Method MainWindow

source/MainWindow.cpp:243–718

}

MainWindow::MainWindow(QWidget *parent) 
    : QMainWindow(parent), localServer(nullptr) {

    // Initial fallback before widgets are wired; the canonical title comes
    // from updateWindowTitle() at the end of the ctor and on every active-
    // viewport / current-tab change thereafter.
    setWindowTitle(QStringLiteral("SpeedyNote"));

    // Phase 3.1: Always using new DocumentViewport architecture

#if defined(Q_OS_LINUX) && !defined(Q_OS_ANDROID)
    // Setup signal handlers for proper cleanup on Linux (not Android)
    setupLinuxSignalHandlers();
#endif

#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
    // On Android/iOS, auto-save all modified documents when app goes to background
    // This is critical because the app may be killed without closeEvent()
    // when user swipes from recents. Without this:
    // 1. Unsaved changes would be lost
    // 2. New documents wouldn't appear in Launcher
    // 
    // Note: This connect is set up early in constructor, but m_documentManager
    // is initialized just after. The lambda captures 'this' and checks for null.
    connect(qApp, &QGuiApplication::applicationStateChanged,
            this, [this](Qt::ApplicationState state) {
#ifdef SPEEDYNOTE_DEBUG
        qDebug() << "[MainWindow] Application state changed to:" 
                 << (state == Qt::ApplicationActive ? "Active" :
                     state == Qt::ApplicationSuspended ? "Suspended" :
                     state == Qt::ApplicationInactive ? "Inactive" : "Hidden");
#endif
        if (state == Qt::ApplicationSuspended || state == Qt::ApplicationInactive) {
            // Sync positions for all documents before auto-save
            // This ensures lastAccessedPage/edgeless position is saved
            syncAllDocumentPositions();
            
            if (m_documentManager) {
                // autoSaveModifiedDocuments() also saves NotebookLibrary internally
#ifdef SPEEDYNOTE_DEBUG
                qDebug() << "[MainWindow] Triggering auto-save, document count:" << m_documentManager->documentCount();
#endif
                int saved = m_documentManager->autoSaveModifiedDocuments();
#ifdef SPEEDYNOTE_DEBUG
                qDebug() << "[MainWindow] Auto-saved" << saved << "documents";
#endif
            } else {
#ifdef SPEEDYNOTE_DEBUG
                qDebug() << "[MainWindow] m_documentManager is null, only saving NotebookLibrary";
#endif
                // Fallback: save NotebookLibrary directly if DocumentManager not ready
                NotebookLibrary::instance()->save();
            }
        }
    });
#endif

    // Enable IME support for multi-language input