CDefView::_OnFSNotify函数分析

进入CDefView::_OnFSNotify函数时状态栏

_UpdateStatusBar函数之后增加一个对象，变成7个对象。

LRESULT CDefView::_OnFSNotify(LONG lNotification, LPCITEMIDLIST* ppidl)
{
    LPITEMIDLIST pidl;
    LPCITEMIDLIST pidlItem;

    // we may be registered for notifications on pidls that are different from
    // the one returned by _GetViewPidl (ftp folder).
    switch (lNotification)
    {
    case SHCNE_DRIVEADD:
    case SHCNE_CREATE:
    case SHCNE_MKDIR:
        pidlItem = _pidlMonitor ? ILFindChild(_pidlMonitor, ppidl[0]) : NULL;
        pidl = _ObjectExists(pidlItem, FALSE);
        if (pidl)
        {
            _AddOrUpdateItem(pidlItem, pidl);
        }
        break;

    default:
        TraceMsg(TF_DEFVIEW, "DefView: unknown FSNotify %08lX, doing full update", lNotification);
        _FullViewUpdate(FALSE);
        break;
    }

    _UpdateStatusBar(FALSE);
    return 0;
}

第二部分：

//
//  File System Notification flags
//

#define SHCNE_RENAMEITEM          0x00000001L
#define SHCNE_CREATE              0x00000002L
#define SHCNE_DELETE              0x00000004L
#define SHCNE_MKDIR               0x00000008L
#define SHCNE_RMDIR               0x00000010L
#define SHCNE_MEDIAINSERTED       0x00000020L
#define SHCNE_MEDIAREMOVED        0x00000040L
#define SHCNE_DRIVEREMOVED        0x00000080L
#define SHCNE_DRIVEADD            0x00000100L
#define SHCNE_NETSHARE            0x00000200L
#define SHCNE_NETUNSHARE          0x00000400L
#define SHCNE_ATTRIBUTES          0x00000800L
#define SHCNE_UPDATEDIR           0x00001000L
#define SHCNE_UPDATEITEM          0x00002000L
#define SHCNE_SERVERDISCONNECT    0x00004000L
#define SHCNE_UPDATEIMAGE         0x00008000L
#define SHCNE_DRIVEADDGUI         0x00010000L
#define SHCNE_RENAMEFOLDER        0x00020000L
#define SHCNE_FREESPACE           0x00040000L