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/*
* Copyright (C) Oscar Shrimpton 2020
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
use std::fmt::Debug;
#[derive(Debug, Clone, PartialEq)]
/// A boolean input, with additional tracking for if it just changed state.
pub struct Button {
/// How many of the mapped inputs are currently pressed.
/// This is used so that holding one button, then another, then releasing the first, will keep the button down continuously as expected.
inputs_down: u8,
/// Whether or not the button changed state in the last batch of actions processed
/// Note that pushing 2 buttons bound to this action one after the other won't trigger this twice.
pub is_hot: bool,
}
impl Button {
pub fn new() -> Self {
Button {
inputs_down: 0,
is_hot: false,
}
}
pub fn is_down(&self) -> bool {
self.inputs_down > 0
}
pub fn is_up(&self) -> bool {
self.inputs_down == 0
}
pub fn is_just_down(&self) -> bool {
self.is_down() && self.is_hot
}
pub fn is_just_up(&self) -> bool {
self.is_up() && self.is_hot
}
pub fn modify_inputs(&mut self, add: bool) {
self.inputs_down = if add {
self.inputs_down + 1
} else {
self.inputs_down - 1
};
if self.inputs_down == 1 || self.inputs_down == 0 {
self.is_hot = true;
}
}
pub fn set_not_hot(&mut self) {
self.is_hot = false;
}
}
impl Default for Button {
fn default() -> Self {
Self::new()
}
}
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