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|
use crate::rect;
use sdl2::{rect::Rect, render::Canvas, video::Window};
#[derive(Debug, Clone)]
pub struct Container {
pub start: (i32, i32),
pub width: u32,
pub height: u32,
}
pub enum Size {
Max,
Absolute(u32),
}
#[derive(Debug, Copy, PartialEq, Clone)]
pub enum Offset {
Top(u32),
Left(u32),
Bottom(u32),
Right(u32),
}
#[derive(Debug, Copy, PartialEq, Clone)]
pub enum HorAlign {
Left,
Center,
Right,
}
#[derive(Debug, Copy, PartialEq, Clone)]
pub enum VertAlign {
Top,
Center,
Bottom,
}
impl Offset {
fn apply(self, size: u32) -> u32 {
match self {
Self::Top(t) => t,
Self::Left(l) => l,
Self::Bottom(b) => size - b,
Self::Right(r) => size - r,
}
}
}
impl Container {
pub fn uninit() -> Self {
Self {
start: (0, 0),
width: 0,
height: 0,
}
}
pub fn new(start_x: Offset, start_y: Offset, canvas: &Canvas<Window>) -> Self {
let (winsize_x, winsize_y) = canvas.window().size();
Self {
start: (
start_x.apply(winsize_x) as i32,
start_y.apply(winsize_y) as i32,
),
width: 0,
height: 0,
}
}
pub fn width(mut self, size: Size, canvas: &Canvas<Window>) -> Self {
match size {
Size::Max => {
let (winsize_x, _) = canvas.window().size();
self.width = winsize_x;
}
Size::Absolute(x) => {
self.width = x;
}
}
self
}
pub fn height(mut self, size: Size, canvas: &Canvas<Window>) -> Self {
match size {
Size::Max => {
let (_, winsize_y) = canvas.window().size();
self.height = winsize_y;
}
Size::Absolute(y) => {
self.height = y;
}
}
self
}
pub fn place(&self, widget: &mut Container, hor_align: HorAlign, vert_align: VertAlign) {
let x = self.start.0
+ match hor_align {
HorAlign::Left => 0,
HorAlign::Center => ((self.width / 2).saturating_sub(widget.width / 2)) as i32,
HorAlign::Right => (self.width - widget.width) as i32,
};
let y = self.start.1
+ match vert_align {
VertAlign::Top => 0,
VertAlign::Center => ((self.height / 2).saturating_sub(widget.height / 2)) as i32,
VertAlign::Bottom => (self.height - widget.height) as i32,
};
widget.start = (x, y);
}
pub fn area(&self) -> Rect {
rect!(self.start.0, self.start.1, self.width, self.height)
}
}
#[derive(Debug, Copy, Clone)]
pub struct Widget {
width: u32,
height: u32,
}
impl Widget {
pub fn linear_layout(widgets: &[Widget], padding: u32) -> Widget {
Widget {
width: widgets.iter().fold(0, |acc, x| acc + x.width + padding),
height: widgets.iter().map(|x| x.height).max().unwrap_or(0),
}
}
}
|
