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qobject_cast<mainWindow *>(parent()->parent()->parent())->ui.actNumberSklad->text();

qobject_cast<mainWindow *>(parent()->parent()->parent())->ui.actTovCat;

	mainWindow *w = qobject_cast<mainWindow *>(parent()->parent()->parent());
		if (w)
		{
			dirCount = w->ui.actNumberSklad->text();
		}
		else
		{	
			QMessageBox::information(0, "", "Khernya kakaya-to");
		}

fMyOrg *child = new fMyOrg;
child->dirCount = dirCount;

struct Settings {
  double mRatio;
  ...
};

void SetupWidget::DoSomething( void )
{
  int mode = GetCurrentMode();
  ...
  if (useSettings) {
   Settings theS; 
   MainWindow::Instance()->BuildSettings(&theS, mode);
   if (theS.mRatio != 1.0) {
    ...
   }
  }
}

object_cast<mainWindow *>(parent()->parent()->parent())->ui.actNumberSklad->setText(dirCount);

signals:
	void changedString( const QString &str );

emit changedString(dirCount);

private slots:
void setDirCount(const QString &str );

void mainWindow::setDirCount(const QString &str)
{
	dirCount = str;
	ui.actNumberSklad->setText(dirCount);
}

fMyOrg *child = new fMyOrg;
	connect (child, SIGNAL(changedString( const QString & )), this, SLOT(setDirCount( const QString & )));
	child->dirCount = dirCount;

class fMyOrg;
...
class mainWindow : public QMainWindow
{
Q_OBJECT
public:
mainWindow();
QString	dirCount;
...
private:
fMyOrg			*createFormMyOrg();
private slots:
void setDirCount(const QString &str );
};

fMyOrg *mainWindow::createFormMyOrg()
{
	fMyOrg *child = new fMyOrg;
	g_fMyOrg = child;
	connect (child, SIGNAL(changedString( const QString & )), this, SLOT(setDirCount( const QString & )));
	child->dirCount = dirCount;
	workspace->addWindow(child);
	return child;
}
void mainWindow::setDirCount(const QString &str)
{
	dirCount = str;
	ui.actNumberSklad->setText(dirCount);
}

class fMyOrg : public QWidget
{
	Q_OBJECT
public:
QString dirCount;
...
signals:
	void changedString( const QString &str );
};

void fMyOrg::pbAddSkladClicked()
{
...
emit changedString(dirCount);
}