title: Detecting that file is downloaded, moved and copied
body: <p>Is there an idea to handle that file downloaded by any browser or moved or copied from another location (not downloading or moving or coping)?</p>
  
  <p>Safari and Chrome add .(.*)download extension, so download finishing easily handled.
  Moving or coping are rapid processes so they can be handled by file size difference after some delay. But it also can be unreliable in some cases like firefox download process.</p>
  
  <p>Also I want cross-platform solution. I use Qt framework.</p>