Method Init

DuiLib/Control/UICombo.cpp:33–79

void CComboWnd::Init(CComboUI* pOwner)
{
    m_pOwner = pOwner;
    m_pLayout = NULL;
    m_iOldSel = m_pOwner->GetCurSel();

    // Position the popup window in absolute space
    SIZE szDrop = m_pOwner->GetDropBoxSize();
    RECT rcOwner = pOwner->GetPos();
    RECT rc = rcOwner;
    rc.top = rc.bottom;		// ������left��bottom��������������
    rc.bottom = rc.top + szDrop.cy;	// ���㵯�����ڸ߶�
    if( szDrop.cx > 0 ) rc.right = rc.left + szDrop.cx;	// ���㵯�����ڿ���

    SIZE szAvailable = { rc.right - rc.left, rc.bottom - rc.top };
    int cyFixed = 0;
    for( int it = 0; it < pOwner->GetCount(); it++ ) {
        CControlUI* pControl = static_cast<CControlUI*>(pOwner->GetItemAt(it));
        if( !pControl->IsVisible() ) continue;
        SIZE sz = pControl->EstimateSize(szAvailable);
        cyFixed += sz.cy;
    }
    cyFixed += 4; // CVerticalLayoutUI Ĭ�ϵ�Inset ����
    rc.bottom = rc.top + MIN(cyFixed, szDrop.cy);

    ::MapWindowRect(pOwner->GetManager()->GetPaintWindow(), HWND_DESKTOP, &rc);

    MONITORINFO oMonitor = {};
    oMonitor.cbSize = sizeof(oMonitor);
    ::GetMonitorInfo(::MonitorFromWindow(*this, MONITOR_DEFAULTTOPRIMARY), &oMonitor);
    CDuiRect rcWork = oMonitor.rcWork;
    if( rc.bottom > rcWork.bottom ) {
        rc.left = rcOwner.left;
        rc.right = rcOwner.right;
        if( szDrop.cx > 0 ) rc.right = rc.left + szDrop.cx;
        rc.top = rcOwner.top - MIN(cyFixed, szDrop.cy);
        rc.bottom = rcOwner.top;
        ::MapWindowRect(pOwner->GetManager()->GetPaintWindow(), HWND_DESKTOP, &rc);
    }
    
    Create(pOwner->GetManager()->GetPaintWindow(), NULL, WS_POPUP, WS_EX_TOOLWINDOW, rc);
    // HACK: Don't deselect the parent's caption
    HWND hWndParent = m_hWnd;
    while( ::GetParent(hWndParent) != NULL ) hWndParent = ::GetParent(hWndParent);
    ::ShowWindow(m_hWnd, SW_SHOW);
    ::SendMessage(hWndParent, WM_NCACTIVATE, TRUE, 0L);
}

LPCTSTR CComboWnd::GetWindowClassName() const
{