在Qt中将文件移动到废纸篓/回收站

Question

是否有Qt函数将文件移动到回收站而不是真正删除它们,对于支持它的操作系统,还是我需要使用特定于操作系统的代码？

Answer 1

从Qt 5.15.0 Alpha开始，已添加此方法，这应该是您正在寻找的。

bool QFile::moveToTrash()

相应的代码更改可以在这里找到。

（这个问题很旧，https://bugreports.qt.io/browse/QTBUG-47703上的相应 Bugreport已经发布，但我目前缺乏评论的声誉，并发现这是一个有用的信息。）

Answer 2

Qt没有提供MoveToTrash.这是我的代码的一部分

对于Windows

#ifdef Q_OS_WIN32

#include "windows.h"

void MoveToTrashImpl( QString file ){
    QFileInfo fileinfo( file );
    if( !fileinfo.exists() )
        throw OdtCore::Exception( "File doesnt exists, cant move to trash" );
    WCHAR from[ MAX_PATH ];
    memset( from, 0, sizeof( from ));
    int l = fileinfo.absoluteFilePath().toWCharArray( from );
    Q_ASSERT( 0 <= l && l < MAX_PATH );
    from[ l ] = '\0';
    SHFILEOPSTRUCT fileop;
    memset( &fileop, 0, sizeof( fileop ) );
    fileop.wFunc = FO_DELETE;
    fileop.pFrom = from;
    fileop.fFlags = FOF_ALLOWUNDO | FOF_NOCONFIRMATION | FOF_NOERRORUI | FOF_SILENT;
    int rv = SHFileOperation( &fileop );
    if( 0 != rv ){
        qDebug() << rv << QString::number( rv ).toInt( 0, 8 );
        throw OdtCore::Exception( "move to trash failed" );
    }
}
#endif

对于Linux

#ifdef Q_OS_LINUX

bool TrashInitialized = false;
QString TrashPath;
QString TrashPathInfo;
QString TrashPathFiles;

void MoveToTrashImpl( QString file ){
    #ifdef QT_GUI_LIB
        if( !TrashInitialized ){
            QStringList paths;
            const char* xdg_data_home = getenv( "XDG_DATA_HOME" );
            if( xdg_data_home ){
                qDebug() << "XDG_DATA_HOME not yet tested";
                QString xdgTrash( xdg_data_home );
                paths.append( xdgTrash + "/Trash" );
            }
            QString home = QStandardPaths::writableLocation( QStandardPaths::HomeLocation );
            paths.append( home + "/.local/share/Trash" );
            paths.append( home + "/.trash" );
            foreach( QString path, paths ){
                if( TrashPath.isEmpty() ){
                    QDir dir( path );
                    if( dir.exists() ){
                        TrashPath = path;
                    }
                }
            }
            if( TrashPath.isEmpty() )
                throw Exception( "Cant detect trash folder" );
            TrashPathInfo = TrashPath + "/info";
            TrashPathFiles = TrashPath + "/files";
            if( !QDir( TrashPathInfo ).exists() || !QDir( TrashPathFiles ).exists() )
                throw Exception( "Trash doesnt looks like FreeDesktop.org Trash specification" );
            TrashInitialized = true;
        }
        QFileInfo original( file );
        if( !original.exists() )
            throw Exception( "File doesnt exists, cant move to trash" );
        QString info;
        info += "[Trash Info]\nPath=";
        info += original.absoluteFilePath();
        info += "\nDeletionDate=";
        info += QDateTime::currentDateTime().toString("yyyy-MM-ddThh:mm:ss.zzzZ");
        info += "\n";
        QString trashname = original.fileName();
        QString infopath = TrashPathInfo + "/" + trashname + ".trashinfo";
        QString filepath = TrashPathFiles + "/" + trashname;
        int nr = 1;
        while( QFileInfo( infopath ).exists() || QFileInfo( filepath ).exists() ){
            nr++;
            trashname = original.baseName() + "." + QString::number( nr );
            if( !original.completeSuffix().isEmpty() ){
                trashname += QString( "." ) + original.completeSuffix();
            }
            infopath = TrashPathInfo + "/" + trashname + ".trashinfo";
            filepath = TrashPathFiles + "/" + trashname;
        }
        QDir dir;
        if( !dir.rename( original.absoluteFilePath(), filepath ) ){
            throw Exception( "move to trash failed" );
        }
        File infofile;
        infofile.createUtf8( infopath, info );
    #else
        Q_UNUSED( file );
        throw Exception( "Trash in server-mode not supported" );
    #endif
}
#endif

Answer 3

目前还没有 API。

https://bugreports.qt.io/browse/QTBUG-181

该问题已关闭，修复版本为：未来的某个版本

编辑：一个新问题已在https://bugreports.qt.io/browse/QTBUG-47703上打开。

编辑显然它现在已在 5.15.0 Alpha 中完成bool QFile::moveToTrash()