自学教程：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);}