Struct ItemVTable 

#[repr(C)]
pub struct ItemVTable {
    pub init: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, my_item: &ItemRc),
    pub cached_rendering_data_offset: usize,
    pub layout_info: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, orientation: Orientation, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> LayoutInfo,
    pub input_event_filter_before_children: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &MouseEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> InputEventFilterResult,
    pub input_event: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &MouseEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> InputEventResult,
    pub focus_event: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &FocusEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> FocusEventResult,
    pub capture_key_event: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &KeyEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> KeyEventResult,
    pub key_event: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &KeyEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> KeyEventResult,
    pub render: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, backend: &mut &'_ mut dyn ItemRenderer, self_rc: &ItemRc, size: LogicalSize) -> RenderingResult,
    pub bounding_rect: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, window_adapter: &WindowAdapterRc, self_rc: &ItemRc, geometry: LogicalRect) -> LogicalRect,
    pub clips_children: unsafe fn(Pin<VRef<'_, ItemVTable>>) -> bool,
}

Items are the nodes in the render tree.

Fields

init: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, my_item: &ItemRc)

This function is called by the run-time after the memory for the item has been allocated and initialized. It will be called before any user specified bindings are set.

cached_rendering_data_offset: usize

offset in bytes from the *const ItemImpl. isize::MAX means None

layout_info: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, orientation: Orientation, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> LayoutInfo

We would need max/min/preferred size, and all layout info

input_event_filter_before_children: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &MouseEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> InputEventFilterResult

Event handler for mouse and touch event. This function is called before being called on children. Then, depending on the return value, it is called for the children, and their children, then Self::input_event is called on the children, and finally Self::input_event is called on this item again.

input_event: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &MouseEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> InputEventResult

Handle input event for mouse and touch event

focus_event: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &FocusEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> FocusEventResult

capture_key_event: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &KeyEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> KeyEventResult

Called on the parents of the focused item, allowing for global shortcuts and similar overrides of the default actions.

key_event: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, _: &KeyEvent, window_adapter: &WindowAdapterRc, self_rc: &ItemRc) -> KeyEventResult

render: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, backend: &mut &'_ mut dyn ItemRenderer, self_rc: &ItemRc, size: LogicalSize) -> RenderingResult

bounding_rect: unsafe fn(_: Pin<VRef<'_, ItemVTable>>, window_adapter: &WindowAdapterRc, self_rc: &ItemRc, geometry: LogicalRect) -> LogicalRect

clips_children: unsafe fn(Pin<VRef<'_, ItemVTable>>) -> bool

Implementations

impl ItemVTable

pub fn new<T: Item + ItemConsts>() -> Self

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

Trait Implementations

impl HasStaticVTable<ItemVTable> for BasicBorderRectangle

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for BorderRectangle

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for BoxShadow

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for Clip

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for ClippedImage

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for ComplexText

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for ComponentContainer

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for ContextMenu

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for DragArea

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for DropArea

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for Empty

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for Flickable

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for FocusScope

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for ImageItem

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for Layer

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for MenuItem

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for Opacity

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for Path

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for Rectangle

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for Rotate

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for SimpleText

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for SwipeGestureHandler

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for TextInput

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for TouchArea

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl HasStaticVTable<ItemVTable> for WindowItem

fn static_vtable() -> &'static ItemVTable

Safety: must be a valid VTable for Self

impl VTableMeta for ItemVTable

type VTable = ItemVTable

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

type Target = ItemTO

That’s the trait object that implements the functions