Initial commit: add Location Plotter

src/SerialReader.h

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <QObject>
+#include <QString>
+
+class QSocketNotifier;
+class QTimer;
+
+class SerialReader : public QObject {
+    Q_OBJECT
+
+public:
+    explicit SerialReader(QObject *parent = nullptr);
+    ~SerialReader() override;
+
+    [[nodiscard]] bool isOpen() const;
+    [[nodiscard]] QString portName() const;
+
+public slots:
+    bool openPort(const QString &path, int baudRate);
+    void closePort();
+
+signals:
+    void lineReceived(const QString &line);
+    void statusChanged(const QString &status);
+    void errorOccurred(const QString &message);
+
+private slots:
+    void handleReadyRead();
+    void flushPartialLine();
+
+private:
+    bool configurePort(int baudRate);
+    void processBuffer();
+    void setModemControlLines();
+    void emitSystemError(const QString &prefix);
+
+    int m_fd = -1;
+    QSocketNotifier *m_notifier = nullptr;
+    QTimer *m_pollTimer = nullptr;
+    QTimer *m_partialLineTimer = nullptr;
+    QByteArray m_buffer;
+    QString m_portName;
+};