Struct ItemTreeVTable 

#[repr(C)]
pub struct ItemTreeVTable {

    pub visit_children_item: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, index: isize, order: TraversalOrder, visitor: VRefMut<'_, ItemVisitorVTable>) -> VisitChildrenResult,
    pub get_item_ref: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, index: u32) -> Pin<VRef<'_, ItemVTable>>,
    pub get_subtree_range: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, index: u32) -> IndexRange,
    pub get_subtree: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, index: u32, subindex: usize, result: &mut VWeak<ItemTreeVTable, Dyn>),
    pub get_item_tree: unsafe fn(Pin<VRef<'_, ItemTreeVTable>>) -> Slice<'_, ItemTreeNode>,
    pub parent_node: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, result: &mut ItemWeak),
    pub embed_component: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, parent: &VWeak<ItemTreeVTable>, parent_item_tree_index: u32) -> bool,
    pub subtree_index: unsafe fn(Pin<VRef<'_, ItemTreeVTable>>) -> usize,
    pub layout_info: unsafe fn(Pin<VRef<'_, ItemTreeVTable>>, Orientation) -> LayoutInfo,
    pub item_geometry: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32) -> LogicalRect,
    pub accessible_role: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32) -> AccessibleRole,
    pub accessible_string_property: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32, what: AccessibleStringProperty, result: &mut SharedString) -> bool,
    pub accessibility_action: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32, action: &AccessibilityAction),
    pub supported_accessibility_actions: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32) -> SupportedAccessibilityAction,
    pub item_element_infos: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32, result: &mut SharedString) -> bool,
    pub window_adapter: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, do_create: bool, result: &mut Option<WindowAdapterRc>),
    pub drop_in_place: unsafe fn(VRefMut<'_, ItemTreeVTable>) -> Layout,
    pub dealloc: unsafe fn(_: &ItemTreeVTable, ptr: *mut u8, layout: Layout),
}

A ItemTree is representing an unit that is allocated together

Fields

visit_children_item: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, 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 fn(_: Pin<VRef<'_, ItemTreeVTable>>, index: u32) -> Pin<VRef<'_, ItemVTable>>

Return a reference to an item using the given index

get_subtree_range: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, index: u32) -> IndexRange

Return the range of indices below the dynamic ItemTreeNode at index

get_subtree: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, index: u32, subindex: usize, result: &mut VWeak<ItemTreeVTable, Dyn>)

Return the ItemTreeRc at subindex below the dynamic ItemTreeNode at index

get_item_tree: unsafe fn(Pin<VRef<'_, ItemTreeVTable>>) -> Slice<'_, ItemTreeNode>

Return the item tree that is defined by this ItemTree.

parent_node: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, result: &mut ItemWeak)

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

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!

embed_component: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, parent: &VWeak<ItemTreeVTable>, parent_item_tree_index: u32) -> bool

This embeds this ItemTree into the item tree of another ItemTree

Returns true if this ItemTree was embedded into the parent at parent_item_tree_index.

subtree_index: unsafe fn(Pin<VRef<'_, ItemTreeVTable>>) -> usize

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

layout_info: unsafe fn(Pin<VRef<'_, ItemTreeVTable>>, Orientation) -> LayoutInfo

Returns the layout info for the root of the ItemTree

item_geometry: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32) -> LogicalRect

Returns the item’s geometry (relative to its parent item)

accessible_role: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32) -> AccessibleRole

Returns the accessible role for a given item

accessible_string_property: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32, what: AccessibleStringProperty, result: &mut SharedString) -> bool

Returns the accessible property via the result. Returns true if such a property exists.

accessibility_action: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32, action: &AccessibilityAction)

Executes an accessibility action.

supported_accessibility_actions: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32) -> SupportedAccessibilityAction

Returns the supported accessibility actions.

item_element_infos: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, item_index: u32, result: &mut SharedString) -> bool

Add the ElementName::id entries of the given item

window_adapter: unsafe fn(_: Pin<VRef<'_, ItemTreeVTable>>, do_create: bool, result: &mut Option<WindowAdapterRc>)

Returns a Window, creating a fresh one if do_create is true.

drop_in_place: unsafe fn(VRefMut<'_, ItemTreeVTable>) -> Layout

in-place destructor (for VRc)

dealloc: unsafe fn(_: &ItemTreeVTable, ptr: *mut u8, layout: Layout)

dealloc function (for VRc)

Implementations

impl ItemTreeVTable

pub fn new<T: ItemTree>() -> Self

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

Trait Implementations

impl VTableMeta for ItemTreeVTable

type VTable = ItemTreeVTable

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

type Target = ItemTreeTO

That’s the trait object that implements the functions

impl VTableMetaDropInPlace for ItemTreeVTable

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