add few macros

src/lib.rs

-#[cfg(test)]
-mod tests {
-    #[test]
-    fn it_works() {
-        assert_eq!(2 + 2, 4);
-    }
+#[macro_export]
+macro_rules! get_widget {
+    ($builder:expr, $wtype:ty, $name:ident) => {
+        let $name: $wtype = $builder.get_object(stringify!($name)).expect(&format!("Could not find widget \"{}\"", stringify!($name)));
+    };
+}
+
+#[macro_export]
+macro_rules! spawn {
+    ($future:expr) => {
+        let ctx = glib::MainContext::default();
+        ctx.spawn_local($future);
+    };
+}
+
+#[macro_export]
+macro_rules! send {
+    ($sender:expr, $action:expr) => {
+        if let Err(err) = $sender.send($action) {
+            error!("Failed to send \"{}\" action due to {}", stringify!($action), err);
+        }
+    };
+}
+
+#[macro_export]
+macro_rules! action {
+    ($actions_group:expr, $name:expr, $callback:expr) => {
+        let simple_action = gio::SimpleAction::new($name, None);
+        simple_action.connect_activate($callback);
+        $actions_group.add_action(&simple_action);
+    };
+}
+
+#[macro_export]
+macro_rules! stateful_action {
+    ($actions_group:expr, $name:expr, $value:expr, $callback:expr) => {
+        let simple_action = gio::SimpleAction::new_stateful($name, None, &$value.to_variant());
+        simple_action.connect_activate($callback);
+        $actions_group.add_action(&simple_action);
+    };
 }