zng 0.21.8

Cross-platform GUI framework.
Documentation 
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#![cfg(feature = "menu")]

//! Menu widgets, properties and other types.
//!
//! ```no_run
//! use zng::prelude::*;
//! # APP.defaults().run_window("main", async {
//!
//! fn main_menu() -> UiNode {
//!     Menu!(ui_vec![
//!         SubMenu!(
//!             "File",
//!             ui_vec![
//!                 Button!(zng::app::NEW_CMD.scoped(WINDOW.id())),
//!                 Button!(zng::app::OPEN_CMD.scoped(WINDOW.id())),
//!                 Toggle! {
//!                     child = Text!("Auto Save");
//!                     checked = var(true);
//!                 },
//!                 Hr!(),
//!                 SubMenu!(
//!                     "Recent",
//!                     (0..10).map(|i| Button! {
//!                         child = Text!(formatx!("recent file {i}"));
//!                     })
//!                 ),
//!                 Hr!(),
//!                 Button!(zng::app::EXIT_CMD),
//!             ]
//!         ),
//!         SubMenu!(
//!             "Help",
//!             ui_vec![Button! {
//!                 child = Text!("About");
//!                 on_click = hn!(|_| {});
//!             }]
//!         ),
//!     ])
//! }
//!
//! Window! {
//!     child_top = main_menu();
//!     zng::app::on_new = hn!(|_| {});
//!     zng::app::on_open = hn!(|_| {});
//!     // ..
//! }
//! # });
//! ```
//!
//! The example above declares a [`Menu!`](struct@Menu) for a window, it demonstrates nested [`SubMenu!`](struct@sub::SubMenu),
//! and menu items, [`Button!`](struct@crate::button::Button),
//! [`Toggle!`](struct@crate::toggle::Toggle) and [`Hr!`](struct@crate::rule_line::hr::Hr). There is no menu item widget,
//! the `SubMenu!` widget re-styles button and toggle.
//!
//! # Context Menu
//!
//! This module also provides a context menu. The example below declares a context menu for the window, it will show
//! on context click, that is, by right-clicking the window, long pressing it or pressing the context menu key.
//!
//! ```
//! use zng::prelude::*;
//! # fn demo() {
//!
//! # let _ =
//! Window! {
//!     context_menu = ContextMenu!(ui_vec![
//!         Button!(zng::app::NEW_CMD.scoped(WINDOW.id())),
//!         Button!(zng::app::OPEN_CMD.scoped(WINDOW.id())),
//!         Toggle! {
//!             child = Text!("Auto Save");
//!             checked = var(true);
//!         },
//!         Hr!(),
//!         SubMenu!(
//!             "Help",
//!             ui_vec![Button! {
//!                 child = Text!("About");
//!                 on_click = hn!(|_| {});
//!             }]
//!         ),
//!         Hr!(),
//!         Button!(zng::app::EXIT_CMD),
//!     ]);
//! }
//! # ; }
//! ```
//!
//! # Full API
//!
//! See [`zng_wgt_menu`] for the full widget API.

pub use zng_wgt_menu::{ButtonStyle, IconButtonStyle, Menu, ToggleStyle, icon, icon_fn, panel_fn, shortcut_txt, style_fn};

use crate::widget::{widget, widget_set};

/// Default [`Menu!`] style.
///
/// Extends [`zng_wgt_menu::DefaultStyle!`] to cover more widgets. This is set as default in the `APP.default` using a window root extender.
///
/// [`Menu!`]: struct@Menu
/// [`zng_wgt_menu::DefaultStyle!`]: struct@zng_wgt_menu::DefaultStyle
#[widget($crate::menu::DefaultStyle)]
pub struct DefaultStyle(zng_wgt_menu::DefaultStyle);
impl DefaultStyle {
    fn widget_intrinsic(&mut self) {
        widget_set! {
            self;
            #[cfg(feature = "text_input")]
            crate::text_input::style_fn = crate::style::style_fn!(|_| TextInputStyle!());
        }
    }
}

/// Style applied to all [`TextInput!`] widgets inside [`Menu!`] root.
///
/// Gives the input a *toolbar-item* look.
///
/// [`TextInput!`]: struct@crate::text_input::TextInput
/// [`Menu!`]: struct@Menu
#[cfg(feature = "text_input")]
#[widget($crate::menu::TextInputStyle)]
pub struct TextInputStyle(crate::text_input::DefaultStyle);
#[cfg(feature = "text_input")]
impl TextInputStyle {
    fn widget_intrinsic(&mut self) {
        widget_set! {
            self;
            zng::layout::padding = 2;
            // return focus on enter
            zng::keyboard::on_pre_key_down = zng::handler::hn!(|args| {
                args.propagation.stop();
                zng::focus::FOCUS.focus_exit(true);
            });
        }
    }
}

/// Submenu widget and properties.
///
/// See [`zng_wgt_menu::sub`] for the full widget API.
pub mod sub {
    pub use zng_wgt_menu::sub::{
        ButtonStyle, DefaultStyle, SubMenu, SubMenuAncestors, SubMenuStyle, SubMenuWidgetInfoExt, ToggleStyle, TouchButtonStyle,
        column_width_padding, end_column, end_column_fn, end_column_width, hover_open_delay, is_open, start_column, start_column_fn,
        start_column_width,
    };
}

/// Context menu widget and properties.
///
/// See [`zng_wgt_menu::context`] for the full widget API.
pub mod context {
    pub use zng_wgt_menu::context::{
        ContextMenu, ContextMenuArgs, DefaultStyle, TouchStyle, context_menu, context_menu_anchor, context_menu_fn, disabled_context_menu,
        disabled_context_menu_fn, panel_fn, style_fn, touch_style_fn,
    };
}

/// Sub-menu popup widget and properties.
///
/// See [`zng_wgt_menu::popup`] for the full widget API.
pub mod popup {
    pub use zng_wgt_menu::popup::{DefaultStyle, SubMenuPopup, panel_fn, style_fn};
}