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pub use self::keys::Keys;
pub use self::mouse::Mouse;
pub use self::time::Time;
pub use self::window::Window;
pub mod window {
use crate::geom;
use crate::window;
pub type DefaultScalar = geom::scalar::Default;
#[derive(Copy, Clone, Debug, PartialEq)]
pub struct Window {
pub id: Option<window::Id>,
}
impl Window {
pub fn new() -> Self {
Window { id: None }
}
pub fn id(&self) -> window::Id {
self.id.unwrap()
}
}
}
pub mod keys {
use crate::event::{Key, ModifiersState};
use std::collections::HashSet;
use std::ops::Deref;
#[derive(Clone, Debug, Default)]
pub struct Keys {
pub mods: ModifiersState,
pub down: Down,
}
#[derive(Clone, Debug, Default)]
pub struct Down {
pub(crate) keys: HashSet<Key>,
}
impl Deref for Down {
type Target = HashSet<Key>;
fn deref(&self) -> &Self::Target {
&self.keys
}
}
}
pub mod mouse {
use crate::geom::Point2;
use crate::window;
use std;
#[doc(inline)]
pub use crate::event::MouseButton as Button;
pub const NUM_BUTTONS: usize = 9;
#[derive(Copy, Clone, Debug, PartialEq)]
pub struct Mouse {
pub window: Option<window::Id>,
pub x: f32,
pub y: f32,
pub buttons: ButtonMap,
}
#[derive(Copy, Clone, Debug, PartialEq)]
pub enum ButtonPosition {
Up,
Down(Point2),
}
#[derive(Copy, Clone, Debug, PartialEq)]
pub struct ButtonMap {
buttons: [ButtonPosition; NUM_BUTTONS],
}
#[derive(Clone)]
pub struct PressedButtons<'a> {
buttons: std::iter::Enumerate<std::slice::Iter<'a, ButtonPosition>>,
}
impl Mouse {
pub fn new() -> Self {
Mouse {
window: None,
buttons: ButtonMap::new(),
x: 0.0,
y: 0.0,
}
}
pub fn position(&self) -> Point2 {
[self.x, self.y].into()
}
}
impl ButtonPosition {
pub fn relative_to(self, xy: Point2) -> Self {
match self {
ButtonPosition::Down(pos) => {
let rel_p = pos - xy;
ButtonPosition::Down([rel_p.x, rel_p.y].into())
}
button_pos => button_pos,
}
}
pub fn is_down(&self) -> bool {
match *self {
ButtonPosition::Down(_) => true,
_ => false,
}
}
pub fn is_up(&self) -> bool {
match *self {
ButtonPosition::Up => true,
_ => false,
}
}
pub fn if_down(&self) -> Option<Point2> {
match *self {
ButtonPosition::Down(xy) => Some(xy),
_ => None,
}
}
}
impl ButtonMap {
pub fn new() -> Self {
ButtonMap {
buttons: [ButtonPosition::Up; NUM_BUTTONS],
}
}
pub fn relative_to(self, xy: Point2) -> Self {
self.buttons
.iter()
.enumerate()
.fold(ButtonMap::new(), |mut map, (idx, button_pos)| {
map.buttons[idx] = button_pos.relative_to(xy);
map
})
}
pub fn left(&self) -> &ButtonPosition {
&self[Button::Left]
}
pub fn middle(&self) -> &ButtonPosition {
&self[Button::Middle]
}
pub fn right(&self) -> &ButtonPosition {
&self[Button::Right]
}
pub fn press(&mut self, button: Button, xy: Point2) {
self.buttons[button_to_idx(button)] = ButtonPosition::Down(xy);
}
pub fn release(&mut self, button: Button) {
self.buttons[button_to_idx(button)] = ButtonPosition::Up;
}
pub fn pressed(&self) -> PressedButtons {
PressedButtons {
buttons: self.buttons.iter().enumerate(),
}
}
}
impl std::ops::Index<Button> for ButtonMap {
type Output = ButtonPosition;
fn index(&self, button: Button) -> &Self::Output {
&self.buttons[button_to_idx(button)]
}
}
impl<'a> Iterator for PressedButtons<'a> {
type Item = (Button, Point2);
fn next(&mut self) -> Option<Self::Item> {
while let Some((idx, button_pos)) = self.buttons.next() {
if let ButtonPosition::Down(xy) = *button_pos {
return Some((idx_to_button(idx), xy));
}
}
None
}
}
fn idx_to_button(i: usize) -> Button {
match i {
n @ 0..=5 => Button::Other(n as u16),
6 => Button::Left,
7 => Button::Right,
8 => Button::Middle,
_ => Button::Other(std::u16::MAX),
}
}
fn button_to_idx(button: Button) -> usize {
match button {
Button::Other(n) => n as usize,
Button::Left => 6,
Button::Right => 7,
Button::Middle => 8,
}
}
}
pub mod time {
#[derive(Copy, Clone, Debug, Default, Eq, PartialEq, Hash)]
pub struct Time {
pub since_start: std::time::Duration,
pub since_prev_update: std::time::Duration,
}
impl Time {
pub fn updates_per_second(&self) -> f32 {
if self.since_prev_update.as_secs() > 0 {
return 0.0;
}
let millis = self.since_prev_update.subsec_millis() as f32;
if millis == 0.0 {
return std::f32::MAX;
}
1000.0 / millis
}
}
}