Watermark class

A widget that renders a visible watermark overlay on top of its child.

The watermark tiles text (e.g. user ID, email, timestamp) across the entire child area. Useful for deterring screenshots and tracing leaks.

The overlay is rendered with IgnorePointer so it does not intercept touch events, and wrapped in a RepaintBoundary to isolate repaints.

Watermark(
  text: 'user@example.com  2026-02-15',
  style: const WatermarkStyle(opacity: 0.2, rotate: -45),
  child: MyProtectedContent(),
)

Inheritance

Constructors

Watermark({Key? key, required String text, WatermarkStyle style = const WatermarkStyle(), bool enabled = true, required Widget child}): Creates a watermark overlay over child.
const

child → Widget: The content to display beneath the watermark.
final
enabled → bool: Whether the watermark overlay is visible.
final
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
style → WatermarkStyle: The visual style configuration for the watermark.
final
text → String: The text to display as the watermark (e.g. user ID, email, timestamp).
final

build(BuildContext context) → Widget: Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement: Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>: Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void: Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode: Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String: A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String: Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String: Returns a one-line detailed description of the object.
inherited
toStringShort() → String: A short, textual description of this widget.
inherited