ChangeStack

changeStack, ChangeStack

Change stack is a way to track the signal values overtime and undo or redo values.

final s = ChangeStackSignal(0, limit: 5);
s.value = 1;
s.value = 2;
s.value = 3;
print(s.value); // 3
s.undo();
print(s.value); // 2
s.redo();
print(s.value); // 3

.clear

Clear the undo/redo stack.

.canUndo

Returns true if there are changes in the undo stack and can move backward.

.canRedo

Returns true if there are changes in the redo stack and can move forward.

.limit

There is an optional limit that can be set for explicit stack size.

final s = ChangeStackSignal(0, limit: 2);
s.value = 1;
s.value = 2;
s.value = 3;
print(s.value); // 3
s.undo();
s.undo();
print(s.value); // 1
print(s.canUndo); // false
s.redo();
print(s.value); // 2