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chxavmediafolderinfo.h：源码内容

							/************************************************************************
 * chxavmediafolderinfo.h
 * ----------------------
 *
 * Synopsis:
 * Contains the declaration of the CHXAvMediaFolderInfo class.  This class
 * encapsulates all the info regarding the files and folders pressent 
 * in memory or the mmc.
 *
 * Target:
 * Symbian OS
 *
 *
 * (c) 1995-2003 RealNetworks, Inc. Patents pending. All rights reserved.
 *
 *****************************************************************************/
#ifndef _chxavmediafolderinfo_h_
#define _chxavmediafolderinfo_h_
// Helix includes...
#include "hxstring.h"
#include "hxurl.h"
#include "hxwintyp.h"
#include "hxcom.h"
#include "hxcomm.h"
#include "hxmon.h"
// Includes from this project...
#include "chxbody.h"
#include "chxavrefptr.h"
#include "chxavfileutil.h"
#include "chxavmisc.h"
#include "chxavmiscconstants.h"
#include "chxsmartptr.h"
// class CHXAvMediaFolderInfo...
class CHXAvMediaFolderInfo : 
    public CHXBody
{
public:
    // ctor and dtor
    CHXAvMediaFolderInfo();
    virtual ~CHXAvMediaFolderInfo();
private:
    // disallow assignment and copy
    CHXAvMediaFolderInfo(const CHXAvMediaFolderInfo& rhs);
    CHXAvMediaFolderInfo& operator=(const CHXAvMediaFolderInfo& rhs);
public:
    // types
    enum PathCreateType
    {
        PATH_ENSURE,
        PATH_OPTIONAL
    };
    enum StateFlags
    {
        STATE_CHANGED   = 0x01,
        VOLID_CHANGED   = 0x02
    };
    // methods
    void InitL(const TDesC& rootPath, PathCreateType pathType);
    const CHXAvFile::DriveInfo& GetDriveInfo() const;
    void SetCurrentPathL(const TDesC& path);
    const TDesC& GetRoot() const;
    const TDesC& GetCurrentPath() const;
    bool IsMmcFolder() const;
    HBufC* AllocListDescriptionL() const;
    bool IsCurrentPathValid() const;
    void UpdateDriveInfo();
    TUint32 UpdateDriveInfoCheckState();
private:
// implementation
private:
// data
    refptr<HBufC>       m_spRootPath;
    refptr<HBufC>       m_spCurrentPath;
    CHXAvFile::DriveInfo   m_driveInfo;   
};
typedef CHXSmartPtr<CHXAvMediaFolderInfo> CHXAvMediaFolderInfoPtr; 
inline
bool CHXAvMediaFolderInfo::IsMmcFolder() const
{
    return m_driveInfo.idxDrive == CHXAvMisc::KIdxMmcDrive;
}
///////////////////////////////////
// absolute root path
inline
const TDesC& CHXAvMediaFolderInfo::GetRoot() const
{
    return *m_spRootPath;
}
///////////////////////////////////
// current folder, relative to root
inline
const TDesC& CHXAvMediaFolderInfo::GetCurrentPath() const
{
    HX_ASSERT(m_spCurrentPath);
    return *m_spCurrentPath;
}
///////////////////////////////////
// get info from last drive check
inline
void CHXAvMediaFolderInfo::UpdateDriveInfo()
{
    m_driveInfo = CHXAvFile::GetDriveInfo(*m_spRootPath);
}
///////////////////////////////////
// get info from last drive check
inline
const CHXAvFile::DriveInfo& CHXAvMediaFolderInfo::GetDriveInfo() const
{
    return m_driveInfo;
}
#endif // _chxavmediafolderinfo_h_

						