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## Package org.eclipse.jface.util

Provides useful building blocks used throughout JFace, including property change events, a listener list implementation, and runtime checked assertions.

See:
Description

Interface Summary
IOpenEventListener | Listener for open events which are generated on selection of default selection depending on the user preferences.
IPropertyChangeListener | Listener for property changes.
TransferDragSourceListener | A `TransferDragSourceListener` is a `DragSourceListener` that can handle one type of SWT `Transfer`.
TransferDropTargetListener | A `TransferDropTargetListener` is a `DropTragetListener` that handles one type of SWT `Transfer`.

Class Summary
Assert | `Assert` is useful for for embedding runtime sanity checks in code.
DelegatingDragAdapter | A `DelegatingDragAdapter` is a `DragSourceListener` that maintains and delegates to a set of `TransferDragSourceListener`s.
DelegatingDropAdapter | A `DelegatingDropAdapter` is a `DropTargetListener` that maintains and delegates to a set of `TransferDropTargetListener`s.
Geometry | Contains static methods for performing simple geometric operations on the SWT geometry classes.
ListenerList | This class is used to maintain a list of listeners, and is used in the implementations of several classes within JFace which allow you to register listeners of various kinds.
OpenStrategy | Implementation of single-click and double-click strategies.
Policy | The Policy class is a class to handle debug flags within the JFace plug-in.
PropertyChangeEvent | An event object describing a change to a named property.
SafeRunnable | Implements a default implementation of ISafeRunnable.

## Package org.eclipse.jface.util Description

Provides useful building blocks used throughout JFace, including property change events, a listener list implementation, and runtime checked assertions.

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