From a97401aed2a173260a4abfdb65a77975ce6c0f01 Mon Sep 17 00:00:00 2001
From: Héctor Ramón Jiménez <hector0193@gmail.com>
Date: Sat, 14 Sep 2019 19:16:06 +0200
Subject: Rethink workspace structure

---
 src/widget/image.rs | 178 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 178 insertions(+)
 create mode 100644 src/widget/image.rs

(limited to 'src/widget/image.rs')

diff --git a/src/widget/image.rs b/src/widget/image.rs
new file mode 100644
index 00000000..d94bfea5
--- /dev/null
+++ b/src/widget/image.rs
@@ -0,0 +1,178 @@
+//! Display images in your user interface.
+
+use crate::{
+    Align, Element, Hasher, Layout, MouseCursor, Node, Point, Rectangle, Style,
+    Widget,
+};
+
+use std::hash::Hash;
+
+/// A frame that displays an image while keeping aspect ratio.
+///
+/// It implements [`Widget`] when the associated `Renderer` implements the
+/// [`image::Renderer`] trait.
+///
+/// [`Widget`]: ../../core/trait.Widget.html
+/// [`image::Renderer`]: trait.Renderer.html
+///
+/// # Example
+///
+/// ```
+/// use iced::Image;
+///
+/// # let my_handle = String::from("some_handle");
+/// let image = Image::new(my_handle);
+/// ```
+pub struct Image<I> {
+    image: I,
+    source: Option<Rectangle<u16>>,
+    width: Option<u16>,
+    height: Option<u16>,
+    style: Style,
+}
+
+impl<I> std::fmt::Debug for Image<I> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("Image")
+            .field("source", &self.source)
+            .field("width", &self.width)
+            .field("height", &self.height)
+            .field("style", &self.style)
+            .finish()
+    }
+}
+
+impl<I> Image<I> {
+    /// Creates a new [`Image`] with given image handle.
+    ///
+    /// [`Image`]: struct.Image.html
+    pub fn new(image: I) -> Self {
+        Image {
+            image,
+            source: None,
+            width: None,
+            height: None,
+            style: Style::default(),
+        }
+    }
+
+    /// Sets the portion of the [`Image`] to draw.
+    ///
+    /// [`Image`]: struct.Image.html
+    pub fn clip(mut self, source: Rectangle<u16>) -> Self {
+        self.source = Some(source);
+        self
+    }
+
+    /// Sets the width of the [`Image`] boundaries in pixels.
+    ///
+    /// [`Image`]: struct.Image.html
+    pub fn width(mut self, width: u16) -> Self {
+        self.width = Some(width);
+        self
+    }
+
+    /// Sets the height of the [`Image`] boundaries in pixels.
+    ///
+    /// [`Image`]: struct.Image.html
+    pub fn height(mut self, height: u16) -> Self {
+        self.height = Some(height);
+        self
+    }
+
+    /// Sets the alignment of the [`Image`] itself.
+    ///
+    /// This is useful if you want to override the default alignment given by
+    /// the parent container.
+    ///
+    /// [`Image`]: struct.Image.html
+    pub fn align_self(mut self, align: Align) -> Self {
+        self.style = self.style.align_self(align);
+        self
+    }
+}
+
+impl<I, Message, Renderer> Widget<Message, Renderer> for Image<I>
+where
+    Renderer: self::Renderer<I>,
+    I: Clone,
+{
+    fn node(&self, renderer: &Renderer) -> Node {
+        renderer.node(
+            self.style,
+            &self.image,
+            self.width,
+            self.height,
+            self.source,
+        )
+    }
+
+    fn draw(
+        &self,
+        renderer: &mut Renderer,
+        layout: Layout<'_>,
+        _cursor_position: Point,
+    ) -> MouseCursor {
+        renderer.draw(&self.image, layout.bounds(), self.source);
+
+        MouseCursor::OutOfBounds
+    }
+
+    fn hash_layout(&self, state: &mut Hasher) {
+        self.style.hash(state);
+        self.width.hash(state);
+        self.height.hash(state);
+    }
+}
+
+/// The renderer of an [`Image`].
+///
+/// Your [renderer] will need to implement this trait before being able to use
+/// an [`Image`] in your user interface.
+///
+/// [`Image`]: struct.Image.html
+/// [renderer]: ../../renderer/index.html
+pub trait Renderer<I> {
+    /// Creates a [`Node`] with the given [`Style`] for the provided [`Image`]
+    /// and its size.
+    ///
+    /// You should probably keep the original aspect ratio, if possible.
+    ///
+    /// [`Node`]: ../../struct.Node.html
+    /// [`Style`]: ../../struct.Style.html
+    /// [`Image`]: struct.Image.html
+    fn node(
+        &self,
+        style: Style,
+        image: &I,
+        width: Option<u16>,
+        height: Option<u16>,
+        source: Option<Rectangle<u16>>,
+    ) -> Node;
+
+    /// Draws an [`Image`].
+    ///
+    /// It receives:
+    ///   * the bounds of the [`Image`]
+    ///   * the handle of the loaded [`Image`]
+    ///   * the portion of the image to draw. If not specified, the entire image
+    ///     should be drawn.
+    ///
+    /// [`Image`]: struct.Image.html
+    fn draw(
+        &mut self,
+        image: &I,
+        bounds: Rectangle<f32>,
+        source: Option<Rectangle<u16>>,
+    );
+}
+
+impl<'a, I, Message, Renderer> From<Image<I>> for Element<'a, Message, Renderer>
+where
+    Renderer: self::Renderer<I>,
+    I: Clone + 'a,
+{
+    fn from(image: Image<I>) -> Element<'a, Message, Renderer> {
+        Element::new(image)
+    }
+}
-- 
cgit