CrosshairBehavior class

This class has the properties of the crosshair behavior.

Crosshair behavior has the activation mode and line type property to set the behavior of the crosshair. It also has the property to customize the appearance.

Provide options for activation mode, line type, line color, line width, hide delay for customizing the behavior of the crosshair.

Constructors

CrosshairBehavior({ActivationMode activationMode = ActivationMode.longPress, CrosshairLineType lineType = CrosshairLineType.both, List<double>? lineDashArray, bool enable = false, Color? lineColor, double lineWidth = 1, bool shouldAlwaysShow = false, double hideDelay = 0})

Creating an argument constructor of CrosshairBehavior class.

Properties

activationMode → ActivationMode

Gesture for activating the crosshair.

final

enable → bool

Toggles the visibility of the crosshair.

final

hashCode → int

The hash code for this object.

no setter, override

hideDelay → double

Time delay for hiding the crosshair.

final

lineColor → Color?

Color of the crosshair line.

final

lineDashArray → List<double>?

Dashes of the crosshair line.

final

lineType → CrosshairLineType

Type of crosshair line.

final

lineWidth → double

Width of the crosshair line.

final

parentBox ↔ RenderBox?

getter/setter pair, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

shouldAlwaysShow → bool

Enables or disables the crosshair.

final

Methods

drawHorizontalAxisLine(PaintingContext context, Offset offset, List<double>? dashArray, Paint paint) → void

Override this method to customize the horizontal line drawing and styling.

drawHorizontalAxisTooltip(PaintingContext context, Offset position, String text, TextStyle style, [Path? path, Paint? fillPaint, Paint? strokePaint]) → void

Override this method to customize the horizontal axis tooltip with styling and it's position.

drawVerticalAxisLine(PaintingContext context, Offset offset, List<double>? dashArray, Paint paint) → void

Override this method to customize the vertical line drawing and styling.

drawVerticalAxisTooltip(PaintingContext context, Offset position, String text, TextStyle style, [Path? path, Paint? fillPaint, Paint? strokePaint]) → void

Override this method to customize the vertical axis tooltip with styling and it's position.

handleDoubleTap(Offset position) → void

Called when pointer tap has contacted the screen double time in behavior.

handleEvent(PointerEvent event, BoxHitTestEntry entry) → void

To customize the necessary pointer events in behaviors. (e.g., CrosshairBehavior, TrackballBehavior, ZoomingBehavior).

handleLongPressEnd(LongPressEndDetails details) → void

Called when the pointer stops contacting the screen after a long-press by a primary button in behavior.

handleLongPressMoveUpdate(LongPressMoveUpdateDetails details) → void

Called when moving after the long press gesture by a primary button is recognized in behavior.

handleLongPressStart(LongPressStartDetails details) → void

Called when a long press gesture by a primary button has been recognized in behavior.

handlePointerEnter(PointerEnterEvent details) → void

Called when a pointer or mouse enter on the screen.

handlePointerExit(PointerExitEvent details) → void

Called when a pointer or mouse exit on the screen.

handleScaleEnd(ScaleEndDetails details) → void

Called when the pointers are no longer in contact with the screen.

inherited

handleScaleStart(ScaleStartDetails details) → void

Called when the pointers in contact with the screen and initial scale of 1.0.

inherited

handleScaleUpdate(ScaleUpdateDetails details) → void

Called when the pointers in contact with the screen have indicated a new scale.

inherited

handleTapDown(TapDownDetails details) → void

Called when the pointer tap has contacted the screen in behavior.

handleTapUp(TapUpDetails details) → void

Called when pointer has stopped contacting screen in behavior.

hide() → void

Hides the crosshair if it is displayed.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onPaint(PaintingContext context, Offset offset, SfChartThemeData chartThemeData, ThemeData themeData) → void

Override this method to customize the crosshair tooltips & line rendering.

show(dynamic x, double y, [String coordinateUnit = 'point']) → void

Displays the crosshair at the specified x and y-positions.

showByIndex(int pointIndex) → void

Displays the crosshair at the specified point index.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

override