Joscha
638a449343
Constructor functions that set/overwrite a value are called with_*, functions that add a value are called and_*.
77 lines
2 KiB
Rust
77 lines
2 KiB
Rust
use palette::Srgba;
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use taffy::Layout;
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use crate::{color, Rect, Vec2, View, Widget};
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pub struct Block {
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border: Srgba,
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background: Srgba,
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}
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impl Block {
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pub fn new() -> Self {
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Self {
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border: color::TRANSPARENT,
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background: color::TRANSPARENT,
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}
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}
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pub fn with_border(mut self, color: Srgba) -> Self {
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self.border = color;
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self
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}
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pub fn with_background(mut self, color: Srgba) -> Self {
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self.background = color;
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self
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}
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}
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impl Default for Block {
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fn default() -> Self {
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Self::new()
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}
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}
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impl<C> Widget<C> for Block {
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fn draw_below(
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&mut self,
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_ctx: &mut C,
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view: &mut View<'_>,
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layout: &Layout,
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) -> anyhow::Result<()> {
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let area = view.area();
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// Background
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view.rect(area, self.background);
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// And now... the border!
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//
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// It is important not to draw pixels twice in case the border color is
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// transparent. That's why the logic below is a bit more complex.
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let left = layout.border.left as i32;
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let right = layout.border.right as i32;
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let top = layout.border.top as i32;
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let bottom = layout.border.bottom as i32;
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if top > 0 {
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let border = Rect::from_nw(area.corner_nw(), area.size().with_y(top));
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view.rect(border, self.border);
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}
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if bottom > 0 {
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let border = Rect::from_sw(area.corner_sw(), area.size().with_y(bottom));
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view.rect(border, self.border);
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}
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if left > 0 {
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let nw = area.corner_nw() + Vec2::new(0, top);
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let size = Vec2::new(left, area.size().y - top - bottom);
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view.rect(Rect::from_nw(nw, size), self.border);
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}
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if right > 0 {
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let ne = area.corner_ne() + Vec2::new(0, top);
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let size = Vec2::new(right, area.size().y - top - bottom);
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view.rect(Rect::from_ne(ne, size), self.border);
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}
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Ok(())
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}
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}
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