73 lines
1.8 KiB
Rust
73 lines
1.8 KiB
Rust
//! Display images in your user interface.
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use crate::{layout, Element, Hasher, Layout, Length, Point, Widget};
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use std::hash::Hash;
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pub use iced_core::Image;
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impl<Message, Renderer> Widget<Message, Renderer> for Image
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where
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Renderer: self::Renderer,
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{
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fn width(&self) -> Length {
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self.width
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}
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fn height(&self) -> Length {
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self.height
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}
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fn layout(
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&self,
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renderer: &Renderer,
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limits: &layout::Limits,
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) -> layout::Node {
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renderer.layout(&self, limits)
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}
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fn draw(
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&self,
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renderer: &mut Renderer,
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layout: Layout<'_>,
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_cursor_position: Point,
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) -> Renderer::Output {
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renderer.draw(&self, layout)
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}
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fn hash_layout(&self, state: &mut Hasher) {
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self.width.hash(state);
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self.height.hash(state);
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}
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}
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/// The renderer of an [`Image`].
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///
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/// Your [renderer] will need to implement this trait before being able to use
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/// an [`Image`] in your user interface.
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///
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/// [`Image`]: struct.Image.html
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/// [renderer]: ../../renderer/index.html
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pub trait Renderer: crate::Renderer {
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/// Creates a [`Node`] for the provided [`Image`].
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///
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/// You should probably keep the original aspect ratio, if possible.
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///
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/// [`Node`]: ../../struct.Node.html
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/// [`Image`]: struct.Image.html
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fn layout(&self, image: &Image, limits: &layout::Limits) -> layout::Node;
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/// Draws an [`Image`].
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///
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/// [`Image`]: struct.Image.html
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fn draw(&mut self, image: &Image, layout: Layout<'_>) -> Self::Output;
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}
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impl<'a, Message, Renderer> From<Image> for Element<'a, Message, Renderer>
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where
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Renderer: self::Renderer,
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{
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fn from(image: Image) -> Element<'a, Message, Renderer> {
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Element::new(image)
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}
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}
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