BarChartPainter class - bar_chart library

Constructors

BarChartPainter(List<DataItem> dataset, BuildContext context, {required Animation<double> animation, String title = '', required List<Color> customColors, Color? backGroundColor, bool showTitle = true, bool showLabels = true, bool showLegend = true, bool showLines = true, required Function onTap}): Creates a BarChartPainter.

Properties

animation → Animation<double>: Animation driving the entry of the bars.
final
backGroundColor → Color?: Optional background color (currently used by the chart container).
final
context → BuildContext: Build context used for theming and tap detection.
final
customColors → List<Color>: Fallback color palette for bars.
final
dataset → List<DataItem>: Dataset used to render the chart.
final
hashCode → int: The hash code for this object.
no setterinherited
onTap → Function: Tap callback triggered when a bar is tapped.
final
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
showLabels → bool: Whether to show rotated labels for each bar.
final
showLegend → bool: Whether to show the legend below the chart.
final
showLines → bool: Whether to draw horizontal grid lines.
final
showTitle → bool: Whether to show the title.
final
title → String: Title displayed at the top of the chart.
final

Methods

addListener(VoidCallback listener) → void: Register a closure to be notified when it is time to repaint.
inherited
drawBars(TouchyCanvas touchyCanvas, Paint paint, Size size, double barWidth, double maxHeight, List<DataItem> dataset, DataItem greaterDataset, double t, List<Color> palette) → void: Draws the chart bars and wires up tap handling.
drawLabel(Canvas canvas, Size size, double barWidth, double maxHeight, List<DataItem> dataset, DataItem greaterDataset, double t, List<Color> palette) → void: Draws rotated labels near each bar.
drawLegend(Canvas canvas, Size size, List<DataItem> dataset, double t, List<Color> palette) → void: Draws the legend below the chart.
drawLines(Canvas canvas, Size size, double maxHeight) → void: Draws the main axis line and grid lines.
drawTitle(Canvas canvas, Size size) → void: Draws the chart title.
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
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 CustomPainter oldDelegate) → bool: Returns whether this painter should repaint.
override
toString() → String: A string representation of this object.
inherited

Operators

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