SnapshotController class
A controller for the SnapshotWidget that controls when the child image is displayed and when to regenerated the child image.
When the value of allowSnapshotting is true, the SnapshotWidget will paint the child widgets based on the SnapshotMode of the snapshot widget.
The controller notifies its listeners when the value of allowSnapshotting changes or when clear is called.
To force SnapshotWidget to recreate the child image, call clear.
- Inheritance
-
- Object
- ChangeNotifier
- SnapshotController
Constructors
- SnapshotController({bool allowSnapshotting = false})
- Create a new SnapshotController.
Properties
- allowSnapshotting ↔ bool
-
Whether a snapshot of this child widget is painted in its place.
getter/setter pair
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
inherited
-
clear(
) → void - Reset the snapshot held by any listening SnapshotWidget.
-
dispose(
) → void -
Discards any resources used by the object. After this is called, the
object is not in a usable state and should be discarded (calls to
addListener will throw after the object is disposed).
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void -
Call all the registered listeners.
inherited
-
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited