130 lines
3.3 KiB
Rust
130 lines
3.3 KiB
Rust
// Copyright (c) 2022 Marceline Cramer
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// SPDX-License-Identifier: AGPL-3.0-or-later
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use super::prelude::*;
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#[derive(Copy, Clone, Debug, Eq, PartialEq)]
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pub enum HorizontalAlignment {
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Left,
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Center,
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Right,
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}
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pub struct LabelText {
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pub font: Font,
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pub text: String,
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}
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pub struct Label {
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text: LabelText,
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alignment: HorizontalAlignment,
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scale: f32,
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color: Color,
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left: f32,
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right: f32,
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baseline: f32,
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dirty: bool,
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layout: Option<TextLayout>,
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bounds: Rect,
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offset: Vec2,
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}
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impl Label {
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pub fn new(
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text: LabelText,
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alignment: HorizontalAlignment,
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scale: f32,
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color: Color,
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left: f32,
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right: f32,
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baseline: f32,
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) -> Self {
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Self {
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text,
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alignment,
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scale,
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color,
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left,
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right,
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baseline,
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dirty: true,
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layout: None,
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bounds: Rect::from_xy_size(Vec2::ZERO, Vec2::ZERO),
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offset: Vec2::ZERO,
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}
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}
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}
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impl Widget for Label {
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fn draw(&mut self, ctx: &DrawContext) {
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if self.dirty {
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let layout = TextLayout::new(&self.text.font, &self.text.text);
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let bounds = Rect::from(layout.get_bounds()).scale(self.scale);
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self.bounds = bounds;
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let xoff = match self.alignment {
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HorizontalAlignment::Left => self.left - bounds.bl.x,
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HorizontalAlignment::Right => self.right - bounds.tr.x,
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HorizontalAlignment::Center => {
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let available = self.right - self.left;
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let halfway = available / 2.0 + self.left;
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let width = bounds.tr.x - bounds.bl.x;
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let left = halfway - width / 2.0;
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left - bounds.bl.x
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}
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};
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self.offset = Vec2::new(xoff, self.baseline);
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self.dirty = false;
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self.layout = Some(layout);
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}
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if let Some(layout) = self.layout.as_ref() {
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ctx.draw_text_layout(layout, self.offset, self.scale, self.color);
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}
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}
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}
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pub struct Icon {
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text: LabelText,
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scale: f32,
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color: Color,
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center: Vec2,
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dirty: bool,
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layout: Option<TextLayout>,
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bounds: Rect,
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offset: Vec2,
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}
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impl Icon {
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pub fn new(text: LabelText, scale: f32, color: Color, center: Vec2) -> Self {
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Self {
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text,
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scale,
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color,
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center,
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dirty: true,
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layout: None,
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bounds: Rect::from_xy_size(Vec2::ZERO, Vec2::ZERO),
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offset: Vec2::ZERO,
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}
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}
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}
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impl Widget for Icon {
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fn draw(&mut self, ctx: &DrawContext) {
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if self.dirty {
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let layout = TextLayout::new(&self.text.font, &self.text.text);
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let bounds = Rect::from(layout.get_bounds()).scale(self.scale);
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self.bounds = bounds;
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self.offset = self.center - bounds.size() / 2.0;
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self.offset.y -= bounds.bl.y;
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self.dirty = false;
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self.layout = Some(layout);
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}
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if let Some(layout) = self.layout.as_ref() {
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ctx.draw_text_layout(layout, self.offset, self.scale, self.color);
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}
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}
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}
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