Ui is the namespace that Qt Creator puts the designed GUI's in.

The code below shows the code of a default-created Qt Creator dialog, with added comments.


#ifndef DIALOG_H

#define DIALOG_H



#include <QDialog>



//Forward declaration of Ui::Dialog

namespace Ui {

    class Dialog;

}



class Dialog : public QDialog

{

    Q_OBJECT



public:

    explicit Dialog(QWidget *parent = 0);

    ~Dialog();



protected:

    void changeEvent(QEvent *e);



private:

    //Pointer to this Ui::Dialog

    Ui::Dialog *ui;

};



#endif // DIALOG_H

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(C++) Ui