CListCtrl RedrawItem函数中的问题.

本文介绍了CListCtrl RedrawItem函数中的问题.的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在为Windows CE5.0移动设备开发应用程序.每隔15毫秒，我将在CListCtrl中执行重绘操作.当CListCtrl重绘时，设备的可用物理内存减少了4kb.我不知道减少物理内存的原因.如果有人知道答案，请告诉我.提前谢谢.

以下是我的代码段.

I am developing application for Windows CE5.0 mobile device. Every 15 milliseconds, i am performing the redraw operation in CListCtrl. when the CListCtrl redraws, the available physical memory of the device is decreased by 4kb. i don''t the know the reason why physical memory is decreased. If any one know the answer please let me know. Thanks in advance.

Following is my code snippet.

//MESSAGE_MAP

ON_NOTIFY(LVN_GETDISPINFO, IDC_LISTMENUS, OnLvnGetdispinfoListmenus)

//Timer  function

void CDlgHijoMenus::Refrescar(int iRefrescoId)
{

   CScreenInfo *ptrScreenInfo;
   INT16U uwValue;
   CHmiApp * pApp = reinterpret_cast<CHmiApp *>(::AfxGetApp());
   CModbusAddrList * pModbusAddrList = CModbusAddrList::Instance();   
   int iIterPrpal = 0;

   ptrScreenInfo = pApp->GetCurrentScreenInfo ()->ptrChild;

   while (ptrScreenInfo != NULL)
   {
       if (ptrScreenInfo->GetOperationCommandInfo () != NULL)
       {
           uwValue = pModbusAddrList->ReadModbusValue (ptrScreenInfo->GetOperationCommandInfo ()->GetOpCmdModbusAddr ());
           if (!ptrScreenInfo->UpdateConditionalHide (uwValue))
           {
               m_listMenus.RedrawItems(iIterPrpal, iIterPrpal);
               iIterPrpal ++;
           }
       }
       else if (!ptrScreenInfo->IsHidden ())
       {
           m_listMenus.RedrawItems(iIterPrpal, iIterPrpal);
           iIterPrpal ++;
       }
       ptrScreenInfo = ptrScreenInfo->ptrSibling;
   }
   m_listMenus.SetItemCount (iIterPrpal);
}

//Redrawing function


void CDlgHijoMenus::OnLvnGetdispinfoListmenus(NMHDR *pNMHDR, LRESULT *pResult)
{

    LV_DISPINFO* pDispInfo = (LV_DISPINFO*)pNMHDR;
    // TODO: Add your control notification handler code here
    LV_ITEM *pItem = &(pDispInfo)->item; // Puntero al item
    int iItemCount = 0, iItemIndex = pItem->iItem; // Indice del item
    CString cstrTexto(_T(""));
    CModbusAddrList * pModbusAddrList = CModbusAddrList::Instance();
    ManejadorVariables * pmv = ManejadorVariables::Instancia();
    CScreenInfo *ptrScreenInfo;
    CHmiApp * pApp = reinterpret_cast<CHmiApp *>(::AfxGetApp());

    ptrScreenInfo = pApp->GetCurrentScreenInfo ()->ptrChild;

    if (pItem->mask & (LVIF_TEXT | LVIF_IMAGE | LVIF_PARAM))
    {
        if (pItem->iSubItem == 0)
        {
            while (ptrScreenInfo != NULL)
            {
                if (iItemCount == iItemIndex)
                {

                    cstrTexto.Format (_T("%s"), ptrScreenInfo->GetDescriptionName (pmv->m_iIdioma));
                    break;
                }
                ptrScreenInfo = ptrScreenInfo->ptrSibling;
                if ((ptrScreenInfo)&& (!(ptrScreenInfo->IsHidden ()|| ptrScreenInfo->GetConditionalHide ())))
                    iItemCount ++;
            }
            pItem->iImage = 0;
            lstrcpy(pItem->pszText, cstrTexto);
        }
    }
    *pResult = 0;
}

CListCtrl

CListCtrl RedrawItem函数中的问题.

问题描述

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