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Diffstat (limited to 'libjava/classpath/java/awt/dnd/DragSource.java')
| -rw-r--r-- | libjava/classpath/java/awt/dnd/DragSource.java | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/libjava/classpath/java/awt/dnd/DragSource.java b/libjava/classpath/java/awt/dnd/DragSource.java new file mode 100644 index 00000000000..13ffc961510 --- /dev/null +++ b/libjava/classpath/java/awt/dnd/DragSource.java @@ -0,0 +1,257 @@ +/* DragSource.java -- + Copyright (C) 2002 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.awt.dnd; + +import java.awt.Component; +import java.awt.Cursor; +import java.awt.GraphicsEnvironment; +import java.awt.HeadlessException; +import java.awt.Image; +import java.awt.Point; +import java.awt.Toolkit; +import java.awt.datatransfer.FlavorMap; +import java.awt.datatransfer.SystemFlavorMap; +import java.awt.datatransfer.Transferable; +import java.awt.dnd.peer.DragSourceContextPeer; +import java.io.Serializable; +import java.util.EventListener; + +/** + * @since 1.2 + */ +public class DragSource implements Serializable +{ + /** + * Compatible with JDK 1.2+. + */ + private static final long serialVersionUID = 6236096958971414066L; + + public static final Cursor DefaultCopyDrop = null; + public static final Cursor DefaultMoveDrop = null; + public static final Cursor DefaultLinkDrop = null; + public static final Cursor DefaultCopyNoDrop = null; + public static final Cursor DefaultMoveNoDrop = null; + public static final Cursor DefaultLinkNoDrop = null; + + private transient FlavorMap flavorMap = SystemFlavorMap.getDefaultFlavorMap (); + + private transient DragSourceListener dragSourceListener; + private transient DragSourceMotionListener dragSourceMotionListener; + + /** + * Initializes the drag source. + * + * @exception HeadlessException If GraphicsEnvironment.isHeadless() is true. + */ + public DragSource() + { + if (GraphicsEnvironment.isHeadless()) + throw new HeadlessException (); + } + + /** + * @exception HeadlessException If GraphicsEnvironment.isHeadless() is true. + */ + public static DragSource getDefaultDragSource() + { + return null; + } + + public static boolean isDragImageSupported() + { + return false; + } + + /** + * Start a drag, given the DragGestureEvent that initiated the drag. + * + * @exception InvalidDnDOperationException If the Drag and Drop system is + * unable to initiate a drag operation, or if the user attempts to start + * a drag while an existing drag operation is still executing. + */ + public void startDrag(DragGestureEvent trigger, Cursor dragCursor, + Image dragImage, Point imageOffset, + Transferable trans, DragSourceListener dsl, + FlavorMap map) + { + } + + /** + * Start a drag, given the DragGestureEvent that initiated the drag. + * + * @exception InvalidDnDOperationException If the Drag and Drop system is + * unable to initiate a drag operation, or if the user attempts to start + * a drag while an existing drag operation is still executing. + */ + public void startDrag(DragGestureEvent trigger, Cursor dragCursor, + Transferable trans, DragSourceListener dsl, + FlavorMap map) + { + startDrag(trigger, dragCursor, null, null, trans, dsl, map); + } + + /** + * Start a drag, given the DragGestureEvent that initiated the drag. + * + * @exception InvalidDnDOperationException If the Drag and Drop system is + * unable to initiate a drag operation, or if the user attempts to start + * a drag while an existing drag operation is still executing. + */ + public void startDrag(DragGestureEvent trigger, Cursor dragCursor, + Image dragImage, Point imageOffset, + Transferable trans, DragSourceListener dsl) + { + startDrag(trigger, dragCursor, dragImage, imageOffset, trans, dsl, null); + } + + /** + * Start a drag, given the DragGestureEvent that initiated the drag. + * + * @exception InvalidDnDOperationException If the Drag and Drop system is + * unable to initiate a drag operation, or if the user attempts to start + * a drag while an existing drag operation is still executing. + */ + public void startDrag(DragGestureEvent trigger, Cursor dragCursor, + Transferable trans, DragSourceListener dsl) + { + startDrag(trigger, dragCursor, null, null, trans, dsl, null); + } + + /** + * Creates the DragSourceContext to handle this drag. + * + * @exception IllegalArgumentException FIXME + * @exception NullPointerException If dscp, dgl, dragImage or t is null. + */ + protected DragSourceContext + createDragSourceContext(DragSourceContextPeer peer, DragGestureEvent dge, + Cursor cursor, Image image, Point offset, + Transferable t, DragSourceListener dsl) + { + return null; + } + + public FlavorMap getFlavorMap() + { + return flavorMap; + } + + public DragGestureRecognizer + createDragGestureRecognizer(Class recognizer, Component c, int actions, + DragGestureListener dgl) + { + return Toolkit.getDefaultToolkit () + .createDragGestureRecognizer (recognizer, this, c, actions, + dgl); + } + + public DragGestureRecognizer + createDefaultDragGestureRecognizer(Component c, int actions, + DragGestureListener dgl) + { + return createDragGestureRecognizer (MouseDragGestureRecognizer.class, c, + actions, dgl); + } + + /** + * @since 1.4 + */ + public void addDragSourceListener(DragSourceListener l) + { + DnDEventMulticaster.add (dragSourceListener, l); + } + + /** + * @since 1.4 + */ + public void removeDragSourceListener(DragSourceListener l) + { + DnDEventMulticaster.remove (dragSourceListener, l); + } + + /** + * @since 1.4 + */ + public DragSourceListener[] getDragSourceListeners() + { + return (DragSourceListener[]) getListeners (DragSourceListener.class); + } + + /** + * @since 1.4 + */ + public void addDragSourceMotionListener(DragSourceMotionListener l) + { + DnDEventMulticaster.add (dragSourceMotionListener, l); + } + + /** + * @since 1.4 + */ + public void removeDragSourceMotionListener(DragSourceMotionListener l) + { + DnDEventMulticaster.remove (dragSourceMotionListener, l); + } + + /** + * @since 1.4 + */ + public DragSourceMotionListener[] getDragSourceMotionListeners () + { + return (DragSourceMotionListener[]) getListeners + (DragSourceMotionListener.class); + } + + /** + * @since 1.4 + */ + public EventListener[] getListeners (Class listenerType) + { + if (listenerType == DragSourceListener.class) + return DnDEventMulticaster.getListeners (dragSourceListener, + listenerType); + + if (listenerType == DragSourceMotionListener.class) + return DnDEventMulticaster.getListeners (dragSourceMotionListener, + listenerType); + + // Return an empty EventListener array. + return new EventListener [0]; + } +} // class DragSource |