appy 0.1.6

Declarative UI framework with native rendering
Documentation 
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//use std::ops::{Add,Neg};

/// Holds information about a rectangle.
#[derive(Clone)]
pub struct Rect {
    pub x: f32,
    pub y: f32,
    pub w: f32,
    pub h: f32,
}

impl Rect {
    pub fn abs(&self, x: f32, y: f32, w: f32, h: f32) -> Rect {
        Self {
            x: self.x + x,
            y: self.y + y,
            w,
            h,
        }
    }

    pub fn contains(&self, x: f32, y: f32) -> bool {
        if x >= self.x && y >= self.y && x < self.x + self.w && y < self.y + self.h {
            return true;
        }

        false
    }

    pub fn vflip(self: Self) -> Rect {
        Self {
            x: self.x,
            y: self.y + self.h,
            w: self.w,
            h: -self.h,
        }
    }

    pub fn hflip(self: Self) -> Rect {
        Self {
            x: self.x + self.w,
            y: self.y,
            w: -self.w,
            h: self.h,
        }
    }

    pub fn hvflip(self: Self) -> Rect {
        self.vflip().hflip()
    }

    pub fn edge(self: Self, edge: u32, size: f32) -> Self {
        match edge {
            0 => Self {
                x: self.x,
                w: self.w,
                y: self.y,
                h: size,
            },
            1 => Self {
                x: self.x + self.w,
                w: -size,
                y: self.y,
                h: self.h,
            },
            2 => Self {
                x: self.x,
                w: self.w,
                y: self.y + self.h,
                h: -size,
            },
            3 => Self {
                x: self.x,
                w: size,
                y: self.y,
                h: self.h,
            },
            _ => {
                panic!("unknown edge")
            }
        }
    }

    /*pub fn empty()->Self {
        Self {x:0 as T, y:0 as T, w:0 as T, h:0 as T}
    }*/
}