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# Objective `Text2d` ignores `TextBounds` when calculating the offset for text aligment. On main a text entity positioned in the center of the window with center justification and 600px horizontal text bounds isn't centered like it should be but shifted off to the right: <img width="305" alt="hellox" src="https://github.com/user-attachments/assets/8896c6f0-1b9f-4633-9c12-1de6eff5f3e1" /> (second example in the testing section below) Fixes #14266 I already had a PR in review for this (#14270) but it used post layout adjustment (which we want to avoid) and ignored `TextBounds`. ## Solution * If `TextBounds` are present for an axis, use them instead of the size of the computed text layout size to calculate the offset. * Adjust the vertical offset of text so it's top is aligned with the top of the texts bounding rect (when present). ## Testing ``` use bevy::prelude::*; use bevy::color::palettes; use bevy::sprite::Anchor; use bevy::text::TextBounds; fn main() { App::new() .add_plugins(DefaultPlugins) .add_systems(Startup, setup) .run(); } fn example(commands: &mut Commands, dest: Vec3, justify: JustifyText) { commands.spawn(( Sprite { color: palettes::css::YELLOW.into(), custom_size: Some(10. * Vec2::ONE), anchor: Anchor::Center, ..Default::default() }, Transform::from_translation(dest), )); for a in [ Anchor::TopLeft, Anchor::TopRight, Anchor::BottomRight, Anchor::BottomLeft, ] { commands.spawn(( Text2d(format!("L R\n{:?}\n{:?}", a, justify)), TextFont { font_size: 14.0, ..default() }, TextLayout { justify, ..Default::default() }, TextBounds::new(300., 75.), Transform::from_translation(dest + Vec3::Z), a, )); } } fn setup(mut commands: Commands) { commands.spawn(Camera2d::default()); for (i, j) in [ JustifyText::Left, JustifyText::Right, JustifyText::Center, JustifyText::Justified, ] .into_iter() .enumerate() { example(&mut commands, (300. - 150. * i as f32) * Vec3::Y, j); } commands.spawn(Sprite { color: palettes::css::YELLOW.into(), custom_size: Some(10. * Vec2::ONE), anchor: Anchor::Center, ..Default::default() }); } ``` <img width="566" alt="cap" src="https://github.com/user-attachments/assets/e6a98fa5-80b2-4380-a9b7-155bb49635b8" /> This probably looks really confusing but it should make sense if you imagine each block of text surrounded by a 300x75 rectangle that is anchored to the center of the yellow square. # ``` use bevy::prelude::*; use bevy::sprite::Anchor; use bevy::text::TextBounds; fn main() { App::new() .add_plugins(DefaultPlugins) .add_systems(Startup, setup) .run(); } fn setup(mut commands: Commands) { commands.spawn(Camera2d::default()); commands.spawn(( Text2d::new("hello"), TextFont { font_size: 60.0, ..default() }, TextLayout::new_with_justify(JustifyText::Center), TextBounds::new(600., 200.), Anchor::Center, )); } ``` <img width="338" alt="hello" src="https://github.com/user-attachments/assets/e5e89364-afda-4baa-aca8-df4cdacbb4ed" /> The text being above the center is intended. When `TextBounds` are present, the text block's offset is calculated using its `TextBounds` not the layout size returned by cosmic-text. # Probably we should add a vertical alignment setting for Text2d. Didn't do it here as this is intended for a 0.15.2 release. |
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