Struct i_slint_core::item_tree::ItemVisitorVTable

#[repr(C)]
pub struct ItemVisitorVTable {
    pub visit_item: unsafe extern "C" fn(_: VRefMut<'_, ItemVisitorVTable>, item_tree: &VRc<ItemTreeVTable, Dyn>, index: u32, item: Pin<VRef<'_, ItemVTable>>) -> VisitChildrenResult,
    pub drop: unsafe extern "C" fn(_: VRefMut<'_, ItemVisitorVTable>),
}

Object to be passed in visit_item_children method of the ItemTree.

Fields

visit_item: unsafe extern "C" fn(_: VRefMut<'_, ItemVisitorVTable>, item_tree: &VRc<ItemTreeVTable, Dyn>, index: u32, item: Pin<VRef<'_, ItemVTable>>) -> VisitChildrenResult

Called for each child of the visited item

The item_tree parameter is the ItemTree in which the item live which might not be the same as the parent’s ItemTree. index is to be used again in the visit_item_children function of the ItemTree (the one passed as parameter) and item is a reference to the item itself

drop: unsafe extern "C" fn(_: VRefMut<'_, ItemVisitorVTable>)

Destructor

Implementations

impl ItemVisitorVTable

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

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

Trait Implementations

impl VTableMeta for ItemVisitorVTable

type VTable = ItemVisitorVTable

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

type Target = ItemVisitorTO

That’s the trait object that implements the functions

impl VTableMetaDrop for ItemVisitorVTable

unsafe fn drop(ptr: *mut ItemVisitorTO)

Safety

fn new_box<X: HasStaticVTable<ItemVisitorVTable>>( value: X ) -> VBox<ItemVisitorVTable>

allocate a new VBox