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<H1>[Gtk-sharp-list] Simple Gtk window crash when Entry's text refreshed via a timer</H1>
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<B>Peter Johanson</B>
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<A HREF="mailto:gtk-sharp-list%40lists.ximian.com?Subject=%5BGtk-sharp-list%5D%20Simple%20Gtk%20window%20crash%20when%20Entry%27s%0A%09text%09refreshed%20via%20a%20timer&In-Reply-To=1286466235189-2967045.post%40n4.nabble.com"
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TITLE="[Gtk-sharp-list] Simple Gtk window crash when Entry's text refreshed via a timer">peter at peterjohanson.com
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</A><BR>
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<I>Thu Oct 7 11:57:42 EDT 2010</I>
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<P><UL>
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</A></li>
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<LI> <B>Messages sorted by:</B>
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<a href="date.html#10534">[ date ]</a>
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<a href="thread.html#10534">[ thread ]</a>
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<a href="subject.html#10534">[ subject ]</a>
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<a href="author.html#10534">[ author ]</a>
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<!--beginarticle-->
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<PRE>Andrea,
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The System.Timers.Timer class fires it's events from a thread other than
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the "GUI thread", which causes issues with GTK+. You should use
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GLib.Timeout.Add for this purpose.
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See <A HREF="http://mono-project.com/Responsive_Applications">http://mono-project.com/Responsive_Applications</A> for further
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information.
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-pete
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On Thu, Oct 07, 2010 at 08:43:55AM -0700, andrea wrote:
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><i>
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</I>><i> I've build a really simple application using MonoDevelop 2.4 in OpenSuse
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</I>><i> (using VMWare image downloaded from mono website).
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</I>><i>
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</I>><i> My window contains a fixed container with an Entry widget named "Entry1".
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</I>><i>
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</I>><i> Finally I modified autogenerated C# code in MainWindows.cs adding the
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</I>><i> "bolded" code:
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</I>><i>
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</I>><i> using System;
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</I>><i> using Gtk;
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</I>><i> using System.Timers;
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</I>><i>
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</I>><i> public partial class MainWindow : Gtk.Window
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</I>><i> {
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</I>><i> Timer x=new Timer();
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</I>><i>
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</I>><i> public MainWindow () : base(Gtk.WindowType.Toplevel)
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</I>><i> {
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</I>><i> Build ();
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</I>><i> x.Elapsed+=tmrElapsed;
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</I>><i> x.Interval=500;
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</I>><i> x.Enabled=true;
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</I>><i> }
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</I>><i>
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</I>><i> private void tmrElapsed (object sender, ElapsedEventArgs e)
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</I>><i> {
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</I>><i> entry1.Text=DateTime.Now.ToString();
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</I>><i> }
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</I>><i>
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</I>><i> protected void OnDeleteEvent (object sender, DeleteEventArgs a)
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</I>><i> {
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</I>><i> Application.Quit ();
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</I>><i> a.RetVal = true;
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</I>><i> }
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</I>><i> }
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</I>><i>
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</I>><i> Finally I run it and I can see the window with the entry containing the
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</I>><i> current date and time, but after 1 or 2 seconds the application crash
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</I>><i> showing the trace attached ....
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</I>><i>
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</I>><i> What's wrong?
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</I>><i>
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</I>><i> Thanks in advance. <A HREF="http://mono.1490590.n4.nabble.com/file/n2967045/tmp.txt">http://mono.1490590.n4.nabble.com/file/n2967045/tmp.txt</A>
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</I>><i> tmp.txt
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</I>><i> --
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</I>><i> View this message in context: <A HREF="http://mono.1490590.n4.nabble.com/Simple-Gtk-window-crash-when-Entry-s-text-refreshed-via-a-timer-tp2967045p2967045.html">http://mono.1490590.n4.nabble.com/Simple-Gtk-window-crash-when-Entry-s-text-refreshed-via-a-timer-tp2967045p2967045.html</A>
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</I>><i> Sent from the Mono - Gtk# mailing list archive at Nabble.com.
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</I>><i> _______________________________________________
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</I>><i> Gtk-sharp-list maillist - <A HREF="http://lists.ximian.com/mailman/listinfo/gtk-sharp-list">Gtk-sharp-list at lists.ximian.com</A>
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</I>><i> <A HREF="http://lists.ximian.com/mailman/listinfo/gtk-sharp-list">http://lists.ximian.com/mailman/listinfo/gtk-sharp-list</A>
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</I>><i>
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</I>
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--
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</PRE>
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