Russian Qt Forum

class MyClass : public QObject
{
 public:
 MyClass( QObject * parent ) : QObject( parent )
 {
 ...
 }
 private:
 ...
}

MyClass * mc = new MyClass( someWidget );

MyClass * mc = someWidget->findChild < MyClass * > ();

class MyProperties : public QObject
{
  Q_OBJECT
  Q_PROPERTY( int digit READ digit )
  Q_PROPERTY( QString errorString READ errorString )

public:
  MyProperties( QObject * parent );

  int digit() const;
  QString errorString() const;
};

...
QWidget * widget = get_widget_from_form();
QObject * properties = new MyProperties( widget );
properties->setObjectName( "my_properties" );
...

QObject * properties = get_widget_from_form()->findChild<QObject*>( "my_properties" );
if ( properties )
{
  int digit = propertiers->property( "digit" ).toInt();
  QString error = properties->property( "errorString" ).toString();
}

MyClass * mc = new MyClass( someWidget );

MyClass * mc = someWidget->findChild < MyClass * > ();

class MyProperties : public QObject 
{ 
  Q_OBJECT 
  Q_PROPERTY( int digit READ digit WRITE setDigit ) 
  Q_PROPERTY( QString errorString READ errorString WRITE setErrorString ) 

public:
  MyProperties( QObject * parent ) :
    QObject( parent ), digit_( 0 )
  {
  }

  int digit() const { return digit_; }
  void setDigit( int digit ) { digit_ = digit; }

  QString errorString() const { return error_string_; }
  void setErrorString( const QString & error ) { error_string_ = error; }

private:
  int digit_;
  QString error_string_;
};

...

QObject * properties = get_widget_from_form()->findChild<QObject*>( "my_properties" ); 
if ( properties ) 
{ 
  int digit = properties->property( "digit" ).toInt(); 
  QString error = properties->property( "errorString" ).toString();

  properties->setProperty( "digit", 123 );
  properties->setProperty( "errorString", "kernel panic" );
}

QHash<QObject*,MyCustomProperties>