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## org.eclipse.birt.report.model.api.activity
Interface ActivityStackListener

    public interface ActivityStackListener

The interface receives events about activity stack changes. The listener can listen to the activity stack. A listener follows the adapter pattern: it adapts a "client" object (usually a UI object) to receive notifications from activity stack (the one from which to receive events.)

Method Summary
`void` | `stackChanged(ActivityStackEvent event)` Invoked when stack size changed, which is caused after the completion of each execution, transaction, undo, or redo.

Method Detail

### stackChanged

    void stackChanged(ActivityStackEvent event)

  Invoked when stack size changed, which is caused after the completion of each execution, transaction, undo, or redo.

  Parameters:
    `event` - the activity stack event

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