very simple alignment of dock on bottom edge

examples/dock/window/imp.rs

@@ -0,0 +1,54 @@
+use gtk4 as gtk;
+
+use glib::subclass::InitializingObject;
+use gtk::prelude::*;
+use gtk::subclass::prelude::*;
+use gtk::{gio, glib};
+use gtk::{CompositeTemplate, Entry, ListView};
+use once_cell::sync::OnceCell;
+
+// Object holding the state
+#[derive(CompositeTemplate, Default)]
+#[template(file = "window.ui")]
+pub struct Window {
+    #[template_child]
+    pub list_view: TemplateChild<ListView>,
+    pub model: OnceCell<gio::ListStore>,
+}
+
+// The central trait for subclassing a GObject
+#[glib::object_subclass]
+impl ObjectSubclass for Window {
+    // `NAME` needs to match `class` attribute of template
+    const NAME: &'static str = "LauncherWindow";
+    type Type = super::Window;
+    type ParentType = gtk::ApplicationWindow;
+
+    fn class_init(klass: &mut Self::Class) {
+        Self::bind_template(klass);
+    }
+
+    fn instance_init(obj: &InitializingObject<Self>) {
+        obj.init_template();
+    }
+}
+// Trait shared by all GObjects
+impl ObjectImpl for Window {
+    fn constructed(&self, obj: &Self::Type) {
+        // Call "constructed" on parent
+        self.parent_constructed(obj);
+
+        // Setup
+        obj.setup_model();
+        obj.setup_callbacks();
+        obj.setup_factory();
+    }
+}
+// Trait shared by all widgets
+impl WidgetImpl for Window {}
+
+// Trait shared by all windows
+impl WindowImpl for Window {}
+
+// Trait shared by all application
+impl ApplicationWindowImpl for Window {}