ZoomPanBehavior class

Customizes the zooming options.

Customize the various zooming actions such as tap zooming, selection zooming, zoom pinch. In selection zooming, you can long-press and drag to select a range on the chart to be zoomed in and also you can customize the selection zooming rectangle using selectionRectBorderWidth, selectionRectBorderColor and selectionRectColor properties.

Pinch zooming can be performed by moving two fingers over the chart. Default mode is ZoomMode.xy. Zooming will be stopped after reaching maximumZoomLevel.

Note: This is only applicable for SfCartesianChart.

Constructors

ZoomPanBehavior({bool enablePinching = false, bool enableDoubleTapZooming = false, bool enablePanning = false, bool enableSelectionZooming = false, bool enableMouseWheelZooming = false, ZoomMode zoomMode = ZoomMode.xy, double maximumZoomLevel = 0.01, double selectionRectBorderWidth = 1, Color? selectionRectBorderColor, Color? selectionRectColor})

Creating an argument constructor of ZoomPanBehavior class.

Properties

enableDoubleTapZooming → bool

Enables or disables the double tap zooming.

final

enableMouseWheelZooming → bool

Enables or disables the mouseWheelZooming.

final

enablePanning → bool

Enables or disables the panning.

final

enablePinching → bool

Enables or disables the pinch zooming.

final

enableSelectionZooming → bool

Enables or disables the selection zooming.

final

hashCode → int

The hash code for this object.

no setter, override

maximumZoomLevel → double

Maximum zoom level.

final

parentBox ↔ RenderBox?

getter/setter pair, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

selectionRectBorderColor → Color?

Border color of the selection zooming rectangle.

final

selectionRectBorderWidth → double

Border width of the selection zooming rectangle.

final

selectionRectColor → Color?

Color of the selection zooming rectangle.

final

zoomMode → ZoomMode

By default, both the x and y-axes in the chart can be zoomed.

final

Methods

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).

handleHorizontalDragEnd(DragEndDetails details) → void

handleHorizontalDragStart(DragStartDetails details) → void

handleHorizontalDragUpdate(DragUpdateDetails details) → void

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.

inherited

handlePointerExit(PointerExitEvent details) → void

Called when a pointer or mouse exit on the screen.

inherited

handleScaleEnd(ScaleEndDetails details) → void

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

handleScaleStart(ScaleStartDetails details) → void

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

handleScaleUpdate(ScaleUpdateDetails details) → void

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

handleTapDown(TapDownDetails details) → void

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

inherited

handleTapUp(TapUpDetails details) → void

Called when pointer has stopped contacting screen in behavior.

inherited

handleVerticalDragEnd(DragEndDetails details) → void

handleVerticalDragStart(DragStartDetails details) → void

handleVerticalDragUpdate(DragUpdateDetails details) → void

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

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

Called to customize each behaviors with given context at the given offset.

panToDirection(String direction) → void

Pans the plot area for given left, right, top, and bottom directions.

reset() → void

Returns the plot area back to its original position after zooming.

toString() → String

A string representation of this object.

inherited

zoomByFactor(double zoomFactor) → void

Changes the zoom level using zoom factor.

zoomByRect(Rect rect) → void

Zooms the chart for a given rectangle value.

zoomIn() → void

Increases the magnification of the plot area.

zoomOut() → void

Decreases the magnification of the plot area.

zoomToSingleAxis(ChartAxis axis, double zoomPosition, double zoomFactor) → void

Change the zoom level of an appropriate axis.

Operators

operator ==(Object other) → bool

The equality operator.

override