将项目数据附加到菜单项

Question

创建上下文菜单正在进行中：

CMenu   mnuContext;
CMenu   *pMnuPopup, *pMnuSwap;

mnuContext.LoadMenu(IDR_MENU_MWB_SWAP);
pMnuPopup = mnuContext.GetSubMenu(0);
if (pMnuPopup != nullptr)
{
    pMnuSwap = pMnuPopup->GetSubMenu(0);
    if (pMnuSwap != nullptr)
    {
        CMenu *pMnuChairman = pMnuSwap->GetSubMenu(0);
        if (pMnuChairman != nullptr)
            pMnuChairman->DeleteMenu(0, MF_BYPOSITION);
        //#TODO Init other pop up menus

        int iChairman = -1; // Reset counters
        for (int i = 0; i < m_cbDates.GetCount(); i++)
        {
            CString strDate, strMenuText;
            m_cbDates.GetLBText(i, strDate);

            CChristianLifeMinistryEntry *pEntry = static_cast<CChristianLifeMinistryEntry*>(m_cbDates.GetItemDataPtr(i));
            if (pEntry->GetChairman() != _T("") && pMnuChairman != nullptr && i != m_iDateIndex)
            {
                iChairman++;
                strMenuText = pEntry->GetChairman() + _T(" (") + strDate + _T(")");
                pMnuChairman->InsertMenu(iChairman, MF_BYPOSITION, ID_SWAP_CHAIRMAN_ITEM + iChairman, strMenuText);
                //# TODO Can I assign the pointer of pEntry? Or the "i" variable?
            }
        }

        pMnuPopup->TrackPopupMenu(TPM_LEFTALIGN | TPM_LEFTBUTTON,
            pMsg->pt.x, pMsg->pt.y, this, nullptr);
    }
}

如您所见，我正在创建这样的菜单项：

pMnuChairman->InsertMenu(iChairman, MF_BYPOSITION, ID_SWAP_CHAIRMAN_ITEM + iChairman, strMenuText);

我可以将 i 变量与此菜单项相关联吗？或者，或者实际指针 (pEntry)?

Answer 1

不清楚为什么需要将菜单项与变量相关联 i。我认为您需要的是在单击动态菜单项时处理消息。对于静态菜单项，您可以在消息映射中使用 ON_COMMAND and ON_UPDATE_COMMAND_UI 宏。

在您的情况下，您可以做的是在消息映射中使用 ON_COMMAND_RANGE 为菜单项范围设置一个处理程序：

BEGIN_MESSAGE_MAP(CYourView, CFormView)
  ON_COMMAND_RANGE(ID_SWAP_CHAIRMAN_ITEM, ID_SWAP_CHAIRMAN_ITEM + 100, OnChairmanClick)
END_MESSAGE_MAP()

您的 OnChairmanClick 函数将具有以下语法：

void CYourView::OnChairmanClick(UINT nID)

您需要记住与主席关联的菜单项的 UID，例如在您的 CChristianLifeMinistryEntry 中，您可以为其添加一个 UID 成员。您还可以创建一个 CMap<UID, CChristianLifeMinistryEntry, UID, CChristianLifeMinistryEntry> 来存储 UID，以便更快地访问。

将项目数据附加到菜单项

Attach item data to a menu item

c++

mfc

menuitem