namespace Ui {
class myButton;
}

class myButton : public QPushButton
{
    Q_OBJECT

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

    void setSize(int _xs, int _ys);
    void setPosition(int _xp, int _yp);

private:
    Ui::Tile *ui;
    int xSize = 95;
    int ySize = 95;

protected:
   void paintEvent(QPaintEvent *);

};

myButton::myButton(QWidget *parent) :
    QPushButton(parent),
    ui(new Ui::myButton)
{
    ui->setupUi(this);
}

myButton::~myButton()
{

}

//Paint event of button
void myButton::paintEvent(QPaintEvent *paint){
    QPushButton::paintEvent(paint);
    QPainter p(this);
    p.save();

    p.drawText(QPoint(80,10),"FirstName"); // Simple Text.
    p.setPen(Qt::blue);                    // Changing the color of pen.
    p.setFont(QFont("Arial", 50));         // Changing the font.
    p.drawText(QPoint(80,20),"MiddleName");
    p.drawText(QPoint(80,30),"Lastname");
    p.restore();
}

myButton *newBtn2 = new myButton(this);
newBtn2->show();