Struct i_slint_core::component::ComponentVTable

#[repr(C)]
pub struct ComponentVTable {
    pub visit_children_item: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, index: isize, order: TraversalOrder, visitor: VRefMut<'_, ItemVisitorVTable>) -> VisitChildrenResult,
    pub get_item_ref: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, index: usize) -> Pin<VRef<'_, ItemVTable>>,
    pub get_subtree_range: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, index: usize) -> IndexRange,
    pub get_subtree_component: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, index: usize, subindex: usize, result: &mut VWeak<ComponentVTable, Dyn>),
    pub get_item_tree: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>) -> Slice<'_, ItemTreeNode>,
    pub parent_node: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, result: &mut ItemWeak),
    pub subtree_index: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>) -> usize,
    pub layout_info: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, _: Orientation) -> LayoutInfo,
    pub accessible_role: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, item_index: usize) -> AccessibleRole,
    pub accessible_string_property: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, item_index: usize, what: AccessibleStringProperty, result: &mut SharedString),
    pub drop_in_place: unsafe extern "C" fn(_: VRefMut<'_, ComponentVTable>) -> Layout,
    pub dealloc: unsafe extern "C" fn(_: &ComponentVTable, ptr: *mut u8, layout: Layout),
}

A Component is representing an unit that is allocated together

Fields

visit_children_item: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, index: isize, order: TraversalOrder, visitor: VRefMut<'_, ItemVisitorVTable>) -> VisitChildrenResult

Visit the children of the item at index index. Note that the root item is at index 0, so passing 0 would visit the item under root (the children of root). If you want to visit the root item, you need to pass -1 as an index.

get_item_ref: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, index: usize) -> Pin<VRef<'_, ItemVTable>>

Return a reference to an item using the given index

get_subtree_range: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, index: usize) -> IndexRange

Return the range of indices below the dynamic ItemTreeNode at index

get_subtree_component: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, index: usize, subindex: usize, result: &mut VWeak<ComponentVTable, Dyn>)

Return the ComponentRc at subindex below the dynamic ItemTreeNode at index

get_item_tree: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>) -> Slice<'_, ItemTreeNode>

Return the item tree that is defined by this Component. The return value is an item weak because it can be null if there is no parent. And the return value is passed by &mut because ItemWeak has a destructor

parent_node: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, result: &mut ItemWeak)

Return the node this component is a part of in the parent component.

The return value is an item weak because it can be null if there is no parent. And the return value is passed by &mut because ItemWeak has a destructor Note that the returned value will typically point to a repeater node, which is strictly speaking not an Item at all!

subtree_index: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>) -> usize

Return the index of the current subtree or usize::MAX if this is not a subtree

layout_info: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, _: Orientation) -> LayoutInfo

Returns the layout info for this component

accessible_role: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, item_index: usize) -> AccessibleRole

Returns the accessible role for a given item

accessible_string_property: unsafe extern "C" fn(_: Pin<VRef<'_, ComponentVTable>>, item_index: usize, what: AccessibleStringProperty, result: &mut SharedString)

Returns the accessible property

drop_in_place: unsafe extern "C" fn(_: VRefMut<'_, ComponentVTable>) -> Layout

in-place destructor (for VRc)

dealloc: unsafe extern "C" fn(_: &ComponentVTable, ptr: *mut u8, layout: Layout)

dealloc function (for VRc)

Implementations

impl ComponentVTable

pub fn new<T: Component>() -> Self

Create a vtable suitable for a given type implementing the trait.

Trait Implementations

impl VTableMeta for ComponentVTable

type VTable = ComponentVTable

That’s the VTable itself (so most likely Self)

type Target = ComponentTO

That’s the trait object that implements the functions

impl VTableMetaDropInPlace for ComponentVTable

unsafe fn drop_in_place(vtable: &Self::VTable, ptr: *mut u8) -> Layout

Safety

unsafe fn dealloc(vtable: &Self::VTable, ptr: *mut u8, layout: Layout)

Safety