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Add Align2::anchor_size (#3863)

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Emil Ernerfeldt
2024-01-22 16:47:50 +01:00
committed by GitHub
parent 9fb83d3541
commit 31cc31a67b
4 changed files with 21 additions and 6 deletions
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17
crates/emath/src/align.rs
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@@ -186,6 +186,23 @@ impl Align2 {
Rect::from_min_size(pos2(x, y), rect.size())
}
/// Use this anchor to position something around `pos`,
/// e.g. [`Self::RIGHT_TOP`] means the right-top of the rect
/// will end up at `pos`.
pub fn anchor_size(self, pos: Pos2, size: Vec2) -> Rect {
let x = match self.x() {
Align::Min => pos.x,
Align::Center => pos.x - 0.5 * size.x,
Align::Max => pos.x - size.x,
};
let y = match self.y() {
Align::Min => pos.y,
Align::Center => pos.y - 0.5 * size.y,
Align::Max => pos.y - size.y,
};
Rect::from_min_size(pos2(x, y), size)
}
/// e.g. center a size within a given frame
pub fn align_size_within_rect(self, size: Vec2, frame: Rect) -> Rect {
let x_range = self.x().align_size_within_range(size.x, frame.x_range());