Is it possible to inherit from an Qt Ui Designer Class?

[incam]

Hey everyone,

I asked myself and could not find an answer about how it is possible to inherit Ui Designer Classes.
I got the Dialog class for which I designed an Ui and the BoardDialog class, which should inherit Dialog.

Qt Creator always tells me "member access into incomplete type 'Ui::Dialog' if I try to access the ui in the subclass.
Normally this was caused by forgetting to include the .h-file, but now it is not the problem.

I hope you can help,
Thank you.

dialog.h

#include <QDialog>
#include <QGraphicsScene>
#include <project.h>

namespace Ui {
    class Dialog;
}

class Dialog : public QDialog
{
    Q_OBJECT

protected:
    Ui::Dialog *ui;
    Project *m_project;
    QGraphicsScene *m_prevScene;
public:
    explicit Dialog(Project *project);
    virtual ~Dialog();
    virtual void save();
    void cancel();
    virtual void updatePreview();
};

BoardDialog.h

#include <board.h>
#include <dialog.h>

namespace Ui {
    class BoardDialog;
}

class BoardDialog : public Dialog
{
    Q_OBJECT
private:
    Board *m_board;
public:
    BoardDialog(Project *project);
};

BoardDialog.cpp

#include "boarddialog.h"

BoardDialog::BoardDialog(Project *project) :
    Dialog(project)
{
    ui->keyboardWidget->hide();    // here I get the error message "member access into incomplete type 'Ui::Dialog' "
}

[sierdzio]

Make sure you run qmake and make at least once. Then the ui_boarddialog.h will be generated and Qt Creator should pick it up.

[jsulm]

This post is deleted!

[incam]

This post is deleted!

[incam]

@sierdzio
Thank you, including ui_dialog.h worked for me.

[Pablo J. Rogina]

@incam if your issue is solved, please don't forget to mark your post as such. Thanks.