220 lines
6.5 KiB
Java
220 lines
6.5 KiB
Java
/* DragGestureEvent.java --
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt.dnd;
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import java.awt.Component;
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import java.awt.Cursor;
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import java.awt.Image;
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import java.awt.Point;
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import java.awt.datatransfer.Transferable;
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import java.awt.event.InputEvent;
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import java.util.EventObject;
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import java.util.Iterator;
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import java.util.List;
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public class DragGestureEvent extends EventObject
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{
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/**
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* Compatible with JDK 1.2+.
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*/
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private static final long serialVersionUID = 9080172649166731306L;
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private DragSource dragSource;
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private Component component;
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private final Point origin;
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private final int action;
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private List<InputEvent> events;
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private DragGestureRecognizer dgr;
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/**
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* Constructs a new DragGestureEvent.
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* @param dgr - DragGestureRecognizer firing this event
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* @param action - user's preferred action
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* @param origin - origin of the drag
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* @param events - List of events that make up the gesture
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* @throws IllegalArgumentException - if input parameters are null
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*/
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public DragGestureEvent(DragGestureRecognizer dgr, int action, Point origin,
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List<? extends InputEvent> events)
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{
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super(dgr);
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if (origin == null || events == null || dgr == null)
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throw new IllegalArgumentException();
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this.origin = origin;
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this.action = action;
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this.events = (List<InputEvent>) events;
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this.dgr = dgr;
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this.component = dgr.getComponent();
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this.dragSource = dgr.getDragSource();
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}
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/**
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* Returns the source casted as a DragGestureRecognizer.
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*
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* @return the source casted as a DragGestureRecognizer.
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*/
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public DragGestureRecognizer getSourceAsDragGestureRecognizer()
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{
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return (DragGestureRecognizer) getSource();
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}
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/**
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* Returns the Component corresponding to this.
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*
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* @return the Component corresponding to this.
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*/
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public Component getComponent()
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{
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return component;
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}
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/**
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* Gets the DragSource corresponding to this.
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*
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* @return the DragSource corresponding to this.
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*/
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public DragSource getDragSource()
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{
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return dragSource;
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}
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/**
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* Returns the origin of the drag.
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*
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* @return the origin of the drag.
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*/
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public Point getDragOrigin()
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{
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return origin;
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}
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/**
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* Gets an iterator representation of the List of events.
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*
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* @return an iterator representation of the List of events.
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*/
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public Iterator<InputEvent> iterator()
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{
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return events.iterator();
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}
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/**
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* Gets an array representation of the List of events.
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*
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* @return an array representation of the List of events.
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*/
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public Object[] toArray()
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{
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return events.toArray();
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}
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/**
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* Gets an array representation of the List of events.
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*
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* @param array - the array to store the events in.
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* @return an array representation of the List of events.
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*/
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public Object[] toArray(Object[] array)
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{
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return events.toArray(array);
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}
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/**
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* Gets the user's preferred action.
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*
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* @return the user's preferred action.
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*/
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public int getDragAction()
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{
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return action;
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}
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/**
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* Get the event that triggered this gesture.
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*
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* @return the event that triggered this gesture.
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*/
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public InputEvent getTriggerEvent()
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{
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return dgr.getTriggerEvent();
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}
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/**
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* Starts the drag given the initial Cursor to display, the Transferable
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* object, and the DragSourceListener to use.
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*
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* @exception InvalidDnDOperationException If the Drag and Drop system is
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* unable to initiate a drag operation, or if the user attempts to start
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* a drag while an existing drag operation is still executing.
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*/
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public void startDrag(Cursor dragCursor, Transferable trans)
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{
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startDrag(dragCursor, null, null, trans, null);
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}
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/**
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* Starts the drag given the initial Cursor to display, the Transferable
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* object, and the DragSourceListener to use.
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*
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* @exception InvalidDnDOperationException If the Drag and Drop system is
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* unable to initiate a drag operation, or if the user attempts to start
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* a drag while an existing drag operation is still executing.
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*/
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public void startDrag(Cursor dragCursor, Transferable trans,
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DragSourceListener l)
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{
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startDrag(dragCursor, null, null, trans, l);
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}
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/**
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* Starts the drag given the initial Cursor to display, the Transferable
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* object, and the DragSourceListener to use.
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*
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* @exception InvalidDnDOperationException If the Drag and Drop system is
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* unable to initiate a drag operation, or if the user attempts to start
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* a drag while an existing drag operation is still executing.
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*/
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public void startDrag(Cursor dragCursor, Image dragImage, Point imageOffset,
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Transferable trans, DragSourceListener l)
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{
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dragSource.startDrag(this, dragCursor, dragImage, imageOffset, trans, l);
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}
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} // class DragGestureEvent
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