如何使CMFCToolBarComboBoxButton能够在垂直模式下工作？

Question

MFC功能包工具栏组合按钮(类CMFCToolBarComboBoxButton)在水平工具栏模式下工作非常完美.但在垂直布局模式下，它是简单的按下按钮，没有组合框功能。

如何使CMFCToolBarComboBoxButton能够在垂直模式下工作？

Answer 1

这是我的解决方案。我在垂直模式下重写了按钮的行为。现在按钮显示组合框在垂直模式下按下窗口。

在将组合框按钮添加到工具栏时，应在CVerticalableToolBarComboBoxButton方法中使用类CMFCToolBarComboBoxButton而不是CMFCToolBarComboBoxButton。

在下面的图片中，您可以看到按钮在水平和垂直模式下的行为。

水平模式

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垂直模式

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类代码：

class CVerticalableToolBarComboBoxButton
    : public CMFCToolBarComboBoxButton
{
    DECLARE_SERIAL(CVerticalableToolBarComboBoxButton)

public:
    typedef CMFCToolBarComboBoxButton TBase;

protected:

    bool                m_bDoVerticalMode;

public:
    CVerticalableToolBarComboBoxButton(bool bDoVerticalMode = true);
    CVerticalableToolBarComboBoxButton(UINT uiID, int iImage, DWORD dwStyle = CBS_DROPDOWNLIST, int iWidth = 0, bool bDoVerticalMode = true);

    virtual ~CVerticalableToolBarComboBoxButton();

    virtual void Serialize(CArchive& ar);

    virtual BOOL OnClick(CWnd* pWnd, BOOL bDelay = TRUE);
    virtual void OnChangeParentWnd(CWnd* pWndParent);
    virtual void OnMove();
    virtual void OnSize(int iSize);

protected:
    void AdjustVerticalRect();
};


/////////////////////////////////////////////////////////////////////////////
// CVerticalableToolBarComboBoxButton
IMPLEMENT_SERIAL(CVerticalableToolBarComboBoxButton, CVerticalableToolBarComboBoxButton::TBase, VERSIONABLE_SCHEMA | 1)

    CVerticalableToolBarComboBoxButton::CVerticalableToolBarComboBoxButton(bool bDoVerticalMode /*= true*/)
    : m_bDoVerticalMode(bDoVerticalMode)
{}

CVerticalableToolBarComboBoxButton::CVerticalableToolBarComboBoxButton(UINT uiID, int iImage, DWORD dwStyle /*= CBS_DROPDOWNLIST*/, int iWidth /*= 0*/, bool bDoVerticalMode /*= true*/)
    : TBase(uiID, iImage, dwStyle, iWidth)
    , m_bDoVerticalMode(bDoVerticalMode)
{}

CVerticalableToolBarComboBoxButton::~CVerticalableToolBarComboBoxButton()
{}

void CVerticalableToolBarComboBoxButton::Serialize(CArchive& ar)
{
    TBase::Serialize(ar);

    if (ar.IsLoading()) {
        ar >> m_bDoVerticalMode;
    }
    else {
        ar << m_bDoVerticalMode;
    }
}

BOOL CVerticalableToolBarComboBoxButton::OnClick(CWnd* pWnd, BOOL bDelay /*= TRUE*/)
{
    BOOL bRes = FALSE;

    bool bDefault = m_bHorz || !m_bDoVerticalMode;
    if (!bDefault) {
        if (IsFlatMode()) {

            if (m_pWndEdit == NULL) {
                m_pWndCombo->SetFocus();
            }
            else {
                m_pWndEdit->SetFocus();
            }

            m_pWndCombo->ShowDropDown();

            if (pWnd != NULL) {
                pWnd->InvalidateRect(m_rectCombo);
            }

            bRes = TRUE;
        }
    }

    if (bDefault) {
        bRes = TBase::OnClick(pWnd, bDelay);
    }

    return bRes;
}

void CVerticalableToolBarComboBoxButton::OnChangeParentWnd(CWnd* pWndParent)
{
    TBase::OnChangeParentWnd(pWndParent);

    if (!m_bHorz & m_bDoVerticalMode) {
        AdjustVerticalRect();
    }
}

void CVerticalableToolBarComboBoxButton::OnMove()
{
    TBase::OnMove();

    if (!m_bHorz & m_bDoVerticalMode) {
        AdjustVerticalRect();
    }
}

void CVerticalableToolBarComboBoxButton::OnSize(int iSize)
{
    TBase::OnSize(iSize);

    if (!m_bHorz & m_bDoVerticalMode) {
        AdjustVerticalRect();
    }
}

void CVerticalableToolBarComboBoxButton::AdjustVerticalRect()
{
    ASSERT(m_bDoVerticalMode);
    ASSERT(!m_bHorz);

    if (m_pWndCombo->GetSafeHwnd() == NULL || m_rect.IsRectEmpty()) {

        m_rectCombo.SetRectEmpty();
        m_rectButton.SetRectEmpty();
        return;
    }

    CMFCToolBar* pParentBar = nullptr;
    {
        CWnd* pNextBar = m_pWndCombo->GetParent();
        while (pParentBar == nullptr && pNextBar != nullptr) {
            pParentBar = DYNAMIC_DOWNCAST(CMFCToolBar, pNextBar);
            pNextBar = pNextBar->GetParent();
        }
    }

    if (IsCenterVert() && (!m_bTextBelow || m_strText.IsEmpty()) && (pParentBar != nullptr))
    {
        const int nRowHeight = pParentBar->GetRowHeight();
        const int yOffset = std::max<>(0, (nRowHeight - m_rect.Height()) / 2);

        m_rect.OffsetRect(0, yOffset);
    }

{
    CRect rect;
    m_pWndCombo->GetWindowRect(&rect);
    const int nWidth = std::max<>(rect.Width(), m_iWidth);

    rect.left = m_rect.left;
    rect.top = m_rect.top;
    rect.right = m_rect.left + nWidth;
    rect.bottom = m_rect.top + m_nDropDownHeight;

    if ((pParentBar != nullptr) && pParentBar->IsDocked()) {
        const UINT nID = pParentBar->GetParentDockSite()->GetDockSiteID();
        if (nID == AFX_IDW_DOCKBAR_RIGHT) {
            rect.left = m_rect.right - nWidth;
            rect.right = m_rect.right;
        }
    }

    m_pWndCombo->SetWindowPos(NULL, rect.left, rect.top, rect.Width(), rect.Height(), SWP_NOZORDER | SWP_NOACTIVATE);
    m_pWndCombo->SetEditSel(-1, 0);
}

{
    m_pWndCombo->GetWindowRect(&m_rectCombo);
    m_pWndCombo->ScreenToClient(&m_rectCombo);
    m_pWndCombo->MapWindowPoints(m_pWndCombo->GetParent(), &m_rectCombo);

}

if (m_bFlat) {
    m_rectButton = m_rectCombo;
}
else {
    m_rectButton.SetRectEmpty();
}
}

// CVerticalableToolBarComboBoxButton
/////////////////////////////////////////////////////////////////////////////