diff --git a/style/src/button.rs b/style/src/button.rs index 0d7a668aca..91dc3e6d82 100644 --- a/style/src/button.rs +++ b/style/src/button.rs @@ -36,6 +36,11 @@ pub trait StyleSheet { /// Produces the active [`Appearance`] of a button. fn active(&self, style: &Self::Style) -> Appearance; + /// Produces the focused [`Appearance`] of a button. + fn focused(&self, style: &Self::Style, is_active: bool) -> Appearance { + self.hovered(style) + } + /// Produces the hovered [`Appearance`] of a button. fn hovered(&self, style: &Self::Style) -> Appearance { let active = self.active(style); diff --git a/widget/src/button.rs b/widget/src/button.rs index 867fbfaf59..cb968f60be 100644 --- a/widget/src/button.rs +++ b/widget/src/button.rs @@ -2,17 +2,18 @@ //! //! A [`Button`] has some local [`State`]. use crate::core::event::{self, Event}; -use crate::core::layout; +use crate::core::{keyboard, layout, widget}; use crate::core::mouse; use crate::core::overlay; use crate::core::renderer; use crate::core::touch; use crate::core::widget::tree::{self, Tree}; -use crate::core::widget::Operation; +use crate::core::widget::{Operation, operation}; use crate::core::{ Background, Clipboard, Color, Element, Layout, Length, Padding, Rectangle, Shell, Size, Vector, Widget, }; +use crate::core::keyboard::key; pub use crate::style::button::{Appearance, StyleSheet}; @@ -56,6 +57,7 @@ where Theme: StyleSheet, Renderer: crate::core::Renderer, { + id: Option, content: Element<'a, Message, Theme, Renderer>, on_press: Option, width: Length, @@ -78,6 +80,7 @@ where let size = content.as_widget().size_hint(); Button { + id: None, content, on_press: None, width: size.width.fluid(), @@ -88,6 +91,12 @@ where } } + /// Sets the [`Id`] of the [`Button`]. + pub fn id(mut self, id: Id) -> Self { + self.id = Some(id); + self + } + /// Sets the width of the [`Button`]. pub fn width(mut self, width: impl Into) -> Self { self.width = width.into(); @@ -189,6 +198,9 @@ where renderer: &Renderer, operation: &mut dyn Operation, ) { + let state = tree.state.downcast_mut::(); + operation.focusable(state, self.id.as_ref().map(|id| &id.0)); + operation.container(None, layout.bounds(), &mut |operation| { self.content.as_widget().operate( &mut tree.children[0], @@ -312,7 +324,9 @@ where /// The local state of a [`Button`]. #[derive(Debug, Clone, Copy, PartialEq, Eq, Default)] pub struct State { + is_focused: bool, is_pressed: bool, + is_active: bool, } impl State { @@ -320,8 +334,68 @@ impl State { pub fn new() -> State { State::default() } + + fn is_focused(&self) -> bool { + self.is_focused + } + + fn pressed(&mut self) { + self.is_focused = true; + self.is_pressed = true; + self.is_active = true; + } + + fn focus(&mut self) { + self.is_focused = true; + } + + fn reset(&mut self) { + self.is_pressed = false; + self.is_active = false; + self.is_focused = false; + } +} + +impl operation::Focusable for State { + fn is_focused(&self) -> bool { + State::is_focused(&self) + } + + fn focus(&mut self) { + State::reset(self); + State::focus(self) + } + + fn unfocus(&mut self) { + Self::reset(self) + } } +/// The identifier of a [`Button`]. +#[derive(Debug, Clone, PartialEq, Eq, Hash)] +pub struct Id(widget::Id); + +impl Id { + /// Creates a custom [`Id`]. + pub fn new(id: impl Into>) -> Self { + Self(widget::Id::new(id)) + } + + /// Creates a unique [`Id`]. + /// + /// This function produces a different [`Id`] every time it is called. + pub fn unique() -> Self { + Self(widget::Id::unique()) + } +} + +impl From for widget::Id { + fn from(id: Id) -> Self { + id.0 + } +} + + /// Processes the given [`Event`] and updates the [`State`] of a [`Button`] /// accordingly. pub fn update<'a, Message: Clone>( @@ -338,12 +412,13 @@ pub fn update<'a, Message: Clone>( if on_press.is_some() { let bounds = layout.bounds(); + let state = state(); if cursor.is_over(bounds) { - let state = state(); - - state.is_pressed = true; + state.pressed(); return event::Status::Captured; + } else { + state.reset(); } } } @@ -353,7 +428,7 @@ pub fn update<'a, Message: Clone>( let state = state(); if state.is_pressed { - state.is_pressed = false; + state.reset(); let bounds = layout.bounds(); @@ -368,7 +443,21 @@ pub fn update<'a, Message: Clone>( Event::Touch(touch::Event::FingerLost { .. }) => { let state = state(); - state.is_pressed = false; + state.reset(); + } + Event::Keyboard(keyboard::Event::KeyPressed { key, .. }) => { + match key.as_ref() { + keyboard::Key::Named(key::Named::Enter) => { + let state = state(); + if state.is_focused() { + if let Some(on_press) = on_press.clone() { + shell.publish(on_press); + state.pressed(); + } + } + } + _ => {} + } } _ => {} } @@ -402,7 +491,12 @@ where theme.hovered(style) } } else { - theme.active(style) + let state = state(); + if state.is_focused { + theme.focused(style, state.is_active) + } else { + theme.active(style) + } }; if styling.background.is_some()