/* File: TransferableRenderer.java * Copyright (C) 2002-2003 The University of Iowa * Created by: Jeremy Faden <jbf@space.physics.uiowa.edu> * Jessica Swanner <jessica@space.physics.uiowa.edu> * Edward E. West <eew@space.physics.uiowa.edu> * * This file is part of the das2 library. * * das2 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 of the License, or * (at your option) any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package org.das2.graph.dnd; import org.das2.graph.Renderer; import java.awt.datatransfer.DataFlavor; import java.awt.datatransfer.Transferable; import java.awt.datatransfer.UnsupportedFlavorException; import java.io.IOException; /** * * @author eew */ public class TransferableRenderer implements Transferable { public static final DataFlavor RENDERER_FLAVOR = localJVMFlavor("org.das2.graph.Renderer"); private static DataFlavor localJVMFlavor(String className) { try { String x = DataFlavor.javaJVMLocalObjectMimeType; return new DataFlavor(x + ";class=" + className); } catch (ClassNotFoundException cnfe) { throw new RuntimeException(cnfe); } } /** The Renderer that this tranferable encapsulates. */ private Renderer renderer; /** Creates a new instance of TransferableRenderer */ public TransferableRenderer(Renderer renderer) { this.renderer = renderer; } /** Returns an object which represents the data to be transferred. The class * of the object returned is defined by the representation class of the flavor. * * @param flavor the requested flavor for the data * @see DataFlavor#getRepresentationClass * @exception IOException if the data is no longer available * in the requested flavor. * @exception UnsupportedFlavorException if the requested data flavor is * not supported. */ public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException, IOException { if (isDataFlavorSupported(flavor)) { if (flavor.equals(RENDERER_FLAVOR)) { return renderer; } } throw new UnsupportedFlavorException(flavor); } /** Returns an array of DataFlavor objects indicating the flavors the data * can be provided in. The array should be ordered according to preference * for providing the data (from most richly descriptive to least descriptive). * @return an array of data flavors in which this data can be transferred */ public DataFlavor[] getTransferDataFlavors() { return new DataFlavor[] { RENDERER_FLAVOR }; } /** Returns whether or not the specified data flavor is supported for * this object. * @param flavor the requested flavor for the data * @return boolean indicating whether or not the data flavor is supported */ public boolean isDataFlavorSupported(DataFlavor flavor) { return flavor.equals(RENDERER_FLAVOR); } }