A widget that calls callbacks in response to pointer events.
Rather than listening for raw pointer events, consider listening for higher-level gestures using GestureDetector.
If it has a child, this widget defers to the child for sizing behavior. If it does not have a child, it grows to fit the parent instead.
- Inheritance
Constructors
- Listener({Key key, PointerDownEventListener onPointerDown, PointerMoveEventListener onPointerMove, PointerUpEventListener onPointerUp, PointerCancelEventListener onPointerCancel, HitTestBehavior behavior: HitTestBehavior.deferToChild, Widget child })
-
Creates a widget that forwards point events to callbacks.
Properties
- behavior → HitTestBehavior
-
How to behave during hit testing.
read-only - onPointerCancel → PointerCancelEventListener
-
Called when the input from a pointer that triggered an onPointerDown is no longer directed towards this receiver.
read-only - onPointerDown → PointerDownEventListener
-
Called when a pointer comes into contact with the screen at this object.
read-only - onPointerMove → PointerMoveEventListener
-
Called when a pointer that triggered an onPointerDown changes position.
read-only - onPointerUp → PointerUpEventListener
-
Called when a pointer that triggered an onPointerDown is no longer in contact with the screen.
read-only - child → Widget
-
The widget below this widget in the tree.
read-only, inherited - hashCode → int
-
Get a hash code for this object.
read-only, inherited - key → Key
-
Controls how one widget replaces another widget in the tree.
read-only, inherited - runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Operators
-
operator ==(
other) → bool -
The equality operator.
inherited
Methods
-
createRenderObject(
BuildContext context) → RenderPointerListener -
Creates an instance of the
RenderObjectclass that thisRenderObjectWidgetrepresents, using the configuration described by thisRenderObjectWidget. -
debugFillDescription(
List<String> description) → void -
Add additional information to the given description for use by
toString. -
updateRenderObject(
BuildContext context, RenderPointerListener renderObject) → void -
Copies the configuration described by this
RenderObjectWidgetto the givenRenderObject, which will be of the same type as returned by this object'screateRenderObject. -
createElement(
) → SingleChildRenderObjectElement -
RenderObjectWidgets always inflate to a
RenderObjectElementsubclass.inherited -
didUnmountRenderObject(
RenderObject renderObject) → void -
A render object previously associated with this widget has been removed from the tree. The given RenderObject will be of the same type as returned by this object's createRenderObject.
inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited -
toString(
) → String -
Returns a string representation of this object.
inherited -
toStringShort(
) → String -
A short, textual description of this widget.
inherited