStringLiteral(".%1").arg(tryIndex++)).arg(toolbox()->settingsManager()->appSettings()->telemetryFileExtension);
        }
        QString saveFilePath = saveDir.absoluteFilePath(saveFileName);

        QFile tempFile(tempLogfile);
        if (!tempFile.copy(saveFilePath)) {
            QString error = tr("Unable to save telemetry log. Error copying telemetry to '%1': '%2'.").arg(saveFilePath).arg(tempFile.errorString());
            showMessage(error);
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        }
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    }
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    QFile::remove(tempLogfile);
}
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void QGCApplication::checkTelemetrySavePathOnMainThread()
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{
    // This is called with an active vehicle so don't pop message boxes which holds ui thread
    _checkTelemetrySavePath(false /* useMessageBox */);
}

bool QGCApplication::_checkTelemetrySavePath(bool useMessageBox)
{
    QString errorTitle = tr("Telemetry save error");

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    QString saveDirPath = _toolbox->settingsManager()->appSettings()->telemetrySavePath();
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    if (saveDirPath.isEmpty()) {
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        QString error = tr("Unable to save telemetry log. Application save directory is not set.");
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        Q_UNUSED(useMessageBox);
        showMessage(error);
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        return false;
    }

    QDir saveDir(saveDirPath);
    if (!saveDir.exists()) {
        QString error = tr("Unable to save telemetry log. Telemetry save directory \"%1\" does not exist.").arg(saveDirPath);
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        showMessage(error);
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        return false;
    }

    return true;
}
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void QGCApplication::reportMissingParameter(int componentId, const QString& name)
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{
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    _missingParams += QString("%1:%2").arg(componentId).arg(name);
    _missingParamsDelayedDisplayTimer.start();
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}
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/// Called when the delay timer fires to show the missing parameters warning
void QGCApplication::_missingParamsDisplay(void)
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{
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    if (_missingParams.count()) {
        QString params;
        foreach (const QString &name, _missingParams) {
            if (params.isEmpty()) {
                params += name;
            } else {
                params += QString(", %1").arg(name);
            }
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        }
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        _missingParams.clear();
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        showMessage(tr("Parameters are missing from firmware. You may be running a version of firmware QGC does not work correctly with or your firmware has a bug in it. Missing params: %1").arg(params));
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    }
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}

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QObject* QGCApplication::_rootQmlObject()
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{
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    if(_qmlAppEngine && _qmlAppEngine->rootObjects().size())
        return _qmlAppEngine->rootObjects()[0];
    return nullptr;
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}


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void QGCApplication::showMessage(const QString& message)
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{
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    // PreArm messages are handled by Vehicle and shown in Map
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    if (message.startsWith(QStringLiteral("PreArm")) || message.startsWith(QStringLiteral("preflight"), Qt::CaseInsensitive)) {
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        return;
    }
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    QObject* rootQmlObject = _rootQmlObject();
    if (rootQmlObject) {
        QVariant varReturn;
        QVariant varMessage = QVariant::fromValue(message);
        QMetaObject::invokeMethod(_rootQmlObject(), "showMessage", Q_RETURN_ARG(QVariant, varReturn), Q_ARG(QVariant, varMessage));
    } else {
        qWarning() << "Internal error";
    }
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}

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QQuickItem* QGCApplication::mainRootWindow()
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{
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    if(_mainRootWindow) {
        _mainRootWindow = reinterpret_cast<QQuickItem*>(_rootQmlObject());
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    }
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    return _mainRootWindow;
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}

void QGCApplication::showSetupView()
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{
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    if(_rootQmlObject()) {
        QMetaObject::invokeMethod(_rootQmlObject(), "showSetupView");
    }
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}

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void QGCApplication::qmlAttemptWindowClose()
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{
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    if(_rootQmlObject()) {
        QMetaObject::invokeMethod(_rootQmlObject(), "attemptWindowClose");
    }
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}
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bool QGCApplication::isInternetAvailable()
{
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    if(_toolbox->settingsManager()->appSettings()->checkInternet()->rawValue().toBool())
        return getQGCMapEngine()->isInternetActive();
    return true;
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}
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void QGCApplication::_checkForNewVersion()
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{
#ifndef __mobile__
    if (!_runningUnitTests) {
        if (_parseVersionText(applicationVersion(), _majorVersion, _minorVersion, _buildVersion)) {
            QString versionCheckFile = toolbox()->corePlugin()->stableVersionCheckFileUrl();
            if (!versionCheckFile.isEmpty()) {
                _currentVersionDownload = new QGCFileDownload(this);
                connect(_currentVersionDownload, &QGCFileDownload::downloadFinished, this, &QGCApplication::_currentVersionDownloadFinished);
                connect(_currentVersionDownload, &QGCFileDownload::error, this, &QGCApplication::_currentVersionDownloadError);
                _currentVersionDownload->download(versionCheckFile);
            }
        }
    }
#endif
}

void QGCApplication::_currentVersionDownloadFinished(QString remoteFile, QString localFile)
{
    Q_UNUSED(remoteFile);

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#ifdef __mobile__
    Q_UNUSED(localFile);
#else
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    QFile versionFile(localFile);
    if (versionFile.open(QIODevice::ReadOnly)) {
        QTextStream textStream(&versionFile);
        QString version = textStream.readLine();

        qDebug() << version;

        int majorVersion, minorVersion, buildVersion;
        if (_parseVersionText(version, majorVersion, minorVersion, buildVersion)) {
            if (_majorVersion < majorVersion ||
                    (_majorVersion == majorVersion && _minorVersion < minorVersion) ||
                    (_majorVersion == majorVersion && _minorVersion == minorVersion && _buildVersion < buildVersion)) {
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                //-- TODO
                ///QGCMessageBox::information(tr("New Version Available"), tr("There is a newer version of %1 available. You can download it from %2.").arg(applicationName()).arg(toolbox()->corePlugin()->stableDownloadLocation()));
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            }
        }
    }

    _currentVersionDownload->deleteLater();
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#endif
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}

void QGCApplication::_currentVersionDownloadError(QString errorMsg)
{
    Q_UNUSED(errorMsg);
    _currentVersionDownload->deleteLater();
}

bool QGCApplication::_parseVersionText(const QString& versionString, int& majorVersion, int& minorVersion, int& buildVersion)
{
    QRegularExpression regExp("v(\\d+)\\.(\\d+)\\.(\\d+)");
    QRegularExpressionMatch match = regExp.match(versionString);
    if (match.hasMatch() && match.lastCapturedIndex() == 3) {
        majorVersion = match.captured(1).toInt();
        minorVersion = match.captured(2).toInt();
        buildVersion = match.captured(3).toInt();
        return true;
    }

    return false;
}
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void QGCApplication::_onGPSConnect()
{
    _gpsRtkFactGroup->connected()->setRawValue(true);
}

void QGCApplication::_onGPSDisconnect()
{
    _gpsRtkFactGroup->connected()->setRawValue(false);
}

void QGCApplication::_gpsSurveyInStatus(float duration, float accuracyMM,  double latitude, double longitude, float altitude, bool valid, bool active)
{
    _gpsRtkFactGroup->currentDuration()->setRawValue(duration);
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    _gpsRtkFactGroup->currentAccuracy()->setRawValue(static_cast<double>(accuracyMM) / 1000.0);
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    _gpsRtkFactGroup->currentLatitude()->setRawValue(latitude);
    _gpsRtkFactGroup->currentLongitude()->setRawValue(longitude);
    _gpsRtkFactGroup->currentAltitude()->setRawValue(altitude);
    _gpsRtkFactGroup->valid()->setRawValue(valid);
    _gpsRtkFactGroup->active()->setRawValue(active);
}

void QGCApplication::_gpsNumSatellites(int numSatellites)
{
    _gpsRtkFactGroup->numSatellites()->setRawValue(numSatellites);
}

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QString QGCApplication::cachedParameterMetaDataFile(void)
{
    QSettings settings;
    QDir parameterDir = QFileInfo(settings.fileName()).dir();
    return parameterDir.filePath(QStringLiteral("ParameterFactMetaData.xml"));
}

QString QGCApplication::cachedAirframeMetaDataFile(void)
{
    QSettings settings;
    QDir airframeDir = QFileInfo(settings.fileName()).dir();
    return airframeDir.filePath(QStringLiteral("PX4AirframeFactMetaData.xml"));
}