52 lines
1.7 KiB
Rust
52 lines
1.7 KiB
Rust
use crate::{Point, Rectangle, Vector};
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/// The mouse cursor state.
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#[derive(Debug, Clone, Copy, PartialEq, Default)]
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pub enum Cursor {
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/// The cursor has a defined position.
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Available(Point),
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/// The cursor is currently unavailable (i.e. out of bounds or busy).
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#[default]
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Unavailable,
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}
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impl Cursor {
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/// Returns the absolute position of the [`Cursor`], if available.
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pub fn position(self) -> Option<Point> {
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match self {
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Cursor::Available(position) => Some(position),
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Cursor::Unavailable => None,
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}
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}
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/// Returns the absolute position of the [`Cursor`], if available and inside
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/// the given bounds.
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///
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/// If the [`Cursor`] is not over the provided bounds, this method will
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/// return `None`.
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pub fn position_over(self, bounds: Rectangle) -> Option<Point> {
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self.position().filter(|p| bounds.contains(*p))
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}
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/// Returns the relative position of the [`Cursor`] inside the given bounds,
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/// if available.
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///
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/// If the [`Cursor`] is not over the provided bounds, this method will
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/// return `None`.
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pub fn position_in(self, bounds: Rectangle) -> Option<Point> {
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self.position_over(bounds)
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.map(|p| p - Vector::new(bounds.x, bounds.y))
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}
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/// Returns the relative position of the [`Cursor`] from the given origin,
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/// if available.
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pub fn position_from(self, origin: Point) -> Option<Point> {
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self.position().map(|p| p - Vector::new(origin.x, origin.y))
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}
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/// Returns true if the [`Cursor`] is over the given `bounds`.
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pub fn is_over(self, bounds: Rectangle) -> bool {
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self.position_over(bounds).is_some()
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}
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}
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