QuadAnnotation class

四边形注释类，用于存储和操作四个顶点坐标 替代List<Offset>以提高代码严谨性，防止意外增删顶点

Constructors

QuadAnnotation({required Point<double> topLeft, required Point<double> topRight, required Point<double> bottomLeft, required Point<double> bottomRight})

构造函数

QuadAnnotation.defaultRectangle({required Size containerSize, double padding = 10.0})

创建默认矩形（基于给定尺寸和内边距）

factory

QuadAnnotation.fromRectangleFeature(RectangleFeature rect)

从RectangleFeature创建QuadAnnotation

factory

QuadAnnotation.fromVertices(List<Point<double>> vertices)

从顶点列表创建四边形注释 顶点顺序：左上, 右上, 右下, 左下

factory

Properties

bottomLeft ↔ Point<double>

左下角顶点

getter/setter pair

bottomRight ↔ Point<double>

右下角顶点

getter/setter pair

bounds → Rect

获取边界矩形

no setter

hasError → bool

获取当前错误状态

no setter

hashCode → int

The hash code for this object.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

topLeft ↔ Point<double>

左上角顶点

getter/setter pair

topRight ↔ Point<double>

右上角顶点

getter/setter pair

vertices → List<Point<double>>

转换为顶点列表 返回顺序：左上, 右上, 右下, 左下

no setter

Methods

copy() → QuadAnnotation

复制当前矩形特征

getVertex(int index) → Point<double>

根据索引获取顶点

insetBy({required double dx, required double dy}) → QuadAnnotation

生成一个扩大/缩小边距的矩形框 dx > 0, dy > 0 表示向内缩小 dx < 0, dy < 0 表示向外扩大

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

offsetBy({required double dx, required double dy}) → QuadAnnotation

矩形偏移

setVertex(int index, Point<double> vertex) → void

根据索引设置顶点

toRectangleFeature() → RectangleFeature

转换为RectangleFeature

toString() → String

A string representation of this object.

override

validateQuadrilateral() → bool

检查四边形是否正确 (convex/concave/complex quadrilateral) 更新内部错误状态并返回是否正确

Operators

operator ==(Object other) → bool

相等性比较

override