How to initialize a QProcess in the following windows

[jefftee]

Try m_opc_ua_server->state() == QProcess::Running instead.

[Max Fleischer]

Thanks, that's working.

[jefftee]

Great, also, to "share" the QProcess with other classes, either pass the QProcess pointer to the other class' constructor or create a getter method in the class that creates/owns the QProcess, for example:

QProcess* control_window::get_process()
{
    return m_opc_ua_server;
}

QProcess* control_window::get_process()
{
    return m_opc_ua_server;
}

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[Max Fleischer]

How can I pass the QProcess Pointer to the constructor?
I tried to use a getter function but the UI still crashes when I write to the process from control_window. I've put the getter function in the header of configuration_window.

configuartion window header:

#ifndef CONFIGURATION_WINDOW_H
#define CONFIGURATION_WINDOW_H
 
#include <QMainWindow>
#include <QProcess>
 
class version_selection;
class control_window;
 
namespace Ui {
class configuration_window;
}
 
class configuration_window : public QMainWindow
{
    Q_OBJECT
 
public:
    explicit configuration_window(QWidget *parent = 0);
    ~configuration_window();
 
    void send_input_to_server();
 
    QProcess *get_process()
    {
        return m_opc_ua_server;
    }
    void set_process(QProcess *server)
    {
        m_opc_ua_server = server;
    }
 
private slots:
    void on_configuration_window_Exit_clicked();
 
    void on_configuration_window_Back_clicked();
 
    void on_configuration_window_Start_clicked();
 
private:
    Ui::configuration_window *ui;
 
    version_selection *m_version_selection;
 
    control_window *m_control_window;
 
    QProcess *m_opc_ua_server;
};
 
#endif // CONFIGURATION_WINDOW_H

#ifndef CONFIGURATION_WINDOW_H
#define CONFIGURATION_WINDOW_H

#include <QMainWindow>
#include <QProcess>

class version_selection;
class control_window;

namespace Ui {
class configuration_window;
}

class configuration_window : public QMainWindow
{
    Q_OBJECT

public:
    explicit configuration_window(QWidget *parent = 0);
    ~configuration_window();

    void send_input_to_server();

    QProcess *get_process()
    {
        return m_opc_ua_server;
    }
    void set_process(QProcess *server)
    {
        m_opc_ua_server = server;
    }

private slots:
    void on_configuration_window_Exit_clicked();

    void on_configuration_window_Back_clicked();

    void on_configuration_window_Start_clicked();

private:
    Ui::configuration_window *ui;

    version_selection *m_version_selection;

    control_window *m_control_window;

    QProcess *m_opc_ua_server;
};

#endif // CONFIGURATION_WINDOW_H

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