Methods
addListener (VoidCallback listener → void
Register a closure to be notified when it is time to repaint.
inherited
buildAndCachePath (String key , Path builder ()→ Path
Build (or retrieve cached) a ui.Path keyed by key.
clipToViewport (Canvas canvas , ChartViewport viewport , void body ()→ void
Clip canvas to the viewport plot area for the duration of body.
drawCrosshair (Canvas canvas , ChartViewport viewport , double cx → void
Draw a vertical crosshair line at canvas-x cx.
drawDashedLine (Canvas canvas , Offset start , Offset end , Paint paint , {double dash = 6 , double gap = 4 → void
Draw a dashed line segment with paint.
drawHorizontalCrosshair (Canvas canvas , ChartViewport viewport , double cy → void
Draw a horizontal crosshair line at canvas-y cy.
drawHorizontalGrid (Canvas canvas , ChartViewport viewport , List <double yTicks , {bool dashed = true → void
Draw horizontal grid lines across viewport for yTicks.
drawTooltip (Canvas canvas , Size canvasSize , Offset anchor , List <String lines → void
Draw a rounded-rect tooltip bubble.
drawVerticalGrid (Canvas canvas , ChartViewport viewport , List <double xPositions , {bool dashed = false → void
Draw vertical grid lines for each x category in xPositions.
drawXAxisLabels (Canvas canvas , ChartViewport viewport , List <String xLabels , List <double xPositions → void
Draw bottom X-axis labels for xLabels at xPositions.
drawXAxisLabelsRotated (Canvas canvas , ChartViewport viewport , List <String xLabels , List <double xPositions , {double angleDeg = -45 → void
Draw rotated X-axis labels (e.g., for many categories).
drawYAxisLabels (Canvas canvas , ChartViewport viewport , List <double yTicks , String formatter (double → void
Draw left Y-axis labels for yTicks.
fillPaint (Color color → Paint
fillPaintMutable (Color color → Paint
Returns a new mutable fill paint — safe to add shaders, maskFilters etc.
hitTest (Offset position → bool ?
Called whenever a hit test is being performed on an object that is using
this custom paint delegate.
inherited
invalidatePath (String key → void
invalidatePathsWithPrefix (String prefix → void
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.
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 ChartPainterBase old → bool
Subclasses should override shouldRepaintChart instead.
override
shouldRepaintChart (covariant ChartPainterBase old → bool
Return true if chart-specific state (data, selection, animation value…)
has changed. Keep this as cheap as possible — reference equality is fine.
strokePaint (Color color , double width → Paint
toString ()
→ String
A string representation of this object.
inherited
