javafx.scene.control.Skin Maven / Gradle / Ivy
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package javafx.scene.control;
import javafx.scene.Node;
/**
* Base class for defining the visual representation of user interface controls
* by defining a scene graph of nodes to represent the skin.
* A user interface control is abstracted behind the {@link Skinnable} interface.
*
* @param A subtype of Skinnable that the Skin represents. This allows for
* Skin implementation to access the {@link Skinnable} implementation,
* which is usually a {@link Control} implementation.
* @since JavaFX 2.0
*/
public interface Skin {
/**
* Gets the Skinnable to which this Skin is assigned. A Skin must be created
* for one and only one Skinnable. This value will only ever go from a
* non-null to null value when the Skin is removed from the Skinnable, and
* only as a consequence of a call to {@link #dispose()}.
*
* The caller who constructs a Skinnable must also construct a Skin and
* properly establish the relationship between the Control and its Skin.
*
* @return A non-null Skinnable, or null value if disposed.
*/
public C getSkinnable();
/**
* Gets the Node which represents this Skin. This must never be null, except
* after a call to {@link #dispose()}, and must never change except when
* changing to null.
*
* @return A non-null Node, except when the Skin has been disposed.
*/
public Node getNode();
/**
* Called by a Skinnable when the Skin is replaced on the Skinnable. This method
* allows a Skin to implement any logic necessary to clean up itself after
* the Skin is no longer needed. It may be used to release native resources.
* The methods {@link #getSkinnable()} and {@link #getNode()}
* should return null following a call to dispose. Calling dispose twice
* has no effect.
*/
public void dispose();
}