diff options
Diffstat (limited to 'graphics/src/widget')
28 files changed, 2692 insertions, 0 deletions
diff --git a/graphics/src/widget/button.rs b/graphics/src/widget/button.rs new file mode 100644 index 00000000..aeb862d5 --- /dev/null +++ b/graphics/src/widget/button.rs @@ -0,0 +1,113 @@ +//! Allow your users to perform actions by pressing a button. +//! +//! A [`Button`] has some local [`State`]. +//! +//! [`Button`]: type.Button.html +//! [`State`]: struct.State.html +use crate::defaults::{self, Defaults}; +use crate::{Backend, Primitive, Renderer}; +use iced_native::mouse; +use iced_native::{ + Background, Color, Element, Layout, Point, Rectangle, Vector, +}; + +pub use iced_native::button::State; +pub use iced_style::button::{Style, StyleSheet}; + +/// A widget that produces a message when clicked. +/// +/// This is an alias of an `iced_native` button with an `iced_wgpu::Renderer`. +pub type Button<'a, Message, Backend> = + iced_native::Button<'a, Message, Renderer<Backend>>; + +impl<B> iced_native::button::Renderer for Renderer<B> +where + B: Backend, +{ + const DEFAULT_PADDING: u16 = 5; + + type Style = Box<dyn StyleSheet>; + + fn draw<Message>( + &mut self, + _defaults: &Defaults, + bounds: Rectangle, + cursor_position: Point, + is_disabled: bool, + is_pressed: bool, + style: &Box<dyn StyleSheet>, + content: &Element<'_, Message, Self>, + content_layout: Layout<'_>, + ) -> Self::Output { + let is_mouse_over = bounds.contains(cursor_position); + + let styling = if is_disabled { + style.disabled() + } else if is_mouse_over { + if is_pressed { + style.pressed() + } else { + style.hovered() + } + } else { + style.active() + }; + + let (content, _) = content.draw( + self, + &Defaults { + text: defaults::Text { + color: styling.text_color, + }, + }, + content_layout, + cursor_position, + ); + + ( + if styling.background.is_some() || styling.border_width > 0 { + let background = Primitive::Quad { + bounds, + background: styling + .background + .unwrap_or(Background::Color(Color::TRANSPARENT)), + border_radius: styling.border_radius, + border_width: styling.border_width, + border_color: styling.border_color, + }; + + if styling.shadow_offset == Vector::default() { + Primitive::Group { + primitives: vec![background, content], + } + } else { + // TODO: Implement proper shadow support + let shadow = Primitive::Quad { + bounds: Rectangle { + x: bounds.x + styling.shadow_offset.x, + y: bounds.y + styling.shadow_offset.y, + ..bounds + }, + background: Background::Color( + [0.0, 0.0, 0.0, 0.5].into(), + ), + border_radius: styling.border_radius, + border_width: 0, + border_color: Color::TRANSPARENT, + }; + + Primitive::Group { + primitives: vec![shadow, background, content], + } + } + } else { + content + }, + if is_mouse_over { + mouse::Interaction::Pointer + } else { + mouse::Interaction::default() + }, + ) + } +} diff --git a/graphics/src/widget/canvas.rs b/graphics/src/widget/canvas.rs new file mode 100644 index 00000000..d393a5c5 --- /dev/null +++ b/graphics/src/widget/canvas.rs @@ -0,0 +1,236 @@ +//! Draw 2D graphics for your users. +//! +//! A [`Canvas`] widget can be used to draw different kinds of 2D shapes in a +//! [`Frame`]. It can be used for animation, data visualization, game graphics, +//! and more! +//! +//! [`Canvas`]: struct.Canvas.html +//! [`Frame`]: struct.Frame.html +use crate::{Backend, Defaults, Primitive, Renderer}; +use iced_native::{ + layout, mouse, Clipboard, Element, Hasher, Layout, Length, Point, Size, + Vector, Widget, +}; +use std::hash::Hash; +use std::marker::PhantomData; + +pub mod path; + +mod cache; +mod cursor; +mod event; +mod fill; +mod frame; +mod geometry; +mod program; +mod stroke; +mod text; + +pub use cache::Cache; +pub use cursor::Cursor; +pub use event::Event; +pub use fill::Fill; +pub use frame::Frame; +pub use geometry::Geometry; +pub use path::Path; +pub use program::Program; +pub use stroke::{LineCap, LineJoin, Stroke}; +pub use text::Text; + +/// A widget capable of drawing 2D graphics. +/// +/// [`Canvas`]: struct.Canvas.html +/// +/// # Examples +/// The repository has a couple of [examples] showcasing how to use a +/// [`Canvas`]: +/// +/// - [`clock`], an application that uses the [`Canvas`] widget to draw a clock +/// and its hands to display the current time. +/// - [`game_of_life`], an interactive version of the Game of Life, invented by +/// John Conway. +/// - [`solar_system`], an animated solar system drawn using the [`Canvas`] widget +/// and showcasing how to compose different transforms. +/// +/// [examples]: https://github.com/hecrj/iced/tree/master/examples +/// [`clock`]: https://github.com/hecrj/iced/tree/master/examples/clock +/// [`game_of_life`]: https://github.com/hecrj/iced/tree/master/examples/game_of_life +/// [`solar_system`]: https://github.com/hecrj/iced/tree/master/examples/solar_system +/// +/// ## Drawing a simple circle +/// If you want to get a quick overview, here's how we can draw a simple circle: +/// +/// ```no_run +/// # mod iced { +/// # pub use iced_graphics::canvas; +/// # pub use iced_native::{Color, Rectangle}; +/// # } +/// use iced::canvas::{self, Canvas, Cursor, Fill, Frame, Geometry, Path, Program}; +/// use iced::{Color, Rectangle}; +/// +/// // First, we define the data we need for drawing +/// #[derive(Debug)] +/// struct Circle { +/// radius: f32, +/// } +/// +/// // Then, we implement the `Program` trait +/// impl Program<()> for Circle { +/// fn draw(&self, bounds: Rectangle, _cursor: Cursor) -> Vec<Geometry>{ +/// // We prepare a new `Frame` +/// let mut frame = Frame::new(bounds.size()); +/// +/// // We create a `Path` representing a simple circle +/// let circle = Path::circle(frame.center(), self.radius); +/// +/// // And fill it with some color +/// frame.fill(&circle, Fill::Color(Color::BLACK)); +/// +/// // Finally, we produce the geometry +/// vec![frame.into_geometry()] +/// } +/// } +/// +/// // Finally, we simply use our `Circle` to create the `Canvas`! +/// let canvas = Canvas::new(Circle { radius: 50.0 }); +/// ``` +#[derive(Debug)] +pub struct Canvas<Message, P: Program<Message>> { + width: Length, + height: Length, + program: P, + phantom: PhantomData<Message>, +} + +impl<Message, P: Program<Message>> Canvas<Message, P> { + const DEFAULT_SIZE: u16 = 100; + + /// Creates a new [`Canvas`]. + /// + /// [`Canvas`]: struct.Canvas.html + pub fn new(program: P) -> Self { + Canvas { + width: Length::Units(Self::DEFAULT_SIZE), + height: Length::Units(Self::DEFAULT_SIZE), + program, + phantom: PhantomData, + } + } + + /// Sets the width of the [`Canvas`]. + /// + /// [`Canvas`]: struct.Canvas.html + pub fn width(mut self, width: Length) -> Self { + self.width = width; + self + } + + /// Sets the height of the [`Canvas`]. + /// + /// [`Canvas`]: struct.Canvas.html + pub fn height(mut self, height: Length) -> Self { + self.height = height; + self + } +} + +impl<Message, P, B> Widget<Message, Renderer<B>> for Canvas<Message, P> +where + P: Program<Message>, + B: Backend, +{ + fn width(&self) -> Length { + self.width + } + + fn height(&self) -> Length { + self.height + } + + fn layout( + &self, + _renderer: &Renderer<B>, + limits: &layout::Limits, + ) -> layout::Node { + let limits = limits.width(self.width).height(self.height); + let size = limits.resolve(Size::ZERO); + + layout::Node::new(size) + } + + fn on_event( + &mut self, + event: iced_native::Event, + layout: Layout<'_>, + cursor_position: Point, + messages: &mut Vec<Message>, + _renderer: &Renderer<B>, + _clipboard: Option<&dyn Clipboard>, + ) { + let bounds = layout.bounds(); + + let canvas_event = match event { + iced_native::Event::Mouse(mouse_event) => { + Some(Event::Mouse(mouse_event)) + } + _ => None, + }; + + let cursor = Cursor::from_window_position(cursor_position); + + if let Some(canvas_event) = canvas_event { + if let Some(message) = + self.program.update(canvas_event, bounds, cursor) + { + messages.push(message); + } + } + } + + fn draw( + &self, + _renderer: &mut Renderer<B>, + _defaults: &Defaults, + layout: Layout<'_>, + cursor_position: Point, + ) -> (Primitive, mouse::Interaction) { + let bounds = layout.bounds(); + let translation = Vector::new(bounds.x, bounds.y); + let cursor = Cursor::from_window_position(cursor_position); + + ( + Primitive::Translate { + translation, + content: Box::new(Primitive::Group { + primitives: self + .program + .draw(bounds, cursor) + .into_iter() + .map(Geometry::into_primitive) + .collect(), + }), + }, + self.program.mouse_interaction(bounds, cursor), + ) + } + + fn hash_layout(&self, state: &mut Hasher) { + struct Marker; + std::any::TypeId::of::<Marker>().hash(state); + + self.width.hash(state); + self.height.hash(state); + } +} + +impl<'a, Message, P, B> From<Canvas<Message, P>> + for Element<'a, Message, Renderer<B>> +where + Message: 'static, + P: Program<Message> + 'a, + B: Backend, +{ + fn from(canvas: Canvas<Message, P>) -> Element<'a, Message, Renderer<B>> { + Element::new(canvas) + } +} diff --git a/graphics/src/widget/canvas/cache.rs b/graphics/src/widget/canvas/cache.rs new file mode 100644 index 00000000..4b28d164 --- /dev/null +++ b/graphics/src/widget/canvas/cache.rs @@ -0,0 +1,108 @@ +use crate::{ + canvas::{Frame, Geometry}, + Primitive, +}; + +use iced_native::Size; +use std::{cell::RefCell, sync::Arc}; + +enum State { + Empty, + Filled { + bounds: Size, + primitive: Arc<Primitive>, + }, +} + +impl Default for State { + fn default() -> Self { + State::Empty + } +} +/// A simple cache that stores generated [`Geometry`] to avoid recomputation. +/// +/// A [`Cache`] will not redraw its geometry unless the dimensions of its layer +/// change or it is explicitly cleared. +/// +/// [`Layer`]: ../trait.Layer.html +/// [`Cache`]: struct.Cache.html +/// [`Geometry`]: struct.Geometry.html +#[derive(Debug, Default)] +pub struct Cache { + state: RefCell<State>, +} + +impl Cache { + /// Creates a new empty [`Cache`]. + /// + /// [`Cache`]: struct.Cache.html + pub fn new() -> Self { + Cache { + state: Default::default(), + } + } + + /// Clears the [`Cache`], forcing a redraw the next time it is used. + /// + /// [`Cache`]: struct.Cache.html + pub fn clear(&mut self) { + *self.state.borrow_mut() = State::Empty; + } + + /// Draws [`Geometry`] using the provided closure and stores it in the + /// [`Cache`]. + /// + /// The closure will only be called when + /// - the bounds have changed since the previous draw call. + /// - the [`Cache`] is empty or has been explicitly cleared. + /// + /// Otherwise, the previously stored [`Geometry`] will be returned. The + /// [`Cache`] is not cleared in this case. In other words, it will keep + /// returning the stored [`Geometry`] if needed. + /// + /// [`Cache`]: struct.Cache.html + pub fn draw(&self, bounds: Size, draw_fn: impl Fn(&mut Frame)) -> Geometry { + use std::ops::Deref; + + if let State::Filled { + bounds: cached_bounds, + primitive, + } = self.state.borrow().deref() + { + if *cached_bounds == bounds { + return Geometry::from_primitive(Primitive::Cached { + cache: primitive.clone(), + }); + } + } + + let mut frame = Frame::new(bounds); + draw_fn(&mut frame); + + let primitive = { + let geometry = frame.into_geometry(); + + Arc::new(geometry.into_primitive()) + }; + + *self.state.borrow_mut() = State::Filled { + bounds, + primitive: primitive.clone(), + }; + + Geometry::from_primitive(Primitive::Cached { cache: primitive }) + } +} + +impl std::fmt::Debug for State { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + match self { + State::Empty => write!(f, "Empty"), + State::Filled { primitive, bounds } => f + .debug_struct("Filled") + .field("primitive", primitive) + .field("bounds", bounds) + .finish(), + } + } +} diff --git a/graphics/src/widget/canvas/cursor.rs b/graphics/src/widget/canvas/cursor.rs new file mode 100644 index 00000000..456760ea --- /dev/null +++ b/graphics/src/widget/canvas/cursor.rs @@ -0,0 +1,72 @@ +use iced_native::{Point, Rectangle}; + +/// The mouse cursor state. +#[derive(Debug, Clone, Copy, PartialEq)] +pub enum Cursor { + /// The cursor has a defined position. + Available(Point), + + /// The cursor is currently unavailable (i.e. out of bounds or busy). + Unavailable, +} + +impl Cursor { + // TODO: Remove this once this type is used in `iced_native` to encode + // proper cursor availability + pub(crate) fn from_window_position(position: Point) -> Self { + if position.x < 0.0 || position.y < 0.0 { + Cursor::Unavailable + } else { + Cursor::Available(position) + } + } + + /// Returns the absolute position of the [`Cursor`], if available. + /// + /// [`Cursor`]: enum.Cursor.html + pub fn position(&self) -> Option<Point> { + match self { + Cursor::Available(position) => Some(*position), + Cursor::Unavailable => None, + } + } + + /// Returns the relative position of the [`Cursor`] inside the given bounds, + /// if available. + /// + /// If the [`Cursor`] is not over the provided bounds, this method will + /// return `None`. + /// + /// [`Cursor`]: enum.Cursor.html + pub fn position_in(&self, bounds: &Rectangle) -> Option<Point> { + if self.is_over(bounds) { + self.position_from(bounds.position()) + } else { + None + } + } + + /// Returns the relative position of the [`Cursor`] from the given origin, + /// if available. + /// + /// [`Cursor`]: enum.Cursor.html + pub fn position_from(&self, origin: Point) -> Option<Point> { + match self { + Cursor::Available(position) => { + Some(Point::new(position.x - origin.x, position.y - origin.y)) + } + Cursor::Unavailable => None, + } + } + + /// Returns whether the [`Cursor`] is currently over the provided bounds + /// or not. + /// + /// [`Cursor`]: enum.Cursor.html + pub fn is_over(&self, bounds: &Rectangle) -> bool { + match self { + Cursor::Available(position) => bounds.contains(*position), + Cursor::Unavailable => false, + } + } +} diff --git a/graphics/src/widget/canvas/event.rs b/graphics/src/widget/canvas/event.rs new file mode 100644 index 00000000..ad11f51e --- /dev/null +++ b/graphics/src/widget/canvas/event.rs @@ -0,0 +1,10 @@ +use iced_native::mouse; + +/// A [`Canvas`] event. +/// +/// [`Canvas`]: struct.Event.html +#[derive(Debug, Clone, Copy, PartialEq)] +pub enum Event { + /// A mouse event. + Mouse(mouse::Event), +} diff --git a/graphics/src/widget/canvas/fill.rs b/graphics/src/widget/canvas/fill.rs new file mode 100644 index 00000000..a2010e45 --- /dev/null +++ b/graphics/src/widget/canvas/fill.rs @@ -0,0 +1,20 @@ +use iced_native::Color; + +/// The style used to fill geometry. +#[derive(Debug, Clone, Copy)] +pub enum Fill { + /// Fill with a color. + Color(Color), +} + +impl Default for Fill { + fn default() -> Fill { + Fill::Color(Color::BLACK) + } +} + +impl From<Color> for Fill { + fn from(color: Color) -> Fill { + Fill::Color(color) + } +} diff --git a/graphics/src/widget/canvas/frame.rs b/graphics/src/widget/canvas/frame.rs new file mode 100644 index 00000000..48d28d95 --- /dev/null +++ b/graphics/src/widget/canvas/frame.rs @@ -0,0 +1,367 @@ +use iced_native::{Point, Rectangle, Size, Vector}; + +use crate::{ + canvas::{Fill, Geometry, Path, Stroke, Text}, + triangle, Primitive, +}; + +/// The frame of a [`Canvas`]. +/// +/// [`Canvas`]: struct.Canvas.html +#[derive(Debug)] +pub struct Frame { + size: Size, + buffers: lyon::tessellation::VertexBuffers<triangle::Vertex2D, u32>, + primitives: Vec<Primitive>, + transforms: Transforms, +} + +#[derive(Debug)] +struct Transforms { + previous: Vec<Transform>, + current: Transform, +} + +#[derive(Debug, Clone, Copy)] +struct Transform { + raw: lyon::math::Transform, + is_identity: bool, +} + +impl Frame { + /// Creates a new empty [`Frame`] with the given dimensions. + /// + /// The default coordinate system of a [`Frame`] has its origin at the + /// top-left corner of its bounds. + /// + /// [`Frame`]: struct.Frame.html + pub fn new(size: Size) -> Frame { + Frame { + size, + buffers: lyon::tessellation::VertexBuffers::new(), + primitives: Vec::new(), + transforms: Transforms { + previous: Vec::new(), + current: Transform { + raw: lyon::math::Transform::identity(), + is_identity: true, + }, + }, + } + } + + /// Returns the width of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn width(&self) -> f32 { + self.size.width + } + + /// Returns the width of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn height(&self) -> f32 { + self.size.height + } + + /// Returns the dimensions of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn size(&self) -> Size { + self.size + } + + /// Returns the coordinate of the center of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn center(&self) -> Point { + Point::new(self.size.width / 2.0, self.size.height / 2.0) + } + + /// Draws the given [`Path`] on the [`Frame`] by filling it with the + /// provided style. + /// + /// [`Path`]: path/struct.Path.html + /// [`Frame`]: struct.Frame.html + pub fn fill(&mut self, path: &Path, fill: impl Into<Fill>) { + use lyon::tessellation::{ + BuffersBuilder, FillOptions, FillTessellator, + }; + + let mut buffers = BuffersBuilder::new( + &mut self.buffers, + FillVertex(match fill.into() { + Fill::Color(color) => color.into_linear(), + }), + ); + + let mut tessellator = FillTessellator::new(); + + let result = if self.transforms.current.is_identity { + tessellator.tessellate_path( + path.raw(), + &FillOptions::default(), + &mut buffers, + ) + } else { + let path = path.transformed(&self.transforms.current.raw); + + tessellator.tessellate_path( + path.raw(), + &FillOptions::default(), + &mut buffers, + ) + }; + + let _ = result.expect("Tessellate path"); + } + + /// Draws an axis-aligned rectangle given its top-left corner coordinate and + /// its `Size` on the [`Frame`] by filling it with the provided style. + /// + /// [`Frame`]: struct.Frame.html + pub fn fill_rectangle( + &mut self, + top_left: Point, + size: Size, + fill: impl Into<Fill>, + ) { + use lyon::tessellation::{BuffersBuilder, FillOptions}; + + let mut buffers = BuffersBuilder::new( + &mut self.buffers, + FillVertex(match fill.into() { + Fill::Color(color) => color.into_linear(), + }), + ); + + let top_left = + self.transforms.current.raw.transform_point( + lyon::math::Point::new(top_left.x, top_left.y), + ); + + let size = + self.transforms.current.raw.transform_vector( + lyon::math::Vector::new(size.width, size.height), + ); + + let _ = lyon::tessellation::basic_shapes::fill_rectangle( + &lyon::math::Rect::new(top_left, size.into()), + &FillOptions::default(), + &mut buffers, + ) + .expect("Fill rectangle"); + } + + /// Draws the stroke of the given [`Path`] on the [`Frame`] with the + /// provided style. + /// + /// [`Path`]: path/struct.Path.html + /// [`Frame`]: struct.Frame.html + pub fn stroke(&mut self, path: &Path, stroke: impl Into<Stroke>) { + use lyon::tessellation::{ + BuffersBuilder, StrokeOptions, StrokeTessellator, + }; + + let stroke = stroke.into(); + + let mut buffers = BuffersBuilder::new( + &mut self.buffers, + StrokeVertex(stroke.color.into_linear()), + ); + + let mut tessellator = StrokeTessellator::new(); + + let mut options = StrokeOptions::default(); + options.line_width = stroke.width; + options.start_cap = stroke.line_cap.into(); + options.end_cap = stroke.line_cap.into(); + options.line_join = stroke.line_join.into(); + + let result = if self.transforms.current.is_identity { + tessellator.tessellate_path(path.raw(), &options, &mut buffers) + } else { + let path = path.transformed(&self.transforms.current.raw); + + tessellator.tessellate_path(path.raw(), &options, &mut buffers) + }; + + let _ = result.expect("Stroke path"); + } + + /// Draws the characters of the given [`Text`] on the [`Frame`], filling + /// them with the given color. + /// + /// __Warning:__ Text currently does not work well with rotations and scale + /// transforms! The position will be correctly transformed, but the + /// resulting glyphs will not be rotated or scaled properly. + /// + /// Additionally, all text will be rendered on top of all the layers of + /// a [`Canvas`]. Therefore, it is currently only meant to be used for + /// overlays, which is the most common use case. + /// + /// Support for vectorial text is planned, and should address all these + /// limitations. + /// + /// [`Text`]: struct.Text.html + /// [`Frame`]: struct.Frame.html + /// [`Canvas`]: struct.Canvas.html + pub fn fill_text(&mut self, text: impl Into<Text>) { + use std::f32; + + let text = text.into(); + + let position = if self.transforms.current.is_identity { + text.position + } else { + let transformed = self.transforms.current.raw.transform_point( + lyon::math::Point::new(text.position.x, text.position.y), + ); + + Point::new(transformed.x, transformed.y) + }; + + // TODO: Use vectorial text instead of primitive + self.primitives.push(Primitive::Text { + content: text.content, + bounds: Rectangle { + x: position.x, + y: position.y, + width: f32::INFINITY, + height: f32::INFINITY, + }, + color: text.color, + size: text.size, + font: text.font, + horizontal_alignment: text.horizontal_alignment, + vertical_alignment: text.vertical_alignment, + }); + } + + /// Stores the current transform of the [`Frame`] and executes the given + /// drawing operations, restoring the transform afterwards. + /// + /// This method is useful to compose transforms and perform drawing + /// operations in different coordinate systems. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn with_save(&mut self, f: impl FnOnce(&mut Frame)) { + self.transforms.previous.push(self.transforms.current); + + f(self); + + self.transforms.current = self.transforms.previous.pop().unwrap(); + } + + /// Applies a translation to the current transform of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn translate(&mut self, translation: Vector) { + self.transforms.current.raw = self + .transforms + .current + .raw + .pre_translate(lyon::math::Vector::new( + translation.x, + translation.y, + )); + self.transforms.current.is_identity = false; + } + + /// Applies a rotation to the current transform of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn rotate(&mut self, angle: f32) { + self.transforms.current.raw = self + .transforms + .current + .raw + .pre_rotate(lyon::math::Angle::radians(-angle)); + self.transforms.current.is_identity = false; + } + + /// Applies a scaling to the current transform of the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + #[inline] + pub fn scale(&mut self, scale: f32) { + self.transforms.current.raw = + self.transforms.current.raw.pre_scale(scale, scale); + self.transforms.current.is_identity = false; + } + + /// Produces the [`Geometry`] representing everything drawn on the [`Frame`]. + /// + /// [`Frame`]: struct.Frame.html + /// [`Geometry`]: struct.Geometry.html + pub fn into_geometry(mut self) -> Geometry { + if !self.buffers.indices.is_empty() { + self.primitives.push(Primitive::Mesh2D { + buffers: triangle::Mesh2D { + vertices: self.buffers.vertices, + indices: self.buffers.indices, + }, + size: self.size, + }); + } + + Geometry::from_primitive(Primitive::Group { + primitives: self.primitives, + }) + } +} + +struct FillVertex([f32; 4]); + +impl lyon::tessellation::BasicVertexConstructor<triangle::Vertex2D> + for FillVertex +{ + fn new_vertex( + &mut self, + position: lyon::math::Point, + ) -> triangle::Vertex2D { + triangle::Vertex2D { + position: [position.x, position.y], + color: self.0, + } + } +} + +impl lyon::tessellation::FillVertexConstructor<triangle::Vertex2D> + for FillVertex +{ + fn new_vertex( + &mut self, + position: lyon::math::Point, + _attributes: lyon::tessellation::FillAttributes<'_>, + ) -> triangle::Vertex2D { + triangle::Vertex2D { + position: [position.x, position.y], + color: self.0, + } + } +} + +struct StrokeVertex([f32; 4]); + +impl lyon::tessellation::StrokeVertexConstructor<triangle::Vertex2D> + for StrokeVertex +{ + fn new_vertex( + &mut self, + position: lyon::math::Point, + _attributes: lyon::tessellation::StrokeAttributes<'_, '_>, + ) -> triangle::Vertex2D { + triangle::Vertex2D { + position: [position.x, position.y], + color: self.0, + } + } +} diff --git a/graphics/src/widget/canvas/geometry.rs b/graphics/src/widget/canvas/geometry.rs new file mode 100644 index 00000000..4cadee39 --- /dev/null +++ b/graphics/src/widget/canvas/geometry.rs @@ -0,0 +1,34 @@ +use crate::Primitive; + +/// A bunch of shapes that can be drawn. +/// +/// [`Geometry`] can be easily generated with a [`Frame`] or stored in a +/// [`Cache`]. +/// +/// [`Geometry`]: struct.Geometry.html +/// [`Frame`]: struct.Frame.html +/// [`Cache`]: struct.Cache.html +#[derive(Debug, Clone)] +pub struct Geometry(Primitive); + +impl Geometry { + pub(crate) fn from_primitive(primitive: Primitive) -> Self { + Self(primitive) + } + + /// Turns the [`Geometry`] into a [`Primitive`]. + /// + /// This can be useful if you are building a custom widget. + /// + /// [`Geometry`]: struct.Geometry.html + /// [`Primitive`]: ../enum.Primitive.html + pub fn into_primitive(self) -> Primitive { + self.0 + } +} + +impl From<Geometry> for Primitive { + fn from(geometry: Geometry) -> Primitive { + geometry.0 + } +} diff --git a/graphics/src/widget/canvas/path.rs b/graphics/src/widget/canvas/path.rs new file mode 100644 index 00000000..c26bf187 --- /dev/null +++ b/graphics/src/widget/canvas/path.rs @@ -0,0 +1,79 @@ +//! Build different kinds of 2D shapes. +pub mod arc; + +mod builder; + +#[doc(no_inline)] +pub use arc::Arc; +pub use builder::Builder; + +use iced_native::{Point, Size}; + +/// An immutable set of points that may or may not be connected. +/// +/// A single [`Path`] can represent different kinds of 2D shapes! +/// +/// [`Path`]: struct.Path.html +#[derive(Debug, Clone)] +pub struct Path { + raw: lyon::path::Path, +} + +impl Path { + /// Creates a new [`Path`] with the provided closure. + /// + /// Use the [`Builder`] to configure your [`Path`]. + /// + /// [`Path`]: struct.Path.html + /// [`Builder`]: struct.Builder.html + pub fn new(f: impl FnOnce(&mut Builder)) -> Self { + let mut builder = Builder::new(); + + // TODO: Make it pure instead of side-effect-based (?) + f(&mut builder); + + builder.build() + } + + /// Creates a new [`Path`] representing a line segment given its starting + /// and end points. + /// + /// [`Path`]: struct.Path.html + pub fn line(from: Point, to: Point) -> Self { + Self::new(|p| { + p.move_to(from); + p.line_to(to); + }) + } + + /// Creates a new [`Path`] representing a rectangle given its top-left + /// corner coordinate and its `Size`. + /// + /// [`Path`]: struct.Path.html + pub fn rectangle(top_left: Point, size: Size) -> Self { + Self::new(|p| p.rectangle(top_left, size)) + } + + /// Creates a new [`Path`] representing a circle given its center + /// coordinate and its radius. + /// + /// [`Path`]: struct.Path.html + pub fn circle(center: Point, radius: f32) -> Self { + Self::new(|p| p.circle(center, radius)) + } + + #[inline] + pub(crate) fn raw(&self) -> &lyon::path::Path { + &self.raw + } + + #[inline] + pub(crate) fn transformed( + &self, + transform: &lyon::math::Transform, + ) -> Path { + Path { + raw: self.raw.transformed(transform), + } + } +} diff --git a/graphics/src/widget/canvas/path/arc.rs b/graphics/src/widget/canvas/path/arc.rs new file mode 100644 index 00000000..343191f1 --- /dev/null +++ b/graphics/src/widget/canvas/path/arc.rs @@ -0,0 +1,44 @@ +//! Build and draw curves. +use iced_native::{Point, Vector}; + +/// A segment of a differentiable curve. +#[derive(Debug, Clone, Copy)] +pub struct Arc { + /// The center of the arc. + pub center: Point, + /// The radius of the arc. + pub radius: f32, + /// The start of the segment's angle, clockwise rotation. + pub start_angle: f32, + /// The end of the segment's angle, clockwise rotation. + pub end_angle: f32, +} + +/// An elliptical [`Arc`]. +/// +/// [`Arc`]: struct.Arc.html +#[derive(Debug, Clone, Copy)] +pub struct Elliptical { + /// The center of the arc. + pub center: Point, + /// The radii of the arc's ellipse, defining its axes. + pub radii: Vector, + /// The rotation of the arc's ellipse. + pub rotation: f32, + /// The start of the segment's angle, clockwise rotation. + pub start_angle: f32, + /// The end of the segment's angle, clockwise rotation. + pub end_angle: f32, +} + +impl From<Arc> for Elliptical { + fn from(arc: Arc) -> Elliptical { + Elliptical { + center: arc.center, + radii: Vector::new(arc.radius, arc.radius), + rotation: 0.0, + start_angle: arc.start_angle, + end_angle: arc.end_angle, + } + } +} diff --git a/graphics/src/widget/canvas/path/builder.rs b/graphics/src/widget/canvas/path/builder.rs new file mode 100644 index 00000000..6511fa52 --- /dev/null +++ b/graphics/src/widget/canvas/path/builder.rs @@ -0,0 +1,180 @@ +use crate::canvas::path::{arc, Arc, Path}; + +use iced_native::{Point, Size}; +use lyon::path::builder::{Build, FlatPathBuilder, PathBuilder, SvgBuilder}; + +/// A [`Path`] builder. +/// +/// Once a [`Path`] is built, it can no longer be mutated. +/// +/// [`Path`]: struct.Path.html +#[allow(missing_debug_implementations)] +pub struct Builder { + raw: lyon::path::builder::SvgPathBuilder<lyon::path::Builder>, +} + +impl Builder { + /// Creates a new [`Builder`]. + /// + /// [`Builder`]: struct.Builder.html + pub fn new() -> Builder { + Builder { + raw: lyon::path::Path::builder().with_svg(), + } + } + + /// Moves the starting point of a new sub-path to the given `Point`. + #[inline] + pub fn move_to(&mut self, point: Point) { + let _ = self.raw.move_to(lyon::math::Point::new(point.x, point.y)); + } + + /// Connects the last point in the [`Path`] to the given `Point` with a + /// straight line. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn line_to(&mut self, point: Point) { + let _ = self.raw.line_to(lyon::math::Point::new(point.x, point.y)); + } + + /// Adds an [`Arc`] to the [`Path`] from `start_angle` to `end_angle` in + /// a clockwise direction. + /// + /// [`Arc`]: struct.Arc.html + /// [`Path`]: struct.Path.html + #[inline] + pub fn arc(&mut self, arc: Arc) { + self.ellipse(arc.into()); + } + + /// Adds a circular arc to the [`Path`] with the given control points and + /// radius. + /// + /// The arc is connected to the previous point by a straight line, if + /// necessary. + /// + /// [`Path`]: struct.Path.html + pub fn arc_to(&mut self, a: Point, b: Point, radius: f32) { + use lyon::{math, path}; + + let a = math::Point::new(a.x, a.y); + + if self.raw.current_position() != a { + let _ = self.raw.line_to(a); + } + + let _ = self.raw.arc_to( + math::Vector::new(radius, radius), + math::Angle::radians(0.0), + path::ArcFlags::default(), + math::Point::new(b.x, b.y), + ); + } + + /// Adds an [`Ellipse`] to the [`Path`] using a clockwise direction. + /// + /// [`Ellipse`]: struct.Arc.html + /// [`Path`]: struct.Path.html + pub fn ellipse(&mut self, arc: arc::Elliptical) { + use lyon::{geom, math}; + + let arc = geom::Arc { + center: math::Point::new(arc.center.x, arc.center.y), + radii: math::Vector::new(arc.radii.x, arc.radii.y), + x_rotation: math::Angle::radians(arc.rotation), + start_angle: math::Angle::radians(arc.start_angle), + sweep_angle: math::Angle::radians(arc.end_angle), + }; + + let _ = self.raw.move_to(arc.sample(0.0)); + + arc.for_each_quadratic_bezier(&mut |curve| { + let _ = self.raw.quadratic_bezier_to(curve.ctrl, curve.to); + }); + } + + /// Adds a cubic Bézier curve to the [`Path`] given its two control points + /// and its end point. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn bezier_curve_to( + &mut self, + control_a: Point, + control_b: Point, + to: Point, + ) { + use lyon::math; + + let _ = self.raw.cubic_bezier_to( + math::Point::new(control_a.x, control_a.y), + math::Point::new(control_b.x, control_b.y), + math::Point::new(to.x, to.y), + ); + } + + /// Adds a quadratic Bézier curve to the [`Path`] given its control point + /// and its end point. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn quadratic_curve_to(&mut self, control: Point, to: Point) { + use lyon::math; + + let _ = self.raw.quadratic_bezier_to( + math::Point::new(control.x, control.y), + math::Point::new(to.x, to.y), + ); + } + + /// Adds a rectangle to the [`Path`] given its top-left corner coordinate + /// and its `Size`. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn rectangle(&mut self, top_left: Point, size: Size) { + self.move_to(top_left); + self.line_to(Point::new(top_left.x + size.width, top_left.y)); + self.line_to(Point::new( + top_left.x + size.width, + top_left.y + size.height, + )); + self.line_to(Point::new(top_left.x, top_left.y + size.height)); + self.close(); + } + + /// Adds a circle to the [`Path`] given its center coordinate and its + /// radius. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn circle(&mut self, center: Point, radius: f32) { + self.arc(Arc { + center, + radius, + start_angle: 0.0, + end_angle: 2.0 * std::f32::consts::PI, + }); + } + + /// Closes the current sub-path in the [`Path`] with a straight line to + /// the starting point. + /// + /// [`Path`]: struct.Path.html + #[inline] + pub fn close(&mut self) { + self.raw.close() + } + + /// Builds the [`Path`] of this [`Builder`]. + /// + /// [`Path`]: struct.Path.html + /// [`Builder`]: struct.Builder.html + #[inline] + pub fn build(self) -> Path { + Path { + raw: self.raw.build(), + } + } +} diff --git a/graphics/src/widget/canvas/program.rs b/graphics/src/widget/canvas/program.rs new file mode 100644 index 00000000..725d9d72 --- /dev/null +++ b/graphics/src/widget/canvas/program.rs @@ -0,0 +1,85 @@ +use crate::canvas::{Cursor, Event, Geometry}; +use iced_native::{mouse, Rectangle}; + +/// The state and logic of a [`Canvas`]. +/// +/// A [`Program`] can mutate internal state and produce messages for an +/// application. +/// +/// [`Canvas`]: struct.Canvas.html +/// [`Program`]: trait.Program.html +pub trait Program<Message> { + /// Updates the state of the [`Program`]. + /// + /// When a [`Program`] is used in a [`Canvas`], the runtime will call this + /// method for each [`Event`]. + /// + /// This method can optionally return a `Message` to notify an application + /// of any meaningful interactions. + /// + /// By default, this method does and returns nothing. + /// + /// [`Program`]: trait.Program.html + /// [`Canvas`]: struct.Canvas.html + /// [`Event`]: enum.Event.html + fn update( + &mut self, + _event: Event, + _bounds: Rectangle, + _cursor: Cursor, + ) -> Option<Message> { + None + } + + /// Draws the state of the [`Program`], producing a bunch of [`Geometry`]. + /// + /// [`Geometry`] can be easily generated with a [`Frame`] or stored in a + /// [`Cache`]. + /// + /// [`Program`]: trait.Program.html + /// [`Geometry`]: struct.Geometry.html + /// [`Frame`]: struct.Frame.html + /// [`Cache`]: struct.Cache.html + fn draw(&self, bounds: Rectangle, cursor: Cursor) -> Vec<Geometry>; + + /// Returns the current mouse interaction of the [`Program`]. + /// + /// The interaction returned will be in effect even if the cursor position + /// is out of bounds of the program's [`Canvas`]. + /// + /// [`Program`]: trait.Program.html + /// [`Canvas`]: struct.Canvas.html + fn mouse_interaction( + &self, + _bounds: Rectangle, + _cursor: Cursor, + ) -> mouse::Interaction { + mouse::Interaction::default() + } +} + +impl<T, Message> Program<Message> for &mut T +where + T: Program<Message>, +{ + fn update( + &mut self, + event: Event, + bounds: Rectangle, + cursor: Cursor, + ) -> Option<Message> { + T::update(self, event, bounds, cursor) + } + + fn draw(&self, bounds: Rectangle, cursor: Cursor) -> Vec<Geometry> { + T::draw(self, bounds, cursor) + } + + fn mouse_interaction( + &self, + bounds: Rectangle, + cursor: Cursor, + ) -> mouse::Interaction { + T::mouse_interaction(self, bounds, cursor) + } +} diff --git a/graphics/src/widget/canvas/stroke.rs b/graphics/src/widget/canvas/stroke.rs new file mode 100644 index 00000000..5b6fc56a --- /dev/null +++ b/graphics/src/widget/canvas/stroke.rs @@ -0,0 +1,115 @@ +use iced_native::Color; + +/// The style of a stroke. +#[derive(Debug, Clone, Copy)] +pub struct Stroke { + /// The color of the stroke. + pub color: Color, + /// The distance between the two edges of the stroke. + pub width: f32, + /// The shape to be used at the end of open subpaths when they are stroked. + pub line_cap: LineCap, + /// The shape to be used at the corners of paths or basic shapes when they + /// are stroked. + pub line_join: LineJoin, +} + +impl Stroke { + /// Sets the color of the [`Stroke`]. + /// + /// [`Stroke`]: struct.Stroke.html + pub fn with_color(self, color: Color) -> Stroke { + Stroke { color, ..self } + } + + /// Sets the width of the [`Stroke`]. + /// + /// [`Stroke`]: struct.Stroke.html + pub fn with_width(self, width: f32) -> Stroke { + Stroke { width, ..self } + } + + /// Sets the [`LineCap`] of the [`Stroke`]. + /// + /// [`LineCap`]: enum.LineCap.html + /// [`Stroke`]: struct.Stroke.html + pub fn with_line_cap(self, line_cap: LineCap) -> Stroke { + Stroke { line_cap, ..self } + } + + /// Sets the [`LineJoin`] of the [`Stroke`]. + /// + /// [`LineJoin`]: enum.LineJoin.html + /// [`Stroke`]: struct.Stroke.html + pub fn with_line_join(self, line_join: LineJoin) -> Stroke { + Stroke { line_join, ..self } + } +} + +impl Default for Stroke { + fn default() -> Stroke { + Stroke { + color: Color::BLACK, + width: 1.0, + line_cap: LineCap::default(), + line_join: LineJoin::default(), + } + } +} + +/// The shape used at the end of open subpaths when they are stroked. +#[derive(Debug, Clone, Copy)] +pub enum LineCap { + /// The stroke for each sub-path does not extend beyond its two endpoints. + Butt, + /// At the end of each sub-path, the shape representing the stroke will be + /// extended by a square. + Square, + /// At the end of each sub-path, the shape representing the stroke will be + /// extended by a semicircle. + Round, +} + +impl Default for LineCap { + fn default() -> LineCap { + LineCap::Butt + } +} + +impl From<LineCap> for lyon::tessellation::LineCap { + fn from(line_cap: LineCap) -> lyon::tessellation::LineCap { + match line_cap { + LineCap::Butt => lyon::tessellation::LineCap::Butt, + LineCap::Square => lyon::tessellation::LineCap::Square, + LineCap::Round => lyon::tessellation::LineCap::Round, + } + } +} + +/// The shape used at the corners of paths or basic shapes when they are +/// stroked. +#[derive(Debug, Clone, Copy)] +pub enum LineJoin { + /// A sharp corner. + Miter, + /// A round corner. + Round, + /// A bevelled corner. + Bevel, +} + +impl Default for LineJoin { + fn default() -> LineJoin { + LineJoin::Miter + } +} + +impl From<LineJoin> for lyon::tessellation::LineJoin { + fn from(line_join: LineJoin) -> lyon::tessellation::LineJoin { + match line_join { + LineJoin::Miter => lyon::tessellation::LineJoin::Miter, + LineJoin::Round => lyon::tessellation::LineJoin::Round, + LineJoin::Bevel => lyon::tessellation::LineJoin::Bevel, + } + } +} diff --git a/graphics/src/widget/canvas/text.rs b/graphics/src/widget/canvas/text.rs new file mode 100644 index 00000000..c4cae30e --- /dev/null +++ b/graphics/src/widget/canvas/text.rs @@ -0,0 +1,49 @@ +use iced_native::{Color, Font, HorizontalAlignment, Point, VerticalAlignment}; + +/// A bunch of text that can be drawn to a canvas +#[derive(Debug, Clone)] +pub struct Text { + /// The contents of the text + pub content: String, + /// The position where to begin drawing the text (top-left corner coordinates) + pub position: Point, + /// The color of the text + pub color: Color, + /// The size of the text + pub size: f32, + /// The font of the text + pub font: Font, + /// The horizontal alignment of the text + pub horizontal_alignment: HorizontalAlignment, + /// The vertical alignment of the text + pub vertical_alignment: VerticalAlignment, +} + +impl Default for Text { + fn default() -> Text { + Text { + content: String::new(), + position: Point::ORIGIN, + color: Color::BLACK, + size: 16.0, + font: Font::Default, + horizontal_alignment: HorizontalAlignment::Left, + vertical_alignment: VerticalAlignment::Top, + } + } +} + +impl From<String> for Text { + fn from(content: String) -> Text { + Text { + content, + ..Default::default() + } + } +} + +impl From<&str> for Text { + fn from(content: &str) -> Text { + String::from(content).into() + } +} diff --git a/graphics/src/widget/checkbox.rs b/graphics/src/widget/checkbox.rs new file mode 100644 index 00000000..cb7fd2cf --- /dev/null +++ b/graphics/src/widget/checkbox.rs @@ -0,0 +1,76 @@ +//! Show toggle controls using checkboxes. +use crate::backend::{self, Backend}; +use crate::{Primitive, Renderer}; +use iced_native::checkbox; +use iced_native::mouse; +use iced_native::{HorizontalAlignment, Rectangle, VerticalAlignment}; + +pub use iced_style::checkbox::{Style, StyleSheet}; + +/// A box that can be checked. +/// +/// This is an alias of an `iced_native` checkbox with an `iced_wgpu::Renderer`. +pub type Checkbox<Message, Backend> = + iced_native::Checkbox<Message, Renderer<Backend>>; + +impl<B> checkbox::Renderer for Renderer<B> +where + B: Backend + backend::Text, +{ + type Style = Box<dyn StyleSheet>; + + const DEFAULT_SIZE: u16 = 20; + const DEFAULT_SPACING: u16 = 15; + + fn draw( + &mut self, + bounds: Rectangle, + is_checked: bool, + is_mouse_over: bool, + (label, _): Self::Output, + style_sheet: &Self::Style, + ) -> Self::Output { + let style = if is_mouse_over { + style_sheet.hovered(is_checked) + } else { + style_sheet.active(is_checked) + }; + + let checkbox = Primitive::Quad { + bounds, + background: style.background, + border_radius: style.border_radius, + border_width: style.border_width, + border_color: style.border_color, + }; + + ( + Primitive::Group { + primitives: if is_checked { + let check = Primitive::Text { + content: B::CHECKMARK_ICON.to_string(), + font: B::ICON_FONT, + size: bounds.height * 0.7, + bounds: Rectangle { + x: bounds.center_x(), + y: bounds.center_y(), + ..bounds + }, + color: style.checkmark_color, + horizontal_alignment: HorizontalAlignment::Center, + vertical_alignment: VerticalAlignment::Center, + }; + + vec![checkbox, check, label] + } else { + vec![checkbox, label] + }, + }, + if is_mouse_over { + mouse::Interaction::Pointer + } else { + mouse::Interaction::default() + }, + ) + } +} diff --git a/graphics/src/widget/column.rs b/graphics/src/widget/column.rs new file mode 100644 index 00000000..6c7235c7 --- /dev/null +++ b/graphics/src/widget/column.rs @@ -0,0 +1,43 @@ +use crate::{Backend, Primitive, Renderer}; +use iced_native::column; +use iced_native::mouse; +use iced_native::{Element, Layout, Point}; + +/// A container that distributes its contents vertically. +pub type Column<'a, Message, Backend> = + iced_native::Column<'a, Message, Renderer<Backend>>; + +impl<B> column::Renderer for Renderer<B> +where + B: Backend, +{ + fn draw<Message>( + &mut self, + defaults: &Self::Defaults, + content: &[Element<'_, Message, Self>], + layout: Layout<'_>, + cursor_position: Point, + ) -> Self::Output { + let mut mouse_interaction = mouse::Interaction::default(); + + ( + Primitive::Group { + primitives: content + .iter() + .zip(layout.children()) + .map(|(child, layout)| { + let (primitive, new_mouse_interaction) = + child.draw(self, defaults, layout, cursor_position); + + if new_mouse_interaction > mouse_interaction { + mouse_interaction = new_mouse_interaction; + } + + primitive + }) + .collect(), + }, + mouse_interaction, + ) + } +} diff --git a/graphics/src/widget/container.rs b/graphics/src/widget/container.rs new file mode 100644 index 00000000..070cb48b --- /dev/null +++ b/graphics/src/widget/container.rs @@ -0,0 +1,63 @@ +//! Decorate content and apply alignment. +use crate::container; +use crate::defaults::{self, Defaults}; +use crate::{Backend, Primitive, Renderer}; +use iced_native::{Background, Color, Element, Layout, Point, Rectangle}; + +pub use iced_style::container::{Style, StyleSheet}; + +/// An element decorating some content. +/// +/// This is an alias of an `iced_native` container with a default +/// `Renderer`. +pub type Container<'a, Message, Backend> = + iced_native::Container<'a, Message, Renderer<Backend>>; + +impl<B> iced_native::container::Renderer for Renderer<B> +where + B: Backend, +{ + type Style = Box<dyn container::StyleSheet>; + + fn draw<Message>( + &mut self, + defaults: &Defaults, + bounds: Rectangle, + cursor_position: Point, + style_sheet: &Self::Style, + content: &Element<'_, Message, Self>, + content_layout: Layout<'_>, + ) -> Self::Output { + let style = style_sheet.style(); + + let defaults = Defaults { + text: defaults::Text { + color: style.text_color.unwrap_or(defaults.text.color), + }, + }; + + let (content, mouse_interaction) = + content.draw(self, &defaults, content_layout, cursor_position); + + if style.background.is_some() || style.border_width > 0 { + let quad = Primitive::Quad { + bounds, + background: style + .background + .unwrap_or(Background::Color(Color::TRANSPARENT)), + border_radius: style.border_radius, + border_width: style.border_width, + border_color: style.border_color, + }; + + ( + Primitive::Group { + primitives: vec![quad, content], + }, + mouse_interaction, + ) + } else { + (content, mouse_interaction) + } + } +} diff --git a/graphics/src/widget/image.rs b/graphics/src/widget/image.rs new file mode 100644 index 00000000..30f446e8 --- /dev/null +++ b/graphics/src/widget/image.rs @@ -0,0 +1,31 @@ +//! Display images in your user interface. +use crate::backend::{self, Backend}; +use crate::{Primitive, Renderer}; +use iced_native::image; +use iced_native::mouse; +use iced_native::Layout; + +pub use iced_native::image::{Handle, Image}; + +impl<B> image::Renderer for Renderer<B> +where + B: Backend + backend::Image, +{ + fn dimensions(&self, handle: &image::Handle) -> (u32, u32) { + self.backend().dimensions(handle) + } + + fn draw( + &mut self, + handle: image::Handle, + layout: Layout<'_>, + ) -> Self::Output { + ( + Primitive::Image { + handle, + bounds: layout.bounds(), + }, + mouse::Interaction::default(), + ) + } +} diff --git a/graphics/src/widget/pane_grid.rs b/graphics/src/widget/pane_grid.rs new file mode 100644 index 00000000..56af683d --- /dev/null +++ b/graphics/src/widget/pane_grid.rs @@ -0,0 +1,118 @@ +//! Let your users split regions of your application and organize layout dynamically. +//! +//! [](https://gfycat.com/mixedflatjellyfish) +//! +//! # Example +//! The [`pane_grid` example] showcases how to use a [`PaneGrid`] with resizing, +//! drag and drop, and hotkey support. +//! +//! [`pane_grid` example]: https://github.com/hecrj/iced/tree/0.1/examples/pane_grid +//! [`PaneGrid`]: type.PaneGrid.html +use crate::{Backend, Primitive, Renderer}; +use iced_native::mouse; +use iced_native::pane_grid; +use iced_native::{Element, Layout, Point, Rectangle, Vector}; + +pub use iced_native::pane_grid::{ + Axis, Direction, DragEvent, Focus, KeyPressEvent, Pane, ResizeEvent, Split, + State, +}; + +/// A collection of panes distributed using either vertical or horizontal splits +/// to completely fill the space available. +/// +/// [](https://gfycat.com/mixedflatjellyfish) +/// +/// This is an alias of an `iced_native` pane grid with an `iced_wgpu::Renderer`. +pub type PaneGrid<'a, Message, Backend> = + iced_native::PaneGrid<'a, Message, Renderer<Backend>>; + +impl<B> pane_grid::Renderer for Renderer<B> +where + B: Backend, +{ + fn draw<Message>( + &mut self, + defaults: &Self::Defaults, + content: &[(Pane, Element<'_, Message, Self>)], + dragging: Option<Pane>, + resizing: Option<Axis>, + layout: Layout<'_>, + cursor_position: Point, + ) -> Self::Output { + let pane_cursor_position = if dragging.is_some() { + // TODO: Remove once cursor availability is encoded in the type + // system + Point::new(-1.0, -1.0) + } else { + cursor_position + }; + + let mut mouse_interaction = mouse::Interaction::default(); + let mut dragged_pane = None; + + let mut panes: Vec<_> = content + .iter() + .zip(layout.children()) + .enumerate() + .map(|(i, ((id, pane), layout))| { + let (primitive, new_mouse_interaction) = + pane.draw(self, defaults, layout, pane_cursor_position); + + if new_mouse_interaction > mouse_interaction { + mouse_interaction = new_mouse_interaction; + } + + if Some(*id) == dragging { + dragged_pane = Some((i, layout)); + } + + primitive + }) + .collect(); + + let primitives = if let Some((index, layout)) = dragged_pane { + let pane = panes.remove(index); + let bounds = layout.bounds(); + + // TODO: Fix once proper layering is implemented. + // This is a pretty hacky way to achieve layering. + let clip = Primitive::Clip { + bounds: Rectangle { + x: cursor_position.x - bounds.width / 2.0, + y: cursor_position.y - bounds.height / 2.0, + width: bounds.width + 0.5, + height: bounds.height + 0.5, + }, + offset: Vector::new(0, 0), + content: Box::new(Primitive::Translate { + translation: Vector::new( + cursor_position.x - bounds.x - bounds.width / 2.0, + cursor_position.y - bounds.y - bounds.height / 2.0, + ), + content: Box::new(pane), + }), + }; + + panes.push(clip); + + panes + } else { + panes + }; + + ( + Primitive::Group { primitives }, + if dragging.is_some() { + mouse::Interaction::Grabbing + } else if let Some(axis) = resizing { + match axis { + Axis::Horizontal => mouse::Interaction::ResizingVertically, + Axis::Vertical => mouse::Interaction::ResizingHorizontally, + } + } else { + mouse_interaction + }, + ) + } +} diff --git a/graphics/src/widget/progress_bar.rs b/graphics/src/widget/progress_bar.rs new file mode 100644 index 00000000..48acb3c1 --- /dev/null +++ b/graphics/src/widget/progress_bar.rs @@ -0,0 +1,73 @@ +//! Allow your users to visually track the progress of a computation. +//! +//! A [`ProgressBar`] has a range of possible values and a current value, +//! as well as a length, height and style. +//! +//! [`ProgressBar`]: type.ProgressBar.html +use crate::{Backend, Primitive, Renderer}; +use iced_native::mouse; +use iced_native::progress_bar; +use iced_native::{Color, Rectangle}; + +pub use iced_style::progress_bar::{Style, StyleSheet}; + +/// A bar that displays progress. +/// +/// This is an alias of an `iced_native` progress bar with an +/// `iced_wgpu::Renderer`. +pub type ProgressBar<Backend> = iced_native::ProgressBar<Renderer<Backend>>; + +impl<B> progress_bar::Renderer for Renderer<B> +where + B: Backend, +{ + type Style = Box<dyn StyleSheet>; + + const DEFAULT_HEIGHT: u16 = 30; + + fn draw( + &self, + bounds: Rectangle, + range: std::ops::RangeInclusive<f32>, + value: f32, + style_sheet: &Self::Style, + ) -> Self::Output { + let style = style_sheet.style(); + + let (range_start, range_end) = range.into_inner(); + let active_progress_width = bounds.width + * ((value - range_start) / (range_end - range_start).max(1.0)); + + let background = Primitive::Group { + primitives: vec![Primitive::Quad { + bounds: Rectangle { ..bounds }, + background: style.background, + border_radius: style.border_radius, + border_width: 0, + border_color: Color::TRANSPARENT, + }], + }; + + ( + if active_progress_width > 0.0 { + let bar = Primitive::Quad { + bounds: Rectangle { + width: active_progress_width, + ..bounds + }, + background: style.bar, + border_radius: style.border_radius, + border_width: 0, + border_color: Color::TRANSPARENT, + }; + + Primitive::Group { + primitives: vec![background, bar], + } + } else { + background + }, + mouse::Interaction::default(), + ) + } +} diff --git a/graphics/src/widget/radio.rs b/graphics/src/widget/radio.rs new file mode 100644 index 00000000..dd8b5f17 --- /dev/null +++ b/graphics/src/widget/radio.rs @@ -0,0 +1,78 @@ +//! Create choices using radio buttons. +use crate::{Backend, Primitive, Renderer}; +use iced_native::mouse; +use iced_native::radio; +use iced_native::{Background, Color, Rectangle}; + +pub use iced_style::radio::{Style, StyleSheet}; + +/// A circular button representing a choice. +/// +/// This is an alias of an `iced_native` radio button with an +/// `iced_wgpu::Renderer`. +pub type Radio<Message, Backend> = + iced_native::Radio<Message, Renderer<Backend>>; + +const SIZE: f32 = 28.0; +const DOT_SIZE: f32 = SIZE / 2.0; + +impl<B> radio::Renderer for Renderer<B> +where + B: Backend, +{ + type Style = Box<dyn StyleSheet>; + + const DEFAULT_SIZE: u16 = SIZE as u16; + const DEFAULT_SPACING: u16 = 15; + + fn draw( + &mut self, + bounds: Rectangle, + is_selected: bool, + is_mouse_over: bool, + (label, _): Self::Output, + style_sheet: &Self::Style, + ) -> Self::Output { + let style = if is_mouse_over { + style_sheet.hovered() + } else { + style_sheet.active() + }; + + let radio = Primitive::Quad { + bounds, + background: style.background, + border_radius: (SIZE / 2.0) as u16, + border_width: style.border_width, + border_color: style.border_color, + }; + + ( + Primitive::Group { + primitives: if is_selected { + let radio_circle = Primitive::Quad { + bounds: Rectangle { + x: bounds.x + DOT_SIZE / 2.0, + y: bounds.y + DOT_SIZE / 2.0, + width: bounds.width - DOT_SIZE, + height: bounds.height - DOT_SIZE, + }, + background: Background::Color(style.dot_color), + border_radius: (DOT_SIZE / 2.0) as u16, + border_width: 0, + border_color: Color::TRANSPARENT, + }; + + vec![radio, radio_circle, label] + } else { + vec![radio, label] + }, + }, + if is_mouse_over { + mouse::Interaction::Pointer + } else { + mouse::Interaction::default() + }, + ) + } +} diff --git a/graphics/src/widget/row.rs b/graphics/src/widget/row.rs new file mode 100644 index 00000000..4c1dbadc --- /dev/null +++ b/graphics/src/widget/row.rs @@ -0,0 +1,43 @@ +use crate::{Backend, Primitive, Renderer}; +use iced_native::mouse; +use iced_native::row; +use iced_native::{Element, Layout, Point}; + +/// A container that distributes its contents horizontally. +pub type Row<'a, Message, Backend> = + iced_native::Row<'a, Message, Renderer<Backend>>; + +impl<B> row::Renderer for Renderer<B> +where + B: Backend, +{ + fn draw<Message>( + &mut self, + defaults: &Self::Defaults, + content: &[Element<'_, Message, Self>], + layout: Layout<'_>, + cursor_position: Point, + ) -> Self::Output { + let mut mouse_interaction = mouse::Interaction::default(); + + ( + Primitive::Group { + primitives: content + .iter() + .zip(layout.children()) + .map(|(child, layout)| { + let (primitive, new_mouse_interaction) = + child.draw(self, defaults, layout, cursor_position); + + if new_mouse_interaction > mouse_interaction { + mouse_interaction = new_mouse_interaction; + } + + primitive + }) + .collect(), + }, + mouse_interaction, + ) + } +} diff --git a/graphics/src/widget/scrollable.rs b/graphics/src/widget/scrollable.rs new file mode 100644 index 00000000..b149db0a --- /dev/null +++ b/graphics/src/widget/scrollable.rs @@ -0,0 +1,142 @@ +//! Navigate an endless amount of content with a scrollbar. +use crate::{Backend, Primitive, Renderer}; +use iced_native::mouse; +use iced_native::scrollable; +use iced_native::{Background, Color, Rectangle, Vector}; + +pub use iced_native::scrollable::State; +pub use iced_style::scrollable::{Scrollbar, Scroller, StyleSheet}; + +/// A widget that can vertically display an infinite amount of content +/// with a scrollbar. +/// +/// This is an alias of an `iced_native` scrollable with a default +/// `Renderer`. +pub type Scrollable<'a, Message, Backend> = + iced_native::Scrollable<'a, Message, Renderer<Backend>>; + +const SCROLLBAR_WIDTH: u16 = 10; +const SCROLLBAR_MARGIN: u16 = 2; + +impl<B> scrollable::Renderer for Renderer<B> +where + B: Backend, +{ + type Style = Box<dyn iced_style::scrollable::StyleSheet>; + + fn scrollbar( + &self, + bounds: Rectangle, + content_bounds: Rectangle, + offset: u32, + ) -> Option<scrollable::Scrollbar> { + if content_bounds.height > bounds.height { + let scrollbar_bounds = Rectangle { + x: bounds.x + bounds.width + - f32::from(SCROLLBAR_WIDTH + 2 * SCROLLBAR_MARGIN), + y: bounds.y, + width: f32::from(SCROLLBAR_WIDTH + 2 * SCROLLBAR_MARGIN), + height: bounds.height, + }; + + let ratio = bounds.height / content_bounds.height; + let scrollbar_height = bounds.height * ratio; + let y_offset = offset as f32 * ratio; + + let scroller_bounds = Rectangle { + x: scrollbar_bounds.x + f32::from(SCROLLBAR_MARGIN), + y: scrollbar_bounds.y + y_offset, + width: scrollbar_bounds.width - f32::from(2 * SCROLLBAR_MARGIN), + height: scrollbar_height, + }; + + Some(scrollable::Scrollbar { + bounds: scrollbar_bounds, + scroller: scrollable::Scroller { + bounds: scroller_bounds, + }, + }) + } else { + None + } + } + + fn draw( + &mut self, + state: &scrollable::State, + bounds: Rectangle, + _content_bounds: Rectangle, + is_mouse_over: bool, + is_mouse_over_scrollbar: bool, + scrollbar: Option<scrollable::Scrollbar>, + offset: u32, + style_sheet: &Self::Style, + (content, mouse_interaction): Self::Output, + ) -> Self::Output { + ( + if let Some(scrollbar) = scrollbar { + let clip = Primitive::Clip { + bounds, + offset: Vector::new(0, offset), + content: Box::new(content), + }; + + let style = if state.is_scroller_grabbed() { + style_sheet.dragging() + } else if is_mouse_over_scrollbar { + style_sheet.hovered() + } else { + style_sheet.active() + }; + + let is_scrollbar_visible = + style.background.is_some() || style.border_width > 0; + + let scroller = if is_mouse_over + || state.is_scroller_grabbed() + || is_scrollbar_visible + { + Primitive::Quad { + bounds: scrollbar.scroller.bounds, + background: Background::Color(style.scroller.color), + border_radius: style.scroller.border_radius, + border_width: style.scroller.border_width, + border_color: style.scroller.border_color, + } + } else { + Primitive::None + }; + + let scrollbar = if is_scrollbar_visible { + Primitive::Quad { + bounds: Rectangle { + x: scrollbar.bounds.x + f32::from(SCROLLBAR_MARGIN), + width: scrollbar.bounds.width + - f32::from(2 * SCROLLBAR_MARGIN), + ..scrollbar.bounds + }, + background: style + .background + .unwrap_or(Background::Color(Color::TRANSPARENT)), + border_radius: style.border_radius, + border_width: style.border_width, + border_color: style.border_color, + } + } else { + Primitive::None + }; + + Primitive::Group { + primitives: vec![clip, scrollbar, scroller], + } + } else { + content + }, + if is_mouse_over_scrollbar || state.is_scroller_grabbed() { + mouse::Interaction::Idle + } else { + mouse_interaction + }, + ) + } +} diff --git a/graphics/src/widget/slider.rs b/graphics/src/widget/slider.rs new file mode 100644 index 00000000..b00cde9a --- /dev/null +++ b/graphics/src/widget/slider.rs @@ -0,0 +1,124 @@ +//! Display an interactive selector of a single value from a range of values. +//! +//! A [`Slider`] has some local [`State`]. +//! +//! [`Slider`]: struct.Slider.html +//! [`State`]: struct.State.html +use crate::{Backend, Primitive, Renderer}; +use iced_native::mouse; +use iced_native::slider; +use iced_native::{Background, Color, Point, Rectangle}; + +pub use iced_native::slider::State; +pub use iced_style::slider::{Handle, HandleShape, Style, StyleSheet}; + +/// An horizontal bar and a handle that selects a single value from a range of +/// values. +/// +/// This is an alias of an `iced_native` slider with an `iced_wgpu::Renderer`. +pub type Slider<'a, Message, Backend> = + iced_native::Slider<'a, Message, Renderer<Backend>>; + +const HANDLE_HEIGHT: f32 = 22.0; + +impl<B> slider::Renderer for Renderer<B> +where + B: Backend, +{ + type Style = Box<dyn StyleSheet>; + + fn height(&self) -> u32 { + 30 + } + + fn draw( + &mut self, + bounds: Rectangle, + cursor_position: Point, + range: std::ops::RangeInclusive<f32>, + value: f32, + is_dragging: bool, + style_sheet: &Self::Style, + ) -> Self::Output { + let is_mouse_over = bounds.contains(cursor_position); + + let style = if is_dragging { + style_sheet.dragging() + } else if is_mouse_over { + style_sheet.hovered() + } else { + style_sheet.active() + }; + + let rail_y = bounds.y + (bounds.height / 2.0).round(); + + let (rail_top, rail_bottom) = ( + Primitive::Quad { + bounds: Rectangle { + x: bounds.x, + y: rail_y, + width: bounds.width, + height: 2.0, + }, + background: Background::Color(style.rail_colors.0), + border_radius: 0, + border_width: 0, + border_color: Color::TRANSPARENT, + }, + Primitive::Quad { + bounds: Rectangle { + x: bounds.x, + y: rail_y + 2.0, + width: bounds.width, + height: 2.0, + }, + background: Background::Color(style.rail_colors.1), + border_radius: 0, + border_width: 0, + border_color: Color::TRANSPARENT, + }, + ); + + let (range_start, range_end) = range.into_inner(); + + let (handle_width, handle_height, handle_border_radius) = + match style.handle.shape { + HandleShape::Circle { radius } => { + (f32::from(radius * 2), f32::from(radius * 2), radius) + } + HandleShape::Rectangle { + width, + border_radius, + } => (f32::from(width), HANDLE_HEIGHT, border_radius), + }; + + let handle_offset = (bounds.width - handle_width) + * ((value - range_start) / (range_end - range_start).max(1.0)); + + let handle = Primitive::Quad { + bounds: Rectangle { + x: bounds.x + handle_offset.round(), + y: rail_y - handle_height / 2.0, + width: handle_width, + height: handle_height, + }, + background: Background::Color(style.handle.color), + border_radius: handle_border_radius, + border_width: style.handle.border_width, + border_color: style.handle.border_color, + }; + + ( + Primitive::Group { + primitives: vec![rail_top, rail_bottom, handle], + }, + if is_dragging { + mouse::Interaction::Grabbing + } else if is_mouse_over { + mouse::Interaction::Grab + } else { + mouse::Interaction::default() + }, + ) + } +} diff --git a/graphics/src/widget/space.rs b/graphics/src/widget/space.rs new file mode 100644 index 00000000..1f31eabe --- /dev/null +++ b/graphics/src/widget/space.rs @@ -0,0 +1,15 @@ +use crate::{Backend, Primitive, Renderer}; +use iced_native::mouse; +use iced_native::space; +use iced_native::Rectangle; + +pub use iced_native::Space; + +impl<B> space::Renderer for Renderer<B> +where + B: Backend, +{ + fn draw(&mut self, _bounds: Rectangle) -> Self::Output { + (Primitive::None, mouse::Interaction::default()) + } +} diff --git a/graphics/src/widget/svg.rs b/graphics/src/widget/svg.rs new file mode 100644 index 00000000..8b5ed66a --- /dev/null +++ b/graphics/src/widget/svg.rs @@ -0,0 +1,29 @@ +//! Display vector graphics in your application. +use crate::backend::{self, Backend}; +use crate::{Primitive, Renderer}; +use iced_native::{mouse, svg, Layout}; + +pub use iced_native::svg::{Handle, Svg}; + +impl<B> svg::Renderer for Renderer<B> +where + B: Backend + backend::Svg, +{ + fn dimensions(&self, handle: &svg::Handle) -> (u32, u32) { + self.backend().viewport_dimensions(handle) + } + + fn draw( + &mut self, + handle: svg::Handle, + layout: Layout<'_>, + ) -> Self::Output { + ( + Primitive::Svg { + handle, + bounds: layout.bounds(), + }, + mouse::Interaction::default(), + ) + } +} diff --git a/graphics/src/widget/text.rs b/graphics/src/widget/text.rs new file mode 100644 index 00000000..327f8e29 --- /dev/null +++ b/graphics/src/widget/text.rs @@ -0,0 +1,72 @@ +//! Write some text for your users to read. +use crate::backend::{self, Backend}; +use crate::{Primitive, Renderer}; +use iced_native::mouse; +use iced_native::text; +use iced_native::{ + Color, Font, HorizontalAlignment, Rectangle, Size, VerticalAlignment, +}; + +/// A paragraph of text. +/// +/// This is an alias of an `iced_native` text with an `iced_wgpu::Renderer`. +pub type Text<Backend> = iced_native::Text<Renderer<Backend>>; + +use std::f32; + +impl<B> text::Renderer for Renderer<B> +where + B: Backend + backend::Text, +{ + type Font = Font; + + const DEFAULT_SIZE: u16 = 20; + + fn measure( + &self, + content: &str, + size: u16, + font: Font, + bounds: Size, + ) -> (f32, f32) { + self.backend() + .measure(content, f32::from(size), font, bounds) + } + + fn draw( + &mut self, + defaults: &Self::Defaults, + bounds: Rectangle, + content: &str, + size: u16, + font: Font, + color: Option<Color>, + horizontal_alignment: HorizontalAlignment, + vertical_alignment: VerticalAlignment, + ) -> Self::Output { + let x = match horizontal_alignment { + iced_native::HorizontalAlignment::Left => bounds.x, + iced_native::HorizontalAlignment::Center => bounds.center_x(), + iced_native::HorizontalAlignment::Right => bounds.x + bounds.width, + }; + + let y = match vertical_alignment { + iced_native::VerticalAlignment::Top => bounds.y, + iced_native::VerticalAlignment::Center => bounds.center_y(), + iced_native::VerticalAlignment::Bottom => bounds.y + bounds.height, + }; + + ( + Primitive::Text { + content: content.to_string(), + size: f32::from(size), + bounds: Rectangle { x, y, ..bounds }, + color: color.unwrap_or(defaults.text.color), + font, + horizontal_alignment, + vertical_alignment, + }, + mouse::Interaction::default(), + ) + } +} diff --git a/graphics/src/widget/text_input.rs b/graphics/src/widget/text_input.rs new file mode 100644 index 00000000..893197d1 --- /dev/null +++ b/graphics/src/widget/text_input.rs @@ -0,0 +1,273 @@ +//! Display fields that can be filled with text. +//! +//! A [`TextInput`] has some local [`State`]. +//! +//! [`TextInput`]: struct.TextInput.html +//! [`State`]: struct.State.html +use crate::backend::{self, Backend}; +use crate::{Primitive, Renderer}; +use iced_native::mouse; +use iced_native::text_input::{self, cursor}; +use iced_native::{ + Background, Color, Font, HorizontalAlignment, Point, Rectangle, Size, + Vector, VerticalAlignment, +}; +use std::f32; + +pub use iced_native::text_input::State; +pub use iced_style::text_input::{Style, StyleSheet}; + +/// A field that can be filled with text. +/// +/// This is an alias of an `iced_native` text input with an `iced_wgpu::Renderer`. +pub type TextInput<'a, Message, Backend> = + iced_native::TextInput<'a, Message, Renderer<Backend>>; + +impl<B> text_input::Renderer for Renderer<B> +where + B: Backend + backend::Text, +{ + type Style = Box<dyn StyleSheet>; + + fn default_size(&self) -> u16 { + // TODO: Make this configurable + 20 + } + + fn measure_value(&self, value: &str, size: u16, font: Font) -> f32 { + let backend = self.backend(); + + let (width, _) = + backend.measure(value, f32::from(size), font, Size::INFINITY); + + width + } + + fn offset( + &self, + text_bounds: Rectangle, + font: Font, + size: u16, + value: &text_input::Value, + state: &text_input::State, + ) -> f32 { + if state.is_focused() { + let cursor = state.cursor(); + + let focus_position = match cursor.state(value) { + cursor::State::Index(i) => i, + cursor::State::Selection { end, .. } => end, + }; + + let (_, offset) = measure_cursor_and_scroll_offset( + self, + text_bounds, + value, + size, + focus_position, + font, + ); + + offset + } else { + 0.0 + } + } + + fn draw( + &mut self, + bounds: Rectangle, + text_bounds: Rectangle, + cursor_position: Point, + font: Font, + size: u16, + placeholder: &str, + value: &text_input::Value, + state: &text_input::State, + style_sheet: &Self::Style, + ) -> Self::Output { + let is_mouse_over = bounds.contains(cursor_position); + + let style = if state.is_focused() { + style_sheet.focused() + } else if is_mouse_over { + style_sheet.hovered() + } else { + style_sheet.active() + }; + + let input = Primitive::Quad { + bounds, + background: style.background, + border_radius: style.border_radius, + border_width: style.border_width, + border_color: style.border_color, + }; + + let text = value.to_string(); + + let text_value = Primitive::Text { + content: if text.is_empty() { + placeholder.to_string() + } else { + text.clone() + }, + color: if text.is_empty() { + style_sheet.placeholder_color() + } else { + style_sheet.value_color() + }, + font, + bounds: Rectangle { + y: text_bounds.center_y(), + width: f32::INFINITY, + ..text_bounds + }, + size: f32::from(size), + horizontal_alignment: HorizontalAlignment::Left, + vertical_alignment: VerticalAlignment::Center, + }; + + let (contents_primitive, offset) = if state.is_focused() { + let cursor = state.cursor(); + + let (cursor_primitive, offset) = match cursor.state(value) { + cursor::State::Index(position) => { + let (text_value_width, offset) = + measure_cursor_and_scroll_offset( + self, + text_bounds, + value, + size, + position, + font, + ); + + ( + Primitive::Quad { + bounds: Rectangle { + x: text_bounds.x + text_value_width, + y: text_bounds.y, + width: 1.0, + height: text_bounds.height, + }, + background: Background::Color( + style_sheet.value_color(), + ), + border_radius: 0, + border_width: 0, + border_color: Color::TRANSPARENT, + }, + offset, + ) + } + cursor::State::Selection { start, end } => { + let left = start.min(end); + let right = end.max(start); + + let (left_position, left_offset) = + measure_cursor_and_scroll_offset( + self, + text_bounds, + value, + size, + left, + font, + ); + + let (right_position, right_offset) = + measure_cursor_and_scroll_offset( + self, + text_bounds, + value, + size, + right, + font, + ); + + let width = right_position - left_position; + + ( + Primitive::Quad { + bounds: Rectangle { + x: text_bounds.x + left_position, + y: text_bounds.y, + width, + height: text_bounds.height, + }, + background: Background::Color( + style_sheet.selection_color(), + ), + border_radius: 0, + border_width: 0, + border_color: Color::TRANSPARENT, + }, + if end == right { + right_offset + } else { + left_offset + }, + ) + } + }; + + ( + Primitive::Group { + primitives: vec![cursor_primitive, text_value], + }, + Vector::new(offset as u32, 0), + ) + } else { + (text_value, Vector::new(0, 0)) + }; + + let text_width = self.measure_value( + if text.is_empty() { placeholder } else { &text }, + size, + font, + ); + + let contents = if text_width > text_bounds.width { + Primitive::Clip { + bounds: text_bounds, + offset, + content: Box::new(contents_primitive), + } + } else { + contents_primitive + }; + + ( + Primitive::Group { + primitives: vec![input, contents], + }, + if is_mouse_over { + mouse::Interaction::Text + } else { + mouse::Interaction::default() + }, + ) + } +} + +fn measure_cursor_and_scroll_offset<B>( + renderer: &Renderer<B>, + text_bounds: Rectangle, + value: &text_input::Value, + size: u16, + cursor_index: usize, + font: Font, +) -> (f32, f32) +where + B: Backend + backend::Text, +{ + use iced_native::text_input::Renderer; + + let text_before_cursor = value.until(cursor_index).to_string(); + + let text_value_width = + renderer.measure_value(&text_before_cursor, size, font); + let offset = ((text_value_width + 5.0) - text_bounds.width).max(0.0); + + (text_value_width, offset) +} |