93 lines
2.5 KiB
Rust
93 lines
2.5 KiB
Rust
//! Show toggle controls using checkboxes.
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use std::hash::Hash;
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use crate::input::{mouse, ButtonState};
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use crate::{Element, Event, Hasher, Layout, Node, Point, Widget};
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pub use iced_core::Checkbox;
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impl<Message, Renderer> Widget<Message, Renderer> for Checkbox<Message>
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where
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Renderer: self::Renderer,
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{
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fn node(&self, renderer: &Renderer) -> Node {
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renderer.node(&self)
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}
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fn on_event(
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&mut self,
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event: Event,
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layout: Layout<'_>,
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cursor_position: Point,
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messages: &mut Vec<Message>,
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) {
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match event {
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Event::Mouse(mouse::Event::Input {
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button: mouse::Button::Left,
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state: ButtonState::Pressed,
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}) => {
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let mouse_over = layout.bounds().contains(cursor_position);
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if mouse_over {
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messages.push((self.on_toggle)(!self.is_checked));
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}
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}
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_ => {}
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}
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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, cursor_position)
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}
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fn hash_layout(&self, state: &mut Hasher) {
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self.label.hash(state);
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}
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}
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/// The renderer of a [`Checkbox`].
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///
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/// Your [renderer] will need to implement this trait before being
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/// able to use a [`Checkbox`] in your user interface.
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///
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/// [`Checkbox`]: struct.Checkbox.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 [`Checkbox`].
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///
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/// [`Node`]: ../../struct.Node.html
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/// [`Checkbox`]: struct.Checkbox.html
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fn node<Message>(&self, checkbox: &Checkbox<Message>) -> Node;
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/// Draws a [`Checkbox`].
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///
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/// It receives:
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/// * the current cursor position
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/// * the bounds of the [`Checkbox`]
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/// * the bounds of the label of the [`Checkbox`]
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/// * whether the [`Checkbox`] is checked or not
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///
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/// [`Checkbox`]: struct.Checkbox.html
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fn draw<Message>(
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&mut self,
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checkbox: &Checkbox<Message>,
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layout: Layout<'_>,
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cursor_position: Point,
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) -> Self::Output;
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}
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impl<'a, Message, Renderer> From<Checkbox<Message>>
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for Element<'a, Message, Renderer>
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where
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Renderer: self::Renderer,
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Message: 'static,
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{
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fn from(checkbox: Checkbox<Message>) -> Element<'a, Message, Renderer> {
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Element::new(checkbox)
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}
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}
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