You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
300 lines
9.0 KiB
300 lines
9.0 KiB
/*
|
|
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
|
|
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*
|
|
*/
|
|
|
|
package java.awt.dnd;
|
|
|
|
import java.awt.Point;
|
|
|
|
import java.awt.datatransfer.DataFlavor;
|
|
import java.awt.datatransfer.Transferable;
|
|
|
|
import java.util.List;
|
|
|
|
/**
|
|
* The <code>DropTargetDropEvent</code> is delivered
|
|
* via the <code>DropTargetListener</code> drop() method.
|
|
* <p>
|
|
* The <code>DropTargetDropEvent</code> reports the <i>source drop actions</i>
|
|
* and the <i>user drop action</i> that reflect the current state of the
|
|
* drag-and-drop operation.
|
|
* <p>
|
|
* <i>Source drop actions</i> is a bitwise mask of <code>DnDConstants</code>
|
|
* that represents the set of drop actions supported by the drag source for
|
|
* this drag-and-drop operation.
|
|
* <p>
|
|
* <i>User drop action</i> depends on the drop actions supported by the drag
|
|
* source and the drop action selected by the user. The user can select a drop
|
|
* action by pressing modifier keys during the drag operation:
|
|
* <pre>
|
|
* Ctrl + Shift -> ACTION_LINK
|
|
* Ctrl -> ACTION_COPY
|
|
* Shift -> ACTION_MOVE
|
|
* </pre>
|
|
* If the user selects a drop action, the <i>user drop action</i> is one of
|
|
* <code>DnDConstants</code> that represents the selected drop action if this
|
|
* drop action is supported by the drag source or
|
|
* <code>DnDConstants.ACTION_NONE</code> if this drop action is not supported
|
|
* by the drag source.
|
|
* <p>
|
|
* If the user doesn't select a drop action, the set of
|
|
* <code>DnDConstants</code> that represents the set of drop actions supported
|
|
* by the drag source is searched for <code>DnDConstants.ACTION_MOVE</code>,
|
|
* then for <code>DnDConstants.ACTION_COPY</code>, then for
|
|
* <code>DnDConstants.ACTION_LINK</code> and the <i>user drop action</i> is the
|
|
* first constant found. If no constant is found the <i>user drop action</i>
|
|
* is <code>DnDConstants.ACTION_NONE</code>.
|
|
*
|
|
* @since 1.2
|
|
*/
|
|
|
|
public class DropTargetDropEvent extends DropTargetEvent {
|
|
|
|
private static final long serialVersionUID = -1721911170440459322L;
|
|
|
|
/**
|
|
* Construct a <code>DropTargetDropEvent</code> given
|
|
* the <code>DropTargetContext</code> for this operation,
|
|
* the location of the drag <code>Cursor</code>'s
|
|
* hotspot in the <code>Component</code>'s coordinates,
|
|
* the currently
|
|
* selected user drop action, and the current set of
|
|
* actions supported by the source.
|
|
* By default, this constructor
|
|
* assumes that the target is not in the same virtual machine as
|
|
* the source; that is, {@link #isLocalTransfer()} will
|
|
* return <code>false</code>.
|
|
* <P>
|
|
* @param dtc The <code>DropTargetContext</code> for this operation
|
|
* @param cursorLocn The location of the "Drag" Cursor's
|
|
* hotspot in <code>Component</code> coordinates
|
|
* @param dropAction the user drop action.
|
|
* @param srcActions the source drop actions.
|
|
*
|
|
* @throws NullPointerException
|
|
* if cursorLocn is <code>null</code>
|
|
* @throws IllegalArgumentException
|
|
* if dropAction is not one of <code>DnDConstants</code>.
|
|
* @throws IllegalArgumentException
|
|
* if srcActions is not a bitwise mask of <code>DnDConstants</code>.
|
|
* @throws IllegalArgumentException if dtc is <code>null</code>.
|
|
*/
|
|
|
|
public DropTargetDropEvent(DropTargetContext dtc, Point cursorLocn, int dropAction, int srcActions) {
|
|
super(dtc);
|
|
|
|
if (cursorLocn == null) throw new NullPointerException("cursorLocn");
|
|
|
|
if (dropAction != DnDConstants.ACTION_NONE &&
|
|
dropAction != DnDConstants.ACTION_COPY &&
|
|
dropAction != DnDConstants.ACTION_MOVE &&
|
|
dropAction != DnDConstants.ACTION_LINK
|
|
) throw new IllegalArgumentException("dropAction = " + dropAction);
|
|
|
|
if ((srcActions & ~(DnDConstants.ACTION_COPY_OR_MOVE | DnDConstants.ACTION_LINK)) != 0) throw new IllegalArgumentException("srcActions");
|
|
|
|
location = cursorLocn;
|
|
actions = srcActions;
|
|
this.dropAction = dropAction;
|
|
}
|
|
|
|
/**
|
|
* Construct a <code>DropTargetEvent</code> given the
|
|
* <code>DropTargetContext</code> for this operation,
|
|
* the location of the drag <code>Cursor</code>'s hotspot
|
|
* in the <code>Component</code>'s
|
|
* coordinates, the currently selected user drop action,
|
|
* the current set of actions supported by the source,
|
|
* and a <code>boolean</code> indicating if the source is in the same JVM
|
|
* as the target.
|
|
* <P>
|
|
* @param dtc The DropTargetContext for this operation
|
|
* @param cursorLocn The location of the "Drag" Cursor's
|
|
* hotspot in Component's coordinates
|
|
* @param dropAction the user drop action.
|
|
* @param srcActions the source drop actions.
|
|
* @param isLocal True if the source is in the same JVM as the target
|
|
*
|
|
* @throws NullPointerException
|
|
* if cursorLocn is <code>null</code>
|
|
* @throws IllegalArgumentException
|
|
* if dropAction is not one of <code>DnDConstants</code>.
|
|
* @throws IllegalArgumentException if srcActions is not a bitwise mask of <code>DnDConstants</code>.
|
|
* @throws IllegalArgumentException if dtc is <code>null</code>.
|
|
*/
|
|
|
|
public DropTargetDropEvent(DropTargetContext dtc, Point cursorLocn, int dropAction, int srcActions, boolean isLocal) {
|
|
this(dtc, cursorLocn, dropAction, srcActions);
|
|
|
|
isLocalTx = isLocal;
|
|
}
|
|
|
|
/**
|
|
* This method returns a <code>Point</code>
|
|
* indicating the <code>Cursor</code>'s current
|
|
* location in the <code>Component</code>'s coordinates.
|
|
* <P>
|
|
* @return the current <code>Cursor</code> location in Component's coords.
|
|
*/
|
|
|
|
public Point getLocation() {
|
|
return location;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method returns the current DataFlavors.
|
|
* <P>
|
|
* @return current DataFlavors
|
|
*/
|
|
|
|
public DataFlavor[] getCurrentDataFlavors() {
|
|
return getDropTargetContext().getCurrentDataFlavors();
|
|
}
|
|
|
|
/**
|
|
* This method returns the currently available
|
|
* <code>DataFlavor</code>s as a <code>java.util.List</code>.
|
|
* <P>
|
|
* @return the currently available DataFlavors as a java.util.List
|
|
*/
|
|
|
|
public List<DataFlavor> getCurrentDataFlavorsAsList() {
|
|
return getDropTargetContext().getCurrentDataFlavorsAsList();
|
|
}
|
|
|
|
/**
|
|
* This method returns a <code>boolean</code> indicating if the
|
|
* specified <code>DataFlavor</code> is available
|
|
* from the source.
|
|
* <P>
|
|
* @param df the <code>DataFlavor</code> to test
|
|
* <P>
|
|
* @return if the DataFlavor specified is available from the source
|
|
*/
|
|
|
|
public boolean isDataFlavorSupported(DataFlavor df) {
|
|
return getDropTargetContext().isDataFlavorSupported(df);
|
|
}
|
|
|
|
/**
|
|
* This method returns the source drop actions.
|
|
*
|
|
* @return the source drop actions.
|
|
*/
|
|
public int getSourceActions() { return actions; }
|
|
|
|
/**
|
|
* This method returns the user drop action.
|
|
*
|
|
* @return the user drop actions.
|
|
*/
|
|
public int getDropAction() { return dropAction; }
|
|
|
|
/**
|
|
* This method returns the <code>Transferable</code> object
|
|
* associated with the drop.
|
|
* <P>
|
|
* @return the <code>Transferable</code> associated with the drop
|
|
*/
|
|
|
|
public Transferable getTransferable() {
|
|
return getDropTargetContext().getTransferable();
|
|
}
|
|
|
|
/**
|
|
* accept the drop, using the specified action.
|
|
* <P>
|
|
* @param dropAction the specified action
|
|
*/
|
|
|
|
public void acceptDrop(int dropAction) {
|
|
getDropTargetContext().acceptDrop(dropAction);
|
|
}
|
|
|
|
/**
|
|
* reject the Drop.
|
|
*/
|
|
|
|
public void rejectDrop() {
|
|
getDropTargetContext().rejectDrop();
|
|
}
|
|
|
|
/**
|
|
* This method notifies the <code>DragSource</code>
|
|
* that the drop transfer(s) are completed.
|
|
* <P>
|
|
* @param success a <code>boolean</code> indicating that the drop transfer(s) are completed.
|
|
*/
|
|
|
|
public void dropComplete(boolean success) {
|
|
getDropTargetContext().dropComplete(success);
|
|
}
|
|
|
|
/**
|
|
* This method returns an <code>int</code> indicating if
|
|
* the source is in the same JVM as the target.
|
|
* <P>
|
|
* @return if the Source is in the same JVM
|
|
*/
|
|
|
|
public boolean isLocalTransfer() {
|
|
return isLocalTx;
|
|
}
|
|
|
|
/*
|
|
* fields
|
|
*/
|
|
|
|
static final private Point zero = new Point(0,0);
|
|
|
|
/**
|
|
* The location of the drag cursor's hotspot in Component coordinates.
|
|
*
|
|
* @serial
|
|
*/
|
|
private Point location = zero;
|
|
|
|
/**
|
|
* The source drop actions.
|
|
*
|
|
* @serial
|
|
*/
|
|
private int actions = DnDConstants.ACTION_NONE;
|
|
|
|
/**
|
|
* The user drop action.
|
|
*
|
|
* @serial
|
|
*/
|
|
private int dropAction = DnDConstants.ACTION_NONE;
|
|
|
|
/**
|
|
* <code>true</code> if the source is in the same JVM as the target.
|
|
*
|
|
* @serial
|
|
*/
|
|
private boolean isLocalTx = false;
|
|
}
|