| /******************************************************************************* |
| * Copyright (C) 2007 The University of Manchester |
| * |
| * Modifications to the initial code base are copyright of their |
| * respective authors, or their employers as appropriate. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public License |
| * as published by the Free Software Foundation; either version 2.1 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser 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 |
| ******************************************************************************/ |
| package net.sf.taverna.t2.workbench.iterationstrategy.editor; |
| |
| import java.awt.GraphicsEnvironment; |
| import java.awt.datatransfer.DataFlavor; |
| import java.awt.datatransfer.Transferable; |
| import java.awt.datatransfer.UnsupportedFlavorException; |
| //import java.awt.image.BufferedImage; |
| import java.io.IOException; |
| |
| import javax.swing.DropMode; |
| import javax.swing.JComponent; |
| import javax.swing.JTree; |
| import javax.swing.TransferHandler; |
| import javax.swing.tree.DefaultTreeModel; |
| import javax.swing.tree.TreePath; |
| import javax.swing.tree.TreeSelectionModel; |
| |
| import net.sf.taverna.t2.workbench.ui.zaria.UIComponentSPI; |
| import net.sf.taverna.t2.workflowmodel.processor.iteration.AbstractIterationStrategyNode; |
| import net.sf.taverna.t2.workflowmodel.processor.iteration.IterationStrategy; |
| import net.sf.taverna.t2.workflowmodel.processor.iteration.NamedInputPortNode; |
| import net.sf.taverna.t2.workflowmodel.processor.iteration.TerminalNode; |
| |
| import org.apache.log4j.Logger; |
| |
| @SuppressWarnings("serial") |
| public class IterationStrategyEditor extends IterationStrategyTree implements |
| UIComponentSPI { |
| |
| private static Logger logger = Logger |
| .getLogger(IterationStrategyEditor.class); |
| |
| //private BufferedImage imgGhost; // The 'drag image' |
| |
| // mouse was clicked |
| |
| public IterationStrategyEditor() { |
| super(); |
| // Make this a drag source |
| if (!GraphicsEnvironment.isHeadless()) { |
| this.setDragEnabled(true); |
| this.setDropMode(DropMode.ON_OR_INSERT); |
| this.setTransferHandler(new TreeTransferHandler()); |
| this.getSelectionModel().setSelectionMode( |
| TreeSelectionModel.CONTIGUOUS_TREE_SELECTION); |
| expandTree(); |
| } |
| |
| // |
| } |
| |
| public IterationStrategyEditor(IterationStrategy theStrategy) { |
| this(); |
| setIterationStrategy(theStrategy); |
| } |
| |
| /** |
| * |
| * This code is freely adapted from code derived |
| * |
| */ |
| class TreeTransferHandler extends TransferHandler { |
| DataFlavor nodesFlavor; |
| DataFlavor[] flavors = new DataFlavor[1]; |
| |
| public TreeTransferHandler() { |
| getNodesFlavor(); |
| } |
| |
| private DataFlavor getNodesFlavor() { |
| if (nodesFlavor == null) { |
| try { |
| nodesFlavor = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType + |
| ";class=" + AbstractIterationStrategyNode.class.getName(), |
| "AbstractIterationStrategyNode", |
| this.getClass().getClassLoader()); |
| flavors[0] = nodesFlavor; |
| } catch(Exception e) { |
| logger.error("Problem creating nodesFlavor:" + e); |
| } |
| } |
| return nodesFlavor; |
| } |
| |
| public boolean canImport(TransferHandler.TransferSupport support) { |
| if(!support.isDrop()) { |
| logger.error("isDrop not supported"); |
| return false; |
| } |
| |
| if(!support.isDataFlavorSupported(getNodesFlavor())) { |
| logger.info("Not correct flavor"); |
| return false; |
| } |
| // Do not allow a drop on the drag source selections. |
| JTree.DropLocation dl = |
| (JTree.DropLocation)support.getDropLocation(); |
| TreePath dest = dl.getPath(); |
| AbstractIterationStrategyNode destination = |
| (AbstractIterationStrategyNode)dest.getLastPathComponent(); |
| Transferable t = support.getTransferable(); |
| if (destination instanceof TerminalNode) { |
| return false; |
| } |
| try { |
| AbstractIterationStrategyNode node = (AbstractIterationStrategyNode) t.getTransferData(getNodesFlavor()); |
| if (node.isNodeDescendant(destination)) { |
| return false; |
| } |
| } catch (UnsupportedFlavorException e) { |
| return false; |
| } catch (IOException e) { |
| return false; |
| } |
| // JTree tree = (JTree) support.getComponent(); |
| // int dropRow = tree.getRowForPath(dl.getPath()); |
| // int selRow = tree.getLeadSelectionRow(); |
| // if (selRow == dropRow) { |
| // logger.info("Dragging to source"); |
| // return false; |
| // |
| // } |
| support.setShowDropLocation(true); |
| return true; |
| } |
| |
| protected Transferable createTransferable(JComponent c) { |
| JTree tree = (JTree)c; |
| TreePath[] paths = tree.getSelectionPaths(); |
| if(paths != null) { |
| AbstractIterationStrategyNode node = |
| (AbstractIterationStrategyNode)paths[0].getLastPathComponent(); |
| return new NodeTransferable(node); |
| } |
| return null; |
| } |
| |
| protected void exportDone(JComponent source, Transferable data, int action) { |
| } |
| |
| public int getSourceActions(JComponent c) { |
| return MOVE; |
| } |
| |
| public boolean importData(TransferHandler.TransferSupport support) { |
| if(!canImport(support)) { |
| logger.info("Cannot import"); |
| return false; |
| } |
| // Extract transfer data. |
| AbstractIterationStrategyNode node = null; |
| try { |
| Transferable t = support.getTransferable(); |
| node = (AbstractIterationStrategyNode) t.getTransferData(getNodesFlavor()); |
| } catch(UnsupportedFlavorException ufe) { |
| logger.error("UnsupportedFlavor", ufe); |
| } catch (Exception e) { |
| logger.error("Problem getting transfer data", e); |
| } |
| |
| // Get drop location info. |
| JTree.DropLocation dl = |
| (JTree.DropLocation)support.getDropLocation(); |
| int childIndex = dl.getChildIndex(); |
| TreePath dest = dl.getPath(); |
| AbstractIterationStrategyNode parent = |
| (AbstractIterationStrategyNode)dest.getLastPathComponent(); |
| int index = childIndex; |
| logger.info ("parent is a " + parent.getClass().getName()); |
| if (parent instanceof NamedInputPortNode) { |
| AbstractIterationStrategyNode sibling = parent; |
| parent = (AbstractIterationStrategyNode) sibling.getParent(); |
| index = parent.getIndex(sibling); |
| } else if (index == -1) { |
| index = parent.getChildCount(); |
| } |
| if (parent instanceof TerminalNode) { |
| if (parent.getChildCount() > 0) { |
| parent = (AbstractIterationStrategyNode) parent.getChildAt(0); |
| index = parent.getChildCount(); |
| } |
| |
| } |
| logger.info("parent is a " + parent.getClass().getName()); |
| |
| try { |
| // The parent insert removes from the oldParent |
| parent.insert(node, index++); |
| DefaultTreeModel model = IterationStrategyEditor.this |
| .getModel(); |
| refreshModel(); |
| } catch (IllegalStateException e) { |
| logger.error(e); |
| } catch (IllegalArgumentException e) { |
| logger.error(e); |
| } |
| return true; |
| } |
| |
| public String toString() { |
| return getClass().getName(); |
| } |
| |
| public class NodeTransferable implements Transferable { |
| AbstractIterationStrategyNode node; |
| |
| public NodeTransferable(AbstractIterationStrategyNode node) { |
| this.node = node; |
| } |
| |
| public AbstractIterationStrategyNode getTransferData(DataFlavor flavor) |
| throws UnsupportedFlavorException { |
| if(!isDataFlavorSupported(flavor)) |
| throw new UnsupportedFlavorException(flavor); |
| return node; |
| } |
| |
| public DataFlavor[] getTransferDataFlavors() { |
| return flavors; |
| } |
| |
| public boolean isDataFlavorSupported(DataFlavor flavor) { |
| return getNodesFlavor().equals(flavor); |
| } |
| } |
| } |
| } |