mainwindow.h Example File

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#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QModbusDataUnit>
class QModbusClient;
class QModbusReply;
namespace Ui {
class MainWindow;
class SettingsDialog;
}
class SettingsDialog;
class WriteRegisterModel;
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
private:
    void initActions();
    QModbusDataUnit readRequest() const;
    QModbusDataUnit writeRequest() const;
private slots:
    void on_connectButton_clicked();
    void onStateChanged(int state);
    void on_readButton_clicked();
    void readReady();
    void on_writeButton_clicked();
    void on_readWriteButton_clicked();
    void on_connectType_currentIndexChanged(int);
    void on_writeTable_currentIndexChanged(int);
private:
    Ui::MainWindow *ui;
    QModbusReply *lastRequest;
    QModbusClient *modbusDevice;
    SettingsDialog *m_settingsDialog;
    WriteRegisterModel *writeModel;
};
#endif // MAINWINDOW_H