GestureRecognizer class
The base class that all gesture recognizers inherit from.
Provides a basic API that can be used by classes that work with gesture recognizers but don't care about the specific details of the gestures recognizers themselves.
See also:
- GestureDetector, the widget that is used to detect gestures.
- debugPrintRecognizerCallbacksTrace, a flag that can be set to help debug issues with gesture recognizers.
- Inheritance
- Object
- GestureArenaMember
- GestureRecognizer
- Mixed in types
- Implementers
Constructors
- GestureRecognizer({Object debugOwner })
- Initializes the gesture recognizer. [...]
Properties
- debugDescription → String
-
Returns a very short pretty description of the gesture that the
recognizer looks for, like 'tap' or 'horizontal drag'.
read-only
- debugOwner → Object
-
The recognizer's owner. [...]
final
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Methods
-
addPointer(
PointerDownEvent event) → void - Registers a new pointer that might be relevant to this gesture detector. [...]
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node. [...]
override
-
dispose(
) → void -
Releases any resources used by the object. [...]
@mustCallSuper
-
invokeCallback<
T>( String name, RecognizerCallback< T> callback, { String debugReport() }) → T -
Invoke a callback provided by the application, catching and logging any
exceptions. [...]
@protected
-
acceptGesture(
int pointer) → void -
Called when this member wins the arena for the given pointer id.
inherited
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children. [...]
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed. [...]
inherited
-
rejectGesture(
int pointer) → void -
Called when this member loses the arena for the given pointer id.
inherited
-
toDiagnosticsNode(
{String name, DiagnosticsTreeStyle style }) → DiagnosticsNode -
Returns a debug representation of the object that is used by debugging
tools and by toStringDeep. [...]
inherited
-
toString(
{DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String -
Returns 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 brief description of this object, usually just the runtimeType and the
hashCode. [...]
inherited
Operators
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited