Libadwaita gui (#19)

Major Update: Functional GUI Frontend!

src/frontend/gtk/window/imp.rs

@@ -0,0 +1,63 @@
+use std::{cell::{Cell, RefCell}, path::PathBuf};
+
+use glib::subclass::InitializingObject;
+use adw::{prelude::*, ActionRow};
+use adw::subclass::prelude::*;
+use gtk::{glib, Button, CompositeTemplate, ListBox, gio};
+
+#[derive(CompositeTemplate, Default)]
+#[template(resource = "/de/feschber/LanMouse/window.ui")]
+pub struct Window {
+    pub number: Cell<i32>,
+    #[template_child]
+    pub add_client_button: TemplateChild<Button>,
+    #[template_child]
+    pub client_list: TemplateChild<ListBox>,
+    #[template_child]
+    pub client_placeholder: TemplateChild<ActionRow>,
+    pub clients: RefCell<Option<gio::ListStore>>,
+    pub socket_path: RefCell<Option<PathBuf>>,
+}
+
+#[glib::object_subclass]
+impl ObjectSubclass for Window {
+    // `NAME` needs to match `class` attribute of template
+    const NAME: &'static str = "LanMouseWindow";
+    type Type = super::Window;
+    type ParentType = gtk::ApplicationWindow;
+
+    fn class_init(klass: &mut Self::Class) {
+        klass.bind_template();
+        klass.bind_template_callbacks();
+    }
+
+    fn instance_init(obj: &InitializingObject<Self>) {
+        obj.init_template();
+    }
+}
+
+#[gtk::template_callbacks]
+impl Window {
+    #[template_callback]
+    fn handle_button_clicked(&self, button: &Button) {
+        let number_increased = self.number.get() + 1;
+        self.number.set(number_increased);
+        button.set_label(&number_increased.to_string())
+    }
+}
+
+
+impl ObjectImpl for Window {
+    fn constructed(&self) {
+        self.parent_constructed();
+        let obj = self.obj();
+        obj.setup_icon();
+        obj.setup_clients();
+        obj.setup_callbacks();
+        obj.connect_stream();
+    }
+}
+
+impl WidgetImpl for Window {}
+impl WindowImpl for Window {}
+impl ApplicationWindowImpl for Window {}