Trait ContainerRenderObjectMixin 

pub trait ContainerRenderObjectMixin: RenderObject {
    type ChildType: ErasedRenderObject;
    type ParentDataType: ContainerParentDataMixin<ChildType = Self::ChildType> + 'static;

    // Required methods
    fn container_data(
        self: RenderHandle<Self>,
        app: &App,
    ) -> &ContainerRenderObjectData<Self::ChildType>;
    fn container_data_mut(
        self: RenderHandle<Self>,
        app: &mut App,
    ) -> &mut ContainerRenderObjectData<Self::ChildType>;

    // Provided methods
    fn child_count(self: RenderHandle<Self>, app: &App) -> usize { ... }
    fn insert(
        self: RenderHandle<Self>,
        app: &mut App,
        child: Self::ChildType,
        after: Option<Self::ChildType>,
    ) { ... }
    fn add(self: RenderHandle<Self>, app: &mut App, child: Self::ChildType) { ... }
    fn add_all(
        self: RenderHandle<Self>,
        app: &mut App,
        children: Option<Vec<Self::ChildType>>,
    ) { ... }
    fn remove(self: RenderHandle<Self>, app: &mut App, child: Self::ChildType) { ... }
    fn remove_all(self: RenderHandle<Self>, app: &mut App) { ... }
    fn move_child(
        self: RenderHandle<Self>,
        app: &mut App,
        child: Self::ChildType,
        after: Option<Self::ChildType>,
    ) { ... }
    fn did_attach(
        self: RenderHandle<Self>,
        app: &mut App,
        owner: Handle<PipelineOwner>,
    ) { ... }
    fn did_detach(self: RenderHandle<Self>, app: &mut App) { ... }
    fn redepth_children(self: RenderHandle<Self>, app: &mut App) { ... }
    fn visit_children(
        self: RenderHandle<Self>,
        app: &App,
        visitor: &mut dyn FnMut(AnyRenderObject),
    ) { ... }
    fn first_child(
        self: RenderHandle<Self>,
        app: &App,
    ) -> Option<Self::ChildType> { ... }
    fn last_child(
        self: RenderHandle<Self>,
        app: &App,
    ) -> Option<Self::ChildType> { ... }
    fn child_before(
        self: RenderHandle<Self>,
        app: &App,
        child: Self::ChildType,
    ) -> Option<Self::ChildType> { ... }
    fn child_after(
        self: RenderHandle<Self>,
        app: &App,
        child: Self::ChildType,
    ) -> Option<Self::ChildType> { ... }
    fn children_as_list(
        self: RenderHandle<Self>,
        app: &App,
    ) -> Vec<Self::ChildType> { ... }
}

Generic mixin for render objects with a list of children.

Provides a child model for a render object that has a doubly-linked list of children.

ParentDataType stores parent container data on its child render objects. It must be a ContainerParentDataMixin, which provides the interface for visiting children. This data is populated by the setup_parent_data implemented by the render object using this mixin.

Flutter’s ContainerRenderObjectMixin. Its two type arguments are the associated types ChildType and ParentDataType.

Required Associated Types

type ChildType: ErasedRenderObject

Flutter’s ChildType: the protocol of this render object’s children.

type ParentDataType: ContainerParentDataMixin<ChildType = Self::ChildType> + 'static

Flutter’s ParentDataType: the parent data this render object installs on its children.

Required Methods

fn container_data( self: RenderHandle<Self>, app: &App, ) -> &ContainerRenderObjectData<Self::ChildType>

Mixin field access.

fn container_data_mut( self: RenderHandle<Self>, app: &mut App, ) -> &mut ContainerRenderObjectData<Self::ChildType>

See container_data.

Provided Methods

fn child_count(self: RenderHandle<Self>, app: &App) -> usize

The number of children.

fn insert( self: RenderHandle<Self>, app: &mut App, child: Self::ChildType, after: Option<Self::ChildType>, )

Insert child into this render object’s child list after the given child.

If after is None, then this inserts the child at the start of the list, and the child becomes the new first_child.

fn add(self: RenderHandle<Self>, app: &mut App, child: Self::ChildType)

Append child to the end of this render object’s child list.

fn add_all( self: RenderHandle<Self>, app: &mut App, children: Option<Vec<Self::ChildType>>, )

Add all the children to the end of this render object’s child list.

fn remove(self: RenderHandle<Self>, app: &mut App, child: Self::ChildType)

Remove this child from the child list.

Requires the child to be present in the child list.

fn remove_all(self: RenderHandle<Self>, app: &mut App)

Remove all their children from this render object’s child list.

More efficient than removing them individually.

fn move_child( self: RenderHandle<Self>, app: &mut App, child: Self::ChildType, after: Option<Self::ChildType>, )

Move the given child in the child list to be after another child.

Dart’s move. More efficient than removing and re-adding the child. Requires the child to already be in the child list at some position. Pass None for after to move the child to the start of the child list.

fn did_attach( self: RenderHandle<Self>, app: &mut App, owner: Handle<PipelineOwner>, )

The body of Flutter’s attach override: attaches every child in the list.

fn did_detach(self: RenderHandle<Self>, app: &mut App)

The body of Flutter’s detach override: detaches every child in the list.

fn redepth_children(self: RenderHandle<Self>, app: &mut App)

Flutter’s redepthChildren: walks the child list.

fn visit_children( self: RenderHandle<Self>, app: &App, visitor: &mut dyn FnMut(AnyRenderObject), )

Flutter’s visitChildren: walks the child list.

fn first_child(self: RenderHandle<Self>, app: &App) -> Option<Self::ChildType>

The first child in the child list.

fn last_child(self: RenderHandle<Self>, app: &App) -> Option<Self::ChildType>

The last child in the child list.

fn child_before( self: RenderHandle<Self>, app: &App, child: Self::ChildType, ) -> Option<Self::ChildType>

The previous child before the given child in the child list.

fn child_after( self: RenderHandle<Self>, app: &App, child: Self::ChildType, ) -> Option<Self::ChildType>

The next child after the given child in the child list.

fn children_as_list(self: RenderHandle<Self>, app: &App) -> Vec<Self::ChildType>

Returns a list containing the children of this render object.

Dart’s RenderBoxContainerDefaultsMixin.getChildrenAsList, useful for any container.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors

impl ContainerRenderObjectMixin for RenderCustomMultiChildLayoutBox

type ChildType = AnyRenderBox

type ParentDataType = MultiChildLayoutParentData

impl ContainerRenderObjectMixin for RenderEditable

type ChildType = AnyRenderBox

type ParentDataType = TextParentData

impl ContainerRenderObjectMixin for RenderFlex

type ChildType = AnyRenderBox

type ParentDataType = FlexParentData

impl ContainerRenderObjectMixin for RenderIndexedStack

type ChildType = AnyRenderBox

type ParentDataType = StackParentData

impl ContainerRenderObjectMixin for RenderParagraph

type ChildType = AnyRenderBox

type ParentDataType = TextParentData

impl ContainerRenderObjectMixin for RenderShrinkWrappingViewport

type ChildType = AnyRenderSliver

type ParentDataType = SliverLogicalContainerParentData

impl ContainerRenderObjectMixin for RenderSliverFixedExtentList

type ChildType = AnyRenderBox

type ParentDataType = SliverMultiBoxAdaptorParentData

impl ContainerRenderObjectMixin for RenderSliverGrid

type ChildType = AnyRenderBox

type ParentDataType = SliverMultiBoxAdaptorParentData

impl ContainerRenderObjectMixin for RenderSliverList

type ChildType = AnyRenderBox

type ParentDataType = SliverMultiBoxAdaptorParentData

impl ContainerRenderObjectMixin for RenderSliverVariedExtentList

type ChildType = AnyRenderBox

type ParentDataType = SliverMultiBoxAdaptorParentData

impl ContainerRenderObjectMixin for RenderStack

type ChildType = AnyRenderBox

type ParentDataType = StackParentData

impl ContainerRenderObjectMixin for RenderViewport

type ChildType = AnyRenderSliver

type ParentDataType = SliverPhysicalContainerParentData

impl ContainerRenderObjectMixin for RenderWrap

type ChildType = AnyRenderBox

type ParentDataType = WrapParentData