FModalSheetStyleDelta.delta constructor

const FModalSheetStyleDelta.delta({ ImageFilter barrierFilter(BuildContext context, double animation)?, FModalSheetMotionDelta? motion, double? flingVelocity, double? closeProgressThreshold, })

Creates a partial modification of a FModalSheetStyle.

Parameters

• FModalSheetStyle.barrierFilter - An optional callback that takes a BuildContext and the current animation transition value (0.0 to 1.0), and returns an ImageFilter that is used as the barrier. Defaults to null.

Prefer a static function over a closure literal. A closure literal is never equal to another, which causes widgets to flicker when the same theme is recreated.

Examples

// Blurred
(context, animation) => ImageFilter.blur(sigmaX: animation * 5, sigmaY: animation * 5);

// Solid color
(context, animation) => ColorFilter.mode(Colors.white.withValues(alpha: animation), BlendMode.srcOver);

// Tinted
(context, animation) => ColorFilter.mode(
  context.theme.colors.barrier.withValues(alpha: animation * 0.5),
  BlendMode.srcOver,
);

// Blurred & tinted
(context, animation) => ImageFilter.compose(
  outer: ImageFilter.blur(sigmaX: animation * 5, sigmaY: animation * 5),
  inner: ColorFilter.mode(Colors.white.withValues(alpha: animation * 0.5), BlendMode.srcOver),
);

• FModalSheetStyle.motion - The motion-related properties for a modal sheet.
• FModalSheetStyle.flingVelocity - The minimum velocity to initiate a fling.
• FModalSheetStyle.closeProgressThreshold - The threshold for determining whether the sheet is closing.

Implementation

const factory FModalSheetStyleDelta.delta({
  ImageFilter Function(BuildContext, double)? barrierFilter,
  FModalSheetMotionDelta? motion,
  double? flingVelocity,
  double? closeProgressThreshold,
}) = _FModalSheetStyleDelta;