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//! Write some text for your users to read.
use crate::{layout, Element, Hasher, Layout, Length, Point, Widget};
use std::hash::Hash;
pub use iced_core::text::*;
impl<Message, Renderer> Widget<Message, Renderer> for Text
where
Renderer: self::Renderer,
{
fn width(&self) -> Length {
self.width
}
fn layout(
&self,
renderer: &Renderer,
limits: &layout::Limits,
) -> layout::Node {
renderer.layout(&self, limits)
}
fn draw(
&self,
renderer: &mut Renderer,
layout: Layout<'_>,
_cursor_position: Point,
) -> Renderer::Output {
renderer.draw(&self, layout)
}
fn hash_layout(&self, state: &mut Hasher) {
self.content.hash(state);
self.size.hash(state);
self.width.hash(state);
self.height.hash(state);
}
}
/// The renderer of a [`Text`] fragment.
///
/// Your [renderer] will need to implement this trait before being
/// able to use [`Text`] in your [`UserInterface`].
///
/// [`Text`]: struct.Text.html
/// [renderer]: ../../renderer/index.html
/// [`UserInterface`]: ../../struct.UserInterface.html
pub trait Renderer: crate::Renderer {
/// Creates a [`Node`] with the given [`Style`] for the provided [`Text`]
/// contents and size.
///
/// You should probably use [`Node::with_measure`] to allow [`Text`] to
/// adapt to the dimensions of its container.
///
/// [`Node`]: ../../struct.Node.html
/// [`Style`]: ../../struct.Style.html
/// [`Text`]: struct.Text.html
/// [`Node::with_measure`]: ../../struct.Node.html#method.with_measure
fn layout(&self, text: &Text, limits: &layout::Limits) -> layout::Node;
/// Draws a [`Text`] fragment.
///
/// It receives:
/// * the bounds of the [`Text`]
/// * the contents of the [`Text`]
/// * the size of the [`Text`]
/// * the color of the [`Text`]
/// * the [`HorizontalAlignment`] of the [`Text`]
/// * the [`VerticalAlignment`] of the [`Text`]
///
/// [`Text`]: struct.Text.html
/// [`HorizontalAlignment`]: enum.HorizontalAlignment.html
/// [`VerticalAlignment`]: enum.VerticalAlignment.html
fn draw(&mut self, text: &Text, layout: Layout<'_>) -> Self::Output;
}
impl<'a, Message, Renderer> From<Text> for Element<'a, Message, Renderer>
where
Renderer: self::Renderer,
{
fn from(text: Text) -> Element<'a, Message, Renderer> {
Element::new(text)
}
}
|
