[Gtk-sharp-list] Simple Gtk window crash when Entry's text refreshed via a timer

[Peter Johanson]

Andrea,

The System.Timers.Timer class fires it's events from a thread other than
the "GUI thread", which causes issues with GTK+. You should use
GLib.Timeout.Add for this purpose.

See http://mono-project.com/Responsive_Applications for further
information.

-pete

On Thu, Oct 07, 2010 at 08:43:55AM -0700, andrea wrote:
> 
> I've build a really simple application using MonoDevelop 2.4 in OpenSuse
> (using VMWare image downloaded from mono website).
> 
> My window contains a fixed container with an Entry widget named "Entry1".
> 
> Finally I modified autogenerated C# code in MainWindows.cs adding the
> "bolded" code:
> 
> using System;
> using Gtk;
> using System.Timers;
> 
> public partial class MainWindow : Gtk.Window
> {
> 	Timer x=new Timer();
> 	
> 	public MainWindow () : base(Gtk.WindowType.Toplevel)
> 	{
> 		Build ();
> 		x.Elapsed+=tmrElapsed;
> 		x.Interval=500;
> 		x.Enabled=true;
> 	}
> 
> 	private void tmrElapsed (object sender, ElapsedEventArgs e)
> 	{
> 		entry1.Text=DateTime.Now.ToString();
> 	}	
> 	
> 	protected void OnDeleteEvent (object sender, DeleteEventArgs a)
> 	{
> 		Application.Quit ();
> 		a.RetVal = true;
> 	}
> }
> 
> Finally I run it and I can see the window with the entry containing the
> current date and time, but after 1 or 2 seconds the application crash
> showing the trace attached ....
> 
> What's wrong?
> 
> Thanks in advance. http://mono.1490590.n4.nabble.com/file/n2967045/tmp.txt
> tmp.txt 
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