Hi to all!

I have following question regarding my problem. I've made QMainWindow and inside it I have one QDockWindow. Inside QDockWindow there is a tab widget with two tabs, one for QGraphicsView and other for QWebView. Now, QMainWindow is always maximized to full screen. I would also to maximize this docking window so it cannot be resized. Then, the sizes of QGraphicsView and QWebView also must be maximized. How do I achieve that. Here is the code of header:
Qt Code: 
  1. #ifndef CCENTRALWIDGET_H
  2. #define CCENTRALWIDGET_H
  3.  
  4. #include <QtGui/QDockWidget>
  5. #include <QtGui/QTabWidget>
  6. #include <QtGui/QGraphicsView>
  7. #include <QtWebKit/QWebView>
  8. #include <QtGui/QWidget>
  9. #include <QtGui/QSizePolicy>
  10. #include <QtCore/QString>
  11.  
  12. //#include "ui_ccentralwidget.h"
  13.  
  14. class CCentralWidget : public QDockWidget
  15. {
  16.     Q_OBJECT
  17.  
  18. public:
  19.     CCentralWidget(/*const QString& strTitle,*/
  20.                    QWidget *pParent=0,
  21.                    Qt::WindowFlags flags=0);
  22.     ~CCentralWidget();
  23.  
  24.     inline QTabWidget* optionsWidget() const
  25.         { return m_pOptionsWidget; };
  26.     inline QGraphicsView* merchandizeView() const
  27.         { return m_pMerchandizeView; };
  28.     inline QWebView* webpageView() const
  29.         { return m_pWebPageView; };
  30.     inline QWidget* merchandizeViewContainer() const
  31.         { return m_pMerchandizeViewContainer; };
  32.     inline QWidget* webpageContainer() const
  33.         { return m_pWebPageContainer; };
  34.  
  35. private:
  36.     void createOptionsWidget();    // method for creation options tab
  37.     void createMerchnadizeView();    // method for creating merchandize view
  38.     void createWebPageView();    // method for creating web page view
  39.  
  40. /*
  41. private:
  42.     Ui::CCentralWidgetClass ui;
  43. */
  44. private:
  45.     QTabWidget* m_pOptionsWidget;    // tabulator styled options widget
  46.     QGraphicsView* m_pMerchandizeView;    // merchandize graphics view
  47.     QWebView* m_pWebPageView;    // web page object
  48.     QWidget* m_pMerchandizeViewContainer;    // merchandize graphics view container widget
  49.     QWidget* m_pWebPageContainer;    // web page view container widget;
  50. };
  51.  
  52. #endif // CCENTRALWIDGET_H
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And here is implementation file:
Qt Code: 
  1. #include "ccentralwidget.h"
  2.  
  3. CCentralWidget::CCentralWidget(/*const QString& strTitle,*/
  4.                                QWidget *pParent,
  5.                                Qt::WindowFlags flags)
  6.     : QDockWidget(/*strTitle,*/
  7.                   pParent,
  8.                   flags)
  9. {
  10.     //ui.setupUi(this);
  11.     createOptionsWidget();    // creates options tabulator
  12.     createMerchnadizeView();    // creates merchandize view
  13.     createWebPageView();    // creates web page view
  14.  
  15.     optionsWidget()->addTab(merchandizeViewContainer(),
  16.                             tr("Room service"));
  17.     optionsWidget()->addTab(webpageContainer(),
  18.                             tr("City sightseeings"));
  19. }
  20.  
  21. CCentralWidget::~CCentralWidget()
  22. {
  23.     delete m_pOptionsWidget;    // deletes options widget
  24.     m_pOptionsWidget=0;    // safe mode
  25. }
  26.  
  27. void CCentralWidget::createOptionsWidget()
  28. {
  29.     m_pOptionsWidget=new QTabWidget(this);    // creates tab widget
  30.     Q_CHECK_PTR(m_pOptionsWidget);    // checks creation
  31.     optionsWidget()->setAutoFillBackground(true);    // sets background filling ON
  32.     optionsWidget()->setTabPosition(QTabWidget::West);    // sets tab position
  33.     optionsWidget()->setTabShape(QTabWidget::Rounded);    // sets tab shape
  34.     optionsWidget()->setFocusPolicy(Qt::NoFocus);    // disables focus
  35.     optionsWidget()->setContextMenuPolicy(Qt::NoContextMenu);    // disables context menu
  36.     setWidget(optionsWidget());    // sets widget contens
  37. }
  38.  
  39. void CCentralWidget::createMerchnadizeView()
  40. {
  41.     m_pMerchandizeViewContainer=new QWidget(optionsWidget());    // creates new widget
  42.     Q_CHECK_PTR(m_pMerchandizeViewContainer);    // checks creation
  43. /*
  44.     merchandizeViewContainer()->setGeometry(optionsWidget()->geometry().x(),
  45.                                             optionsWidget()->geometry().y(),
  46.                                             optionsWidget()->geometry().width(),
  47.                                             optionsWidget()->geometry().height());
  48. */
  49.  
  50.     m_pMerchandizeView=new QGraphicsView(merchandizeViewContainer());    // creates new merchandize view;
  51.     Q_CHECK_PTR(m_pMerchandizeView);    // checks creation
  52. /*
  53.     merchandizeView()->setSizePolicy(QSizePolicy(QSizePolicy::Fixed,
  54.                                                  QSizePolicy::Fixed));
  55.     merchandizeView()->setGeometry(merchandizeViewContainer()->geometry().x(),
  56.                                    merchandizeViewContainer()->geometry().y(),
  57.                                    merchandizeViewContainer()->geometry().width(),
  58.                                    merchandizeViewContainer()->geometry().height());
  59. */
  60. }
  61.  
  62. void CCentralWidget::createWebPageView()
  63. {
  64.     m_pWebPageContainer=new QWidget(optionsWidget());    // creates new widget
  65.     Q_CHECK_PTR(m_pWebPageContainer);    // checks creation
  66.     m_pWebPageView=new QWebView(webpageContainer());    // creates new web page view
  67.     Q_CHECK_PTR(m_pWebPageView);    // checks creation
  68.     webpageView()->setUrl(QString("http://www.google.com"));    // test page showing
  69. }
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That commented geometry statements do not work . Please help!