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src/java.desktop/share/classes/java/awt/dnd/DropTargetAdapter.java

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*** 28,70 **** /** * An abstract adapter class for receiving drop target events. The methods in * this class are empty. This class exists only as a convenience for creating * listener objects. * <p> ! * Extend this class to create a <code>DropTargetEvent</code> listener * and override the methods for the events of interest. (If you implement the ! * <code>DropTargetListener</code> interface, you have to define all of * the methods in it. This abstract class defines a null implementation for ! * every method except <code>drop(DropTargetDropEvent)</code>, so you only have * to define methods for events you care about.) You must provide an ! * implementation for at least <code>drop(DropTargetDropEvent)</code>. This * method cannot have a null implementation because its specification requires * that you either accept or reject the drop, and, if accepted, indicate * whether the drop was successful. * <p> * Create a listener object using the extended class and then register it with ! * a <code>DropTarget</code>. When the drag enters, moves over, or exits ! * the operable part of the drop site for that <code>DropTarget</code>, when * the drop action changes, and when the drop occurs, the relevant method in ! * the listener object is invoked, and the <code>DropTargetEvent</code> is * passed to it. * <p> ! * The operable part of the drop site for the <code>DropTarget</code> is ! * the part of the associated <code>Component</code>'s geometry that is not * obscured by an overlapping top-level window or by another ! * <code>Component</code> higher in the Z-order that has an associated active ! * <code>DropTarget</code>. * <p> * During the drag, the data associated with the current drag operation can be ! * retrieved by calling <code>getTransferable()</code> on ! * <code>DropTargetDragEvent</code> instances passed to the listener's * methods. * <p> ! * Note that <code>getTransferable()</code> on the ! * <code>DropTargetDragEvent</code> instance should only be called within the * respective listener's method and all the necessary data should be retrieved ! * from the returned <code>Transferable</code> before that method returns. * * @see DropTargetEvent * @see DropTargetListener * * @author David Mendenhall --- 28,70 ---- /** * An abstract adapter class for receiving drop target events. The methods in * this class are empty. This class exists only as a convenience for creating * listener objects. * <p> ! * Extend this class to create a {@code DropTargetEvent} listener * and override the methods for the events of interest. (If you implement the ! * {@code DropTargetListener} interface, you have to define all of * the methods in it. This abstract class defines a null implementation for ! * every method except {@code drop(DropTargetDropEvent)}, so you only have * to define methods for events you care about.) You must provide an ! * implementation for at least {@code drop(DropTargetDropEvent)}. This * method cannot have a null implementation because its specification requires * that you either accept or reject the drop, and, if accepted, indicate * whether the drop was successful. * <p> * Create a listener object using the extended class and then register it with ! * a {@code DropTarget}. When the drag enters, moves over, or exits ! * the operable part of the drop site for that {@code DropTarget}, when * the drop action changes, and when the drop occurs, the relevant method in ! * the listener object is invoked, and the {@code DropTargetEvent} is * passed to it. * <p> ! * The operable part of the drop site for the {@code DropTarget} is ! * the part of the associated {@code Component}'s geometry that is not * obscured by an overlapping top-level window or by another ! * {@code Component} higher in the Z-order that has an associated active ! * {@code DropTarget}. * <p> * During the drag, the data associated with the current drag operation can be ! * retrieved by calling {@code getTransferable()} on ! * {@code DropTargetDragEvent} instances passed to the listener's * methods. * <p> ! * Note that {@code getTransferable()} on the ! * {@code DropTargetDragEvent} instance should only be called within the * respective listener's method and all the necessary data should be retrieved ! * from the returned {@code Transferable} before that method returns. * * @see DropTargetEvent * @see DropTargetListener * * @author David Mendenhall
*** 72,109 **** */ public abstract class DropTargetAdapter implements DropTargetListener { /** * Called while a drag operation is ongoing, when the mouse pointer enters ! * the operable part of the drop site for the <code>DropTarget</code> * registered with this listener. * ! * @param dtde the <code>DropTargetDragEvent</code> */ public void dragEnter(DropTargetDragEvent dtde) {} /** * Called when a drag operation is ongoing, while the mouse pointer is still ! * over the operable part of the drop site for the <code>DropTarget</code> * registered with this listener. * ! * @param dtde the <code>DropTargetDragEvent</code> */ public void dragOver(DropTargetDragEvent dtde) {} /** * Called if the user has modified * the current drop gesture. * ! * @param dtde the <code>DropTargetDragEvent</code> */ public void dropActionChanged(DropTargetDragEvent dtde) {} /** * Called while a drag operation is ongoing, when the mouse pointer has * exited the operable part of the drop site for the ! * <code>DropTarget</code> registered with this listener. * ! * @param dte the <code>DropTargetEvent</code> */ public void dragExit(DropTargetEvent dte) {} } --- 72,109 ---- */ public abstract class DropTargetAdapter implements DropTargetListener { /** * Called while a drag operation is ongoing, when the mouse pointer enters ! * the operable part of the drop site for the {@code DropTarget} * registered with this listener. * ! * @param dtde the {@code DropTargetDragEvent} */ public void dragEnter(DropTargetDragEvent dtde) {} /** * Called when a drag operation is ongoing, while the mouse pointer is still ! * over the operable part of the drop site for the {@code DropTarget} * registered with this listener. * ! * @param dtde the {@code DropTargetDragEvent} */ public void dragOver(DropTargetDragEvent dtde) {} /** * Called if the user has modified * the current drop gesture. * ! * @param dtde the {@code DropTargetDragEvent} */ public void dropActionChanged(DropTargetDragEvent dtde) {} /** * Called while a drag operation is ongoing, when the mouse pointer has * exited the operable part of the drop site for the ! * {@code DropTarget} registered with this listener. * ! * @param dte the {@code DropTargetEvent} */ public void dragExit(DropTargetEvent dte) {} }
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