DoubleTapGestureRecognizer class

Recognizes when the user has tapped the screen at the same location twice in quick succession.

DoubleTapGestureRecognizer competes on pointer events of kPrimaryButton only when it has a non-null callback. If it has no callbacks, it is a no-op.

Inheritance

Constructors

DoubleTapGestureRecognizer({Object debugOwner, PointerDeviceKind kind })
Create a gesture recognizer for double taps. [...]

Properties

debugDescription String
Returns a very short pretty description of the gesture that the recognizer looks for, like 'tap' or 'horizontal drag'.
read-only, override
onDoubleTap GestureDoubleTapCallback
Called when the user has tapped the screen with a primary button at the same location twice in quick succession. [...]
read / write
debugOwner Object
The recognizer's owner. [...]
final, inherited
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

acceptGesture(int pointer) → void
Called when this member wins the arena for the given pointer id.
override
addAllowedPointer(PointerEvent event) → void
Registers a new pointer that's been checked to be allowed by this gesture recognizer. [...]
override
dispose() → void
Releases any resources used by the object. [...]
override
isPointerAllowed(PointerEvent event) bool
Checks whether or not a pointer is allowed to be tracked by this recognizer.
override
rejectGesture(int pointer) → void
Called when this member loses the arena for the given pointer id.
override
addPointer(PointerDownEvent event) → void
Registers a new pointer that might be relevant to this gesture detector. [...]
inherited
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
getKindForPointer(int pointer) PointerDeviceKind
For a given pointer ID, returns the device kind associated with it. [...]
@protected, inherited
handleNonAllowedPointer(PointerDownEvent event) → void
Handles a pointer being added that's not allowed by this recognizer. [...]
@protected, inherited
invokeCallback<T>(String name, RecognizerCallback<T> callback, { String debugReport() }) → T
Invoke a callback provided by the application, catching and logging any exceptions. [...]
@protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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.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