diff options
Diffstat (limited to 'src/widget/checkbox.rs')
| -rw-r--r-- | src/widget/checkbox.rs | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/src/widget/checkbox.rs b/src/widget/checkbox.rs deleted file mode 100644 index 48400fae..00000000 --- a/src/widget/checkbox.rs +++ /dev/null @@ -1,199 +0,0 @@ -//! Show toggle controls using checkboxes. -use std::hash::Hash; - -use crate::input::{mouse, ButtonState}; -use crate::widget::{text, Column, Row, Text}; -use crate::{ - Align, Color, Element, Event, Hasher, Layout, MouseCursor, Node, Point, - Rectangle, Widget, -}; - -/// A box that can be checked. -/// -/// It implements [`Widget`] when the associated `Renderer` implements the -/// [`checkbox::Renderer`] trait. -/// -/// [`Widget`]: ../trait.Widget.html -/// [`checkbox::Renderer`]: trait.Renderer.html -/// -/// # Example -/// -/// ``` -/// use iced::{Checkbox, Color}; -/// -/// pub enum Message { -/// CheckboxToggled(bool), -/// } -/// -/// let is_checked = true; -/// -/// Checkbox::new(is_checked, "Toggle me!", Message::CheckboxToggled); -/// ``` -/// -///  -pub struct Checkbox<Message> { - /// Whether the checkbox is checked or not - pub is_checked: bool, - - /// Function to call when checkbox is toggled to produce a __message__. - /// - /// The function should be provided `true` when the checkbox is checked - /// and `false` otherwise. - pub on_toggle: Box<dyn Fn(bool) -> Message>, - - /// The label of the checkbox - pub label: String, - - /// The color of the label - pub label_color: Option<Color>, -} - -impl<Message> std::fmt::Debug for Checkbox<Message> { - fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { - f.debug_struct("Checkbox") - .field("is_checked", &self.is_checked) - .field("label", &self.label) - .field("label_color", &self.label_color) - .finish() - } -} - -impl<Message> Checkbox<Message> { - /// Creates a new [`Checkbox`]. - /// - /// It expects: - /// * a boolean describing whether the [`Checkbox`] is checked or not - /// * the label of the [`Checkbox`] - /// * a function that will be called when the [`Checkbox`] is toggled. - /// It will receive the new state of the [`Checkbox`] and must produce - /// a `Message`. - /// - /// [`Checkbox`]: struct.Checkbox.html - pub fn new<F>(is_checked: bool, label: &str, f: F) -> Self - where - F: 'static + Fn(bool) -> Message, - { - Checkbox { - is_checked, - on_toggle: Box::new(f), - label: String::from(label), - label_color: None, - } - } - - /// Sets the color of the label of the [`Checkbox`]. - /// - /// [`Checkbox`]: struct.Checkbox.html - pub fn label_color<C: Into<Color>>(mut self, color: C) -> Self { - self.label_color = Some(color.into()); - self - } -} - -impl<Message, Renderer> Widget<Message, Renderer> for Checkbox<Message> -where - Renderer: self::Renderer + text::Renderer, -{ - fn node(&self, renderer: &mut Renderer) -> Node { - Row::<(), Renderer>::new() - .spacing(15) - .align_items(Align::Center) - .push(Column::new().width(28).height(28)) - .push(Text::new(&self.label)) - .node(renderer) - } - - fn on_event( - &mut self, - event: Event, - layout: Layout<'_>, - cursor_position: Point, - messages: &mut Vec<Message>, - ) { - match event { - Event::Mouse(mouse::Event::Input { - button: mouse::Button::Left, - state: ButtonState::Pressed, - }) => { - let mouse_over = layout - .children() - .any(|child| child.bounds().contains(cursor_position)); - - if mouse_over { - messages.push((self.on_toggle)(!self.is_checked)); - } - } - _ => {} - } - } - - fn draw( - &self, - renderer: &mut Renderer, - layout: Layout<'_>, - cursor_position: Point, - ) -> MouseCursor { - let children: Vec<_> = layout.children().collect(); - - let text_bounds = children[1].bounds(); - - text::Renderer::draw( - renderer, - text_bounds, - &self.label, - None, - self.label_color, - text::HorizontalAlignment::Left, - text::VerticalAlignment::Top, - ); - - self::Renderer::draw( - renderer, - cursor_position, - children[0].bounds(), - text_bounds, - self.is_checked, - ) - } - - fn hash_layout(&self, state: &mut Hasher) { - self.label.hash(state); - } -} - -/// The renderer of a [`Checkbox`]. -/// -/// Your [renderer] will need to implement this trait before being -/// able to use a [`Checkbox`] in your user interface. -/// -/// [`Checkbox`]: struct.Checkbox.html -/// [renderer]: ../../renderer/index.html -pub trait Renderer { - /// Draws a [`Checkbox`]. - /// - /// It receives: - /// * the current cursor position - /// * the bounds of the [`Checkbox`] - /// * the bounds of the label of the [`Checkbox`] - /// * whether the [`Checkbox`] is checked or not - /// - /// [`Checkbox`]: struct.Checkbox.html - fn draw( - &mut self, - cursor_position: Point, - bounds: Rectangle, - label_bounds: Rectangle, - is_checked: bool, - ) -> MouseCursor; -} - -impl<'a, Message, Renderer> From<Checkbox<Message>> - for Element<'a, Message, Renderer> -where - Renderer: self::Renderer + text::Renderer, - Message: 'static, -{ - fn from(checkbox: Checkbox<Message>) -> Element<'a, Message, Renderer> { - Element::new(checkbox) - } -} |