Updated Material 3 `Slider`

The Slider has been updated to match the Material 3 Design specifications. The Slider changes include an updated height, a gap between the active and inactive track, and a stop indicator to show the end value of the inactive track. Pressing the thumb adjusts its width, and the track adjusts its shape. The new value indicator shape is a rounded rectangle. New color mappings have also been introduced for some of the Slider shapes.

The Material 3 Design specs for the Slider were updated in December, 2023. To opt into the 2024 design spec, set the Slider.year2023 flag to false. This is done to ensure that existing apps are not affected by the updated design specifications.

The Slider widget has a year2023 flag that can be set to false to opt into the updated design spec. The default value for the year2023 flag is true, which means that the Slider uses the 2023 design specifications.

When Slider.year2023 is set to false, the slider will use the updated design specifications.

To opt into the updated design spec for the Slider, set the year2023 flag to false:

Slider(
  year2023: false,
  value: _value,
  onChanged: (value) {
    setState(() {
      _value = value;
    });
  },
),

Landed in version: v3.27.0-0.2.pre.
In stable release: Not yet

API documentation:

• Slider
• Slider.year2023

Relevant issues:

• Update Slider for Material 3 redesign

Relevant PRs:

• Introduce new Material 3 Slider shapes

除非另有说明，本文档之所提及适用于 Flutter 的最新稳定版本，本页面最后更新时间: 2024-12-02。 查看文档源码 或者 为本页面内容提出建议。