Re: [Vala] pass signal to covered window

[Ben Iofel <iofelben gmail com>]

To emit signals in Vala, you just call them like methods

textView.button_press_event ();

On Fri, Feb 5, 2016 at 9:06 AM Gilzad Hamuni <gilli4 gmx net> wrote:

> Just for the integrity of this topic.
>
> One solution to pass/fire an event programmatically is to use
> GLib.Signal.emit_by_name(), e.g.:
>
> drawingArea.button_press_event.connect( (event) => {
> GLib.Signal.emit_by_name(textView, "button-press-event", event); } );
>
> However, if the signal of interest expects a callback with a boolean
> return value (button-press-event does), you'll get the warning "value
> location for 'gboolean' passed as NULL".
> If I try to provide the value 5 (that is G_TYPE_BOOLEAN) as the fourth
> parameter for emit_by_name(), then the application crashes right after
> emitting the signal.
> I don't quite know how to translate/use GLib's signal_emitv() to/in Vala
> either. But for now I got my problem solved without passing signals at all.
>
> Best,
>
> gilzad
>
>
>
> > Gesendet: Montag, 01. Februar 2016 um 18:22 Uhr
> > Von: "Gilzad Hamuni" <gilli4 gmx net>
> > An: Vala-list <vala-list gnome org>
> > Betreff: [Vala] pass signal to covered window
> >
> > Hi list,
> >
> > if I have two windows layered on top of each other, the lower window
> can't fetch the mouse signals as these will go to the upper one. How can I
> pass the e.g. a button_pressed event on to the lower layer?
> > TextView textView = new TextView();
> >
> > DrawingArea drawingArea = new DrawingArea();
> >
> > fixedWindow = new Gtk.Fixed();
> > fixedWindow.put(textView, 0, 0);
> > fixedWindow.put(drawingArea, 0, 0);//putting drawing area on top of text
> view
> > drawingArea.button_press_event.connect( ... );// How can I fire a
> button_press event to the textView?
> > Thanks in advance,
> >
> > gilzad
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