Struct Modifier 

pub struct Modifier { /* private fields */ }

A persistent handle to a modifier chain.

Implementations

impl Modifier

pub fn new() -> Self

Creates an empty modifier chain.

pub fn then(self, other: Modifier) -> Self

Appends another modifier chain after this one.

pub fn attach(self)

Attaches this modifier chain to the current component node.

pub fn run<F>(self, child: F)

where F: Fn() + Send + Sync + 'static,

Attaches this modifier chain to the current node and then runs child.

pub fn is_empty(&self) -> bool

Returns true when the modifier has no actions.

Trait Implementations

impl Clone for Modifier

fn clone(&self) -> Modifier

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl CursorModifierExt for Modifier

fn hover_cursor_icon(self, icon: CursorIcon) -> Modifier

Sets the cursor icon used while the pointer hovers this node.

impl Debug for Modifier

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Modifier

fn default() -> Modifier

Returns the “default value” for a type.

impl FocusModifierExt for Modifier

fn focusable(self) -> Modifier

Registers a focus target for this subtree.

fn focus_requester(self, requester: FocusRequester) -> Modifier

Binds an explicit focus requester to this subtree.

fn focus_properties(self, properties: FocusProperties) -> Modifier

Applies explicit focus properties to this subtree.

fn focus_group(self) -> Modifier

Registers a traversal-only focus group for this subtree.

fn focus_scope_with(self, scope: FocusScopeNode) -> Modifier

Registers an explicit focus scope handle for this subtree.

fn focus_group_with(self, group: FocusGroupNode) -> Modifier

Registers an explicit focus group handle for this subtree.

fn focus_restorer(self, fallback: Option<FocusRequester>) -> Modifier

Registers a focus scope with restore behavior for this subtree.

fn focus_restorer_with( self, scope: FocusScopeNode, fallback: Option<FocusRequester>, ) -> Modifier

Registers an explicit focus restorer scope for this subtree.

fn focus_traversal_policy(self, policy: FocusTraversalPolicy) -> Modifier

Applies a traversal policy to the current focus group or scope.

fn on_focus_changed<F>(self, handler: F) -> Modifier

where F: Into<CallbackWith<FocusState>>,

Registers a callback that runs when the subtree focus state changes.

fn on_focus_event<F>(self, handler: F) -> Modifier

where F: Into<CallbackWith<FocusState>>,

Registers a callback that observes focus events for this subtree.

fn focus_beyond_bounds_handler<F>(self, handler: F) -> Modifier

where F: Into<CallbackWith<FocusDirection, bool>>,

Registers a callback that moves focus beyond the current viewport.

fn focus_reveal_handler<F>(self, handler: F) -> Modifier

where F: Into<CallbackWith<FocusRevealRequest, bool>>,

Registers a callback that reveals the focused target within the viewport.

impl Hash for Modifier

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl ModifierCapabilityExt for Modifier

fn push_layout<N>(self, node: N) -> Self

where N: LayoutModifierNode,

Appends a layout modifier node to the current modifier chain.

fn push_draw<N>(self, node: N) -> Self

where N: DrawModifierNode,

Appends a draw modifier node to the current modifier chain.

fn push_parent_data<N>(self, node: N) -> Self

where N: ParentDataModifierNode,

Appends a parent-data modifier node to the current modifier chain.

fn push_build<N>(self, node: N) -> Self

where N: BuildModifierNode,

Appends a build modifier node to the current modifier chain.

fn push_semantics<N>(self, node: N) -> Self

where N: SemanticsModifierNode,

Appends a semantics modifier node to the current modifier chain.

fn push_pointer_preview_input<N>(self, node: N) -> Self

where N: PointerInputModifierNode,

Appends a preview pointer-input modifier node to the current modifier chain.

fn push_pointer_input<N>(self, node: N) -> Self

where N: PointerInputModifierNode,

Appends a pointer-input modifier node to the current modifier chain.

fn push_pointer_final_input<N>(self, node: N) -> Self

where N: PointerInputModifierNode,

Appends a final pointer-input modifier node to the current modifier chain.

fn push_keyboard_preview_input<N>(self, node: N) -> Self

where N: KeyboardInputModifierNode,

Appends a preview keyboard-input modifier node to the current modifier chain.

fn push_keyboard_input<N>(self, node: N) -> Self

where N: KeyboardInputModifierNode,

Appends a keyboard-input modifier node to the current modifier chain.

fn push_ime_preview_input<N>(self, node: N) -> Self

where N: ImeInputModifierNode,

Appends a preview IME-input modifier node to the current modifier chain.

fn push_ime_input<N>(self, node: N) -> Self

where N: ImeInputModifierNode,

Appends an IME-input modifier node to the current modifier chain.

impl PartialEq for Modifier

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Modifier