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ContainerParentDataMixin

inset_rendering

Trait ContainerParentDataMixin 

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pub trait ContainerParentDataMixin: ParentData {
    type ChildType: Copy + PartialEq;

    // Required methods
    fn container_parent_data(&self) -> &ContainerParentData<Self::ChildType>;
    fn container_parent_data_mut(
        &mut self,
    ) -> &mut ContainerParentData<Self::ChildType>;

    // Provided methods
    fn previous_sibling(&self) -> Option<Self::ChildType> { ... }
    fn set_previous_sibling(&mut self, value: Option<Self::ChildType>) { ... }
    fn next_sibling(&self) -> Option<Self::ChildType> { ... }
    fn set_next_sibling(&mut self, value: Option<Self::ChildType>) { ... }
    fn detach(&mut self) { ... }
}
Expand description

Parent data to support a doubly-linked list of children.

The children can be traversed using next_sibling or previous_sibling, which can be called on the parent data of the render objects obtained via crate::ContainerRenderObjectMixin::first_child or crate::ContainerRenderObjectMixin::last_child.

Flutter’s ContainerParentDataMixin. The links live in a ContainerParentData field.

Required Associated Types§

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type ChildType: Copy + PartialEq

The type-erased handle of a child in the list. AnyRenderBox for a box container.

Required Methods§

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fn container_parent_data(&self) -> &ContainerParentData<Self::ChildType>

Mixin field access.

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fn container_parent_data_mut( &mut self, ) -> &mut ContainerParentData<Self::ChildType>

See container_parent_data.

Provided Methods§

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fn previous_sibling(&self) -> Option<Self::ChildType>

The previous sibling in the parent’s child list.

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fn set_previous_sibling(&mut self, value: Option<Self::ChildType>)

Sets previous_sibling.

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fn next_sibling(&self) -> Option<Self::ChildType>

The next sibling in the parent’s child list.

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fn set_next_sibling(&mut self, value: Option<Self::ChildType>)

Sets next_sibling.

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fn detach(&mut self)

Clear the sibling pointers.

The body of Flutter’s detach override; call it from ParentData::detach.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§