24 files changed, 426 insertions, 0 deletions
diff --git a/graphics/src/widget.rs b/graphics/src/widget.rs
new file mode 100644
index 00000000..6a8e814b
--- /dev/null
+++ b/graphics/src/widget.rs
@@ -0,0 +1,49 @@
+//! Use the widgets supported out-of-the-box.
+//!
+//! # Re-exports
+//! For convenience, the contents of this module are available at the root
+//! module. Therefore, you can directly type:
+//!
+//! ```
+//! use iced_graphics::{button, Button};
+//! ```
+pub mod button;
+pub mod checkbox;
+pub mod container;
+pub mod pane_grid;
+pub mod progress_bar;
+pub mod radio;
+pub mod scrollable;
+pub mod slider;
+pub mod text_input;
+
+mod text;
+
+#[doc(no_inline)]
+pub use button::Button;
+#[doc(no_inline)]
+pub use checkbox::Checkbox;
+#[doc(no_inline)]
+pub use container::Container;
+#[doc(no_inline)]
+pub use pane_grid::PaneGrid;
+#[doc(no_inline)]
+pub use progress_bar::ProgressBar;
+#[doc(no_inline)]
+pub use radio::Radio;
+#[doc(no_inline)]
+pub use scrollable::Scrollable;
+#[doc(no_inline)]
+pub use slider::Slider;
+#[doc(no_inline)]
+pub use text_input::TextInput;
+
+pub use text::Text;
+
+#[cfg(feature = "canvas")]
+#[cfg_attr(docsrs, doc(cfg(feature = "canvas")))]
+pub mod canvas;
+
+#[cfg(feature = "canvas")]
+#[doc(no_inline)]
+pub use canvas::Canvas;
diff --git a/graphics/src/widget/button.rs b/graphics/src/widget/button.rs
new file mode 100644
index 00000000..9debf5c3
--- /dev/null
+++ b/graphics/src/widget/button.rs
@@ -0,0 +1,16 @@
+//! 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::Renderer;
+
+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>>;
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/wgpu/src/widget/canvas/cache.rs b/graphics/src/widget/canvas/cache.rs
index 4b28d164..4b28d164 100644
--- a/wgpu/src/widget/canvas/cache.rs
+++ b/graphics/src/widget/canvas/cache.rs
diff --git a/wgpu/src/widget/canvas/cursor.rs b/graphics/src/widget/canvas/cursor.rs
index 456760ea..456760ea 100644
--- a/wgpu/src/widget/canvas/cursor.rs
+++ b/graphics/src/widget/canvas/cursor.rs
diff --git a/wgpu/src/widget/canvas/event.rs b/graphics/src/widget/canvas/event.rs
index ad11f51e..ad11f51e 100644
--- a/wgpu/src/widget/canvas/event.rs
+++ b/graphics/src/widget/canvas/event.rs
diff --git a/wgpu/src/widget/canvas/fill.rs b/graphics/src/widget/canvas/fill.rs
index a2010e45..a2010e45 100644
--- a/wgpu/src/widget/canvas/fill.rs
+++ b/graphics/src/widget/canvas/fill.rs
diff --git a/wgpu/src/widget/canvas/frame.rs b/graphics/src/widget/canvas/frame.rs
index 5262ab4e..5262ab4e 100644
--- a/wgpu/src/widget/canvas/frame.rs
+++ b/graphics/src/widget/canvas/frame.rs
diff --git a/wgpu/src/widget/canvas/geometry.rs b/graphics/src/widget/canvas/geometry.rs
index 4cadee39..4cadee39 100644
--- a/wgpu/src/widget/canvas/geometry.rs
+++ b/graphics/src/widget/canvas/geometry.rs
diff --git a/wgpu/src/widget/canvas/path.rs b/graphics/src/widget/canvas/path.rs
index c26bf187..c26bf187 100644
--- a/wgpu/src/widget/canvas/path.rs
+++ b/graphics/src/widget/canvas/path.rs
diff --git a/wgpu/src/widget/canvas/path/arc.rs b/graphics/src/widget/canvas/path/arc.rs
index 343191f1..343191f1 100644
--- a/wgpu/src/widget/canvas/path/arc.rs
+++ b/graphics/src/widget/canvas/path/arc.rs
diff --git a/wgpu/src/widget/canvas/path/builder.rs b/graphics/src/widget/canvas/path/builder.rs
index 6511fa52..6511fa52 100644
--- a/wgpu/src/widget/canvas/path/builder.rs
+++ b/graphics/src/widget/canvas/path/builder.rs
diff --git a/wgpu/src/widget/canvas/program.rs b/graphics/src/widget/canvas/program.rs
index 725d9d72..725d9d72 100644
--- a/wgpu/src/widget/canvas/program.rs
+++ b/graphics/src/widget/canvas/program.rs
diff --git a/wgpu/src/widget/canvas/stroke.rs b/graphics/src/widget/canvas/stroke.rs
index 5b6fc56a..5b6fc56a 100644
--- a/wgpu/src/widget/canvas/stroke.rs
+++ b/graphics/src/widget/canvas/stroke.rs
diff --git a/wgpu/src/widget/canvas/text.rs b/graphics/src/widget/canvas/text.rs
index c4cae30e..c4cae30e 100644
--- a/wgpu/src/widget/canvas/text.rs
+++ b/graphics/src/widget/canvas/text.rs
diff --git a/graphics/src/widget/checkbox.rs b/graphics/src/widget/checkbox.rs
new file mode 100644
index 00000000..3c8b58de
--- /dev/null
+++ b/graphics/src/widget/checkbox.rs
@@ -0,0 +1,10 @@
+//! Show toggle controls using checkboxes.
+use crate::Renderer;
+
+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>>;
diff --git a/graphics/src/widget/container.rs b/graphics/src/widget/container.rs
new file mode 100644
index 00000000..c4c4e5ba
--- /dev/null
+++ b/graphics/src/widget/container.rs
@@ -0,0 +1,11 @@
+//! Decorate content and apply alignment.
+use crate::Renderer;
+
+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>>;
diff --git a/graphics/src/widget/pane_grid.rs b/graphics/src/widget/pane_grid.rs
new file mode 100644
index 00000000..34be8ee7
--- /dev/null
+++ b/graphics/src/widget/pane_grid.rs
@@ -0,0 +1,25 @@
+//! Let your users split regions of your application and organize layout dynamically.
+//!
+//! [![Pane grid - Iced](https://thumbs.gfycat.com/MixedFlatJellyfish-small.gif)](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::Renderer;
+
+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.
+///
+/// [![Pane grid - Iced](https://thumbs.gfycat.com/MixedFlatJellyfish-small.gif)](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>>;
diff --git a/graphics/src/widget/progress_bar.rs b/graphics/src/widget/progress_bar.rs
new file mode 100644
index 00000000..c1e5702e
--- /dev/null
+++ b/graphics/src/widget/progress_bar.rs
@@ -0,0 +1,15 @@
+//! 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::Renderer;
+
+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>>;
diff --git a/graphics/src/widget/radio.rs b/graphics/src/widget/radio.rs
new file mode 100644
index 00000000..c621a26a
--- /dev/null
+++ b/graphics/src/widget/radio.rs
@@ -0,0 +1,11 @@
+//! Create choices using radio buttons.
+use crate::Renderer;
+
+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>>;
diff --git a/graphics/src/widget/scrollable.rs b/graphics/src/widget/scrollable.rs
new file mode 100644
index 00000000..61eae587
--- /dev/null
+++ b/graphics/src/widget/scrollable.rs
@@ -0,0 +1,13 @@
+//! Navigate an endless amount of content with a scrollbar.
+use crate::Renderer;
+
+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>>;
diff --git a/graphics/src/widget/slider.rs b/graphics/src/widget/slider.rs
new file mode 100644
index 00000000..035c7c41
--- /dev/null
+++ b/graphics/src/widget/slider.rs
@@ -0,0 +1,17 @@
+//! 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::Renderer;
+
+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>>;
diff --git a/graphics/src/widget/text.rs b/graphics/src/widget/text.rs
new file mode 100644
index 00000000..ec0349f9
--- /dev/null
+++ b/graphics/src/widget/text.rs
@@ -0,0 +1,7 @@
+//! Write some text for your users to read.
+use crate::Renderer;
+
+/// 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>>;
diff --git a/graphics/src/widget/text_input.rs b/graphics/src/widget/text_input.rs
new file mode 100644
index 00000000..8015626b
--- /dev/null
+++ b/graphics/src/widget/text_input.rs
@@ -0,0 +1,16 @@
+//! Display fields that can be filled with text.
+//!
+//! A [`TextInput`] has some local [`State`].
+//!
+//! [`TextInput`]: struct.TextInput.html
+//! [`State`]: struct.State.html
+use crate::Renderer;
+
+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>>;