Vala hide Gtk.InfoBar after a few seconds - glib

Question

In my Vala program I'm showing a Gtk.InfoBar when the user clicked a button.
Now I want to autohide the Gtk.InfoBar after a few seconds and put the focus back to the default Gtk.Entry.
After some research I think it is best to do this with GLib.Timeout, but the Valadoc.org-Documentation on this is not very helpful.
Also I was not able to find some Examples on the Internet.
Can someone tell me how to do this?
This is my source:
namespace Zeiterfassunggtk {
[GtkTemplate (ui = "/org/gnome/Zeiterfassunggtk/window.ui")]
public class Window : Gtk.ApplicationWindow {
[GtkChild]
Gtk.TreeView treeview1 = new Gtk.TreeView ();
[GtkChild]
Gtk.Button refreshbutton;
[GtkChild]
Gtk.MenuButton menubutton;
[GtkChild]
Gtk.Button menubuttonrefresh;
[GtkChild]
Gtk.Button menubuttonsave;
[GtkChild]
Gtk.Button menubuttonquit;
[GtkChild]
Gtk.InfoBar infobar1;
[GtkChild]
Gtk.Label infobar1label;
[GtkChild]
Gtk.Entry user_entry;
[GtkChild]
Gtk.Entry job_entry;
[GtkChild]
Gtk.Button addbutton;
Gtk.TreeIter iter;
Gtk.ListStore liststore1 = new Gtk.ListStore (3, typeof (string), typeof (string), typeof (string));
private void setup_treeview (Gtk.TreeView treeview1) {
treeview1.set_model (liststore1);
treeview1.insert_column_with_attributes (-1, "Name", new Gtk.CellRendererText (), "text", 0, null);
treeview1.insert_column_with_attributes (-1, "Job", new Gtk.CellRendererText (), "text", 1, null);
treeview1.insert_column_with_attributes (-1, "Time", new Gtk.CellRendererText (), "text", 2, null);
liststore1.append (out iter);
liststore1.set (iter, 0, "Gerald", 1, "Job1", 2, "2018-01-01 18:23", -1);
}
void refresh () {
liststore1.append (out iter);
liststore1.set (iter, 0, "Gerald", 1, "Job1", 2, "2018-01-01 18:23", -1);
infobar1.set_revealed (true);
infobar1label.set_label ("Refreshed!");
}
void save () {
liststore1.append (out iter);
liststore1.set (iter, 0, "Gerald", 1, "Job2", 2, "2018-01-01 24:00", -1);
user_entry.set_text ("");
job_entry.set_text ("");
user_entry.grab_default ();
infobar1.set_revealed (true);
infobar1label.set_label ("Saved!");
}
void hideinfobar () {
infobar1.set_revealed (false);
infobar1label.set_label ("Close");
}
public Window (Gtk.Application app) {
Object (application: app);
this.maximize ();
this.setup_treeview (treeview1);
// Don't show infobar1 on start
infobar1.set_revealed (false);
// Close infobar1 when Esc is hit.
infobar1.close.connect (this.hideinfobar);
// Close infobar1 when the close button is clicked.
infobar1.response.connect (this.hideinfobar);
refreshbutton.clicked.connect (this.refresh);
menubuttonrefresh.clicked.connect (this.refresh);
menubuttonsave.clicked.connect (this.save);
menubuttonquit.clicked.connect (app.quit);
addbutton.clicked.connect (this.save);
job_entry.set_activates_default (true);
job_entry.activate.connect (this.save);
user_entry.activate.connect (job_entry.grab_focus_without_selecting);
this.show_all ();
}
}
}
You can find the full source on github.com

Answer 1

With the help of Jens Mühlenhoff this is a working code:
namespace Zeiterfassunggtk {
[GtkTemplate (ui = "/org/gnome/Zeiterfassunggtk/window.ui")]
public class Window : Gtk.ApplicationWindow {
[GtkChild]
Gtk.Button button1;
[GtkChild]
Gtk.InfoBar infobar1;
[GtkChild]
Gtk.Label infobar1label;
public void hideinfobar () {
infobar1.set_revealed (false);
infobar1label.set_label ("");
}
public void showinfobar (string message) {
infobar1label.set_label (message);
infobar1.set_revealed (true);
Timeout.add_seconds (5, () => {
this.hideinfobar ();
return false;
});
}
public Window (Gtk.Application app) {
Object (application: app);
// Don't show infobar1 on start
this.hideinfobar ();
// Close infobar1 when Esc is hit.
infobar1.close.connect (this.hideinfobar);
// Close infobar1 when the close button is clicked.
infobar1.response.connect (this.hideinfobar);
// Connect Button and show infobar1
button1.clicked.connect (() => {
this.showinfobar ("Message");
});
this.show_all ();
}
}
}

Answer 2

You can use GLib.Timeout like this:
Timeout.add_seconds (5, () => {
stdout.printf ("Hello from timeout");
return false;
});
This will print a message in approximately 5 seconds. It only works when a MainLoop is already running (which is the case for every Gtk application).