debugged a crash, keys are now fetching, refactored main, added some exceptions instead of ints, debugged termination process

main/root.cpp

@@ -17,27 +17,174 @@
 #include "root.h"
 #include <QDebug>
 #include <QThread>
+#include <QLibraryInfo>
+#include <QStandardPaths>
+
+#include <string>
+
+#include <shared/pathcheck.h>
+
+const std::vector<unsigned int> Root::appIconSizes({
+    16, 24, 32, 48, 64, 96, 128, 256, 512
+});
 
 Root::Root(int& argc, char *argv[]) :
-    QApplication(argc, argv)
-    {}
+    QApplication(argc, argv),
+    signalCatcher(this),
+    defaultTranslator(),
+    currentTranslator(),
+    appIcon(),
+    settings(),
+    componentsInitialized(false),
+    global(nullptr),
+    coreThread(nullptr),
+    core(nullptr),
+    gui(nullptr)
+{
+    setApplicationName("squawk");
+    setOrganizationName("macaw.me");
+    setApplicationDisplayName("Squawk");
+    setApplicationVersion("0.2.3");
+    setDesktopFileName("squawk");
+
+    initializeTranslation();
+    initializeAppIcon();
+
+    global = new Shared::Global();  //important to instantiate after initialization of translations;
+}
+
+Root::~Root() {
+    if (componentsInitialized) {
+        delete gui;
+        if (core != nullptr)
+            delete core;
+        delete coreThread;
+    }
+    delete global;
+}
+
+
+void Root::initializeTranslation() {
+    defaultTranslator.load("qt_" + QLocale::system().name(), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
+    installTranslator(&defaultTranslator);
+
+    QStringList shares = QStandardPaths::standardLocations(QStandardPaths::AppDataLocation);
+    bool found = false;
+    for (QString share : shares) {
+        found = currentTranslator.load(QLocale(), QLatin1String("squawk"), ".", share + "/l10n");
+        if (found) {
+            break;
+        }
+    }
+    if (!found) {
+        currentTranslator.load(QLocale(), QLatin1String("squawk"), ".", QCoreApplication::applicationDirPath());
+    }
+
+    installTranslator(&currentTranslator);
+}
+
+void Root::initializeAppIcon() {
+    for (std::vector<unsigned int>::size_type i = 0; i < appIconSizes.size(); ++i)
+        appIcon.addFile(":images/logo.svg", QSize(appIconSizes[i], appIconSizes[i]));
+
+    Root::setWindowIcon(appIcon);
+}
+
+bool Root::initializeSettings() {
+    QVariant vs = settings.value("style");
+    if (vs.isValid()) {
+        QString style = vs.toString().toLower();
+        if (style != "system") {
+            Shared::Global::setStyle(style);
+        }
+    }
+
+    if (Shared::Global::supported("colorSchemeTools")) {
+        QVariant vt = settings.value("theme");
+        if (vt.isValid()) {
+            QString theme = vt.toString();
+            if (theme.toLower() != "system") {
+                Shared::Global::setTheme(theme);
+            }
+        }
+    }
+
+    QString path = Shared::downloadsPathCheck();
+    if (path.size() > 0) {
+        settings.setValue("downloadsPath", path);
+    } else {
+        qDebug() << "couldn't initialize directory for downloads, quitting";
+        return false;
+    }
+
+    return true;
+}
+
+int Root::run() {
+    if (!componentsInitialized)
+        initializeComponents();
+
+    coreThread->start();
+    int result = exec();
+    qDebug("Event loop stopped");
+
+    if (result == 0) {
+        processEvents();                    //I dont like all of this mess
+        if (coreThread->isRunning()) {      //but it's the best solution for now
+            if (core != nullptr) {          //Ideally, following line should never appear in the log
+                qDebug() << "Core is still seems to be running, killing manually";
+                core->deleteLater();
+                coreThread->quit();
+                processEvents();
+                core = nullptr;
+            }
+            coreThread->wait();
+        }
+    }
+
+    return result;
+}
+
+void Root::initializeComponents() {
+    core = new Core::Squawk();
+    coreThread = new QThread();
+    core->moveToThread(coreThread);
+    gui = new Application(core);
+
+    QObject::connect(&signalCatcher, &SignalCatcher::interrupt, gui, &Application::quit);
+
+    QObject::connect(coreThread, &QThread::started, core, &Core::Squawk::start);
+    QObject::connect(gui, &Application::quitting, core, &Core::Squawk::stop);
+
+    QObject::connect(core, &Core::Squawk::quit, core, &Core::Squawk::deleteLater);
+    QObject::connect(core, &Core::Squawk::destroyed, this, &Root::onCoreDestroyed);
+    QObject::connect(core, &Core::Squawk::destroyed, coreThread, &QThread::quit, Qt::QueuedConnection);
+    QObject::connect(coreThread, &QThread::finished, this, &Root::quit, Qt::QueuedConnection);
+
+    componentsInitialized = true;
+}
 
 bool Root::notify(QObject* receiver, QEvent* e) {
     try {
         return QApplication::notify(receiver, e);
     } catch(const std::runtime_error& e) {
-        qDebug() << "std::runtime_error in thread : " << QThread::currentThreadId();
-        qDebug() << e.what();
+        qDebug() << "std::runtime_error in thread:" << QThread::currentThreadId();
+        qDebug() << "error message:" << e.what();
     } catch(const std::exception& e) {
-        qDebug() << "std::exception in thread : " << QThread::currentThreadId();
-        qDebug() << e.what();
+        qDebug() << "std::exception in thread:" << QThread::currentThreadId();
+        qDebug() << "error message:" << e.what();
     } catch(const int& e) {
-        qDebug() << "int exception in thread : " << QThread::currentThreadId();
-        qDebug() << e;
+        qDebug() << "integer exception in thread:" << QThread::currentThreadId();
+        qDebug() << "thrown integer:" << std::to_string(e).c_str();
     } catch(...) {
-        qDebug() << "exception thread : " << QThread::currentThreadId();
+        qDebug() << "unhandled exception thread:" << QThread::currentThreadId();
     }
 
-    qDebug() << "catch in notify ";
+    qDebug() << "Squawk is crashing...";
+    exit(1);
     return false;
 }
+
+void Root::onCoreDestroyed() {
+    core = nullptr;
+}