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0N/A
0N/Apackage java.awt.dnd;
0N/A
0N/A/**
0N/A * An abstract adapter class for receiving drag source events. The methods in
0N/A * this class are empty. This class exists only as a convenience for creating
0N/A * listener objects.
0N/A * <p>
0N/A * Extend this class to create a <code>DragSourceEvent</code> listener
0N/A * and override the methods for the events of interest. (If you implement the
0N/A * <code>DragSourceListener</code> interface, you have to define all of
0N/A * the methods in it. This abstract class defines null methods for them
0N/A * all, so you only have to define methods for events you care about.)
0N/A * <p>
0N/A * Create a listener object using the extended class and then register it with
0N/A * a <code>DragSource</code>. When the drag enters, moves over, or exits
0N/A * a drop site, when the drop action changes, and when the drag ends, the
0N/A * relevant method in the listener object is invoked, and the
0N/A * <code>DragSourceEvent</code> is passed to it.
0N/A * <p>
0N/A * The drop site is <i>associated with the previous <code>dragEnter()</code>
0N/A * invocation</i> if the latest invocation of <code>dragEnter()</code> on this
0N/A * adapter corresponds to that drop site and is not followed by a
0N/A * <code>dragExit()</code> invocation on this adapter.
0N/A *
0N/A * @see DragSourceEvent
0N/A * @see DragSourceListener
0N/A * @see DragSourceMotionListener
0N/A *
0N/A * @author David Mendenhall
0N/A * @since 1.4
0N/A */
0N/Apublic abstract class DragSourceAdapter
0N/A implements DragSourceListener, DragSourceMotionListener {
0N/A
0N/A /**
0N/A * Called as the cursor's hotspot enters a platform-dependent drop site.
0N/A * This method is invoked when all the following conditions are true:
0N/A * <UL>
0N/A * <LI>The cursor's hotspot enters the operable part of
0N/A * a platform-dependent drop site.
0N/A * <LI>The drop site is active.
0N/A * <LI>The drop site accepts the drag.
0N/A * </UL>
0N/A *
0N/A * @param dsde the <code>DragSourceDragEvent</code>
0N/A */
0N/A public void dragEnter(DragSourceDragEvent dsde) {}
0N/A
0N/A /**
0N/A * Called as the cursor's hotspot moves over a platform-dependent drop site.
0N/A * This method is invoked when all the following conditions are true:
0N/A * <UL>
0N/A * <LI>The cursor's hotspot has moved, but still intersects the
0N/A * operable part of the drop site associated with the previous
0N/A * dragEnter() invocation.
0N/A * <LI>The drop site is still active.
0N/A * <LI>The drop site accepts the drag.
0N/A * </UL>
0N/A *
0N/A * @param dsde the <code>DragSourceDragEvent</code>
0N/A */
0N/A public void dragOver(DragSourceDragEvent dsde) {}
0N/A
0N/A /**
0N/A * Called whenever the mouse is moved during a drag operation.
0N/A *
0N/A * @param dsde the <code>DragSourceDragEvent</code>
0N/A */
0N/A public void dragMouseMoved(DragSourceDragEvent dsde) {}
0N/A
0N/A /**
0N/A * Called when the user has modified the drop gesture.
0N/A * This method is invoked when the state of the input
0N/A * device(s) that the user is interacting with changes.
0N/A * Such devices are typically the mouse buttons or keyboard
0N/A * modifiers that the user is interacting with.
0N/A *
0N/A * @param dsde the <code>DragSourceDragEvent</code>
0N/A */
0N/A public void dropActionChanged(DragSourceDragEvent dsde) {}
0N/A
0N/A /**
0N/A * Called as the cursor's hotspot exits a platform-dependent drop site.
0N/A * This method is invoked when any of the following conditions are true:
0N/A * <UL>
0N/A * <LI>The cursor's hotspot no longer intersects the operable part
0N/A * of the drop site associated with the previous dragEnter() invocation.
0N/A * </UL>
0N/A * OR
0N/A * <UL>
0N/A * <LI>The drop site associated with the previous dragEnter() invocation
0N/A * is no longer active.
0N/A * </UL>
0N/A * OR
0N/A * <UL>
0N/A * <LI> The drop site associated with the previous dragEnter() invocation
0N/A * has rejected the drag.
0N/A * </UL>
0N/A *
0N/A * @param dse the <code>DragSourceEvent</code>
0N/A */
0N/A public void dragExit(DragSourceEvent dse) {}
0N/A
0N/A /**
0N/A * This method is invoked to signify that the Drag and Drop
0N/A * operation is complete. The getDropSuccess() method of
0N/A * the <code>DragSourceDropEvent</code> can be used to
0N/A * determine the termination state. The getDropAction() method
0N/A * returns the operation that the drop site selected
0N/A * to apply to the Drop operation. Once this method is complete, the
0N/A * current <code>DragSourceContext</code> and
0N/A * associated resources become invalid.
0N/A *
0N/A * @param dsde the <code>DragSourceDropEvent</code>
0N/A */
0N/A public void dragDropEnd(DragSourceDropEvent dsde) {}
0N/A}