WatermarkComponent class

水印组件：一层透明覆盖层，在其上以指定角度平铺绘制文字。

  • 默认不拦截手势（内部包裹了 IgnorePointer）。
  • 适合放在 Stack 的顶部，例如： Positioned.fill(child: WatermarkComponent(text: 'xxx'))
Inheritance

Constructors

WatermarkComponent({Key? key, String? text, List<String>? texts, TextStyle? textStyle, Color color = Colors.black, double opacity = 0.08, double rotation = -20 * math.pi / 180, double horizontalSpacing = 120, double verticalSpacing = 80, int maxPaintCount = 800, Offset textOffset = Offset.zero, bool enabled = true, TextDirection? textDirection, bool computeInBackground = true})
const

Properties

color → Color
水印颜色（默认取 Colors.black）。
final
computeInBackground → bool
是否将“网格点位计算”放到后台 isolate 执行。
final
enabled → bool
是否启用（禁用时渲染空占位）。
final
hashCode → int
The hash code for this object.
no setterinherited
horizontalSpacing → double
水平间距（像素），决定水印密度。
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
maxPaintCount → int
最大绘制数量（用于性能兜底，避免过密导致卡顿/ANR）。
final
opacity → double
透明度（0~1）。
final
rotation → double
旋转角度（弧度），默认 -20°。
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
text → String?
单条水印文本。
final
textDirection → TextDirection?
文字方向（默认从 Directionality 读取）。
final
textOffset → Offset
每个水印块内文字的额外偏移（像素）。
final
texts → List<String>?
多条水印文本，会在平铺时循环使用。
final
textStyle → TextStyle?
文字样式（会与 color/opacity 一起生效）。
final
verticalSpacing → double
垂直间距（像素），决定水印密度。
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<WatermarkComponent>
Creates the mutable state for this widget at a given location in the tree.
override
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

Operators

operator ==(Object other) → bool
The equality operator.
inherited