QTDesigner + QPaint [QT 4.4]

[pippofrank]

Hi, i have i little problem in painting with qt.
This is the situation: i draw my ui application using QTDesigner, so this is my code:

-----myqtapp.h-----

#include "ui_myqtapp.h" 
class myQtApp : public QWidget, private Ui::myQtAppDLG
{
  Q_OBJECT
public:
  myQtApp(QWidget *parent = 0);
public slots:
  void doSomething();
};

#include "ui_myqtapp.h" 
class myQtApp : public QWidget, private Ui::myQtAppDLG
{
  Q_OBJECT
public:
  myQtApp(QWidget *parent = 0);
public slots:
  void doSomething();
};

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-----myqtapp.cpp--------

#include <QtGui>
#include "myqtapp.h"
myQtApp::myQtApp(QWidget *parent)
{
  setupUi(this);
 
  connect( btnCrea, SIGNAL( clicked() ), this, SLOT( doSomething() ) );
}
 
void myQtApp::doSomething()
{
  //here i want to paint for example a simple point in my ui. In my UI there is a widget called "widget".
 
}

#include <QtGui>
#include "myqtapp.h"
myQtApp::myQtApp(QWidget *parent)
{
  setupUi(this);

  connect( btnCrea, SIGNAL( clicked() ), this, SLOT( doSomething() ) );
}

void myQtApp::doSomething()
{
  //here i want to paint for example a simple point in my ui. In my UI there is a widget called "widget".

}

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Can someone help me? i try many solution as QPaint, or creating a new Widget, but nothing...
Thanks