[gears-users] desktop.getDragData() with other flavors other than application/x-gears-files

[David]

With Google Gears, when a file is drag and drop, we can access the
file name and its content, with desktop.getDragData(), but right now
it only support one flavor, application/x-gears-files:
http://www.google.com/codesearch/p?hl=en#nJHaZQ1IJ84/trunk/gears/desktop/desktop.cc&q=application/x-gears-files%20package:http://gears\.googlecode\.com&l=911

It will be awesome if the drag and drop supports parsing other data
types, like an Outlook attachment and get the file name and file
content from the FileGroupDescriptor, which is similar to what .Net
Windows Form supports in 
http://www.codeproject.com/KB/cs/testemaildragdrop.aspx:


private void Form1_DragDrop(object sender,
        System.Windows.Forms.DragEventArgs e)
   {
     string [] fileNames = null;

     try
     {
       if ( e.Data.GetDataPresent(DataFormats.FileDrop,false) ==
true)
       {
         fileNames = (string []) e.Data.GetData
(DataFormats.FileDrop);
         // handle each file passed as needed
         foreach( string fileName in fileNames)
         {
           // do what you are going to do with each filename
         }
       }
       else if (e.Data.GetDataPresent("FileGroupDescriptor"))
       {
         //
         // the first step here is to get the filename
         // of the attachment and
         // build a full-path name so we can store it
         // in the temporary folder
         //

         // set up to obtain the FileGroupDescriptor
         // and extract the file name
         Stream theStream = (Stream) e.Data.GetData
("FileGroupDescriptor");
         byte [] fileGroupDescriptor = new byte[512];
         theStream.Read(fileGroupDescriptor,0,512);
         // used to build the filename from the FileGroupDescriptor
block
         StringBuilder fileName = new StringBuilder("");
         // this trick gets the filename of the passed attached file
         for(int i=76; fileGroupDescriptor[i]!=0; i++)
         {  fileName.Append(Convert.ToChar(fileGroupDescriptor[i]));}
         theStream.Close();
         string path = Path.GetTempPath();
             // put the zip file into the temp directory
         string theFile = path+fileName.ToString();
             // create the full-path name

         //
         // Second step:  we have the file name.
         // Now we need to get the actual raw
         // data for the attached file and copy it to disk so we work
on it.
         //

         // get the actual raw file into memory
         MemoryStream ms = (MemoryStream) e.Data.GetData(
             "FileContents",true);
         // allocate enough bytes to hold the raw data
         byte [] fileBytes = new byte[ms.Length];
         // set starting position at first byte and read in the raw
data
         ms.Position = 0;
         ms.Read(fileBytes,0,(int)ms.Length);
         // create a file and save the raw zip file to it
         FileStream fs = new FileStream(theFile,FileMode.Create);
         fs.Write(fileBytes,0,(int)fileBytes.Length);

         fs.Close();  // close the file

         FileInfo tempFile = new FileInfo(theFile);

         // always good to make sure we actually created the file
         if ( tempFile.Exists == true)
         {
           // for now, just delete what we created
           tempFile.Delete();
         }
         else
         {  Trace.WriteLine("File was not created!");}
       }

     }
     catch (Exception ex)
     {
       Trace.WriteLine("Error in DragDrop function: " + ex.Message);

       // don't use MessageBox here - Outlook or Explorer is
waiting !
     }

   }