[Gtk-sharp-list] Issue with Mono/GTK# app after threading (NewB)

John Meadows john at meadowsonline.com
Tue Jul 12 05:44:22 EDT 2005

I am working on my first application written in Gnome/GTK# and mono
1.1.8 / Monodevelop; and I have run into an issue (if this is a NewB
issue, I apologize in advance).

This application has a couple of methods that are run via threads
(basically for filecopying, as my app. is a utility for managing MP3
files on my MP3 player), and I have tried to use the examples I have
seen online. Everything seems to work OK, but after I run one of these
threaded methods the first time I see one of the following issues:

1. If I display a FileSelection widget it comes up, but the text inside
the widget (the list of files basically) is not visible, even though it
appears to be there (as I have some debug code that fires off  a line to
the console whenever a file is selected, so I think something is there
even if it is not displaying)

2. The main window of my application also uses a Treeview control. In a
manner similar to #1 above, after running one of my threaded methods
once, if I run a method to populate the treeview, neither the column
headings or the test for the items in the Treeview appear (although
again I have debug code writing to the console that shows there are
items in the Treeview; it's just the text that is not appearing properly).

I am not sure where to go with this from a debugging point of view. I
have put some sample code below, as maybe the issue is there, but I
don't know, and of course I did not want to post everything. Is there
some other refresh I need to call?

Any suggestions on what to try would be most appreciated!! Thanks in

Here's some code

//copy single file to player
    void CopyFileToPlayer (object sender, EventArgs a)
        clearLabel(); // resets status labels on window
        lblStatus.Text = "File Copying in Progress...";
        buttonCopySingle.Sensitive = false;
        Thread oThread = new Thread(new ThreadStart(runSingleCopyThread));
        notify = new ThreadNotify (new ReadyEvent (ready));
        while (!oThread.IsAlive);

the method above calls:

//copy single file from playlist to player
private void runSingleCopyThread()
        fc = new FileCommands(); //this is an assembly  use for copying
the MP3 files
        lblStatus.Text = "File Copying in Progress...";
        fc.currentTrackFile = currentTrack;
        fc.mp3PlayerPath = txtPlayerPath.Text +
        if(fc.oppStatus != "Copying Files...")
            lblStatus.Text = fc.oppStatus;
        notify.WakeupMain ();

The notification method is:

//called when file copying threads are done
void ready ()
     buttonCopy.Sensitive = true;
     buttonCopySingle.Sensitive = true;
     lblStatus.Text = fc.oppStatus + ": " + fc.fileCopyCount  + "
file(s) Copied";

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