[MonoDevelop] One-shot dialogs from add-ins

[Casey Marshall]

On Mar 18, 2009, at 11:51 AM, Chris Howie wrote:

> On Wed, Mar 18, 2009 at 2:43 PM, Casey Marshall
> <casey.s.marshall at gmail.com> wrote:
>> Because, I want to do this:
>>
>>   Application.Invoke(delegate {
>>     run-dialog-and-get-result();
>>     signal-caller(); // only signal if not originally in GUI thread?
>>   });
>>   wait-to-be-signaled(); // only wait if not in GUI thread?
>>   use-result();
>
> If you use e.g. a ManualResetEvent then this will work exactly as you
> describe.  When you signal the caller (via Set()) this will get
> stored.  If you are running on the same thread, WaitOne will return
> immediately since you set it earlier.  If you are on separate threads
> then the WaitOne will return when Set is called.
>

OK, this seems to do it:

   string password = null;
   ManualResetEvent mre = new ManualResetEvent(false);
   Gtk.Application.Invoke(delegate {
     password = RunPasswordDialog();
     mre.Set();
   });
   Gtk.Main.Iteration(); // must do this to run the delegate above!
   mre.WaitOne();

Which was kind of non-obvious, but it works now, and no longer messes  
up the TreeView.

Thanks!