[Gtk-sharp-list] How to show custom window and do the computation in the background

[Christopher David Howie]

On 06/27/2010 11:58 AM, Christopher David Howie wrote:
> However, most operations you are going to perform (such as setting a 
> progress bar's value) can be done whether the dialog is shown or
> not. The changes will be visible once the dialog is shown.

And, actually, I should have also noted that the dialog will be shown at
the point that the delegates run, which I explained after this
paragraph.  Basically, in your click event handler (or whatever) you
will probably be doing something like this:

----------8<----------
var dialog = new ProgressDialog();

new Thread(delegate() {
   // This is where you would do your actual work.
   for (int i = 0; i < 1000; i++) {
      Application.Invoke(delegate { dialog.Progress = i / 1000d; });
      Thread.Sleep(100);
   }

   Application.Invoke(delegate { dialog.Destroy(); });
}).Start();

// It is *impossible* for any of the invoked delegates to be run
// here, because this method is running on the GLib main loop thread.

dialog.Show();
----------8<----------

Note that if you are really concerned (which you shouldn't be) then you
can also do this instead:

----------8<----------
var dialog = new ProgressDialog();
var thread = new Thread(delegate() { ... });

dialog.Show();
thread.Start();
----------8<----------

-- 
Chris Howie
http://www.chrishowie.com
http://en.wikipedia.org/wiki/User:Crazycomputers

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