Merge pull request #141 from Songtronix/songtronix/progressbar-widget

Progress bar widget

11 files changed, 308 insertions, 6 deletions

diff --git a/core/src/background.rs b/core/src/background.rs
index 2f75e45c..e1a37ddc 100644
--- a/core/src/background.rs
+++ b/core/src/background.rs
@@ -12,4 +12,4 @@ impl From<Color> for Background {
     fn from(color: Color) -> Self {
         Background::Color(color)
     }
-}
\ No newline at end of file
+}
diff --git a/examples/progress_bar.rs b/examples/progress_bar.rs
new file mode 100644
index 00000000..525019b4
--- /dev/null
+++ b/examples/progress_bar.rs
@@ -0,0 +1,63 @@
+use iced::{
+    settings::Window, slider, Background, Color, Column, Element, Length,
+    ProgressBar, Sandbox, Settings, Slider,
+};
+
+pub fn main() {
+    Progress::run(Settings {
+        window: Window {
+            size: (700, 300),
+            resizable: true,
+            decorations: true,
+        },
+    })
+}
+
+#[derive(Default)]
+struct Progress {
+    value: f32,
+    progress_bar_slider: slider::State,
+}
+
+#[derive(Debug, Clone, Copy)]
+enum Message {
+    SliderChanged(f32),
+}
+
+impl Sandbox for Progress {
+    type Message = Message;
+
+    fn new() -> Self {
+        Self::default()
+    }
+
+    fn title(&self) -> String {
+        String::from("A simple Progressbar")
+    }
+
+    fn update(&mut self, message: Message) {
+        match message {
+            Message::SliderChanged(x) => self.value = x,
+        }
+    }
+
+    fn view(&mut self) -> Element<Message> {
+        Column::new()
+            .padding(20)
+            .push(
+                ProgressBar::new(0.0..=100.0, self.value)
+                    .background(Background::Color(Color::from_rgb(
+                        0.6, 0.6, 0.6,
+                    )))
+                    .active_color(Color::from_rgb(0.0, 0.95, 0.0))
+                    .height(Length::Units(30)),
+            )
+            .push(Slider::new(
+                &mut self.progress_bar_slider,
+                0.0..=100.0,
+                self.value,
+                Message::SliderChanged,
+            ))
+            .into()
+    }
+}
diff --git a/native/src/widget.rs b/native/src/widget.rs
index dcc99645..ccc9b47e 100644
--- a/native/src/widget.rs
+++ b/native/src/widget.rs
@@ -25,6 +25,7 @@ pub mod checkbox;
 pub mod column;
 pub mod container;
 pub mod image;
+pub mod progress_bar;
 pub mod radio;
 pub mod row;
 pub mod scrollable;
@@ -45,6 +46,8 @@ pub use container::Container;
 #[doc(no_inline)]
 pub use image::Image;
 #[doc(no_inline)]
+pub use progress_bar::ProgressBar;
+#[doc(no_inline)]
 pub use radio::Radio;
 #[doc(no_inline)]
 pub use row::Row;
diff --git a/native/src/widget/progress_bar.rs b/native/src/widget/progress_bar.rs
new file mode 100644
index 00000000..b1d4fd92
--- /dev/null
+++ b/native/src/widget/progress_bar.rs
@@ -0,0 +1,173 @@
+//! Provide progress feedback to your users.
+use crate::{
+    layout, Background, Color, Element, Hasher, Layout, Length, Point,
+    Rectangle, Size, Widget,
+};
+
+use std::{hash::Hash, ops::RangeInclusive};
+
+/// A bar that displays progress.
+///
+/// # Example
+/// ```
+/// # use iced_native::ProgressBar;
+/// #
+/// let value = 50.0;
+///
+/// ProgressBar::new(0.0..=100.0, value);
+/// ```
+///
+/// ![Progress bar drawn with `iced_wgpu`](https://user-images.githubusercontent.com/18618951/71662391-a316c200-2d51-11ea-9cef-52758cab85e3.png)
+#[allow(missing_debug_implementations)]
+pub struct ProgressBar {
+    range: RangeInclusive<f32>,
+    value: f32,
+    width: Length,
+    height: Option<Length>,
+    background: Option<Background>,
+    active_color: Option<Color>,
+}
+
+impl ProgressBar {
+    /// Creates a new [`ProgressBar`].
+    ///
+    /// It expects:
+    ///   * an inclusive range of possible values
+    ///   * the current value of the [`ProgressBar`]
+    ///
+    /// [`ProgressBar`]: struct.ProgressBar.html
+    pub fn new(range: RangeInclusive<f32>, value: f32) -> Self {
+        ProgressBar {
+            value: value.max(*range.start()).min(*range.end()),
+            range,
+            width: Length::Fill,
+            height: None,
+            background: None,
+            active_color: None,
+        }
+    }
+
+    /// Sets the width of the [`ProgressBar`].
+    ///
+    /// [`ProgressBar`]: struct.ProgressBar.html
+    pub fn width(mut self, width: Length) -> Self {
+        self.width = width;
+        self
+    }
+
+    /// Sets the height of the [`ProgressBar`].
+    ///
+    /// [`ProgressBar`]: struct.ProgressBar.html
+    pub fn height(mut self, height: Length) -> Self {
+        self.height = Some(height);
+        self
+    }
+
+    /// Sets the background of the [`ProgressBar`].
+    ///
+    /// [`ProgressBar`]: struct.ProgressBar.html
+    pub fn background(mut self, background: Background) -> Self {
+        self.background = Some(background);
+        self
+    }
+
+    /// Sets the active color of the [`ProgressBar`].
+    ///
+    /// [`ProgressBar`]: struct.ProgressBar.html
+    pub fn active_color(mut self, active_color: Color) -> Self {
+        self.active_color = Some(active_color);
+        self
+    }
+}
+
+impl<Message, Renderer> Widget<Message, Renderer> for ProgressBar
+where
+    Renderer: self::Renderer,
+{
+    fn width(&self) -> Length {
+        self.width
+    }
+
+    fn height(&self) -> Length {
+        self.height
+            .unwrap_or(Length::Units(Renderer::DEFAULT_HEIGHT))
+    }
+
+    fn layout(
+        &self,
+        _renderer: &Renderer,
+        limits: &layout::Limits,
+    ) -> layout::Node {
+        let limits = limits.width(self.width).height(
+            self.height
+                .unwrap_or(Length::Units(Renderer::DEFAULT_HEIGHT)),
+        );
+
+        let size = limits.resolve(Size::ZERO);
+
+        layout::Node::new(size)
+    }
+
+    fn draw(
+        &self,
+        renderer: &mut Renderer,
+        layout: Layout<'_>,
+        _cursor_position: Point,
+    ) -> Renderer::Output {
+        renderer.draw(
+            layout.bounds(),
+            self.range.clone(),
+            self.value,
+            self.background,
+            self.active_color,
+        )
+    }
+
+    fn hash_layout(&self, state: &mut Hasher) {
+        self.width.hash(state);
+        self.height.hash(state);
+    }
+}
+
+/// The renderer of a [`ProgressBar`].
+///
+/// Your [renderer] will need to implement this trait before being
+/// able to use a [`ProgressBar`] in your user interface.
+///
+/// [`ProgressBar`]: struct.ProgressBar.html
+/// [renderer]: ../../renderer/index.html
+pub trait Renderer: crate::Renderer {
+    /// The default height of a [`ProgressBar`].
+    ///
+    /// [`ProgressBar`]: struct.ProgressBar.html
+    const DEFAULT_HEIGHT: u16;
+
+    /// Draws a [`ProgressBar`].
+    ///
+    /// It receives:
+    ///   * the bounds of the [`ProgressBar`]
+    ///   * the range of values of the [`ProgressBar`]
+    ///   * the current value of the [`ProgressBar`]
+    ///   * maybe a specific background of the [`ProgressBar`]
+    ///   * maybe a specific active color of the [`ProgressBar`]
+    ///
+    /// [`ProgressBar`]: struct.ProgressBar.html
+    fn draw(
+        &self,
+        bounds: Rectangle,
+        range: RangeInclusive<f32>,
+        value: f32,
+        background: Option<Background>,
+        active_color: Option<Color>,
+    ) -> Self::Output;
+}
+
+impl<'a, Message, Renderer> From<ProgressBar> for Element<'a, Message, Renderer>
+where
+    Renderer: self::Renderer,
+    Message: 'static,
+{
+    fn from(progress_bar: ProgressBar) -> Element<'a, Message, Renderer> {
+        Element::new(progress_bar)
+    }
+}
diff --git a/native/src/widget/text_input.rs b/native/src/widget/text_input.rs
index 1d1c32a2..c994b7ba 100644
--- a/native/src/widget/text_input.rs
+++ b/native/src/widget/text_input.rs
@@ -633,7 +633,8 @@ impl Value {
             .unwrap_or(self.len())
     }
 
-    /// Returns a new [`Value`] containing the graphemes until the given `index`.
+    /// Returns a new [`Value`] containing the graphemes until the given
+    /// `index`.
     ///
     /// [`Value`]: struct.Value.html
     pub fn until(&self, index: usize) -> Self {
diff --git a/src/native.rs b/src/native.rs
index cf48a391..022cf337 100644
--- a/src/native.rs
+++ b/src/native.rs
@@ -85,7 +85,7 @@ pub mod widget {
         pub use iced_winit::svg::{Handle, Svg};
     }
 
-    pub use iced_winit::{Checkbox, Radio, Text};
+    pub use iced_winit::{Checkbox, ProgressBar, Radio, Text};
 
     #[doc(no_inline)]
     pub use {
diff --git a/web/src/widget/text_input.rs b/web/src/widget/text_input.rs
index 99792c84..eedc25bc 100644
--- a/web/src/widget/text_input.rs
+++ b/web/src/widget/text_input.rs
@@ -32,6 +32,7 @@ pub struct TextInput<'a, Message> {
     _state: &'a mut State,
     placeholder: String,
     value: String,
+    is_secure: bool,
     width: Length,
     max_width: Length,
     padding: u16,
@@ -64,6 +65,7 @@ impl<'a, Message> TextInput<'a, Message> {
             _state: state,
             placeholder: String::from(placeholder),
             value: String::from(value),
+            is_secure: false,
             width: Length::Fill,
             max_width: Length::Shrink,
             padding: 0,
@@ -73,6 +75,14 @@ impl<'a, Message> TextInput<'a, Message> {
         }
     }
 
+    /// Converts the [`TextInput`] into a secure password input.
+    ///
+    /// [`TextInput`]: struct.TextInput.html
+    pub fn password(mut self) -> Self {
+        self.is_secure = true;
+        self
+    }
+    
     /// Sets the width of the [`TextInput`].
     ///
     /// [`TextInput`]: struct.TextInput.html
@@ -161,6 +171,10 @@ where
                 "value",
                 bumpalo::format!(in bump, "{}", self.value).into_bump_str(),
             )
+            .attr(
+                "type",
+                bumpalo::format!(in bump, "{}", if self.is_secure { "password" } else { "text" }).into_bump_str(),
+            )
             .on("input", move |root, vdom, event| {
                 let text_input = match event.target().and_then(|t| {
                     t.dyn_into::<web_sys::HtmlInputElement>().ok()
diff --git a/wgpu/src/renderer/widget.rs b/wgpu/src/renderer/widget.rs
index f82631d5..32187c10 100644
--- a/wgpu/src/renderer/widget.rs
+++ b/wgpu/src/renderer/widget.rs
@@ -2,6 +2,7 @@ mod button;
 mod checkbox;
 mod column;
 mod image;
+mod progress_bar;
 mod radio;
 mod row;
 mod scrollable;
diff --git a/wgpu/src/renderer/widget/progress_bar.rs b/wgpu/src/renderer/widget/progress_bar.rs
new file mode 100644
index 00000000..8ed4bab7
--- /dev/null
+++ b/wgpu/src/renderer/widget/progress_bar.rs
@@ -0,0 +1,47 @@
+use crate::{Primitive, Renderer};
+use iced_native::{progress_bar, Background, Color, MouseCursor, Rectangle};
+
+impl progress_bar::Renderer for Renderer {
+    const DEFAULT_HEIGHT: u16 = 30;
+
+    fn draw(
+        &self,
+        bounds: Rectangle,
+        range: std::ops::RangeInclusive<f32>,
+        value: f32,
+        background: Option<Background>,
+        active_color: Option<Color>,
+    ) -> Self::Output {
+        let (range_start, range_end) = range.into_inner();
+        let active_progress_width = bounds.width
+            * ((value - range_start) / (range_end - range_start).max(1.0));
+
+        let background = Primitive::Group {
+            primitives: vec![Primitive::Quad {
+                bounds: Rectangle { ..bounds },
+                background: background
+                    .unwrap_or(Background::Color([0.6, 0.6, 0.6].into()))
+                    .into(),
+                border_radius: 5,
+            }],
+        };
+
+        let active_progress = Primitive::Quad {
+            bounds: Rectangle {
+                width: active_progress_width,
+                ..bounds
+            },
+            background: Background::Color(
+                active_color.unwrap_or([0.0, 0.95, 0.0].into()),
+            ),
+            border_radius: 5,
+        };
+
+        (
+            Primitive::Group {
+                primitives: vec![background, active_progress],
+            },
+            MouseCursor::OutOfBounds,
+        )
+    }
+}
diff --git a/winit/src/conversion.rs b/winit/src/conversion.rs
index 0537d853..279b975a 100644
--- a/winit/src/conversion.rs
+++ b/winit/src/conversion.rs
@@ -50,7 +50,8 @@ pub fn button_state(element_state: winit::event::ElementState) -> ButtonState {
     }
 }
 
-/// Convert some `ModifiersState` from [`winit`] to an [`iced_native`] modifiers state.
+/// Convert some `ModifiersState` from [`winit`] to an [`iced_native`] modifiers
+/// state.
 ///
 /// [`winit`]: https://github.com/rust-windowing/winit
 /// [`iced_native`]: https://github.com/hecrj/iced/tree/master/native
diff --git a/winit/src/debug/basic.rs b/winit/src/debug/basic.rs
index c9da392c..d46edba6 100644
--- a/winit/src/debug/basic.rs
+++ b/winit/src/debug/basic.rs
@@ -1,5 +1,4 @@
-use std::collections::VecDeque;
-use std::time;
+use std::{collections::VecDeque, time};
 
 #[derive(Debug)]
 pub struct Debug {