Merge pull request #37 from hecrj/feature/text-input

Text input widget

21 files changed, 741 insertions, 60 deletions

diff --git a/core/src/vector.rs b/core/src/vector.rs
index f45daab9..92bf64ff 100644
--- a/core/src/vector.rs
+++ b/core/src/vector.rs
@@ -1,15 +1,26 @@
 /// A 2D vector.
 #[derive(Debug, Clone, Copy, PartialEq)]
-pub struct Vector {
-    pub x: f32,
-    pub y: f32,
+pub struct Vector<T = f32> {
+    pub x: T,
+    pub y: T,
 }
 
-impl Vector {
+impl<T> Vector<T> {
     /// Creates a new [`Vector`] with the given components.
     ///
     /// [`Vector`]: struct.Vector.html
-    pub fn new(x: f32, y: f32) -> Self {
+    pub fn new(x: T, y: T) -> Self {
         Self { x, y }
     }
 }
+
+impl<T> std::ops::Add for Vector<T>
+where
+    T: std::ops::Add<Output = T>,
+{
+    type Output = Self;
+
+    fn add(self, b: Self) -> Self {
+        Self::new(self.x + b.x, self.y + b.y)
+    }
+}
diff --git a/core/src/widget.rs b/core/src/widget.rs
index 3ee8e347..41c4c6a8 100644
--- a/core/src/widget.rs
+++ b/core/src/widget.rs
@@ -17,18 +17,18 @@ pub mod button;
 pub mod scrollable;
 pub mod slider;
 pub mod text;
+pub mod text_input;
 
 #[doc(no_inline)]
 pub use button::Button;
-
+#[doc(no_inline)]
+pub use scrollable::Scrollable;
 #[doc(no_inline)]
 pub use slider::Slider;
-
 #[doc(no_inline)]
 pub use text::Text;
-
 #[doc(no_inline)]
-pub use scrollable::Scrollable;
+pub use text_input::TextInput;
 
 pub use checkbox::Checkbox;
 pub use column::Column;
diff --git a/core/src/widget/text_input.rs b/core/src/widget/text_input.rs
new file mode 100644
index 00000000..e5d6b70d
--- /dev/null
+++ b/core/src/widget/text_input.rs
@@ -0,0 +1,148 @@
+use crate::Length;
+
+pub struct TextInput<'a, Message> {
+    pub state: &'a mut State,
+    pub placeholder: String,
+    pub value: Value,
+    pub width: Length,
+    pub max_width: Length,
+    pub padding: u16,
+    pub size: Option<u16>,
+    pub on_change: Box<dyn Fn(String) -> Message>,
+    pub on_submit: Option<Message>,
+}
+
+impl<'a, Message> TextInput<'a, Message> {
+    pub fn new<F>(
+        state: &'a mut State,
+        placeholder: &str,
+        value: &str,
+        on_change: F,
+    ) -> Self
+    where
+        F: 'static + Fn(String) -> Message,
+    {
+        Self {
+            state,
+            placeholder: String::from(placeholder),
+            value: Value::new(value),
+            width: Length::Fill,
+            max_width: Length::Shrink,
+            padding: 0,
+            size: None,
+            on_change: Box::new(on_change),
+            on_submit: None,
+        }
+    }
+
+    /// Sets the width of the [`TextInput`].
+    ///
+    /// [`TextInput`]: struct.TextInput.html
+    pub fn width(mut self, width: Length) -> Self {
+        self.width = width;
+        self
+    }
+
+    /// Sets the maximum width of the [`TextInput`].
+    ///
+    /// [`TextInput`]: struct.TextInput.html
+    pub fn max_width(mut self, max_width: Length) -> Self {
+        self.max_width = max_width;
+        self
+    }
+
+    /// Sets the padding of the [`TextInput`].
+    ///
+    /// [`TextInput`]: struct.TextInput.html
+    pub fn padding(mut self, units: u16) -> Self {
+        self.padding = units;
+        self
+    }
+
+    pub fn size(mut self, size: u16) -> Self {
+        self.size = Some(size);
+        self
+    }
+
+    pub fn on_submit(mut self, message: Message) -> Self {
+        self.on_submit = Some(message);
+        self
+    }
+}
+
+impl<'a, Message> std::fmt::Debug for TextInput<'a, Message>
+where
+    Message: std::fmt::Debug,
+{
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        // TODO: Complete once stabilized
+        f.debug_struct("TextInput").finish()
+    }
+}
+
+#[derive(Debug, Default)]
+pub struct State {
+    pub is_focused: bool,
+    cursor_position: usize,
+}
+
+impl State {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn move_cursor_right(&mut self, value: &Value) {
+        let current = self.cursor_position(value);
+
+        if current < value.len() {
+            self.cursor_position = current + 1;
+        }
+    }
+
+    pub fn move_cursor_left(&mut self, value: &Value) {
+        let current = self.cursor_position(value);
+
+        if current > 0 {
+            self.cursor_position = current - 1;
+        }
+    }
+
+    pub fn cursor_position(&self, value: &Value) -> usize {
+        self.cursor_position.min(value.len())
+    }
+}
+
+// TODO: Use `unicode-segmentation`
+pub struct Value(Vec<char>);
+
+impl Value {
+    pub fn new(string: &str) -> Self {
+        Self(string.chars().collect())
+    }
+
+    pub fn len(&self) -> usize {
+        self.0.len()
+    }
+
+    pub fn until(&self, index: usize) -> Self {
+        Self(self.0[..index.min(self.len())].iter().cloned().collect())
+    }
+
+    pub fn to_string(&self) -> String {
+        let mut string = String::new();
+
+        for c in self.0.iter() {
+            string.push(*c);
+        }
+
+        string
+    }
+
+    pub fn insert(&mut self, index: usize, c: char) {
+        self.0.insert(index, c);
+    }
+
+    pub fn remove(&mut self, index: usize) {
+        self.0.remove(index);
+    }
+}
diff --git a/examples/todos.rs b/examples/todos.rs
new file mode 100644
index 00000000..9581262a
--- /dev/null
+++ b/examples/todos.rs
@@ -0,0 +1,116 @@
+use iced::{
+    scrollable, text::HorizontalAlignment, text_input, Align, Application,
+    Checkbox, Color, Column, Element, Length, Scrollable, Text, TextInput,
+};
+
+pub fn main() {
+    Todos::default().run()
+}
+
+#[derive(Debug, Default)]
+struct Todos {
+    scroll: scrollable::State,
+    input: text_input::State,
+    input_value: String,
+    tasks: Vec<Task>,
+}
+
+#[derive(Debug, Clone)]
+pub enum Message {
+    InputChanged(String),
+    CreateTask,
+    TaskChanged(usize, bool),
+}
+
+impl Application for Todos {
+    type Message = Message;
+
+    fn update(&mut self, message: Message) {
+        match message {
+            Message::InputChanged(value) => {
+                self.input_value = value;
+            }
+            Message::CreateTask => {
+                if !self.input_value.is_empty() {
+                    self.tasks.push(Task::new(self.input_value.clone()));
+                    self.input_value = String::new();
+                }
+            }
+            Message::TaskChanged(i, completed) => {
+                if let Some(task) = self.tasks.get_mut(i) {
+                    task.completed = completed;
+                }
+            }
+        }
+
+        dbg!(self);
+    }
+
+    fn view(&mut self) -> Element<Message> {
+        let title = Text::new("todos")
+            .size(100)
+            .color(GRAY)
+            .horizontal_alignment(HorizontalAlignment::Center);
+
+        let input = TextInput::new(
+            &mut self.input,
+            "What needs to be done?",
+            &self.input_value,
+            Message::InputChanged,
+        )
+        .padding(15)
+        .size(30)
+        .on_submit(Message::CreateTask);
+
+        let tasks = self.tasks.iter_mut().enumerate().fold(
+            Column::new().spacing(20),
+            |column, (i, task)| {
+                column.push(
+                    task.view()
+                        .map(move |state| Message::TaskChanged(i, state)),
+                )
+            },
+        );
+
+        let content = Column::new()
+            .max_width(Length::Units(800))
+            .align_self(Align::Center)
+            .spacing(20)
+            .push(title)
+            .push(input)
+            .push(tasks);
+
+        Scrollable::new(&mut self.scroll)
+            .padding(40)
+            .push(content)
+            .into()
+    }
+}
+
+#[derive(Debug)]
+struct Task {
+    description: String,
+    completed: bool,
+}
+
+impl Task {
+    fn new(description: String) -> Self {
+        Task {
+            description,
+            completed: false,
+        }
+    }
+
+    fn view(&mut self) -> Element<bool> {
+        Checkbox::new(self.completed, &self.description, |checked| checked)
+            .into()
+    }
+}
+
+// Colors
+const GRAY: Color = Color {
+    r: 0.5,
+    g: 0.5,
+    b: 0.5,
+    a: 1.0,
+};
diff --git a/examples/tour.rs b/examples/tour.rs
index f63b4cfe..c5daa2c5 100644
--- a/examples/tour.rs
+++ b/examples/tour.rs
@@ -1,7 +1,7 @@
 use iced::{
-    button, scrollable, slider, text::HorizontalAlignment, Align, Application,
-    Background, Button, Checkbox, Color, Column, Element, Image, Justify,
-    Length, Radio, Row, Scrollable, Slider, Text,
+    button, scrollable, slider, text::HorizontalAlignment, text_input, Align,
+    Application, Background, Button, Checkbox, Color, Column, Element, Image,
+    Justify, Length, Radio, Row, Scrollable, Slider, Text, TextInput,
 };
 
 pub fn main() {
@@ -101,7 +101,7 @@ impl Application for Tour {
     }
 }
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone)]
 pub enum Message {
     BackPressed,
     NextPressed,
@@ -139,6 +139,10 @@ impl Steps {
                     slider: slider::State::new(),
                 },
                 Step::Scrollable,
+                Step::TextInput {
+                    value: String::new(),
+                    state: text_input::State::new(),
+                },
                 Step::Debugger,
                 Step::End,
             ],
@@ -201,11 +205,15 @@ enum Step {
         slider: slider::State,
     },
     Scrollable,
+    TextInput {
+        value: String,
+        state: text_input::State,
+    },
     Debugger,
     End,
 }
 
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone)]
 pub enum StepMessage {
     SliderChanged(f32),
     LayoutChanged(Layout),
@@ -214,6 +222,7 @@ pub enum StepMessage {
     TextColorChanged(Color),
     LanguageSelected(Language),
     ImageWidthChanged(f32),
+    InputChanged(String),
     DebugToggled(bool),
 }
 
@@ -260,6 +269,11 @@ impl<'a> Step {
                     *width = new_width.round() as u16;
                 }
             }
+            StepMessage::InputChanged(new_value) => {
+                if let Step::TextInput { value, .. } = self {
+                    *value = new_value;
+                }
+            }
         };
     }
 
@@ -272,6 +286,7 @@ impl<'a> Step {
             Step::Image { .. } => true,
             Step::RowsAndColumns { .. } => true,
             Step::Scrollable => true,
+            Step::TextInput { value, .. } => !value.is_empty(),
             Step::Debugger => true,
             Step::End => false,
         }
@@ -297,6 +312,9 @@ impl<'a> Step {
                 Self::rows_and_columns(*layout, spacing_slider, *spacing).into()
             }
             Step::Scrollable => Self::scrollable().into(),
+            Step::TextInput { value, state } => {
+                Self::text_input(value, state).into()
+            }
             Step::Debugger => Self::debugger(debug).into(),
             Step::End => Self::end().into(),
         }
@@ -550,6 +568,38 @@ impl<'a> Step {
             )
     }
 
+    fn text_input(
+        value: &str,
+        state: &'a mut text_input::State,
+    ) -> Column<'a, StepMessage> {
+        Self::container("Text input")
+            .push(Text::new(
+                "Use a text input to ask for different kinds of information.",
+            ))
+            .push(
+                TextInput::new(
+                    state,
+                    "Type something to continue...",
+                    value,
+                    StepMessage::InputChanged,
+                )
+                .padding(10)
+                .size(30),
+            )
+            .push(Text::new(
+                "A text input produces a message every time it changes. It is \
+                 very easy to keep track of its contents:",
+            ))
+            .push(
+                Text::new(if value.is_empty() {
+                    "You have not typed anything yet..."
+                } else {
+                    value
+                })
+                .horizontal_alignment(HorizontalAlignment::Center),
+            )
+    }
+
     fn debugger(debug: bool) -> Column<'a, StepMessage> {
         Self::container("Debugger")
             .push(Text::new(
diff --git a/native/src/element.rs b/native/src/element.rs
index c638c713..be64a981 100644
--- a/native/src/element.rs
+++ b/native/src/element.rs
@@ -217,7 +217,7 @@ where
     /// ```
     pub fn map<F, B>(self, f: F) -> Element<'a, B, Renderer>
     where
-        Message: 'static + Copy,
+        Message: 'static + Clone,
         Renderer: 'a,
         B: 'static,
         F: 'static + Fn(Message) -> B,
@@ -286,7 +286,7 @@ impl<'a, A, B, Renderer> Map<'a, A, B, Renderer> {
 
 impl<'a, A, B, Renderer> Widget<B, Renderer> for Map<'a, A, B, Renderer>
 where
-    A: Copy,
+    A: Clone,
     Renderer: crate::Renderer,
 {
     fn node(&self, renderer: &Renderer) -> Node {
diff --git a/native/src/lib.rs b/native/src/lib.rs
index fa72a553..56399e57 100644
--- a/native/src/lib.rs
+++ b/native/src/lib.rs
@@ -211,10 +211,8 @@ mod node;
 mod style;
 mod user_interface;
 
-pub(crate) use iced_core::Vector;
-
 pub use iced_core::{
-    Align, Background, Color, Justify, Length, Point, Rectangle,
+    Align, Background, Color, Justify, Length, Point, Rectangle, Vector,
 };
 
 #[doc(no_inline)]
diff --git a/native/src/mouse_cursor.rs b/native/src/mouse_cursor.rs
index 291e57a6..a4740a27 100644
--- a/native/src/mouse_cursor.rs
+++ b/native/src/mouse_cursor.rs
@@ -18,4 +18,7 @@ pub enum MouseCursor {
 
     /// The cursor is grabbing a widget.
     Grabbing,
+
+    /// The cursor is over a text widget.
+    Text,
 }
diff --git a/native/src/widget.rs b/native/src/widget.rs
index c04f3377..01f5c92e 100644
--- a/native/src/widget.rs
+++ b/native/src/widget.rs
@@ -29,6 +29,7 @@ pub mod row;
 pub mod scrollable;
 pub mod slider;
 pub mod text;
+pub mod text_input;
 
 #[doc(no_inline)]
 pub use button::Button;
@@ -48,6 +49,8 @@ pub use scrollable::Scrollable;
 pub use slider::Slider;
 #[doc(no_inline)]
 pub use text::Text;
+#[doc(no_inline)]
+pub use text_input::TextInput;
 
 use crate::{Event, Hasher, Layout, Node, Point};
 
diff --git a/native/src/widget/button.rs b/native/src/widget/button.rs
index cf5dba93..31dd6fcc 100644
--- a/native/src/widget/button.rs
+++ b/native/src/widget/button.rs
@@ -19,7 +19,7 @@ impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Button<'a, Message, Renderer>
 where
     Renderer: self::Renderer,
-    Message: Copy + std::fmt::Debug,
+    Message: Clone + std::fmt::Debug,
 {
     fn node(&self, renderer: &Renderer) -> Node {
         renderer.node(&self)
@@ -38,7 +38,7 @@ where
                 button: mouse::Button::Left,
                 state,
             }) => {
-                if let Some(on_press) = self.on_press {
+                if let Some(on_press) = self.on_press.clone() {
                     let bounds = layout.bounds();
 
                     match state {
@@ -108,7 +108,7 @@ impl<'a, Message, Renderer> From<Button<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'static + self::Renderer,
-    Message: 'static + Copy + std::fmt::Debug,
+    Message: 'static + Clone + std::fmt::Debug,
 {
     fn from(
         button: Button<'a, Message, Renderer>,
diff --git a/native/src/widget/radio.rs b/native/src/widget/radio.rs
index 93ec4a36..626e6ffc 100644
--- a/native/src/widget/radio.rs
+++ b/native/src/widget/radio.rs
@@ -9,7 +9,7 @@ pub use iced_core::Radio;
 impl<Message, Renderer> Widget<Message, Renderer> for Radio<Message>
 where
     Renderer: self::Renderer,
-    Message: Copy + std::fmt::Debug,
+    Message: Clone + std::fmt::Debug,
 {
     fn node(&self, renderer: &Renderer) -> Node {
         renderer.node(&self)
@@ -29,7 +29,7 @@ where
                 state: ButtonState::Pressed,
             }) => {
                 if layout.bounds().contains(cursor_position) {
-                    messages.push(self.on_click);
+                    messages.push(self.on_click.clone());
                 }
             }
             _ => {}
@@ -85,7 +85,7 @@ impl<'a, Message, Renderer> From<Radio<Message>>
     for Element<'a, Message, Renderer>
 where
     Renderer: self::Renderer,
-    Message: 'static + Copy + std::fmt::Debug,
+    Message: 'static + Clone + std::fmt::Debug,
 {
     fn from(checkbox: Radio<Message>) -> Element<'a, Message, Renderer> {
         Element::new(checkbox)
diff --git a/native/src/widget/text_input.rs b/native/src/widget/text_input.rs
new file mode 100644
index 00000000..d9837b61
--- /dev/null
+++ b/native/src/widget/text_input.rs
@@ -0,0 +1,149 @@
+use crate::{
+    input::{keyboard, mouse, ButtonState},
+    Element, Event, Hasher, Layout, Length, Node, Point, Rectangle, Style,
+    Widget,
+};
+
+pub use iced_core::{text_input::State, TextInput};
+
+impl<'a, Message, Renderer> Widget<Message, Renderer> for TextInput<'a, Message>
+where
+    Renderer: self::Renderer,
+    Message: Clone + std::fmt::Debug,
+{
+    fn node(&self, renderer: &Renderer) -> Node {
+        let text_bounds =
+            Node::new(Style::default().width(Length::Fill).height(
+                Length::Units(self.size.unwrap_or(renderer.default_size())),
+            ));
+
+        Node::with_children(
+            Style::default()
+                .width(self.width)
+                .max_width(self.width)
+                .padding(self.padding),
+            vec![text_bounds],
+        )
+    }
+
+    fn on_event(
+        &mut self,
+        event: Event,
+        layout: Layout<'_>,
+        cursor_position: Point,
+        messages: &mut Vec<Message>,
+        _renderer: &Renderer,
+    ) {
+        match event {
+            Event::Mouse(mouse::Event::Input {
+                button: mouse::Button::Left,
+                state: ButtonState::Pressed,
+            }) => {
+                self.state.is_focused =
+                    layout.bounds().contains(cursor_position);
+            }
+            Event::Keyboard(keyboard::Event::CharacterReceived(c))
+                if self.state.is_focused && !c.is_control() =>
+            {
+                let cursor_position = self.state.cursor_position(&self.value);
+
+                self.value.insert(cursor_position, c);
+                self.state.move_cursor_right(&self.value);
+
+                let message = (self.on_change)(self.value.to_string());
+                messages.push(message);
+            }
+            Event::Keyboard(keyboard::Event::Input {
+                key_code,
+                state: ButtonState::Pressed,
+            }) if self.state.is_focused => match key_code {
+                keyboard::KeyCode::Enter => {
+                    if let Some(on_submit) = self.on_submit.clone() {
+                        messages.push(on_submit);
+                    }
+                }
+                keyboard::KeyCode::Backspace => {
+                    let cursor_position =
+                        self.state.cursor_position(&self.value);
+
+                    if cursor_position > 0 {
+                        self.state.move_cursor_left(&self.value);
+
+                        let _ = self.value.remove(cursor_position - 1);
+
+                        let message = (self.on_change)(self.value.to_string());
+                        messages.push(message);
+                    }
+                }
+                keyboard::KeyCode::Delete => {
+                    let cursor_position =
+                        self.state.cursor_position(&self.value);
+
+                    if cursor_position < self.value.len() {
+                        let _ = self.value.remove(cursor_position);
+
+                        let message = (self.on_change)(self.value.to_string());
+                        messages.push(message);
+                    }
+                }
+                keyboard::KeyCode::Left => {
+                    self.state.move_cursor_left(&self.value);
+                }
+                keyboard::KeyCode::Right => {
+                    self.state.move_cursor_right(&self.value);
+                }
+                _ => {}
+            },
+            _ => {}
+        }
+    }
+
+    fn draw(
+        &self,
+        renderer: &mut Renderer,
+        layout: Layout<'_>,
+        cursor_position: Point,
+    ) -> Renderer::Output {
+        let bounds = layout.bounds();
+        let text_bounds = layout.children().next().unwrap().bounds();
+
+        renderer.draw(&self, bounds, text_bounds, cursor_position)
+    }
+
+    fn hash_layout(&self, state: &mut Hasher) {
+        use std::any::TypeId;
+        use std::hash::Hash;
+
+        TypeId::of::<TextInput<'static, ()>>().hash(state);
+
+        self.width.hash(state);
+        self.max_width.hash(state);
+        self.padding.hash(state);
+        self.size.hash(state);
+    }
+}
+
+pub trait Renderer: crate::Renderer + Sized {
+    fn default_size(&self) -> u16;
+
+    fn draw<Message>(
+        &mut self,
+        text_input: &TextInput<'_, Message>,
+        bounds: Rectangle,
+        text_bounds: Rectangle,
+        cursor_position: Point,
+    ) -> Self::Output;
+}
+
+impl<'a, Message, Renderer> From<TextInput<'a, Message>>
+    for Element<'a, Message, Renderer>
+where
+    Renderer: 'static + self::Renderer,
+    Message: 'static + Clone + std::fmt::Debug,
+{
+    fn from(
+        text_input: TextInput<'a, Message>,
+    ) -> Element<'a, Message, Renderer> {
+        Element::new(text_input)
+    }
+}
diff --git a/src/winit.rs b/src/winit.rs
index b2200551..51ae1c1f 100644
--- a/src/winit.rs
+++ b/src/winit.rs
@@ -1,8 +1,9 @@
 pub use iced_wgpu::{Primitive, Renderer};
 
 pub use iced_winit::{
-    button, scrollable, slider, text, winit, Align, Background, Checkbox,
-    Color, Image, Justify, Length, Radio, Scrollable, Slider, Text,
+    button, scrollable, slider, text, text_input, winit, Align, Background,
+    Checkbox, Color, Image, Justify, Length, Radio, Scrollable, Slider, Text,
+    TextInput,
 };
 
 pub type Element<'a, Message> = iced_winit::Element<'a, Message, Renderer>;
diff --git a/wgpu/src/primitive.rs b/wgpu/src/primitive.rs
index 354b0851..8e40e3a6 100644
--- a/wgpu/src/primitive.rs
+++ b/wgpu/src/primitive.rs
@@ -1,4 +1,4 @@
-use iced_native::{text, Background, Color, Rectangle};
+use iced_native::{text, Background, Color, Rectangle, Vector};
 
 #[derive(Debug, Clone)]
 pub enum Primitive {
@@ -25,7 +25,7 @@ pub enum Primitive {
     },
     Clip {
         bounds: Rectangle,
-        offset: u32,
+        offset: Vector<u32>,
         content: Box<Primitive>,
     },
 }
diff --git a/wgpu/src/renderer.rs b/wgpu/src/renderer.rs
index a70693af..ca4cbb58 100644
--- a/wgpu/src/renderer.rs
+++ b/wgpu/src/renderer.rs
@@ -1,7 +1,7 @@
 use crate::{quad, Image, Primitive, Quad, Transformation};
 use iced_native::{
     renderer::Debugger, renderer::Windowed, Background, Color, Layout,
-    MouseCursor, Point, Rectangle, Widget,
+    MouseCursor, Point, Rectangle, Vector, Widget,
 };
 
 use raw_window_handle::HasRawWindowHandle;
@@ -23,6 +23,7 @@ mod row;
 mod scrollable;
 mod slider;
 mod text;
+mod text_input;
 
 pub struct Renderer {
     surface: Surface,
@@ -43,17 +44,17 @@ pub struct Target {
 
 pub struct Layer<'a> {
     bounds: Rectangle<u32>,
-    y_offset: u32,
+    offset: Vector<u32>,
     quads: Vec<Quad>,
     images: Vec<Image>,
     text: Vec<wgpu_glyph::Section<'a>>,
 }
 
 impl<'a> Layer<'a> {
-    pub fn new(bounds: Rectangle<u32>, y_offset: u32) -> Self {
+    pub fn new(bounds: Rectangle<u32>, offset: Vector<u32>) -> Self {
         Self {
             bounds,
-            y_offset,
+            offset,
             quads: Vec::new(),
             images: Vec::new(),
             text: Vec::new(),
@@ -148,18 +149,18 @@ impl Renderer {
         });
 
         let mut layers = Vec::new();
-        let mut current = Layer::new(
+
+        layers.push(Layer::new(
             Rectangle {
                 x: 0,
                 y: 0,
                 width: u32::from(target.width),
                 height: u32::from(target.height),
             },
-            0,
-        );
+            Vector::new(0, 0),
+        ));
 
-        self.draw_primitive(primitive, &mut current, &mut layers);
-        layers.push(current);
+        self.draw_primitive(primitive, &mut layers);
 
         for layer in layers {
             self.flush(
@@ -178,15 +179,16 @@ impl Renderer {
     fn draw_primitive<'a>(
         &mut self,
         primitive: &'a Primitive,
-        layer: &mut Layer<'a>,
         layers: &mut Vec<Layer<'a>>,
     ) {
+        let layer = layers.last_mut().unwrap();
+
         match primitive {
             Primitive::None => {}
             Primitive::Group { primitives } => {
                 // TODO: Inspect a bit and regroup (?)
                 for primitive in primitives {
-                    self.draw_primitive(primitive, layer, layers)
+                    self.draw_primitive(primitive, layers)
                 }
             }
             Primitive::Text {
@@ -255,7 +257,10 @@ impl Renderer {
                 border_radius,
             } => {
                 layer.quads.push(Quad {
-                    position: [bounds.x, bounds.y - layer.y_offset as f32],
+                    position: [
+                        bounds.x - layer.offset.x as f32,
+                        bounds.y - layer.offset.y as f32,
+                    ],
                     scale: [bounds.width, bounds.height],
                     color: match background {
                         Background::Color(color) => color.into_linear(),
@@ -275,18 +280,22 @@ impl Renderer {
                 offset,
                 content,
             } => {
-                let mut new_layer = Layer::new(
+                let clip_layer = Layer::new(
                     Rectangle {
-                        x: bounds.x as u32,
-                        y: bounds.y as u32 - layer.y_offset,
+                        x: bounds.x as u32 - layer.offset.x,
+                        y: bounds.y as u32 - layer.offset.y,
                         width: bounds.width as u32,
                         height: bounds.height as u32,
                     },
-                    layer.y_offset + offset,
+                    layer.offset + *offset,
                 );
 
+                let new_layer = Layer::new(layer.bounds, layer.offset);
+
+                layers.push(clip_layer);
+
                 // TODO: Primitive culling
-                self.draw_primitive(content, &mut new_layer, layers);
+                self.draw_primitive(content, layers);
 
                 layers.push(new_layer);
             }
@@ -301,7 +310,10 @@ impl Renderer {
         target: &wgpu::TextureView,
     ) {
         let translated = transformation
-            * Transformation::translate(0.0, -(layer.y_offset as f32));
+            * Transformation::translate(
+                -(layer.offset.x as f32),
+                -(layer.offset.y as f32),
+            );
 
         if layer.quads.len() > 0 {
             self.quad_pipeline.draw(
diff --git a/wgpu/src/renderer/checkbox.rs b/wgpu/src/renderer/checkbox.rs
index fd3f08b1..ea7a4c0b 100644
--- a/wgpu/src/renderer/checkbox.rs
+++ b/wgpu/src/renderer/checkbox.rs
@@ -10,6 +10,7 @@ const SIZE: f32 = 28.0;
 impl checkbox::Renderer for Renderer {
     fn node<Message>(&self, checkbox: &Checkbox<Message>) -> Node {
         Row::<(), Self>::new()
+            .width(Length::Fill)
             .spacing(15)
             .align_items(Align::Center)
             .push(
diff --git a/wgpu/src/renderer/scrollable.rs b/wgpu/src/renderer/scrollable.rs
index e812a7e1..360759a5 100644
--- a/wgpu/src/renderer/scrollable.rs
+++ b/wgpu/src/renderer/scrollable.rs
@@ -1,7 +1,7 @@
 use crate::{Primitive, Renderer};
 use iced_native::{
     scrollable, Background, Color, Layout, MouseCursor, Point, Rectangle,
-    Scrollable, Widget,
+    Scrollable, Vector, Widget,
 };
 
 const SCROLLBAR_WIDTH: u16 = 10;
@@ -56,9 +56,9 @@ impl scrollable::Renderer for Renderer {
         let (content, mouse_cursor) =
             scrollable.content.draw(self, content, cursor_position);
 
-        let primitive = Primitive::Clip {
+        let clip = Primitive::Clip {
             bounds,
-            offset,
+            offset: Vector::new(0, offset),
             content: Box::new(content),
         };
 
@@ -107,19 +107,15 @@ impl scrollable::Renderer for Renderer {
                     };
 
                     Primitive::Group {
-                        primitives: vec![
-                            primitive,
-                            scrollbar_background,
-                            scrollbar,
-                        ],
+                        primitives: vec![clip, scrollbar_background, scrollbar],
                     }
                 } else {
                     Primitive::Group {
-                        primitives: vec![primitive, scrollbar],
+                        primitives: vec![clip, scrollbar],
                     }
                 }
             } else {
-                primitive
+                clip
             },
             if is_mouse_over_scrollbar
                 || scrollable.state.is_scrollbar_grabbed()
diff --git a/wgpu/src/renderer/text.rs b/wgpu/src/renderer/text.rs
index 8fbade4e..82f75f09 100644
--- a/wgpu/src/renderer/text.rs
+++ b/wgpu/src/renderer/text.rs
@@ -47,7 +47,7 @@ impl text::Renderer for Renderer {
                 let (width, height) = if let Some(bounds) =
                     glyph_brush.borrow_mut().glyph_bounds(&text)
                 {
-                    (bounds.width(), bounds.height())
+                    (bounds.width().ceil(), bounds.height().ceil())
                 } else {
                     (0.0, 0.0)
                 };
diff --git a/wgpu/src/renderer/text_input.rs b/wgpu/src/renderer/text_input.rs
new file mode 100644
index 00000000..cff8bf23
--- /dev/null
+++ b/wgpu/src/renderer/text_input.rs
@@ -0,0 +1,171 @@
+use crate::{Primitive, Renderer};
+
+use iced_native::{
+    text::HorizontalAlignment, text::VerticalAlignment, text_input, Background,
+    Color, MouseCursor, Point, Rectangle, TextInput, Vector,
+};
+use std::f32;
+
+impl text_input::Renderer for Renderer {
+    fn default_size(&self) -> u16 {
+        // TODO: Make this configurable
+        20
+    }
+
+    fn draw<Message>(
+        &mut self,
+        text_input: &TextInput<Message>,
+        bounds: Rectangle,
+        text_bounds: Rectangle,
+        cursor_position: Point,
+    ) -> Self::Output {
+        let is_mouse_over = bounds.contains(cursor_position);
+
+        let border = Primitive::Quad {
+            bounds,
+            background: Background::Color(
+                if is_mouse_over || text_input.state.is_focused {
+                    Color {
+                        r: 0.5,
+                        g: 0.5,
+                        b: 0.5,
+                        a: 1.0,
+                    }
+                } else {
+                    Color {
+                        r: 0.7,
+                        g: 0.7,
+                        b: 0.7,
+                        a: 1.0,
+                    }
+                },
+            ),
+            border_radius: 5,
+        };
+
+        let input = Primitive::Quad {
+            bounds: Rectangle {
+                x: bounds.x + 1.0,
+                y: bounds.y + 1.0,
+                width: bounds.width - 2.0,
+                height: bounds.height - 2.0,
+            },
+            background: Background::Color(Color::WHITE),
+            border_radius: 5,
+        };
+
+        let size = f32::from(text_input.size.unwrap_or(self.default_size()));
+        let text = text_input.value.to_string();
+
+        let value = Primitive::Text {
+            content: if text.is_empty() {
+                text_input.placeholder.clone()
+            } else {
+                text.clone()
+            },
+            color: if text.is_empty() {
+                Color {
+                    r: 0.7,
+                    g: 0.7,
+                    b: 0.7,
+                    a: 1.0,
+                }
+            } else {
+                Color {
+                    r: 0.3,
+                    g: 0.3,
+                    b: 0.3,
+                    a: 1.0,
+                }
+            },
+            bounds: Rectangle {
+                width: f32::INFINITY,
+                ..text_bounds
+            },
+            size,
+            horizontal_alignment: HorizontalAlignment::Left,
+            vertical_alignment: VerticalAlignment::Center,
+        };
+
+        let (contents_primitive, offset) = if text_input.state.is_focused {
+            use wgpu_glyph::{GlyphCruncher, Scale, Section};
+
+            let text_before_cursor = &text_input
+                .value
+                .until(text_input.state.cursor_position(&text_input.value))
+                .to_string();
+
+            let mut text_value_width = self
+                .glyph_brush
+                .borrow_mut()
+                .glyph_bounds(Section {
+                    text: text_before_cursor,
+                    bounds: (f32::INFINITY, text_bounds.height),
+                    scale: Scale { x: size, y: size },
+                    ..Default::default()
+                })
+                .map(|bounds| bounds.width().round())
+                .unwrap_or(0.0);
+
+            let spaces_at_the_end =
+                text_before_cursor.len() - text_before_cursor.trim_end().len();
+
+            if spaces_at_the_end > 0 {
+                let space_width = {
+                    let glyph_brush = self.glyph_brush.borrow();
+
+                    // TODO: Select appropriate font
+                    let font = &glyph_brush.fonts()[0];
+
+                    font.glyph(' ')
+                        .scaled(Scale { x: size, y: size })
+                        .h_metrics()
+                        .advance_width
+                };
+
+                text_value_width += spaces_at_the_end as f32 * space_width;
+            }
+
+            let cursor = 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(Color::BLACK),
+                border_radius: 0,
+            };
+
+            (
+                Primitive::Group {
+                    primitives: vec![value, cursor],
+                },
+                Vector::new(
+                    ((text_value_width + 5.0) - text_bounds.width).max(0.0)
+                        as u32,
+                    0,
+                ),
+            )
+        } else {
+            (value, Vector::new(0, 0))
+        };
+
+        let contents = Primitive::Clip {
+            bounds: text_bounds,
+            offset,
+            content: Box::new(contents_primitive),
+        };
+
+        (
+            Primitive::Group {
+                primitives: vec![border, input, contents],
+            },
+            if is_mouse_over {
+                MouseCursor::Text
+            } else {
+                MouseCursor::OutOfBounds
+            },
+        )
+    }
+}
diff --git a/winit/src/application.rs b/winit/src/application.rs
index c8748199..b90b5eef 100644
--- a/winit/src/application.rs
+++ b/winit/src/application.rs
@@ -1,6 +1,8 @@
 use crate::{
-    column, conversion, input::mouse, renderer::Windowed, Cache, Column,
-    Element, Event, Length, MouseCursor, UserInterface,
+    column, conversion,
+    input::{keyboard, mouse},
+    renderer::Windowed,
+    Cache, Column, Element, Event, Length, MouseCursor, UserInterface,
 };
 
 pub trait Application {
@@ -167,6 +169,25 @@ pub trait Application {
                         ));
                     }
                 },
+                WindowEvent::ReceivedCharacter(c) => {
+                    events.push(Event::Keyboard(
+                        keyboard::Event::CharacterReceived(c),
+                    ));
+                }
+                WindowEvent::KeyboardInput {
+                    input:
+                        winit::event::KeyboardInput {
+                            virtual_keycode: Some(virtual_keycode),
+                            state,
+                            ..
+                        },
+                    ..
+                } => {
+                    events.push(Event::Keyboard(keyboard::Event::Input {
+                        key_code: conversion::key_code(virtual_keycode),
+                        state: conversion::button_state(state),
+                    }));
+                }
                 WindowEvent::CloseRequested => {
                     *control_flow = ControlFlow::Exit;
                 }
diff --git a/winit/src/conversion.rs b/winit/src/conversion.rs
index bb0d252e..e73fa008 100644
--- a/winit/src/conversion.rs
+++ b/winit/src/conversion.rs
@@ -9,6 +9,7 @@ pub fn mouse_cursor(mouse_cursor: MouseCursor) -> winit::window::CursorIcon {
         MouseCursor::Working => winit::window::CursorIcon::Progress,
         MouseCursor::Grab => winit::window::CursorIcon::Grab,
         MouseCursor::Grabbing => winit::window::CursorIcon::Grabbing,
+        MouseCursor::Text => winit::window::CursorIcon::Text,
     }
 }