The single Inheritance Approach

[jpn]

You designed a widget in the designer, but are using the Ui for a dialog. It works this way, because QDialog inherits QWidget, but more appropriate way is to design a dialog for a dialog, a widget for a widget and a mainwindow for a mainwindow.

// dialog.h
#include "ui_widget1.h"
// you must include this because you designed a widget in the designer
#include <QDialog>
 
class Dialog : public QDialog
{
	Q_OBJECT
 
public:
	Dialog(QWidget *parent = 0);
 
private:
	Ui::Widget1 ui; // corrected the name, check the object name property in the designer
};

// dialog.h
#include "ui_widget1.h"
// you must include this because you designed a widget in the designer
#include <QDialog>

class Dialog : public QDialog
{
	Q_OBJECT

public:
	Dialog(QWidget *parent = 0);

private:
	Ui::Widget1 ui; // corrected the name, check the object name property in the designer
};

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[raphaelf]

Hi JPN!!
Thanks it works. I will design a dialog for a dialog..