Subclassing a QWidget

[alrawab]

#ifndef DESENHO_H
#define DESENHO_H
 
#include <QWidget>
#include <QVBoxLayout>
#include <QSpacerItem>
#include <QPushButton>
 
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    Widget(QWidget *parent = 0);
    ~Widget();
    void draw(QPainter *painter);
 
protected:
    void paintEvent(QPaintEvent *event);
 
private:
    QPushButton *btn1, *btn2;
    QSpacerItem *spacer;
    QVBoxLayout *verticalLayout;
     QHBoxLayout *horizontalLayout;
};
 
#endif

#ifndef DESENHO_H
#define DESENHO_H

#include <QWidget>
#include <QVBoxLayout>
#include <QSpacerItem>
#include <QPushButton>


class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = 0);
    ~Widget();
    void draw(QPainter *painter);

protected:
    void paintEvent(QPaintEvent *event);

private:
    QPushButton *btn1, *btn2;
    QSpacerItem *spacer;
    QVBoxLayout *verticalLayout;
     QHBoxLayout *horizontalLayout;
};

#endif

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#include <QtGui>
 
#include "widget.h"
 
Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    btn1 = new QPushButton(this);
    btn2 = new QPushButton(this);
    spacer = new QSpacerItem(0,100);
    verticalLayout = new QVBoxLayout(this);
  horizontalLayout=new QHBoxLayout;
  verticalLayout->addStretch(1);
//  horizontalLayout->addItem(spacer);
  horizontalLayout->addWidget(btn1);
  horizontalLayout->addWidget(btn2);
verticalLayout->addLayout(horizontalLayout);
this->setLayout(verticalLayout);
    //verticalLayout->addItem(spacer);
    //verticalLayout->addWidget(btn1);
    //verticalLayout->addWidget(btn2);
}
 
Widget::~Widget()
{
 
}
 
void Widget::paintEvent(QPaintEvent * /* event */)
{
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing, true);
 
 
    draw(&painter);
}
 
void Widget::draw(QPainter *painter)
{
 
 
}

#include <QtGui>

#include "widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    btn1 = new QPushButton(this);
    btn2 = new QPushButton(this);
    spacer = new QSpacerItem(0,100);
    verticalLayout = new QVBoxLayout(this);
  horizontalLayout=new QHBoxLayout;
  verticalLayout->addStretch(1);
//  horizontalLayout->addItem(spacer);
  horizontalLayout->addWidget(btn1);
  horizontalLayout->addWidget(btn2);
verticalLayout->addLayout(horizontalLayout);
this->setLayout(verticalLayout);
    //verticalLayout->addItem(spacer);
    //verticalLayout->addWidget(btn1);
    //verticalLayout->addWidget(btn2);
}

Widget::~Widget()
{

}

void Widget::paintEvent(QPaintEvent * /* event */)
{
    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing, true);


    draw(&painter);
}

void Widget::draw(QPainter *painter)
{


}

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