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// Copyright 2018 The xi-editor Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. //! Simple data-oriented GUI. //! //! Druid lets you build simple interactive graphical applications that //! can be deployed on windows, mac, and linux. //! //! Druid is built on top of [`druid-shell`], which implements all of the //! lower-level, platform-specific code, providing a common abstraction //! for things like key and mouse events, creating windows, and launching //! an application. Below [`druid-shell`] is [`piet`], which is a cross-platform //! 2D graphics library, providing a simple and familiar drawing API that can be //! implemented for various platforms. //! //! Druid is a data-driven, declarative framework. You describe your application //! model in terms of the [`Data`] trait, and then you build up a tree of //! [`widget`] s that can display and modify your data. //! //! Your widgets handle [`Event`]s, such as mouse movement, and can modify the data; //! these changes are then delivered to relevant widgets, which can update //! their state and redraw. //! //! As your application grows, you can use [`Lens`]es to expose only certain //! subsets of your data model to certains subsets of your widget tree. //! //! # Examples //! //! For many more examples, see [`druid/examples`]. //! //! ```no_run //! use druid::widget::{Align, Flex, Label, TextBox}; //! use druid::{AppLauncher, Data, Env, Lens, LocalizedString, Widget, WindowDesc, WidgetExt}; //! //! const VERTICAL_WIDGET_SPACING: f64 = 20.0; //! const TEXT_BOX_WIDTH: f64 = 200.0; //! const WINDOW_TITLE: LocalizedString<HelloState> = LocalizedString::new("Hello World!"); //! //! #[derive(Clone, Data, Lens)] //! struct HelloState { //! name: String, //! } //! //! fn main() { //! // describe the main window //! let main_window = WindowDesc::new(build_root_widget) //! .title(WINDOW_TITLE) //! .window_size((400.0, 400.0)); //! //! // create the initial app state //! let initial_state = HelloState { //! name: "World".into(), //! }; //! //! // start the application //! AppLauncher::with_window(main_window) //! .launch(initial_state) //! .expect("Failed to launch application"); //! } //! //! fn build_root_widget() -> impl Widget<HelloState> { //! // a label that will determine its text based on the current app data. //! let label = Label::new(|data: &HelloState, _env: &Env| format!("Hello {}!", data.name)); //! // a textbox that modifies `name`. //! let textbox = TextBox::new() //! .with_placeholder("Who are we greeting?") //! .fix_width(TEXT_BOX_WIDTH) //! .lens(HelloState::name); //! //! // arrange the two widgets vertically, with some padding //! let layout = Flex::column() //! .with_child(label) //! .with_spacer(VERTICAL_WIDGET_SPACING) //! .with_child(textbox); //! //! // center the two widgets in the available space //! Align::centered(layout) //! } //! ``` //! //! [`Widget`]: trait.Widget.html //! [`Data`]: trait.Data.html //! [`Lens`]: trait.Lens.html //! [`widget`]: ./widget/index.html //! [`Event`]: enum.Event.html //! [`druid-shell`]: https://docs.rs/druid-shell //! [`piet`]: https://docs.rs/piet //! [`druid/examples`]: https://github.com/xi-editor/druid/tree/v0.5.0/druid/examples #![deny(intra_doc_link_resolution_failure, unsafe_code)] #![allow(clippy::new_ret_no_self, clippy::needless_doctest_main)] #![cfg_attr(docsrs, feature(doc_cfg))] // Allows to use macros from druid_derive in this crate extern crate self as druid; pub use druid_derive::Lens; use druid_shell as shell; #[doc(inline)] pub use druid_shell::{kurbo, piet}; mod app; mod app_delegate; mod bloom; mod box_constraints; mod command; mod contexts; mod core; mod data; mod env; mod event; mod ext_event; pub mod lens; mod localization; mod menu; mod mouse; #[cfg(test)] mod tests; mod text; pub mod theme; pub mod widget; mod win_handler; mod window; // Types from kurbo & piet that are required by public API. pub use kurbo::{Affine, Insets, Point, Rect, Size, Vec2}; pub use piet::{Color, LinearGradient, RadialGradient, RenderContext, UnitPoint}; // these are the types from shell that we expose; others we only use internally. pub use shell::{ Application, Clipboard, ClipboardFormat, Cursor, Error as PlatformError, FileDialogOptions, FileInfo, FileSpec, FormatId, HotKey, KeyCode, KeyEvent, KeyModifiers, MouseButton, RawMods, SysMods, Text, TimerToken, WindowHandle, }; pub use crate::core::WidgetPod; pub use app::{AppLauncher, WindowDesc}; pub use app_delegate::{AppDelegate, DelegateCtx}; pub use box_constraints::BoxConstraints; pub use command::{sys as commands, Command, Selector, Target}; pub use contexts::{EventCtx, LayoutCtx, LifeCycleCtx, PaintCtx, Region, UpdateCtx}; pub use data::Data; pub use env::{Env, Key, KeyOrValue, Value, ValueType}; pub use event::{Event, LifeCycle, WheelEvent}; pub use ext_event::{ExtEventError, ExtEventSink}; pub use lens::{Lens, LensExt, LensWrap}; pub use localization::LocalizedString; pub use menu::{sys as platform_menus, ContextMenu, MenuDesc, MenuItem}; pub use mouse::MouseEvent; pub use widget::{Widget, WidgetExt, WidgetId}; pub use win_handler::DruidHandler; pub use window::{Window, WindowId}; #[cfg(test)] pub(crate) use event::{StateCell, StateCheckFn};