Move `ggez` example to `tour`

11 files changed, 0 insertions, 1395 deletions

diff --git a/examples/ggez/main.rs b/examples/ggez/main.rs
deleted file mode 100644
index 0a6a2005..00000000
--- a/examples/ggez/main.rs
+++ /dev/null
@@ -1,187 +0,0 @@
-mod renderer;
-mod tour;
-mod widget;
-
-use renderer::Renderer;
-use tour::Tour;
-use widget::Column;
-
-use ggez;
-use ggez::event;
-use ggez::filesystem;
-use ggez::graphics;
-use ggez::input::mouse;
-
-pub fn main() -> ggez::GameResult {
-    let (context, event_loop) = {
-        &mut ggez::ContextBuilder::new("iced", "ggez")
-            .window_mode(ggez::conf::WindowMode {
-                width: 850.0,
-                height: 850.0,
-                ..ggez::conf::WindowMode::default()
-            })
-            .build()?
-    };
-
-    filesystem::mount(
-        context,
-        std::path::Path::new(&format!(
-            "{}/examples/resources",
-            env!("CARGO_MANIFEST_DIR")
-        )),
-        true,
-    );
-
-    let state = &mut Game::new(context)?;
-
-    event::run(context, event_loop, state)
-}
-
-struct Game {
-    spritesheet: graphics::Image,
-    font: graphics::Font,
-    tour: Tour,
-
-    events: Vec<iced::Event>,
-    cache: Option<iced::Cache>,
-}
-
-impl Game {
-    fn new(context: &mut ggez::Context) -> ggez::GameResult<Game> {
-        graphics::set_default_filter(context, graphics::FilterMode::Nearest);
-
-        Ok(Game {
-            spritesheet: graphics::Image::new(context, "/ui.png").unwrap(),
-            font: graphics::Font::new(context, "/Roboto-Regular.ttf").unwrap(),
-            tour: Tour::new(context),
-
-            events: Vec::new(),
-            cache: Some(iced::Cache::default()),
-        })
-    }
-}
-
-impl event::EventHandler for Game {
-    fn update(&mut self, _ctx: &mut ggez::Context) -> ggez::GameResult {
-        Ok(())
-    }
-
-    fn mouse_button_down_event(
-        &mut self,
-        _context: &mut ggez::Context,
-        _button: mouse::MouseButton,
-        _x: f32,
-        _y: f32,
-    ) {
-        self.events.push(iced::Event::Mouse(
-            iced::input::mouse::Event::Input {
-                state: iced::input::ButtonState::Pressed,
-                button: iced::input::mouse::Button::Left, // TODO: Map `button`
-            },
-        ));
-    }
-
-    fn mouse_button_up_event(
-        &mut self,
-        _context: &mut ggez::Context,
-        _button: mouse::MouseButton,
-        _x: f32,
-        _y: f32,
-    ) {
-        self.events.push(iced::Event::Mouse(
-            iced::input::mouse::Event::Input {
-                state: iced::input::ButtonState::Released,
-                button: iced::input::mouse::Button::Left, // TODO: Map `button`
-            },
-        ));
-    }
-
-    fn mouse_motion_event(
-        &mut self,
-        _context: &mut ggez::Context,
-        x: f32,
-        y: f32,
-        _dx: f32,
-        _dy: f32,
-    ) {
-        self.events.push(iced::Event::Mouse(
-            iced::input::mouse::Event::CursorMoved { x, y },
-        ));
-    }
-
-    fn resize_event(
-        &mut self,
-        context: &mut ggez::Context,
-        width: f32,
-        height: f32,
-    ) {
-        graphics::set_screen_coordinates(
-            context,
-            graphics::Rect {
-                x: 0.0,
-                y: 0.0,
-                w: width,
-                h: height,
-            },
-        )
-        .expect("Set screen coordinates");
-    }
-
-    fn draw(&mut self, context: &mut ggez::Context) -> ggez::GameResult {
-        graphics::clear(context, graphics::WHITE);
-
-        let screen = graphics::screen_coordinates(context);
-
-        let (messages, cursor) = {
-            let layout = self.tour.layout();
-
-            let content = Column::new()
-                .width(screen.w as u16)
-                .height(screen.h as u16)
-                .align_items(iced::Align::Center)
-                .justify_content(iced::Justify::Center)
-                .push(layout);
-
-            let renderer = &mut Renderer::new(
-                context,
-                self.spritesheet.clone(),
-                self.font,
-            );
-
-            let mut ui = iced::UserInterface::build(
-                content,
-                self.cache.take().unwrap(),
-                renderer,
-            );
-
-            let messages = ui.update(self.events.drain(..));
-            let cursor = ui.draw(renderer);
-
-            self.cache = Some(ui.into_cache());
-
-            renderer.flush();
-
-            (messages, cursor)
-        };
-
-        for message in messages {
-            self.tour.react(message);
-        }
-
-        mouse::set_cursor_type(context, into_cursor_type(cursor));
-
-        graphics::present(context)?;
-        Ok(())
-    }
-}
-
-fn into_cursor_type(cursor: iced::MouseCursor) -> mouse::MouseCursor {
-    match cursor {
-        iced::MouseCursor::OutOfBounds => mouse::MouseCursor::Default,
-        iced::MouseCursor::Idle => mouse::MouseCursor::Default,
-        iced::MouseCursor::Pointer => mouse::MouseCursor::Hand,
-        iced::MouseCursor::Working => mouse::MouseCursor::Progress,
-        iced::MouseCursor::Grab => mouse::MouseCursor::Grab,
-        iced::MouseCursor::Grabbing => mouse::MouseCursor::Grabbing,
-    }
-}
diff --git a/examples/ggez/renderer.rs b/examples/ggez/renderer.rs
deleted file mode 100644
index 8746dd96..00000000
--- a/examples/ggez/renderer.rs
+++ /dev/null
@@ -1,63 +0,0 @@
-mod button;
-mod checkbox;
-mod debugger;
-mod image;
-mod radio;
-mod slider;
-mod text;
-
-use ggez::graphics::{
-    self, spritebatch::SpriteBatch, Font, Image, MeshBuilder,
-};
-use ggez::Context;
-
-pub struct Renderer<'a> {
-    pub context: &'a mut Context,
-    pub sprites: SpriteBatch,
-    pub spritesheet: Image,
-    pub font: Font,
-    font_size: f32,
-    debug_mesh: Option<MeshBuilder>,
-}
-
-impl Renderer<'_> {
-    pub fn new(
-        context: &mut Context,
-        spritesheet: Image,
-        font: Font,
-    ) -> Renderer {
-        Renderer {
-            context,
-            sprites: SpriteBatch::new(spritesheet.clone()),
-            spritesheet,
-            font,
-            font_size: 20.0,
-            debug_mesh: None,
-        }
-    }
-
-    pub fn flush(&mut self) {
-        graphics::draw(
-            self.context,
-            &self.sprites,
-            graphics::DrawParam::default(),
-        )
-        .expect("Draw sprites");
-
-        graphics::draw_queued_text(
-            self.context,
-            graphics::DrawParam::default(),
-            Default::default(),
-            graphics::FilterMode::Linear,
-        )
-        .expect("Draw text");
-
-        if let Some(debug_mesh) = self.debug_mesh.take() {
-            let mesh =
-                debug_mesh.build(self.context).expect("Build debug mesh");
-
-            graphics::draw(self.context, &mesh, graphics::DrawParam::default())
-                .expect("Draw debug mesh");
-        }
-    }
-}
diff --git a/examples/ggez/renderer/button.rs b/examples/ggez/renderer/button.rs
deleted file mode 100644
index 486e07ed..00000000
--- a/examples/ggez/renderer/button.rs
+++ /dev/null
@@ -1,145 +0,0 @@
-use super::Renderer;
-use ggez::graphics::{
-    self, Align, Color, DrawParam, Rect, Scale, Text, TextFragment, WHITE,
-};
-use iced::{button, MouseCursor};
-
-const LEFT: Rect = Rect {
-    x: 0.0,
-    y: 34.0,
-    w: 6.0,
-    h: 49.0,
-};
-
-const BACKGROUND: Rect = Rect {
-    x: LEFT.w,
-    y: LEFT.y,
-    w: 1.0,
-    h: LEFT.h,
-};
-
-const RIGHT: Rect = Rect {
-    x: LEFT.h - LEFT.w,
-    y: LEFT.y,
-    w: LEFT.w,
-    h: LEFT.h,
-};
-
-impl button::Renderer for Renderer<'_> {
-    fn draw(
-        &mut self,
-        cursor_position: iced::Point,
-        mut bounds: iced::Rectangle,
-        state: &button::State,
-        label: &str,
-        class: button::Class,
-    ) -> MouseCursor {
-        let mouse_over = bounds.contains(cursor_position);
-
-        let mut state_offset = 0.0;
-
-        if mouse_over {
-            if state.is_pressed() {
-                bounds.y += 4.0;
-                state_offset = RIGHT.x + RIGHT.w;
-            } else {
-                bounds.y -= 1.0;
-            }
-        }
-
-        let class_index = match class {
-            button::Class::Primary => 0,
-            button::Class::Secondary => 1,
-            button::Class::Positive => 2,
-        };
-
-        let width = self.spritesheet.width() as f32;
-        let height = self.spritesheet.height() as f32;
-
-        self.sprites.add(DrawParam {
-            src: Rect {
-                x: (LEFT.x + state_offset) / width,
-                y: (LEFT.y + class_index as f32 * LEFT.h) / height,
-                w: LEFT.w / width,
-                h: LEFT.h / height,
-            },
-            dest: ggez::mint::Point2 {
-                x: bounds.x,
-                y: bounds.y,
-            },
-            ..DrawParam::default()
-        });
-
-        self.sprites.add(DrawParam {
-            src: Rect {
-                x: (BACKGROUND.x + state_offset) / width,
-                y: (BACKGROUND.y + class_index as f32 * BACKGROUND.h) / height,
-                w: BACKGROUND.w / width,
-                h: BACKGROUND.h / height,
-            },
-            dest: ggez::mint::Point2 {
-                x: bounds.x + LEFT.w,
-                y: bounds.y,
-            },
-            scale: ggez::mint::Vector2 {
-                x: bounds.width - LEFT.w - RIGHT.w,
-                y: 1.0,
-            },
-            ..DrawParam::default()
-        });
-
-        self.sprites.add(DrawParam {
-            src: Rect {
-                x: (RIGHT.x + state_offset) / width,
-                y: (RIGHT.y + class_index as f32 * RIGHT.h) / height,
-                w: RIGHT.w / width,
-                h: RIGHT.h / height,
-            },
-            dest: ggez::mint::Point2 {
-                x: bounds.x + bounds.width - RIGHT.w,
-                y: bounds.y,
-            },
-            ..DrawParam::default()
-        });
-
-        let mut text = Text::new(TextFragment {
-            text: String::from(label),
-            font: Some(self.font),
-            scale: Some(Scale { x: 20.0, y: 20.0 }),
-            ..Default::default()
-        });
-
-        text.set_bounds(
-            ggez::mint::Point2 {
-                x: bounds.width,
-                y: bounds.height,
-            },
-            Align::Center,
-        );
-
-        graphics::queue_text(
-            self.context,
-            &text,
-            ggez::mint::Point2 {
-                x: bounds.x,
-                y: bounds.y + BACKGROUND.h / 4.0,
-            },
-            Some(if mouse_over {
-                WHITE
-            } else {
-                Color {
-                    r: 0.9,
-                    g: 0.9,
-                    b: 0.9,
-                    a: 1.0,
-                }
-            }),
-        );
-
-        if mouse_over {
-            MouseCursor::Pointer
-        } else {
-            MouseCursor::OutOfBounds
-        }
-    }
-}
diff --git a/examples/ggez/renderer/checkbox.rs b/examples/ggez/renderer/checkbox.rs
deleted file mode 100644
index 20a91be5..00000000
--- a/examples/ggez/renderer/checkbox.rs
+++ /dev/null
@@ -1,64 +0,0 @@
-use super::Renderer;
-
-use ggez::graphics::{DrawParam, Rect};
-use iced::{checkbox, MouseCursor};
-
-const SPRITE: Rect = Rect {
-    x: 98.0,
-    y: 0.0,
-    w: 28.0,
-    h: 28.0,
-};
-
-impl checkbox::Renderer for Renderer<'_> {
-    fn draw(
-        &mut self,
-        cursor_position: iced::Point,
-        bounds: iced::Rectangle,
-        text_bounds: iced::Rectangle,
-        is_checked: bool,
-    ) -> MouseCursor {
-        let mouse_over = bounds.contains(cursor_position)
-            || text_bounds.contains(cursor_position);
-
-        let width = self.spritesheet.width() as f32;
-        let height = self.spritesheet.height() as f32;
-
-        self.sprites.add(DrawParam {
-            src: Rect {
-                x: (SPRITE.x + (if mouse_over { SPRITE.w } else { 0.0 }))
-                    / width,
-                y: SPRITE.y / height,
-                w: SPRITE.w / width,
-                h: SPRITE.h / height,
-            },
-            dest: ggez::mint::Point2 {
-                x: bounds.x,
-                y: bounds.y,
-            },
-            ..DrawParam::default()
-        });
-
-        if is_checked {
-            self.sprites.add(DrawParam {
-                src: Rect {
-                    x: (SPRITE.x + SPRITE.w * 2.0) / width,
-                    y: SPRITE.y / height,
-                    w: SPRITE.w / width,
-                    h: SPRITE.h / height,
-                },
-                dest: ggez::mint::Point2 {
-                    x: bounds.x,
-                    y: bounds.y,
-                },
-                ..DrawParam::default()
-            });
-        }
-
-        if mouse_over {
-            MouseCursor::Pointer
-        } else {
-            MouseCursor::OutOfBounds
-        }
-    }
-}
diff --git a/examples/ggez/renderer/debugger.rs b/examples/ggez/renderer/debugger.rs
deleted file mode 100644
index 98124795..00000000
--- a/examples/ggez/renderer/debugger.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-use super::Renderer;
-use ggez::graphics::{Color, DrawMode, MeshBuilder, Rect};
-
-impl iced::renderer::Debugger for Renderer<'_> {
-    type Color = Color;
-
-    fn explain(&mut self, layout: &iced::Layout<'_>, color: Color) {
-        let bounds = layout.bounds();
-
-        let mut debug_mesh =
-            self.debug_mesh.take().unwrap_or(MeshBuilder::new());
-
-        debug_mesh.rectangle(
-            DrawMode::stroke(1.0),
-            Rect {
-                x: bounds.x,
-                y: bounds.y,
-                w: bounds.width,
-                h: bounds.height,
-            },
-            color,
-        );
-
-        self.debug_mesh = Some(debug_mesh);
-
-        for child in layout.children() {
-            self.explain(&child, color);
-        }
-    }
-}
diff --git a/examples/ggez/renderer/image.rs b/examples/ggez/renderer/image.rs
deleted file mode 100644
index c3ead5c9..00000000
--- a/examples/ggez/renderer/image.rs
+++ /dev/null
@@ -1,51 +0,0 @@
-use super::Renderer;
-
-use ggez::{graphics, nalgebra};
-use iced::image;
-
-impl image::Renderer<graphics::Image> for Renderer<'_> {
-    fn node(
-        &self,
-        style: iced::Style,
-        image: &graphics::Image,
-        width: Option<u16>,
-        height: Option<u16>,
-        _source: Option<iced::Rectangle<u16>>,
-    ) -> iced::Node {
-        let aspect_ratio = image.width() as f32 / image.height() as f32;
-
-        let style = match (width, height) {
-            (Some(width), Some(height)) => style.width(width).height(height),
-            (Some(width), None) => style
-                .width(width)
-                .height((width as f32 / aspect_ratio).round() as u16),
-            (None, Some(height)) => style
-                .height(height)
-                .width((height as f32 * aspect_ratio).round() as u16),
-            (None, None) => style.width(image.width()).height(image.height()),
-        };
-
-        iced::Node::new(style)
-    }
-
-    fn draw(
-        &mut self,
-        image: &graphics::Image,
-        bounds: iced::Rectangle,
-        _source: Option<iced::Rectangle<u16>>,
-    ) {
-        // We should probably use batches to draw images efficiently and keep
-        // draw side-effect free, but this is good enough for the example.
-        graphics::draw(
-            self.context,
-            image,
-            graphics::DrawParam::new()
-                .dest(nalgebra::Point2::new(bounds.x, bounds.y))
-                .scale(nalgebra::Vector2::new(
-                    bounds.width / image.width() as f32,
-                    bounds.height / image.height() as f32,
-                )),
-        )
-        .expect("Draw image");
-    }
-}
diff --git a/examples/ggez/renderer/radio.rs b/examples/ggez/renderer/radio.rs
deleted file mode 100644
index 0f7815d6..00000000
--- a/examples/ggez/renderer/radio.rs
+++ /dev/null
@@ -1,63 +0,0 @@
-use super::Renderer;
-
-use ggez::graphics::{DrawParam, Rect};
-use iced::{radio, MouseCursor, Point, Rectangle};
-
-const SPRITE: Rect = Rect {
-    x: 98.0,
-    y: 28.0,
-    w: 28.0,
-    h: 28.0,
-};
-
-impl radio::Renderer for Renderer<'_> {
-    fn draw(
-        &mut self,
-        cursor_position: Point,
-        bounds: Rectangle,
-        bounds_with_label: Rectangle,
-        is_selected: bool,
-    ) -> MouseCursor {
-        let mouse_over = bounds_with_label.contains(cursor_position);
-
-        let width = self.spritesheet.width() as f32;
-        let height = self.spritesheet.height() as f32;
-
-        self.sprites.add(DrawParam {
-            src: Rect {
-                x: (SPRITE.x + (if mouse_over { SPRITE.w } else { 0.0 }))
-                    / width,
-                y: SPRITE.y / height,
-                w: SPRITE.w / width,
-                h: SPRITE.h / height,
-            },
-            dest: ggez::mint::Point2 {
-                x: bounds.x,
-                y: bounds.y,
-            },
-            ..DrawParam::default()
-        });
-
-        if is_selected {
-            self.sprites.add(DrawParam {
-                src: Rect {
-                    x: (SPRITE.x + SPRITE.w * 2.0) / width,
-                    y: SPRITE.y / height,
-                    w: SPRITE.w / width,
-                    h: SPRITE.h / height,
-                },
-                dest: ggez::mint::Point2 {
-                    x: bounds.x,
-                    y: bounds.y,
-                },
-                ..DrawParam::default()
-            });
-        }
-
-        if mouse_over {
-            MouseCursor::Pointer
-        } else {
-            MouseCursor::OutOfBounds
-        }
-    }
-}
diff --git a/examples/ggez/renderer/slider.rs b/examples/ggez/renderer/slider.rs
deleted file mode 100644
index 146cee18..00000000
--- a/examples/ggez/renderer/slider.rs
+++ /dev/null
@@ -1,82 +0,0 @@
-use super::Renderer;
-
-use ggez::graphics::{DrawParam, Rect};
-use iced::{slider, MouseCursor, Point, Rectangle};
-use std::ops::RangeInclusive;
-
-const RAIL: Rect = Rect {
-    x: 98.0,
-    y: 56.0,
-    w: 1.0,
-    h: 4.0,
-};
-
-const MARKER: Rect = Rect {
-    x: RAIL.x + 28.0,
-    y: RAIL.y,
-    w: 16.0,
-    h: 24.0,
-};
-
-impl slider::Renderer for Renderer<'_> {
-    fn draw(
-        &mut self,
-        cursor_position: Point,
-        bounds: Rectangle,
-        state: &slider::State,
-        range: RangeInclusive<f32>,
-        value: f32,
-    ) -> MouseCursor {
-        let width = self.spritesheet.width() as f32;
-        let height = self.spritesheet.height() as f32;
-
-        self.sprites.add(DrawParam {
-            src: Rect {
-                x: RAIL.x / width,
-                y: RAIL.y / height,
-                w: RAIL.w / width,
-                h: RAIL.h / height,
-            },
-            dest: ggez::mint::Point2 {
-                x: bounds.x + MARKER.w as f32 / 2.0,
-                y: bounds.y + 12.5,
-            },
-            scale: ggez::mint::Vector2 {
-                x: bounds.width - MARKER.w as f32,
-                y: 1.0,
-            },
-            ..DrawParam::default()
-        });
-
-        let (range_start, range_end) = range.into_inner();
-
-        let marker_offset = (bounds.width - MARKER.w as f32)
-            * ((value - range_start) / (range_end - range_start).max(1.0));
-
-        let mouse_over = bounds.contains(cursor_position);
-        let is_active = state.is_dragging() || mouse_over;
-
-        self.sprites.add(DrawParam {
-            src: Rect {
-                x: (MARKER.x + (if is_active { MARKER.w } else { 0.0 }))
-                    / width,
-                y: MARKER.y / height,
-                w: MARKER.w / width,
-                h: MARKER.h / height,
-            },
-            dest: ggez::mint::Point2 {
-                x: bounds.x + marker_offset.round(),
-                y: bounds.y + (if state.is_dragging() { 2.0 } else { 0.0 }),
-            },
-            ..DrawParam::default()
-        });
-
-        if state.is_dragging() {
-            MouseCursor::Grabbing
-        } else if mouse_over {
-            MouseCursor::Grab
-        } else {
-            MouseCursor::OutOfBounds
-        }
-    }
-}
diff --git a/examples/ggez/renderer/text.rs b/examples/ggez/renderer/text.rs
deleted file mode 100644
index ecf1481e..00000000
--- a/examples/ggez/renderer/text.rs
+++ /dev/null
@@ -1,118 +0,0 @@
-use super::Renderer;
-use ggez::graphics::{self, mint, Align, Color, Scale, Text, TextFragment};
-
-use iced::text;
-use std::cell::RefCell;
-use std::f32;
-
-impl text::Renderer<Color> for Renderer<'_> {
-    fn node(
-        &self,
-        style: iced::Style,
-        content: &str,
-        size: Option<u16>,
-    ) -> iced::Node {
-        let font = self.font;
-        let font_cache = graphics::font_cache(self.context);
-        let content = String::from(content);
-
-        // TODO: Investigate why stretch tries to measure this MANY times
-        // with every ancestor's bounds.
-        // Bug? Using the library wrong? I should probably open an issue on
-        // the stretch repository.
-        // I noticed that the first measure is the one that matters in
-        // practice. Here, we use a RefCell to store the cached measurement.
-        let measure = RefCell::new(None);
-        let size = size.map(f32::from).unwrap_or(self.font_size);
-
-        iced::Node::with_measure(style, move |bounds| {
-            let mut measure = measure.borrow_mut();
-
-            if measure.is_none() {
-                let bounds = (
-                    match bounds.width {
-                        iced::Number::Undefined => f32::INFINITY,
-                        iced::Number::Defined(w) => w,
-                    },
-                    match bounds.height {
-                        iced::Number::Undefined => f32::INFINITY,
-                        iced::Number::Defined(h) => h,
-                    },
-                );
-
-                let mut text = Text::new(TextFragment {
-                    text: content.clone(),
-                    font: Some(font),
-                    scale: Some(Scale { x: size, y: size }),
-                    ..Default::default()
-                });
-
-                text.set_bounds(
-                    mint::Point2 {
-                        x: bounds.0,
-                        y: bounds.1,
-                    },
-                    Align::Left,
-                );
-
-                let (width, height) = font_cache.dimensions(&text);
-
-                let size = iced::Size {
-                    width: width as f32,
-                    height: height as f32,
-                };
-
-                // If the text has no width boundary we avoid caching as the
-                // layout engine may just be measuring text in a row.
-                if bounds.0 == f32::INFINITY {
-                    return size;
-                } else {
-                    *measure = Some(size);
-                }
-            }
-
-            measure.unwrap()
-        })
-    }
-
-    fn draw(
-        &mut self,
-        bounds: iced::Rectangle,
-        content: &str,
-        size: Option<u16>,
-        color: Option<Color>,
-        horizontal_alignment: text::HorizontalAlignment,
-        _vertical_alignment: text::VerticalAlignment,
-    ) {
-        let size = size.map(f32::from).unwrap_or(self.font_size);
-
-        let mut text = Text::new(TextFragment {
-            text: String::from(content),
-            font: Some(self.font),
-            scale: Some(Scale { x: size, y: size }),
-            ..Default::default()
-        });
-
-        text.set_bounds(
-            mint::Point2 {
-                x: bounds.width,
-                y: bounds.height,
-            },
-            match horizontal_alignment {
-                text::HorizontalAlignment::Left => graphics::Align::Left,
-                text::HorizontalAlignment::Center => graphics::Align::Center,
-                text::HorizontalAlignment::Right => graphics::Align::Right,
-            },
-        );
-
-        graphics::queue_text(
-            self.context,
-            &text,
-            mint::Point2 {
-                x: bounds.x,
-                y: bounds.y,
-            },
-            color.or(Some(graphics::BLACK)),
-        );
-    }
-}
diff --git a/examples/ggez/tour.rs b/examples/ggez/tour.rs
deleted file mode 100644
index c2126675..00000000
--- a/examples/ggez/tour.rs
+++ /dev/null
@@ -1,578 +0,0 @@
-use super::widget::{
-    button, slider, Button, Checkbox, Column, Element, Image, Radio, Row,
-    Slider, Text,
-};
-
-use ggez::graphics::{self, Color, FilterMode, BLACK};
-use ggez::Context;
-use iced::{text::HorizontalAlignment, Align};
-
-pub struct Tour {
-    steps: Steps,
-    back_button: button::State,
-    next_button: button::State,
-    debug: bool,
-}
-
-impl Tour {
-    pub fn new(context: &mut Context) -> Tour {
-        Tour {
-            steps: Steps::new(context),
-            back_button: button::State::new(),
-            next_button: button::State::new(),
-            debug: false,
-        }
-    }
-
-    pub fn react(&mut self, event: Message) {
-        match event {
-            Message::BackPressed => {
-                self.steps.go_back();
-            }
-            Message::NextPressed => {
-                self.steps.advance();
-            }
-            Message::StepMessage(step_msg) => {
-                self.steps.update(step_msg, &mut self.debug);
-            }
-        }
-    }
-
-    pub fn layout(&mut self) -> Element<Message> {
-        let Tour {
-            steps,
-            back_button,
-            next_button,
-            ..
-        } = self;
-
-        let mut controls = Row::new();
-
-        if steps.has_previous() {
-            controls = controls.push(
-                Button::new(back_button, "Back")
-                    .on_press(Message::BackPressed)
-                    .class(button::Class::Secondary),
-            );
-        }
-
-        controls = controls.push(Column::new());
-
-        if steps.can_continue() {
-            controls = controls.push(
-                Button::new(next_button, "Next").on_press(Message::NextPressed),
-            );
-        }
-
-        let element: Element<_> = Column::new()
-            .max_width(500)
-            .spacing(20)
-            .push(steps.layout(self.debug).map(Message::StepMessage))
-            .push(controls)
-            .into();
-
-        if self.debug {
-            element.explain(BLACK)
-        } else {
-            element
-        }
-    }
-}
-
-#[derive(Debug, Clone, Copy)]
-pub enum Message {
-    BackPressed,
-    NextPressed,
-    StepMessage(StepMessage),
-}
-
-struct Steps {
-    steps: Vec<Step>,
-    current: usize,
-}
-
-impl Steps {
-    fn new(context: &mut Context) -> Steps {
-        Steps {
-            steps: vec![
-                Step::Welcome,
-                Step::Slider {
-                    state: slider::State::new(),
-                    value: 50,
-                },
-                Step::RowsAndColumns {
-                    layout: Layout::Row,
-                    spacing_slider: slider::State::new(),
-                    spacing: 20,
-                },
-                Step::Text {
-                    size_slider: slider::State::new(),
-                    size: 30,
-                    color_sliders: [slider::State::new(); 3],
-                    color: BLACK,
-                },
-                Step::Radio { selection: None },
-                Step::Image {
-                    ferris: {
-                        let mut image =
-                            graphics::Image::new(context, "/ferris.png")
-                                .expect("Load ferris image");
-
-                        image.set_filter(FilterMode::Linear);
-
-                        image
-                    },
-                    width: 300,
-                    slider: slider::State::new(),
-                },
-                Step::Debugger,
-                Step::End,
-            ],
-            current: 0,
-        }
-    }
-
-    fn update(&mut self, msg: StepMessage, debug: &mut bool) {
-        self.steps[self.current].update(msg, debug);
-    }
-
-    fn layout(&mut self, debug: bool) -> Element<StepMessage> {
-        self.steps[self.current].layout(debug)
-    }
-
-    fn advance(&mut self) {
-        if self.can_continue() {
-            self.current += 1;
-        }
-    }
-
-    fn go_back(&mut self) {
-        if self.has_previous() {
-            self.current -= 1;
-        }
-    }
-
-    fn has_previous(&self) -> bool {
-        self.current > 0
-    }
-
-    fn can_continue(&self) -> bool {
-        self.current + 1 < self.steps.len()
-            && self.steps[self.current].can_continue()
-    }
-}
-
-enum Step {
-    Welcome,
-    Slider {
-        state: slider::State,
-        value: u16,
-    },
-    RowsAndColumns {
-        layout: Layout,
-        spacing_slider: slider::State,
-        spacing: u16,
-    },
-    Text {
-        size_slider: slider::State,
-        size: u16,
-        color_sliders: [slider::State; 3],
-        color: Color,
-    },
-    Radio {
-        selection: Option<Language>,
-    },
-    Image {
-        ferris: graphics::Image,
-        width: u16,
-        slider: slider::State,
-    },
-    Debugger,
-    End,
-}
-
-#[derive(Debug, Clone, Copy)]
-pub enum StepMessage {
-    SliderChanged(f32),
-    LayoutChanged(Layout),
-    SpacingChanged(f32),
-    TextSizeChanged(f32),
-    TextColorChanged(Color),
-    LanguageSelected(Language),
-    ImageWidthChanged(f32),
-    DebugToggled(bool),
-}
-
-impl<'a> Step {
-    fn update(&mut self, msg: StepMessage, debug: &mut bool) {
-        match msg {
-            StepMessage::DebugToggled(value) => {
-                if let Step::Debugger = self {
-                    *debug = value;
-                }
-            }
-            StepMessage::LanguageSelected(language) => {
-                if let Step::Radio { selection } = self {
-                    *selection = Some(language);
-                }
-            }
-            StepMessage::SliderChanged(new_value) => {
-                if let Step::Slider { value, .. } = self {
-                    *value = new_value.round() as u16;
-                }
-            }
-            StepMessage::TextSizeChanged(new_size) => {
-                if let Step::Text { size, .. } = self {
-                    *size = new_size.round() as u16;
-                }
-            }
-            StepMessage::TextColorChanged(new_color) => {
-                if let Step::Text { color, .. } = self {
-                    *color = new_color;
-                }
-            }
-            StepMessage::LayoutChanged(new_layout) => {
-                if let Step::RowsAndColumns { layout, .. } = self {
-                    *layout = new_layout;
-                }
-            }
-            StepMessage::SpacingChanged(new_spacing) => {
-                if let Step::RowsAndColumns { spacing, .. } = self {
-                    *spacing = new_spacing.round() as u16;
-                }
-            }
-            StepMessage::ImageWidthChanged(new_width) => {
-                if let Step::Image { width, .. } = self {
-                    *width = new_width.round() as u16;
-                }
-            }
-        };
-    }
-
-    fn can_continue(&self) -> bool {
-        match self {
-            Step::Welcome => true,
-            Step::Radio { selection } => *selection == Some(Language::Rust),
-            Step::Slider { .. } => true,
-            Step::Text { .. } => true,
-            Step::Image { .. } => true,
-            Step::RowsAndColumns { .. } => true,
-            Step::Debugger => true,
-            Step::End => false,
-        }
-    }
-
-    fn layout(&mut self, debug: bool) -> Element<StepMessage> {
-        match self {
-            Step::Welcome => Self::welcome().into(),
-            Step::Radio { selection } => Self::radio(*selection).into(),
-            Step::Slider { state, value } => Self::slider(state, *value).into(),
-            Step::Text {
-                size_slider,
-                size,
-                color_sliders,
-                color,
-            } => Self::text(size_slider, *size, color_sliders, *color).into(),
-            Step::Image {
-                ferris,
-                width,
-                slider,
-            } => Self::image(ferris.clone(), *width, slider).into(),
-            Step::RowsAndColumns {
-                layout,
-                spacing_slider,
-                spacing,
-            } => {
-                Self::rows_and_columns(*layout, spacing_slider, *spacing).into()
-            }
-            Step::Debugger => Self::debugger(debug).into(),
-            Step::End => Self::end().into(),
-        }
-    }
-
-    fn container(title: &str) -> Column<'a, StepMessage> {
-        Column::new()
-            .spacing(20)
-            .align_items(Align::Stretch)
-            .push(Text::new(title).size(50))
-    }
-
-    fn welcome() -> Column<'a, StepMessage> {
-        Self::container("Welcome!")
-            .push(Text::new(
-                "This a simple tour meant to showcase a bunch of widgets that \
-                 can be easily implemented on top of Iced.",
-            ))
-            .push(Text::new(
-                "Iced is a renderer-agnostic GUI library for Rust focused on \
-                 simplicity and type-safety. It is heavily inspired by Elm.",
-            ))
-            .push(Text::new(
-                "It was originally born as part of Coffee, an opinionated \
-                 2D game engine for Rust.",
-            ))
-            .push(Text::new(
-                "Iced does not provide a built-in renderer. This example runs \
-                 on a fairly simple renderer built on top of ggez, another \
-                 game library.",
-            ))
-            .push(Text::new(
-                "You will need to interact with the UI in order to reach the \
-                 end!",
-            ))
-    }
-
-    fn slider(
-        state: &'a mut slider::State,
-        value: u16,
-    ) -> Column<'a, StepMessage> {
-        Self::container("Slider")
-            .push(Text::new(
-                "A slider allows you to smoothly select a value from a range \
-                 of values.",
-            ))
-            .push(Text::new(
-                "The following slider lets you choose an integer from \
-                 0 to 100:",
-            ))
-            .push(Slider::new(
-                state,
-                0.0..=100.0,
-                value as f32,
-                StepMessage::SliderChanged,
-            ))
-            .push(
-                Text::new(&value.to_string())
-                    .horizontal_alignment(HorizontalAlignment::Center),
-            )
-    }
-
-    fn rows_and_columns(
-        layout: Layout,
-        spacing_slider: &'a mut slider::State,
-        spacing: u16,
-    ) -> Column<'a, StepMessage> {
-        let row_radio = Radio::new(
-            Layout::Row,
-            "Row",
-            Some(layout),
-            StepMessage::LayoutChanged,
-        );
-
-        let column_radio = Radio::new(
-            Layout::Column,
-            "Column",
-            Some(layout),
-            StepMessage::LayoutChanged,
-        );
-
-        let layout_section: Element<_> = match layout {
-            Layout::Row => Row::new()
-                .spacing(spacing)
-                .push(row_radio)
-                .push(column_radio)
-                .into(),
-            Layout::Column => Column::new()
-                .spacing(spacing)
-                .push(row_radio)
-                .push(column_radio)
-                .into(),
-        };
-
-        let spacing_section = Column::new()
-            .spacing(10)
-            .push(Slider::new(
-                spacing_slider,
-                0.0..=80.0,
-                spacing as f32,
-                StepMessage::SpacingChanged,
-            ))
-            .push(
-                Text::new(&format!("{} px", spacing))
-                    .horizontal_alignment(HorizontalAlignment::Center),
-            );
-
-        Self::container("Rows and columns")
-            .spacing(spacing)
-            .push(Text::new(
-                "Iced uses a layout model based on flexbox to position UI \
-                 elements.",
-            ))
-            .push(Text::new(
-                "Rows and columns can be used to distribute content \
-                 horizontally or vertically, respectively.",
-            ))
-            .push(layout_section)
-            .push(Text::new(
-                "You can also easily change the spacing between elements:",
-            ))
-            .push(spacing_section)
-    }
-
-    fn text(
-        size_slider: &'a mut slider::State,
-        size: u16,
-        color_sliders: &'a mut [slider::State; 3],
-        color: Color,
-    ) -> Column<'a, StepMessage> {
-        let size_section = Column::new()
-            .padding(20)
-            .spacing(20)
-            .push(Text::new("You can change its size:"))
-            .push(
-                Text::new(&format!("This text is {} pixels", size)).size(size),
-            )
-            .push(Slider::new(
-                size_slider,
-                10.0..=70.0,
-                size as f32,
-                StepMessage::TextSizeChanged,
-            ));
-
-        let [red, green, blue] = color_sliders;
-        let color_section = Column::new()
-            .padding(20)
-            .spacing(20)
-            .push(Text::new("And its color:"))
-            .push(Text::new(&format!("{:?}", color)).color(color))
-            .push(
-                Row::new()
-                    .spacing(10)
-                    .push(Slider::new(red, 0.0..=1.0, color.r, move |r| {
-                        StepMessage::TextColorChanged(Color { r, ..color })
-                    }))
-                    .push(Slider::new(green, 0.0..=1.0, color.g, move |g| {
-                        StepMessage::TextColorChanged(Color { g, ..color })
-                    }))
-                    .push(Slider::new(blue, 0.0..=1.0, color.b, move |b| {
-                        StepMessage::TextColorChanged(Color { b, ..color })
-                    })),
-            );
-
-        Self::container("Text")
-            .push(Text::new(
-                "Text is probably the most essential widget for your UI. \
-                 It will try to adapt to the dimensions of its container.",
-            ))
-            .push(size_section)
-            .push(color_section)
-    }
-
-    fn radio(selection: Option<Language>) -> Column<'a, StepMessage> {
-        let question = Column::new()
-            .padding(20)
-            .spacing(10)
-            .push(Text::new("Iced is written in...").size(24))
-            .push(Language::all().iter().cloned().fold(
-                Column::new().padding(10).spacing(20),
-                |choices, language| {
-                    choices.push(Radio::new(
-                        language,
-                        language.into(),
-                        selection,
-                        StepMessage::LanguageSelected,
-                    ))
-                },
-            ));
-
-        Self::container("Radio button")
-            .push(Text::new(
-                "A radio button is normally used to represent a choice... \
-                 Surprise test!",
-            ))
-            .push(question)
-            .push(Text::new(
-                "Iced works very well with iterators! The list above is \
-                 basically created by folding a column over the different \
-                 choices, creating a radio button for each one of them!",
-            ))
-    }
-
-    fn image(
-        ferris: graphics::Image,
-        width: u16,
-        slider: &'a mut slider::State,
-    ) -> Column<'a, StepMessage> {
-        Self::container("Image")
-            .push(Text::new("An image that tries to keep its aspect ratio."))
-            .push(Image::new(ferris).width(width).align_self(Align::Center))
-            .push(Slider::new(
-                slider,
-                100.0..=500.0,
-                width as f32,
-                StepMessage::ImageWidthChanged,
-            ))
-            .push(
-                Text::new(&format!("Width: {} px", width.to_string()))
-                    .horizontal_alignment(HorizontalAlignment::Center),
-            )
-    }
-
-    fn debugger(debug: bool) -> Column<'a, StepMessage> {
-        Self::container("Debugger")
-            .push(Text::new(
-                "You can ask Iced to visually explain the layouting of the \
-                 different elements comprising your UI!",
-            ))
-            .push(Text::new(
-                "Give it a shot! Check the following checkbox to be able to \
-                 see element boundaries.",
-            ))
-            .push(Checkbox::new(
-                debug,
-                "Explain layout",
-                StepMessage::DebugToggled,
-            ))
-            .push(Text::new("Feel free to go back and take a look."))
-    }
-
-    fn end() -> Column<'a, StepMessage> {
-        Self::container("You reached the end!")
-            .push(Text::new(
-                "This tour will be updated as more features are added.",
-            ))
-            .push(Text::new("Make sure to keep an eye on it!"))
-    }
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub enum Language {
-    Rust,
-    Elm,
-    Ruby,
-    Haskell,
-    C,
-    Other,
-}
-
-impl Language {
-    fn all() -> [Language; 6] {
-        [
-            Language::C,
-            Language::Elm,
-            Language::Ruby,
-            Language::Haskell,
-            Language::Rust,
-            Language::Other,
-        ]
-    }
-}
-
-impl From<Language> for &str {
-    fn from(language: Language) -> &'static str {
-        match language {
-            Language::Rust => "Rust",
-            Language::Elm => "Elm",
-            Language::Ruby => "Ruby",
-            Language::Haskell => "Haskell",
-            Language::C => "C",
-            Language::Other => "Other",
-        }
-    }
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub enum Layout {
-    Row,
-    Column,
-}
diff --git a/examples/ggez/widget.rs b/examples/ggez/widget.rs
deleted file mode 100644
index 9a141c83..00000000
--- a/examples/ggez/widget.rs
+++ /dev/null
@@ -1,14 +0,0 @@
-use super::Renderer;
-
-use ggez::graphics::{self, Color};
-
-pub use iced::{button, slider, Button, Slider};
-
-pub type Text = iced::Text<Color>;
-pub type Checkbox<Message> = iced::Checkbox<Color, Message>;
-pub type Radio<Message> = iced::Radio<Color, Message>;
-pub type Image = iced::Image<graphics::Image>;
-
-pub type Column<'a, Message> = iced::Column<'a, Message, Renderer<'a>>;
-pub type Row<'a, Message> = iced::Row<'a, Message, Renderer<'a>>;
-pub type Element<'a, Message> = iced::Element<'a, Message, Renderer<'a>>;