Re: [Vala] pass signal to covered window

["Gilzad Hamuni" <gilli4 gmx net>]

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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