Gtk4::entry - catch mouse events

[Schaubi]

Good day,

how can I catch mouse button pressed/released events on a Gtk::Entry widget? I tried this:

...
Gtk::Entry *entry = Gtk::make_managed<Gtk::Entry>();
Glib::RefPtr<Gtk::GestureClick> m_first_button_click_controller;
sigc::connection m_first_button_click_connection;

m_VBox.append(*entry);

m_first_button_click_controller = Gtk::GestureClick::create();
m_first_button_click_controller->set_button(GDK_BUTTON_PRIMARY);
m_first_button_click_connection = m_first_button_click_controller->signal_pressed().connect(
		sigc::mem_fun(*this, &ExampleWindow::on_first_button_mouse_pressed));

entry->add_controller(m_first_button_click_controller);
...

void
ExampleWindow::on_first_button_mouse_pressed(int n_pos, double x, double y)
{
	std::cout << __PRETTY_FUNCTION__ << std::endl;
}

Unfortunately, unlike with other Widgets, this does not work with a Gtk::Entry. Does someone have a hint what I’m missing here?

Thanks and best regards,
Christian

[gwillems]

Hi,

The GtkEntry already catches and consumes click events, so your controller won’t be notified.

You have to set the propagation phase of m_first_button_click_controller to GTK_PHASE_CAPTURE to be able to catch the events before the GtkEntry default controller does.

More info about event propagation here: Gtk – 4.0: Overview of GTK input and event handling

[kjellahl (Kjell Ahlstedt)]

See also the example at examples/book/events/mouse/examplewindow.cc · master · GNOME / gtkmm-documentation · GitLab
where the controller is added to a Gtk::Button.

  mouse_click = Gtk::GestureClick::create();
  // This mouse event must be handled in the capture phase.
  // The GtkButton C class handles the event in the capture phase and
  // does not let it propagate to the bubble phase where events are
  // handled by default.
  mouse_click->set_propagation_phase(Gtk::PropagationPhase::CAPTURE);

[Schaubi]

Thank you!

Best regards,
Christian