Initial revision

From-SVN: r102074

libjava/classpath/java/awt/dnd/DragSourceContext.java

@@ -0,0 +1,200 @@
+/* DragSourceContext.java --
+   Copyright (C) 2002 Free Software Foundation
+
+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.Image;
+import java.awt.Point;
+import java.awt.datatransfer.Transferable;
+import java.awt.dnd.peer.DragSourceContextPeer;
+import java.io.Serializable;
+import java.util.TooManyListenersException;
+
+/**
+ * @since 1.2
+ */
+public class DragSourceContext
+  implements DragSourceListener, DragSourceMotionListener, Serializable
+{
+  /**
+   * Compatible with JDK 1.2+
+   */
+  static final long serialVersionUID = -115407898692194719L;
+
+  protected static final int DEFAULT = 0;
+  protected static final int ENTER = 1;
+  protected static final int OVER = 2;
+  protected static final int CHANGED = 3;
+
+  private DragSourceContextPeer peer;
+  private Cursor cursor;
+  private Transferable transferable;
+  private DragGestureEvent trigger;
+  private DragSourceListener dragSourceListener;
+  private boolean useCustomCursor; // FIXME: currently unused but needed for serialization.
+  private int sourceActions; // FIXME: currently unused but needed for serialization.
+  private Image image;
+  private Point offset;
+  
+  /**
+   * Initializes a drag source context.
+   *
+   * @exception IllegalArgumentException If Component or DragSource of trigger
+   * are null, the drag action for the trigger event is DnDConstants.ACTION_NONE
+   * or if the source actions for the DragGestureRecognizer associated with the
+   * trigger event are equal to DnDConstants.ACTION_NONE.
+   * @exception NullPointerException If peer or trigger is null.
+   */
+  public DragSourceContext (DragSourceContextPeer peer,
+                            DragGestureEvent trigger, Cursor cursor,
+                            Image image, Point offset, Transferable trans,
+                            DragSourceListener dsl)
+  {
+    if (peer == null
+        || trigger == null)
+      throw new NullPointerException ();
+
+    if (trigger.getComponent () == null
+        || trigger.getDragSource () == null
+        || trigger.getDragAction () == DnDConstants.ACTION_NONE
+        || trigger.getSourceAsDragGestureRecognizer ()
+              .getSourceActions () == DnDConstants.ACTION_NONE)
+      throw new IllegalArgumentException ();
+
+    this.peer = peer;
+    this.trigger = trigger;
+    this.cursor = cursor;
+    this.image = image;
+    this.offset = offset;
+    this.transferable = trans;
+    this.dragSourceListener = dsl;
+    
+    throw new Error ("not implemented");
+  }
+
+  public DragSource getDragSource()
+  {
+    return trigger.getDragSource ();
+  }
+
+  public Component getComponent()
+  {
+    return trigger.getComponent ();
+  }
+
+  public DragGestureEvent getTrigger()
+  {
+    return trigger;
+  }
+
+  public int getSourceActions()
+  {
+    return trigger.getSourceAsDragGestureRecognizer ().getSourceActions ();
+  }
+
+  public void setCursor (Cursor cursor)
+  {
+    this.cursor = cursor;
+    // FIXME: Check if we need to do more here
+  }
+
+  public Cursor getCursor()
+  {
+    return cursor;
+  }
+
+  /**
+   * Adds a <code>DragSourceListener</code>.
+   *
+   * @exception TooManyListenersException If a <code>DragSourceListener</code>
+   * has already been added.
+   */
+  public void addDragSourceListener (DragSourceListener dsl)
+    throws TooManyListenersException
+  {
+    if (dragSourceListener != null)
+      throw new TooManyListenersException ();
+
+    dragSourceListener = dsl;
+  }
+
+  public void removeDragSourceListener (DragSourceListener dsl)
+  {
+    if (dragSourceListener == dsl)
+      dragSourceListener = null;
+  }
+
+  public void transferablesFlavorsChanged()
+  {
+  }
+
+  public void dragEnter(DragSourceDragEvent e)
+  {
+  }
+
+  public void dragOver(DragSourceDragEvent e)
+  {
+  }
+
+  public void dragExit(DragSourceEvent e)
+  {
+  }
+
+  public void dropActionChanged(DragSourceDragEvent e)
+  {
+  }
+
+  public void dragDropEnd(DragSourceDropEvent e)
+  {
+  }
+
+  public void dragMouseMoved(DragSourceDragEvent e)
+  {
+  }
+
+  public Transferable getTransferable()
+  {
+    return transferable;
+  }
+
+  protected void updateCurrentCursor(int dropOp, int targetAct, int status)
+  {
+  }
+} // class DragSourceContext