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
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- MatrixGestureDetector
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
Properties
- 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
Methods
-
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
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
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.