ChartPiePainter class

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
read / write
centerR ↔ double
read / write
centerX ↔ double
read / write
centerY ↔ double
read / write
chartBeans ↔ List<ChartPieBean>
read / write
endX ↔ double
read / write
endY ↔ double
read / write
fontColor Color
read / write
fontSize ↔ double
read / write
R ↔ double
read / write
startX ↔ double
read / write
startY ↔ double
read / write
value ↔ double
read / write
hashCode → int
The hash code for this object.
read-only, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
semanticsBuilder SemanticsBuilderCallback
Returns a function that builds semantic information for the picture drawn by this painter.
read-only, inherited

Methods

drawCenter(Canvas canvas) → void
drawPie(Canvas canvas) → dynamic
getTotal(List<ChartPieBean> data) → dynamic
计算数据总和
init(Size size) → dynamic
初始化
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
setPieAngle() → dynamic
计算各个扇形的起始角度
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
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
hitTest(Offset position) → bool
Called whenever a hit test is being performed on an object that is using this custom paint delegate.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
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
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
toString() → String
Returns a string representation of this object.
inherited

Operators

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

Constants

basePadding → const double
16
defaultColor → const Color
Colors.deepPurple