How to migrate the tooltip popup window to GTK4?

[taozuhong]

In GTK3, I could make a tooltip popup window, now I want to port them to GTK4, how to migrate them to GTK4

// GTK3
m_calltip_window = new Gtk.Window(Gtk.WindowType.POPUP);
m_calltip_window.set_type_hint(Gdk.WindowTypeHint.TOOLTIP);
m_calltip_window.default_width = 200;
m_calltip_window.default_height = 20;
m_calltip_window.realize();

// Port to GTK4
m_calltip_window = new Gtk.Window();
m_calltip_window.transient_for = code_view.root as Gtk.Window;
m_calltip_window.decorated = false;
m_calltip_window.titlebar = null;
m_calltip_window.default_width = 200;
m_calltip_window.default_height = 20;
m_calltip_window.realize();

Now it has followed issues:

1. Window listed in the taskbar(it should not list in the taskbar)
2. Window is not the topmost window(Stay as the topmost window)

[ebassi (Emmanuele Bassi)]

You should have never done this. Window hints are X11-only, and your code would have broken the styling of your fake tooltips.

What you want to do is connect to the GtkWidget::query-tooltip signal of a widget, then use gtk_tooltip_set_custom() to set a custom widget inside the tooltip window.

[taozuhong]

the tooltip popup window is used for IntelliSense with GtkSourceView, needs to move with the cursor, but the tooltip can’t move by position, it is the problem.