Re: Unexpected behaviour with multiple instances of meld

[Kai Willadsen <kai willadsen gmail com>]

On 13 June 2015 at 11:27, Peter Williams <pwil3058 gmail com> wrote:
> On 13/06/15 09:25, Kai Willadsen wrote:
> > On 8 June 2015 at 09:34, Peter Williams <pwil3058 gmail com> wrote:
> > Either way, could you please file a bug?
>
> OK. I was reluctant to do that without discussing it first.

Yeah that's all good. Thanks for the report. I suspect that reordering
some present() calls will fix this particular issue, but I'll see how
we go.

> > This is just weird. I'm sorry, but I don't have any guidance here. It
> > may be an odd interaction between GtkApplication and your window
> > manager? but we certainly don't do anything strange in Meld itself.
>
> It could be.  I don't use GtkApplication for my GUIs.  I just use a
> GtkWindow instance (launched from a Python script) for my main window.
>
> I don't know what other applications use but most of them (Geany, Firefox,
> Thunderbird, regexxer, gnometerminal, etc) don't exhibit this behaviour.
> However, I've just done some testing with Gnome terminal (which I'd never
> tried this with before) and it exhibits the same behaviour as meld which may
> help track down the problem.
>
> But there's a chance that it's just a side effect of the above bug and that
> it will go away when that's fixed.

Yeah, I'm going to guess that this is related to GtkApplication, which
implements single-instance logic among other things (possibly
including WM hints? I don't know).

If you're so inclined, you could try and reproduce with some sample
GtkApplication code and see what the story is, but I'd be extremely
surprised if this was a Meld-specific problem.

cheers,
Kai