UndoHistoryState<T> class
State for a UndoHistory.
Provides undo, redo, canUndo, and canRedo for programmatic access to the undo state for custom undo and redo UI implementations.
- Inheritance
-
- Object
- State<
UndoHistory< T> > - UndoHistoryState
- Mixed-in types
- Annotations
Constructors
Properties
- canRedo → bool
-
Will be true if there are future values on the stack.
no setteroverride
- canUndo → bool
-
Will be true if there are past values on the stack.
no setteroverride
- context → BuildContext
-
The location in the tree where this widget builds.
no setterinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- mounted → bool
-
Whether this State object is currently in a tree.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
widget
→ UndoHistory<
T> -
The current configuration.
no setterinherited
Methods
-
activate(
) → void -
Called when this object is reinserted into the tree after having been
removed via deactivate.
inherited
-
build(
BuildContext context) → Widget -
Describes the part of the user interface represented by this widget.
override
-
deactivate(
) → void -
Called when this object is removed from the tree.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
didChangeDependencies(
) → void -
Called when a dependency of this State object changes.
inherited
-
didUpdateWidget(
covariant UndoHistory< T> oldWidget) → void -
Called whenever the widget configuration changes.
override
-
dispose(
) → void -
Called when this object is removed from the tree permanently.
override
-
handlePlatformUndo(
UndoDirection direction) → void -
Requests that the client perform an undo or redo operation.
override
-
initState(
) → void -
Called when this object is inserted into the tree.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
reassemble(
) → void -
Called whenever the application is reassembled during debugging, for
example during hot reload.
inherited
-
redo(
) → void -
Updates the value on the stack to the next value.
override
-
setState(
VoidCallback fn) → void -
Notify the framework that the internal state of this object has changed.
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.info}) → String -
A string representation of this object.
inherited
-
toStringShort(
) → String -
A brief description of this object, usually just the runtimeType and the
hashCode.
inherited
-
undo(
) → void -
Reverts the value on the stack to the previous value.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited