Button 按钮 ​

const Button(text: "Primary", type: ButtonType.primary),
const Button(text: "Success", type: ButtonType.success),
const Button(text: "Default", type: null),
const Button(text: "Danger", type: ButtonType.danger),
const Button(text: "Warning", type: ButtonType.warning),

const Button(text: "Plain", type: ButtonType.primary, plain: true),
const Button(text: "Plain", type: ButtonType.success, plain: true),

const Button(
  text: "Disabled",
  type: ButtonType.primary,
  disabled: true,
),
const Button(
  text: "Disabled",
  type: ButtonType.success,
  disabled: true,
),

const Button(text: "Square", type: ButtonType.primary, square: true),
const Button(text: "Round", type: ButtonType.success, round: true),

const Button(
  text: "Large",
  type: ButtonType.primary,
  size: ButtonSize.large,
  block: true,
),
const Button(
  text: "Default",
  type: ButtonType.primary,
  size: null,
),
const Button(
  text: "Small",
  type: ButtonType.primary,
  size: ButtonSize.small,
),
const Button(
  text: "Mini",
  type: ButtonType.primary,
  size: ButtonSize.mini,
),