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/****************************************************************************
Copyright 2004, Colorado School of Mines and others.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
****************************************************************************/
package edu.mines.jtk.sgl;

/**
 * An interface implemented by nodes that can be dragged with a mouse.
 * @author Dave Hale, Colorado School of Mines
 * @version 2005.06.30
 */
public interface Dragable {

  /**
   * Begins dragging.
   * @param dc the drag context.
   */
  public void dragBegin(DragContext dc);

  /**
   * During dragging, this method is called when the mouse moves.
   * @param dc the drag context.
   */
  public void drag(DragContext dc);

  /**
   * Ends dragging.
   * @param dc the drag context.
   */
  public void dragEnd(DragContext dc);
}