Progress indicator for large unzip

General
1

Anyone have a recommendation on how to display progress unzipping a file or at least a way of knowing when it’s complete? The inbuilt folderitem.zip works well but is silent. Running under Windows.

2

It’s not possible at the moment. You should be adding a feature request.

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3

Will do. Thanks Martin.

4

If you have plugins you can calculate your progress by getting the total file count and then incrementing progress for each one unzipped.

EinhugurZipArchives.ZipArchive.EntryCount
ArchiverMBS.FileCount

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5

It would be great to have this progress in Folderitem.CopyTo method too.

6

You could ask Windows to do that for you

Public Function UnzipWithOS(zipArchive As FolderItem, destination As FolderItem) As Boolean
  Var isSuccessful As Boolean
  
  if zipArchive <> nil AND zipArchive.Exists AND destination <> nil AND destination.Exists then
    
    #IF TargetWin32
      var sourceParams( 1 ) as variant
      sourceParams( 1 ) = zipArchive.NativePath
      
      var unzipParams( 1 ) as variant
      unzipParams( 1 ) = destination.NativePath
      
      var copyHereOpts as integer
      
      var shellApp as new OLEObject( "Shell.Application" )
      var sourceObj as OLEObject = shellApp.Invoke( "NameSpace", sourceParams )
      var unzipObj as OLEObject  = shellApp.Invoke( "NameSpace", unzipParams )
      unzipObj.CopyHere( sourceObj.Items, copyHereOpts )
      
      isSuccessful = destination.Exists
    #ENDIF
    
  end if
  
  RETURN isSuccessful
End Function
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7

I have been using the Chilkat plugin for this. In the Zip class there’s an ExtractAsync method that allows you to query the Task for progress information with a timer. It does require the paid version, so not for everyone. I believe MBS has a zip extraction class too.

Of course you could always shell to 7zip, peazip, info-zip or some other public domain extractor and read the progress from the shell.

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