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关于

The maxon::FileMonitor class can be used to watch a certain folder. If a file in that folder is changed, a delegate is called.

警告

The events observed and messages sent depend on the OS.

FileMonitor

maxon::FileMonitor::WatchDirectory() is used to watch the given folder.

// global instance of FileMonitorItemRef maxon::FileMonitorItemRef g_directoryWatch;

// ------------------------------------------------------------ // This function watches the given folder. // ------------------------------------------------------------ static maxon::Result<void> WatchFolder( const maxon::Url & url) { iferr_scope ;

// check argument if (url.IoDetect() != maxon::IODETECT::DIRECTORY ) return maxon::IllegalArgumentError( MAXON_SOURCE_LOCATION );

// lambda function called when a file is was changed auto folderActivity = []( const maxon::Url & watched, const maxon::Url & updated, maxon::FileMonitor::STATE state) { DiagnosticOutput ( "Some change in folder @." , watched); };

// watch folder and store FileMonitorItemRef g_directoryWatch = nullptr ; g_directoryWatch = maxon::FileMonitor::WatchDirectory (url, folderActivity) iferr_return ;