Struct TextFieldModifierNode 

pub struct TextFieldModifierNode { /* private fields */ }

Modifier node for editable text fields.

This node is the core of BasicTextField, handling:

• Text measurement and layout
• Cursor and selection rendering
• Pointer input for cursor positioning

Implementations

impl TextFieldModifierNode

pub fn new(state: TextFieldState) -> Self

Creates a new text field modifier node.

pub fn with_line_limits(self, line_limits: TextFieldLineLimits) -> Self

Creates a node with custom line limits.

pub fn line_limits(&self) -> TextFieldLineLimits

Returns the current line limits configuration.

pub fn with_cursor_color(self, color: Color) -> Self

Creates a node with custom cursor color.

pub fn set_focused(&mut self, focused: bool)

Sets the focus state.

pub fn is_focused(&self) -> bool

Returns whether the field is focused.

pub fn is_focused_rc(&self) -> Rc<RefCell<bool>>

Returns the is_focused Rc for closure capture.

pub fn content_offset_rc(&self) -> Rc<Cell<f32>>

Returns the content_offset Rc for closure capture.

pub fn content_y_offset_rc(&self) -> Rc<Cell<f32>>

Returns the content_y_offset Rc for closure capture.

pub fn text(&self) -> String

Returns the current text.

pub fn selection(&self) -> TextRange

Returns the current selection.

pub fn cursor_brush(&self) -> Brush

Returns the cursor brush for rendering.

pub fn selection_brush(&self) -> Brush

Returns the selection brush for rendering selection highlight.

pub fn insert_text(&mut self, text: &str)

Inserts text at the current cursor position (for paste operations).

pub fn copy_selection(&self) -> Option<String>

Copies the selected text and returns it (for web copy operation). Returns None if no selection.

pub fn cut_selection(&mut self) -> Option<String>

Cuts the selected text: copies and deletes it. Returns the cut text, or None if no selection.

pub fn get_state(&self) -> TextFieldState

Returns a clone of the text field state for use in draw closures. This allows reading selection at DRAW time rather than LAYOUT time.

pub fn set_content_offset(&self, offset: f32)

Updates the content offset (padding.left) for accurate click-to-position cursor placement. Called from slices collection where padding is known.

pub fn set_content_y_offset(&self, offset: f32)

Updates the content Y offset (padding.top) for cursor Y positioning. Called from slices collection where padding is known.

pub fn position_cursor_at_offset(&self, x_offset: f32)

Positions cursor at a given x offset within the text. Uses proper text layout hit testing for accurate proportional font support.

Trait Implementations

impl Debug for TextFieldModifierNode

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

Formats the value using the given formatter.

impl DelegatableNode for TextFieldModifierNode

fn node_state(&self) -> &NodeState

fn aggregate_child_capabilities(&self) -> NodeCapabilities

impl DrawModifierNode for TextFieldModifierNode

fn draw(&self, _draw_scope: &mut dyn DrawScope)

Draws this modifier node into the provided DrawScope.

fn create_draw_closure(&self) -> Option<Rc<dyn Fn(Size) -> Vec<DrawPrimitive>>>

Creates a closure for deferred drawing that will be evaluated at render time.

impl LayoutModifierNode for TextFieldModifierNode

fn measure( &self, _context: &mut dyn ModifierNodeContext, _measurable: &dyn Measurable, constraints: Constraints, ) -> LayoutModifierMeasureResult

Measures the wrapped content and returns both the size this modifier occupies and where the wrapped content should be placed.

fn min_intrinsic_width(&self, _measurable: &dyn Measurable, _height: f32) -> f32

Returns the minimum intrinsic width of this modifier node.

fn max_intrinsic_width(&self, _measurable: &dyn Measurable, _height: f32) -> f32

Returns the maximum intrinsic width of this modifier node.

fn min_intrinsic_height(&self, _measurable: &dyn Measurable, _width: f32) -> f32

Returns the minimum intrinsic height of this modifier node.

fn max_intrinsic_height(&self, _measurable: &dyn Measurable, _width: f32) -> f32

Returns the maximum intrinsic height of this modifier node.

fn create_measurement_proxy(&self) -> Option<Box<dyn MeasurementProxy>>

Creates a measurement proxy for this node that can perform measurement without holding a borrow to the modifier chain.

impl ModifierNode for TextFieldModifierNode

fn on_attach(&mut self, context: &mut dyn ModifierNodeContext)

fn as_draw_node(&self) -> Option<&dyn DrawModifierNode>

Returns this node as a draw modifier if it implements the trait.

fn as_draw_node_mut(&mut self) -> Option<&mut dyn DrawModifierNode>

Returns this node as a mutable draw modifier if it implements the trait.

fn as_layout_node(&self) -> Option<&dyn LayoutModifierNode>

Returns this node as a layout modifier if it implements the trait.

fn as_layout_node_mut(&mut self) -> Option<&mut dyn LayoutModifierNode>

Returns this node as a mutable layout modifier if it implements the trait.

fn as_semantics_node(&self) -> Option<&dyn SemanticsNode>

Returns this node as a semantics modifier if it implements the trait.

fn as_semantics_node_mut(&mut self) -> Option<&mut dyn SemanticsNode>

Returns this node as a mutable semantics modifier if it implements the trait.

fn as_pointer_input_node(&self) -> Option<&dyn PointerInputNode>

Returns this node as a pointer-input modifier if it implements the trait.

fn as_pointer_input_node_mut(&mut self) -> Option<&mut dyn PointerInputNode>

Returns this node as a mutable pointer-input modifier if it implements the trait.

fn on_detach(&mut self)

fn on_reset(&mut self)

fn as_focus_node(&self) -> Option<&(dyn FocusNode + 'static)>

Returns this node as a focus modifier if it implements the trait.

fn as_focus_node_mut(&mut self) -> Option<&mut (dyn FocusNode + 'static)>

Returns this node as a mutable focus modifier if it implements the trait.

fn for_each_delegate<'b>( &'b self, _visitor: &mut dyn FnMut(&'b (dyn ModifierNode + 'static)), )

Visits every delegate node owned by this modifier.

fn for_each_delegate_mut<'b>( &'b mut self, _visitor: &mut dyn FnMut(&'b mut (dyn ModifierNode + 'static)), )

Visits every delegate node mutably.

impl PointerInputNode for TextFieldModifierNode

fn on_pointer_event( &mut self, _context: &mut dyn ModifierNodeContext, _event: &PointerEvent, ) -> bool

Called when a pointer event occurs within the bounds of this node. Returns true if the event was consumed and should not propagate further.

fn hit_test(&self, x: f32, y: f32) -> bool

Returns true if this node should participate in hit-testing for the given pointer position.

fn pointer_input_handler(&self) -> Option<Rc<dyn Fn(PointerEvent)>>

Returns an event handler closure if the node wants to participate in pointer dispatch.

impl SemanticsNode for TextFieldModifierNode

fn merge_semantics(&self, config: &mut SemanticsConfiguration)

Merges semantic properties into the provided configuration.