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Layout

Struct Layout 

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pub struct Layout { /* private fields */ }
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布局系统相关功能 布局

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impl Layout

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pub fn vertical(constraints: Vec<Constraint>) -> Self

创建垂直布局

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pub fn horizontal(constraints: Vec<Constraint>) -> Self

创建水平布局

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pub fn split(&self, area: Rect) -> Vec<Rect>

分割区域

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