ChartPiePainter class

饼图

Inheritance

Constructors

ChartPiePainter(List<ChartPieBean>? chartBeans, {double value = 1, double? R, double? centerR = 0, Color? centerColor = defaultColor, double fontSize = 12, Color? fontColor})

Properties

centerColor ↔ Color?
getter/setter pair
centerR ↔ double?
getter/setter pair
centerX ↔ double
getter/setter pair
centerY ↔ double
getter/setter pair
chartBeans ↔ List<ChartPieBean>?
getter/setter pair
endX ↔ double
getter/setter pair
endY ↔ double
getter/setter pair
fontColor ↔ Color?
getter/setter pair
fontSize ↔ double
getter/setter pair
hashCode → int
The hash code for this object.
no setterinherited
R ↔ double?
getter/setter pair
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
semanticsBuilder → SemanticsBuilderCallback?
Returns a function that builds semantic information for the picture drawn by this painter.
no setterinherited
startX ↔ double
getter/setter pair
startY ↔ double
getter/setter pair
value ↔ double
getter/setter pair

Methods

addListener(VoidCallback listener) → void
Register a closure to be notified when it is time to repaint.
inherited
calculateMaxMin(List<ChartBean>? chatBeans) → List<double>
计算极值 最大值,最小值
inherited
drawCenter(Canvas canvas) → void
drawPie(Canvas canvas) → void
getTotal(List<ChartPieBean> data) → dynamic
计算数据总和
hitTest(Offset position) → bool?
Called whenever a hit test is being performed on an object that is using this custom paint delegate.
inherited
init(Size size) → dynamic
初始化
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
paint(Canvas canvas, Size size) → void
Called whenever the object needs to paint. The given Canvas has its coordinate space configured such that the origin is at the top left of the box. The area of the box is the size of the size argument.
override
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that the object notifies when it is time to repaint.
inherited
setPieAngle() → dynamic
计算各个扇形的起始角度
shouldRebuildSemantics(covariant CustomPainter oldDelegate) → bool
Called whenever a new instance of the custom painter delegate class is provided to the RenderCustomPaint object, or any time that a new CustomPaint object is created with a new instance of the custom painter delegate class (which amounts to the same thing, because the latter is implemented in terms of the former).
inherited
shouldRepaint(covariant ChartPiePainter oldDelegate) → bool
Called whenever a new instance of the custom painter delegate class is provided to the RenderCustomPaint object, or any time that a new CustomPaint object is created with a new instance of the custom painter delegate class (which amounts to the same thing, because the latter is implemented in terms of the former).
override
toString() → String
A string representation of this object.
inherited

Operators

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

Constants

basePadding → const double
defaultColor → const Color