vgtk 0.3.0

use gio::{Menu, MenuItem};

/// Makes a [`gtk::Menu`][Menu] for you.
///
/// # Examples
///
/// ```rust,no_run
/// use vgtk::menu;
/// let menu_bar = menu()
///     .section_label("File",
///         menu()
///             .item("Open...", "win.open")
///             .item("Save", "win.save")
///             .item("Quit", "app.quit")
///     )
///     .section_label("Help",
///         menu()
///             .item("About...", "app.about")
///     ).build();
/// ```
///
/// [Menu]: https://gtk-rs.org/docs/gtk/struct.Menu.html
pub struct MenuBuilder {
    menu: Menu,
}

/// Construct a [`MenuBuilder`][MenuBuilder].
///
/// [MenuBuilder]: struct.MenuBuilder.html
pub fn menu() -> MenuBuilder {
    MenuBuilder { menu: Menu::new() }
}

impl MenuBuilder {
    /// Add a `MenuItem` to this menu.
    pub fn item(self, label: &str, action: &str) -> Self {
        let item = MenuItem::new(Some(label), Some(action));
        self.menu.append_item(&item);
        self
    }

    /// Add a section to this menu.
    pub fn section(self, section: MenuBuilder) -> Self {
        let section = section.build();
        self.menu.append_section(None, &section);
        self
    }

    /// Add a section with a label to this menu.
    pub fn section_label(self, label: &str, section: MenuBuilder) -> Self {
        let section = section.build();
        self.menu.append_section(Some(label), &section);
        self
    }

    /// Add a submenu to this menu.
    pub fn sub(self, label: &str, submenu: MenuBuilder) -> Self {
        let submenu = submenu.build();
        self.menu.append_submenu(Some(label), &submenu);
        self
    }

    /// Finalise the `MenuBuilder` and get your `Menu`.
    pub fn build(self) -> Menu {
        self.menu
    }
}