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// Copyright (c) 2019-present Dmitry Stepanov and Fyrox Engine contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//! Describes the thickness of a frame around a rectangle (for all four sides).
use crate::core::{algebra::Vector2, reflect::prelude::*, visitor::prelude::*};
/// Describes the thickness of a frame around a rectangle (for all four sides). It is primarily used to
/// define margins and to define stroke thickness for various widgets.
#[derive(Copy, Clone, PartialEq, Debug, Reflect, Visit)]
pub struct Thickness {
/// Thickness of the left side of a rectangle.
pub left: f32,
/// Thickness of the top side of a rectangle.
pub top: f32,
/// Thickness of the right side of a rectangle.
pub right: f32,
/// Thickness of the bottom side of a rectangle.
pub bottom: f32,
}
impl Default for Thickness {
fn default() -> Self {
Self::uniform(0.0)
}
}
impl Thickness {
/// Degenerate thickness that has no effect.
pub fn zero() -> Self {
Self {
left: 0.0,
top: 0.0,
right: 0.0,
bottom: 0.0,
}
}
/// Uniform thickness for all four sides of a rectangle.
pub fn uniform(v: f32) -> Self {
Self {
left: v,
top: v,
right: v,
bottom: v,
}
}
/// Thickness for the bottom side of a rectangle.
pub fn bottom(v: f32) -> Self {
Self {
left: 0.0,
top: 0.0,
right: 0.0,
bottom: v,
}
}
/// Thickness for the top side of a rectangle.
pub fn top(v: f32) -> Self {
Self {
left: 0.0,
top: v,
right: 0.0,
bottom: 0.0,
}
}
/// Thickness for the left side of a rectangle.
pub fn left(v: f32) -> Self {
Self {
left: v,
top: 0.0,
right: 0.0,
bottom: 0.0,
}
}
/// Thickness for the rigth side of a rectangle.
pub fn right(v: f32) -> Self {
Self {
left: 0.0,
top: 0.0,
right: v,
bottom: 0.0,
}
}
/// Thickness for the top and right sides of a rectangle.
pub fn top_right(v: f32) -> Self {
Self {
left: 0.0,
top: v,
right: v,
bottom: 0.0,
}
}
/// Thickness for the top and left sides of a rectangle.
pub fn top_left(v: f32) -> Self {
Self {
left: v,
top: v,
right: 0.0,
bottom: 0.0,
}
}
/// Thickness for the bottom and right sides of a rectangle.
pub fn bottom_right(v: f32) -> Self {
Self {
left: 0.0,
top: 0.0,
right: v,
bottom: v,
}
}
/// Thickness for the bottom and left sides of a rectangle.
pub fn bottom_left(v: f32) -> Self {
Self {
left: v,
top: 0.0,
right: 0.0,
bottom: v,
}
}
/// Thickness for the top and bottom sides of a rectangle.
pub fn top_bottom(v: f32) -> Self {
Self {
left: 0.0,
top: v,
right: 0.0,
bottom: v,
}
}
/// Thickness for the left and right sides of a rectangle.
pub fn left_right(v: f32) -> Self {
Self {
left: v,
top: 0.0,
right: v,
bottom: 0.0,
}
}
/// Returns an offset defined by this thickness. It is just a vector `(left, top)`.
pub fn offset(&self) -> Vector2<f32> {
Vector2::new(self.left, self.top)
}
/// Returns a margin for each axis (horizontal and vertical).
pub fn axes_margin(&self) -> Vector2<f32> {
Vector2::new(self.left + self.right, self.top + self.bottom)
}
}