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Add methods for calculating the size and postion of UI nodes #7930

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merged 14 commits into from
Mar 9, 2023
Merged

Add methods for calculating the size and postion of UI nodes #7930

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c18f9ae
Replaced the image from the `UI` example that was removed by the Acce…
ickshonpe Mar 4, 2023
50daa18
removed the alt text
ickshonpe Mar 4, 2023
d49d2b9
remove comment
ickshonpe Mar 4, 2023
b037850
cargo fmt --all
ickshonpe Mar 4, 2023
27d74e1
set logo image to display at a fixed size
ickshonpe Mar 4, 2023
63dc311
cargo fmt --all
ickshonpe Mar 6, 2023
6c7b2ab
Added helper functions that calculate the size of a ui node from its …
ickshonpe Mar 6, 2023
91e9d23
Implemented helper functions as methods on `Node` instead.
ickshonpe Mar 6, 2023
6e33fc0
cargo fmt
ickshonpe Mar 6, 2023
b5386a3
undo ui example changes
ickshonpe Mar 6, 2023
dd981d7
cargo fmt --all
ickshonpe Mar 6, 2023
b4cf3d9
* Added doc comments for both methods.
ickshonpe Mar 9, 2023
b219cb9
Update crates/bevy_ui/src/ui_node.rs
ickshonpe Mar 9, 2023
f0b355b
Update crates/bevy_ui/src/ui_node.rs
ickshonpe Mar 9, 2023
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17 changes: 17 additions & 0 deletions crates/bevy_ui/src/ui_node.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ use bevy_render::{
color::Color,
texture::{Image, DEFAULT_IMAGE_HANDLE},
};
use bevy_transform::prelude::GlobalTransform;
use serde::{Deserialize, Serialize};
use std::ops::{Div, DivAssign, Mul, MulAssign};
use thiserror::Error;
Expand All @@ -26,6 +27,22 @@ impl Node {
pub fn size(&self) -> Vec2 {
self.calculated_size
}

/// Returns the logical pixel coordinates of the UI node, based on its `GlobalTransform`.
#[inline]
pub fn logical_rect(&self, transform: &GlobalTransform) -> Rect {
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Rect::from_center_size(transform.translation().truncate(), self.size())
}

/// Returns the physical pixel coordinates of the UI node, based on its `GlobalTransform` and the scale factor.
#[inline]
pub fn physical_rect(&self, transform: &GlobalTransform, scale_factor: f32) -> Rect {
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let rect = self.logical_rect(transform);
Rect {
min: rect.min / scale_factor,
max: rect.max / scale_factor,
}
}
}

impl Node {
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