MatrixGestureDetector class

MatrixGestureDetector detects translation, scale and rotation gestures and combines them into Matrix4 object that can be used by Transform widget or by low level CustomPainter code. You can customize types of reported gestures by passing shouldTranslate, shouldScale and shouldRotate parameters.

Inheritance

Constructors

MatrixGestureDetector({Key? key, required MatrixGestureDetectorCallback onMatrixUpdate, required Widget child, bool shouldTranslate = true, bool shouldScale = true, bool shouldRotate = true, bool clipChild = true, Alignment? focalPointAlignment}): const

child → Widget: The child contained by this detector.
final
clipChild → bool: Whether ClipRect widget should clip child widget.
final
focalPointAlignment → Alignment?: When set, it will be used for computing a "fixed" focal point aligned relative to the size of this widget.
final
hashCode → int: The hash code for this object.
no setterinherited
key → Key?: Controls how one widget replaces another widget in the tree.
finalinherited
onMatrixUpdate → MatrixGestureDetectorCallback: Matrix4 change notification callback
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
shouldRotate → bool: Whether to detect rotation gestures during the event processing.
final
shouldScale → bool: Whether to detect scale gestures during the event processing.
final
shouldTranslate → bool: Whether to detect translation gestures during the event processing.
final

createElement() → StatefulElement: Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → _MatrixGestureDetectorState: 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}) → 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

compose(Matrix4 matrix, Matrix4? translationMatrix, Matrix4? scaleMatrix, Matrix4? rotationMatrix) → Matrix4: Compose the matrix from translation, scale and rotation matrices - you can pass a null to skip any matrix from composition.
decomposeToValues(Matrix4 matrix) → MatrixDecomposedValues: Decomposes matrix into MatrixDecomposedValues.translation, MatrixDecomposedValues.scale and MatrixDecomposedValues.rotation components.