UI (Qt Designer) and inheritance

[G_ka]

Hello,
I'm trying to create a base window class, and then some derived windows with their own UI.
Let's assume I have BaseWindow and DerivedWindow. Both were created with Qt Designer.
BaseWindow has an action "test". DerivedWindow also has an action "test", and a checkbox.
Sources files (probably useless for this question):

BaseWindow.h

namespace Ui {
class BaseWindow;
}

class BaseWindow : public QMainWindow
{

public:
    explicit BaseWindow(QWidget *parent = nullptr) :
        QMainWindow(parent),
        ui(new Ui::BaseWindow)
    {
        ui->setupUi(this);
        connect(ui->actionTest, &QAction::triggered, this, [&]()
        {
            QTextStream(stdout) << "Test action triggered from base window";
        });
    }
    ~BaseWindow()
    {
        delete ui;
    }

private:
    Ui::BaseWindow *ui;
};

DerivedWindow.h

namespace Ui {
class DerivedWindow;
}

class DerivedWindow : public BaseWindow
{

public:
    explicit DerivedWindow(QWidget *parent = nullptr) :
        BaseWindow (parent),
        ui(new Ui::DerivedWindow)
    {
        ui->setupUi(this);

        connect(ui->checkBox, &QCheckBox::clicked, this, [&](){
            QTextStream(stdout) << "Checkbox clicked in derived window";
        });
    }

    ~DerivedWindow()
    {
        delete ui;
    }

private:
    Ui::DerivedWindow *ui;
};

If I click the "test" action in DerivedWindow, nothing will happen. This is expected, since I haven't connected it and both "test" actions are completely separate.

My question is: is it possible to make an UI file inherit from another UI file? So that if I click the "test" action in DerivedWindow, it will work as if it had been clicked in BaseWindow, and print a message?

Thanks.

[SGaist]

Hi,

I may be wrong but I don't think you can do that in an automated way.

What is you use case exactly ?

[G_ka]

It will be better explained with screenshots.

As you can see, those three windows are very similar, but they have some differences. So, making a common base would allow to remove duplicated code.

[JKSH]

@G_ka said in UI (Qt Designer) and inheritance:

those three windows are very similar, but they have some differences. So, making a common base would allow to remove duplicated code.

Instead of creating 3 different window classes, consider using just one class. Dynamically show() or hide() the group boxes depending on which test you want to run.

[G_ka]

@JKSH I was hoping for a better solution, but this looks like this solution is the easier one. Thanks.