BubbleChartPainter class

A custom painter for rendering bubble charts.

This painter handles the rendering of bubble charts where each point has x, y coordinates and a size (radius) representing a third dimension.

Inheritance

Constructors

BubbleChartPainter({required ChartTheme theme, required List<BubbleDataSet> bubbleDataSets, bool showGrid = true, bool showAxis = true, bool showLabel = true, double minBubbleSize = 5.0, double maxBubbleSize = 30.0, double animationProgress = 1.0, ChartInteractionResult? selectedBubble, ChartInteractionResult? hoveredBubble})
Creates a bubble chart painter.
const

Properties

animationProgress → double
The animation progress value between 0.0 and 1.0.
final
bubbleDataSets → List<BubbleDataSet>
The list of bubble data sets.
final
dataSets → List<ChartDataSet>
finalinherited
hashCode → int
The hash code for this object.
no setterinherited
hoveredBubble → ChartInteractionResult?
The currently hovered bubble interaction result.
final
maxBubbleSize → double
The maximum bubble size in pixels.
final
minBubbleSize → double
The minimum bubble size in pixels.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
selectedBubble → ChartInteractionResult?
The currently selected bubble interaction result.
final
semanticsBuilder → SemanticsBuilderCallback?
Returns a function that builds semantic information for the picture drawn by this painter.
no setterinherited
showAxis → bool
finalinherited
showGrid → bool
finalinherited
showLabel → bool
finalinherited
theme → ChartTheme
finalinherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be notified when it is time to repaint.
inherited
drawAxes(Canvas canvas, Size size, double minX, double maxX, double minY, double maxY) → void
Draw axes
inherited
drawAxisLabels(Canvas canvas, Size size, double minX, double maxX, double minY, double maxY) → void
Draw axis labels (optimized with text style caching)
inherited
drawGrid(Canvas canvas, Size size, double minX, double maxX, double minY, double maxY) → void
Draw grid lines (optimized with batched operations)
inherited
getDataBounds(double getValue(ChartDataPoint), double combine(double, double)) → void
Get data bounds
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 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
pointToCanvas(ChartDataPoint point, Size size, double minX, double maxX, double minY, double maxY) → Offset
Convert data point to canvas coordinates (optimized)
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
shouldRepaint(covariant BubbleChartPainter 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