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LayoutCx

Struct LayoutCx 

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pub struct LayoutCx<'a> { /* private fields */ }
Expand description

布局上下文——容器组件通过它为子节点分配 Rect

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impl<'a> LayoutCx<'a>

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pub fn child_count(&self) -> usize

获取子节点数量

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pub fn child_style(&self, index: usize) -> Option<Style>

获取第 i 个子节点的 style

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pub fn layout_child(&mut self, index: usize, rect: Rect)

为第 i 个子节点设置布局 rect(递归触发子节点 layout)

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pub fn for_each_child(&mut self, f: impl FnMut(usize, &mut Node))

遍历所有子节点

Auto Trait Implementations§

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impl<'a> Freeze for LayoutCx<'a>

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impl<'a> !RefUnwindSafe for LayoutCx<'a>

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impl<'a> !Send for LayoutCx<'a>

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impl<'a> !Sync for LayoutCx<'a>

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impl<'a> Unpin for LayoutCx<'a>

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impl<'a> UnsafeUnpin for LayoutCx<'a>

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impl<'a> !UnwindSafe for LayoutCx<'a>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.