FrameTimeChart class

Draws the cost of recent frames as stacked bars: build, raster, and the remaining part of the frame span.

Everything that exceeds the frame budget is highlighted, so jank is visible at a glance. The series colors come from PerformanceTheme and default to fixed hues rather than the app ColorScheme, because this is a debug visualization where the segments have to stay distinguishable from the background and from each other.

Inheritance

Constructors

FrameTimeChart({required List<FrameMetrics> frames, required Duration? frameBudget, double height = 120, bool showScale = true, bool showLegend = true, Key? key})
Creates a chart of frames, compared against frameBudget.
const

Properties

frameBudget → Duration?
Frame budget to compare against; defaults to the newest frame's budget.
final
frames → List<FrameMetrics>
Frames to plot, oldest first.
final
hashCode → int
The hash code for this object.
no setterinherited
height → double
Height of the plot area, excluding the legend.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
showLegend → bool
Draws the legend below the chart.
final
showScale → bool
Draws the millisecond labels and the budget line.
final

Methods

build(BuildContext context) → Widget
Describes the part of the user interface represented by this widget.
override
createElement() → StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited

Operators

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