ImmediateMultiDragGestureRecognizer class
Recognizes movement both horizontally and vertically on a per-pointer basis.
In contrast to PanGestureRecognizer, ImmediateMultiDragGestureRecognizer watches each pointer separately, which means multiple drags can be recognized concurrently if multiple pointers are in contact with the screen.
See also:
- PanGestureRecognizer, which recognizes only one drag gesture at a time, regardless of how many fingers are involved.
- HorizontalMultiDragGestureRecognizer, which only recognizes drags that start horizontally.
- VerticalMultiDragGestureRecognizer, which only recognizes drags that start vertically.
- DelayedMultiDragGestureRecognizer, which only recognizes drags that start after a long-press gesture.
- Inheritance
- Object
- GestureArenaMember
- GestureRecognizer
- MultiDragGestureRecognizer<
_ImmediatePointerState> - ImmediateMultiDragGestureRecognizer
Constructors
- ImmediateMultiDragGestureRecognizer({Object debugOwner })
- Create a gesture recognizer for tracking multiple pointers at once.
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
- debugOwner → Object
-
The recognizer's owner. [...]
final, inherited
- hashCode → int
-
The hash code for this object. [...]
read-only, inherited
- onStart ↔ GestureMultiDragStartCallback
-
Called when this class recognizes the start of a drag gesture. [...]
read / write, inherited
- runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Methods
-
createNewPointerState(
PointerDownEvent event) → _ImmediatePointerState -
Subclasses should override this method to create per-pointer state
objects to track the pointer associated with the given event.
override
-
acceptGesture(
int pointer) → void -
Called when this member wins the arena for the given pointer id.
inherited
-
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
-
dispose(
) → void -
Releases any resources used by the object. [...]
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
-
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