Recognizes taps.
TapGestureRecognizer considers all the pointers involved in the pointer event sequence as contributing to one gesture. For this reason, extra pointer interactions during a tap sequence are not recognized as additional taps. For example, down-1, down-2, up-1, up-2 produces only one tap on up-1.
See also:
- Inheritance
- Object
- GestureArenaMember
- GestureRecognizer
- OneSequenceGestureRecognizer
- PrimaryPointerGestureRecognizer
- TapGestureRecognizer
Constructors
- TapGestureRecognizer()
-
Creates a tap gesture recognizer.
Properties
- onTap → GestureTapCallback
-
A tap has occurred.
read / write - onTapCancel → GestureTapCancelCallback
-
The pointer that previously triggered onTapDown will not end up causing a tap.
read / write - onTapDown → GestureTapDownCallback
-
A pointer that might cause a tap has contacted the screen at a particular location.
read / write - onTapUp → GestureTapUpCallback
-
A pointer that will trigger a tap has stopped contacting the screen at a particular location.
read / write - deadline → Duration
-
If non-null, the recognizer will call didExceedDeadline after this amount of time has elapsed since starting to track the primary pointer.
read-only, inherited - hashCode → int
-
Get a hash code for this object.
read-only, inherited - initialPosition → Point
-
The global location at which the primary pointer contacted the screen.
read / write, inherited - primaryPointer → int
-
The ID of the primary pointer this recognizer is tracking.
read / write, inherited - runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited - state → GestureRecognizerState
-
The current state of the recognizer.
read / write, inherited
Operators
-
operator ==(
other) → bool -
The equality operator.
inherited
Methods
-
acceptGesture(
int pointer) → void -
Called when this member wins the arena for the given pointer id.
-
didExceedDeadline(
) → void -
Override to be notified when
deadlineis exceeded. -
handlePrimaryPointer(
PointerEvent event) → void -
Override to provide behavior for the primary pointer when the gesture is still possible.
-
rejectGesture(
int pointer) → void -
Called when this member loses the arena for the given pointer id.
-
resolve(
GestureDisposition disposition) → void -
Resolves this recognizer's participation in each gesture arena with the given disposition.
-
toStringShort(
) → String -
Returns a very short pretty description of the gesture that the recognizer looks for, like 'tap' or 'horizontal drag'.
-
addPointer(
PointerDownEvent event) → void -
Registers a new pointer that might be relevant to this gesture detector.
inherited -
didStopTrackingLastPointer(
int pointer) → void -
Called when the number of pointers this recognizer is tracking changes from one to zero.
inherited -
dispose(
) → void -
Releases any resources used by the object.
inherited -
handleEvent(
PointerEvent event) → void -
Called when a pointer event is routed to this recognizer.
inherited -
invokeCallback(
String name, RecognizerCallback callback) → dynamic -
Invoke a callback provided by the application and log any exceptions.
inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited -
startTrackingPointer(
int pointer) → void -
Causes events related to the given pointer ID to be routed to this recognizer.
inherited -
stopTrackingIfPointerNoLongerDown(
PointerEvent event) → void -
Stops tracking the pointer associated with the given event if the event is a PointerUpEvent or a PointerCancelEvent event.
inherited -
stopTrackingPointer(
int pointer) → void -
Stops events related to the given pointer ID from being routed to this recognizer.
inherited -
toString(
) → String -
Returns a string representation of this object.
inherited