CPDFAnnotationHistoryManager class

This class manages the history of annotations being edited in the current document,
providing APIs for undo and redo functionality.
It extends from CPDFHistoryManagerBase to provide the necessary methods for history management.

example:

CPDFAnnotationHistoryManager historyManager = widget.controller.annotationHistoryManager;
historyManager.setOnHistoryChangedListener((canUndo, canRedo) {
  // Handle history changes here
  print('Can Undo: $canUndo, Can Redo: $canRedo');
  // Update UI or perform other actions based on history state
});
// To check if undo or redo is possible
bool canUndo = await historyManager.canUndo();
bool canRedo = await historyManager.canRedo();

// To perform undo or redo actions
await historyManager.undo();
await historyManager.redo();

Inheritance

• Object
• CPDFHistoryManagerBase
• CPDFAnnotationHistoryManager

Constructors

CPDFAnnotationHistoryManager.new(MethodChannel _channel)

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

canRedo() → Future<bool>

Checks if an undo operation is possible.

override

canUndo() → Future<bool>

Checks if a redo operation is possible.

override

handleMethodCall(MethodCall call) → void

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

redo() → Future<void>

Performs a redo operation on the annotation history.

override

setOnHistoryChangedListener(CPDFAnnotationHistoryChangedCallback callback) → void

Sets a callback to be invoked when the annotation history changes.
This callback will receive two boolean parameters:

toString() → String

A string representation of this object.

inherited

undo() → Future<void>

Performs an undo operation on the annotation history.
example:

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited