PickerNode

Namespace: Hex1b

Assembly: Hex1b.dll

Render node for PickerWidget. Manages the picker's selection state and popup display.

public sealed class PickerNode : Hex1bNode

Inheritance

Object → Hex1bNode → PickerNode

Properties

ContentChild

The reconciled content child node. This is the root of the widget tree built by the picker widget.

Returns: Hex1bNode

public Hex1bNode? ContentChild { get; set; }

IsFocusable

Picker nodes are NOT themselves focusable - focus passes through to children.

Returns: Boolean

public override bool IsFocusable { get; }

IsFocused

Focus state exists on the content child, not the picker node itself.

Returns: Boolean

public override bool IsFocused { get; set; }

Items

The list of items available for selection.

Returns: IReadOnlyList<String>

public IReadOnlyList<string> Items { get; set; }

SelectedIndex

The index of the currently selected item. This value is owned by the node and preserved across reconciliation.

Returns: Int32

public int SelectedIndex { get; set; }

SelectedText

Gets the text of the currently selected item, or empty string if no items.

Returns: String

public string SelectedText { get; }

SelectionChangedAction

Callback invoked when selection changes.

Returns: Func<InputBindingActionContext, Task>

public Func<InputBindingActionContext, Task>? SelectionChangedAction { get; set; }

Methods

ArrangeCore(Rect)

Override this method to implement arranging logic for this node. The base implementation saves previous bounds, marks dirty on change, and sets bounds.

Parameters:

• rect (Rect):

protected override void ArrangeCore(Rect rect)

GetChildren()

Gets the direct children of this node. Used for input routing and tree traversal. Container nodes should override this to return their children.

Returns: IEnumerable<Hex1bNode>

public override IEnumerable<Hex1bNode> GetChildren()

GetFocusableNodes()

Gets all focusable nodes in this subtree (including this node if focusable).

Returns: IEnumerable<Hex1bNode>

public override IEnumerable<Hex1bNode> GetFocusableNodes()

MeasureCore(Constraints)

Override this method to implement measuring logic for this node.

Parameters:

• constraints (Constraints):

Returns: Size

protected override Size MeasureCore(Constraints constraints)

Render(Hex1bRenderContext)

Renders the node to the given context.

Parameters:

• context (Hex1bRenderContext):

public override void Render(Hex1bRenderContext context)

SelectItemAsync(int, InputBindingActionContext)

Selects an item by index and dismisses the popup.

Parameters:

• index (Int32):
• context (InputBindingActionContext):

Returns: Task

public Task SelectItemAsync(int index, InputBindingActionContext context)