BetterInteractiveViewerBase class abstract

A Base Class to build InteractiveViewer like widgets, with support for scrollbars, tap to zoom, better viewport sizing, etc.

Inheritance
Implementers

Constructors

BetterInteractiveViewerBase({Key? key, bool allowNonCoveringScreenZoom = true, PanAxis panAxis = PanAxis.free, double maxScale = 2.5, double minScale = 0.2, double interactionEndFrictionCoefficient = _kDrag, bool panEnabled = true, bool scaleEnabled = true, bool showScrollbars = true, bool noMouseDragScroll = true, double scaleFactor = kDefaultMouseScrollToScaleFactor, TransformationController? transformationController, bool doubleTapToZoom = true})

Properties

allowNonCoveringScreenZoom → bool
Allows the user to zoom out the child so that it is displayed smaller than the viewports width and height.
final
doubleTapToZoom → bool
Allows the user to zoom by double tapping.
final
hashCode → int
The hash code for this object.
no setterinherited
interactionEndFrictionCoefficient → double
Changes the deceleration behavior after a gesture.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
maxScale → double
The maximum allowed scale.
final
minScale → double
The minimum allowed scale.
final
noMouseDragScroll → bool
When true, disables drag scrolling with the mouse. Only mouse wheel zooming, and when enabled scrollbar zooming, is allowed then.
final
panAxis → PanAxis
When set to PanAxis.aligned, panning is only allowed in the horizontal axis or the vertical axis, diagonal panning is not allowed.
final
panEnabled → bool
If false, the user will be prevented from panning.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
scaleEnabled → bool
If false, the user will be prevented from scaling.
final
scaleFactor → double
Determines the amount of scale to be performed per pointer scroll.
final
showScrollbars → bool
Whether to show scrollbars.
final
transformationController → TransformationController?
A TransformationController for the transformation performed on the child.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → BetterInteractiveViewerBaseState<BetterInteractiveViewerBase>
Creates the mutable state for this widget at a given location in the tree.
override
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

Static Methods

getAxisAlignedBoundingBox(Quad quad) → Quad
Given a quad, return its axis aligned bounding box.
getNearestPointInside(Vector3 point, Quad quad) → Vector3
Get the point inside (inclusively) the given Quad that is nearest to the given Vector3.
getNearestPointOnLine(Vector3 point, Vector3 l1, Vector3 l2) → Vector3
Returns the closest point to the given point on the given line segment.
pointIsInside(Vector3 point, Quad quad) → bool
Returns true iff the point is inside the rectangle given by the Quad, inclusively. Algorithm from https://math.stackexchange.com/a/190373.