[Github-comments] [geany/geany] Split window file selector does not work (#1149)

[Colomban Wendling]

`:map-event` is ugly IMO, because it's a mere implementation detail at best.  Doing it properly would be listening to [`GtkMenuToolButton::show-menu`](https://developer.gnome.org/gtk3/stable/GtkMenuToolButton.html#GtkMenuToolButton-show-menu).  However, just like `GtkWidget::show` on the menu itself, it somehow is emitted twice under GTK >= 3.16.  See the [just-filed bug](https://bugzilla.gnome.org/show_bug.cgi?id=769287).

I'm not sure what to do.  This is clearly a GTK bug, so I'm not very keen on adding a hack just for it until it gets fixed.

> IIUC "show" is called everytime one calls gtk_widget_show() which can be more than once?

No, it's only emitted if the visible state changed.  What happens here is that the menu is effectively shown twice.

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