C++ GetMDIParent函数代码示例

void wxMDIChildFrame::InternalSetMenuBar()
{
    wxMDIParentFrame * const parent = GetMDIParent();

    MDIInsertWindowMenu(parent->GetClientWindow(),
                     m_hMenu, GetMDIWindowMenu(parent));
}

void wxMDIChildFrame::Maximize(bool maximize)
{
    wxMDIParentFrame * const parent = GetMDIParent();
    if ( parent && parent->GetClientWindow() )
    {
        if ( !IsShown() )
        {
            // Turn off redrawing in the MDI client window because otherwise
            // maximizing it would also show it and we don't want this for
            // hidden windows.
            ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_SETREDRAW,
                          FALSE, 0L);
        }

        ::SendMessage(GetWinHwnd(parent->GetClientWindow()),
                      maximize ? WM_MDIMAXIMIZE : WM_MDIRESTORE,
                      (WPARAM)GetHwnd(), 0);

        if ( !IsShown() )
        {
            // Hide back the child window shown by maximizing it.
            ::ShowWindow(GetHwnd(), SW_HIDE);

            // Turn redrawing in the MDI client back on.
            ::SendMessage(GetWinHwnd(parent->GetClientWindow()), WM_SETREDRAW,
                          TRUE, 0L);
        }
    }
}

bool wxMDIChildFrame::HandleMDIActivate(long WXUNUSED(activate),
                                        WXHWND hwndAct,
                                        WXHWND hwndDeact)
{
    wxMDIParentFrame * const parent = GetMDIParent();

    WXHMENU hMenuToSet = 0;

    bool activated;

    if ( m_hWnd == hwndAct )
    {
        activated = true;
        parent->SetActiveChild(this);

        WXHMENU hMenuChild = m_hMenu;
        if ( hMenuChild )
            hMenuToSet = hMenuChild;
    }
    else if ( m_hWnd == hwndDeact )
    {
        wxASSERT_MSG( parent->GetActiveChild() == this,
                      wxT("can't deactivate MDI child which wasn't active!") );

        activated = false;
        parent->SetActiveChild(NULL);

        WXHMENU hMenuParent = parent->m_hMenu;

        // activate the the parent menu only when there is no other child
        // that has been activated
        if ( hMenuParent && !hwndAct )
            hMenuToSet = hMenuParent;
    }
    else
    {
        // we have nothing to do with it
        return false;
    }

    if ( hMenuToSet )
    {
        MDISetMenu(parent->GetClientWindow(),
                   (HMENU)hMenuToSet, GetMDIWindowMenu(parent));
    }

    wxActivateEvent event(wxEVT_ACTIVATE, activated, m_windowId);
    event.SetEventObject( this );

    ResetWindowStyle(NULL);

    return HandleWindowEvent(event);
}

void wxMDIChildFrame::DoGetPosition(int *x, int *y) const
{
  RECT rect;
  GetWindowRect(GetHwnd(), &rect);
  POINT point;
  point.x = rect.left;
  point.y = rect.top;

  // Since we now have the absolute screen coords,
  // if there's a parent we must subtract its top left corner
  wxMDIParentFrame * const mdiParent = GetMDIParent();
  ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);

  if (x)
      *x = point.x;
  if (y)
      *y = point.y;
}

// Set the client size (i.e. leave the calculation of borders etc.
// to wxWidgets)
void wxMDIChildFrame::DoSetClientSize(int width, int height)
{
  HWND hWnd = GetHwnd();

  RECT rect;
  ::GetClientRect(hWnd, &rect);

  RECT rect2;
  GetWindowRect(hWnd, &rect2);

  // Find the difference between the entire window (title bar and all)
  // and the client area; add this to the new client size to move the
  // window
  int actual_width = rect2.right - rect2.left - rect.right + width;
  int actual_height = rect2.bottom - rect2.top - rect.bottom + height;

#if wxUSE_STATUSBAR
  if (GetStatusBar() && GetStatusBar()->IsShown())
  {
    int sx, sy;
    GetStatusBar()->GetSize(&sx, &sy);
    actual_height += sy;
  }
#endif // wxUSE_STATUSBAR

  POINT point;
  point.x = rect2.left;
  point.y = rect2.top;

  // If there's an MDI parent, must subtract the parent's top left corner
  // since MoveWindow moves relative to the parent
  wxMDIParentFrame * const mdiParent = GetMDIParent();
  ::ScreenToClient(GetHwndOf(mdiParent->GetClientWindow()), &point);

  MoveWindow(hWnd, point.x, point.y, actual_width, actual_height, (BOOL)true);

  wxSize size(width, height);
  wxSizeEvent event(size, m_windowId);
  event.SetEventObject( this );
  HandleWindowEvent(event);
}

bool wxMDIChildFrame::MSWTranslateMessage(WXMSG* msg)
{
    // we must pass the parent frame to ::TranslateAccelerator(), otherwise it
    // doesn't do its job correctly for MDI child menus
    return MSWDoTranslateMessage(GetMDIParent(), msg);
}