Slider

Slider edits a controlled floating-point value. Its default range is 0.0F through 1.0F.

Control value and range

Row {
  Slider(volume)
      .Range(0.0F, 100.0F)
      .Step(1.0F)
      .OnChanged([volume](float next) {
        volume = next;
      }),
  Text::Format("{}%", static_cast<int>(volume)),
}.With(
    Spacing(12.0F),
    CrossAlign(CrossAxisAlignment::Center)
)

.Range(minimum, maximum) defines the legal interval. .Step(step) snaps requested values to discrete increments. The caller must feed accepted values back into the next composition.

Interaction and accessibility

Pointer dragging, keyboard range adjustment, focus, and accessibility increment or decrement actions share the same controlled output path.

The slider exposes role, current range, optional step, enabled state, and focus semantics automatically.

Theme behavior

SliderStyle lets a theme vary track gaps, tick treatment, stop indicators, thumb geometry, colors, focus treatment, and motion without changing the controlled value contract.

API

• Constructors: Slider(float) and Slider(State<float>).
• Fluent methods: .Range(float minimum, float maximum), .Step(float).
• Event: .OnChanged(function) with float.
• Theme style: SliderStyle.

Use ProgressBar when the value is display-only.