| /* |
| * @(#)AbstractTreeTableModel.java 1.2 98/10/27 |
| * |
| * Copyright 1997, 1998 by Sun Microsystems, Inc., |
| * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A. |
| * All rights reserved. |
| * |
| * This software is the confidential and proprietary information |
| * of Sun Microsystems, Inc. ("Confidential Information"). You |
| * shall not disclose such Confidential Information and shall use |
| * it only in accordance with the terms of the license agreement |
| * you entered into with Sun. |
| */ |
| package net.sf.taverna.t2.lang.ui.treetable; |
| |
| import javax.swing.event.EventListenerList; |
| import javax.swing.event.TreeModelEvent; |
| import javax.swing.event.TreeModelListener; |
| import javax.swing.tree.TreePath; |
| |
| /** |
| * @version 1.2 10/27/98 |
| * An abstract implementation of the TreeTableModel interface, handling the list |
| * of listeners. |
| * @author Philip Milne |
| */ |
| |
| public abstract class AbstractTreeTableModel implements TreeTableModel { |
| protected Object root; |
| protected EventListenerList listenerList = new EventListenerList(); |
| |
| public AbstractTreeTableModel(Object root) { |
| this.root = root; |
| } |
| |
| // |
| // Default implementations for methods in the TreeModel interface. |
| // |
| |
| public Object getRoot() { |
| return root; |
| } |
| |
| public boolean isLeaf(Object node) { |
| return getChildCount(node) == 0; |
| } |
| |
| public void valueForPathChanged(TreePath path, Object newValue) {} |
| |
| // This is not called in the JTree's default mode: use a naive implementation. |
| public int getIndexOfChild(Object parent, Object child) { |
| for (int i = 0; i < getChildCount(parent); i++) { |
| if (getChild(parent, i).equals(child)) { |
| return i; |
| } |
| } |
| return -1; |
| } |
| |
| public void addTreeModelListener(TreeModelListener l) { |
| listenerList.add(TreeModelListener.class, l); |
| } |
| |
| public void removeTreeModelListener(TreeModelListener l) { |
| listenerList.remove(TreeModelListener.class, l); |
| } |
| |
| /* |
| * Notify all listeners that have registered interest for |
| * notification on this event type. The event instance |
| * is lazily created using the parameters passed into |
| * the fire method. |
| * @see EventListenerList |
| */ |
| protected void fireTreeNodesChanged(Object source, Object[] path, |
| int[] childIndices, |
| Object[] children) { |
| // Guaranteed to return a non-null array |
| Object[] listeners = listenerList.getListenerList(); |
| TreeModelEvent e = null; |
| // Process the listeners last to first, notifying |
| // those that are interested in this event |
| for (int i = listeners.length-2; i>=0; i-=2) { |
| if (listeners[i]==TreeModelListener.class) { |
| // Lazily create the event: |
| if (e == null) |
| e = new TreeModelEvent(source, path, |
| childIndices, children); |
| ((TreeModelListener)listeners[i+1]).treeNodesChanged(e); |
| } |
| } |
| } |
| |
| /* |
| * Notify all listeners that have registered interest for |
| * notification on this event type. The event instance |
| * is lazily created using the parameters passed into |
| * the fire method. |
| * @see EventListenerList |
| */ |
| protected void fireTreeNodesInserted(Object source, Object[] path, |
| int[] childIndices, |
| Object[] children) { |
| // Guaranteed to return a non-null array |
| Object[] listeners = listenerList.getListenerList(); |
| TreeModelEvent e = null; |
| // Process the listeners last to first, notifying |
| // those that are interested in this event |
| for (int i = listeners.length-2; i>=0; i-=2) { |
| if (listeners[i]==TreeModelListener.class) { |
| // Lazily create the event: |
| if (e == null) |
| e = new TreeModelEvent(source, path, |
| childIndices, children); |
| ((TreeModelListener)listeners[i+1]).treeNodesInserted(e); |
| } |
| } |
| } |
| |
| /* |
| * Notify all listeners that have registered interest for |
| * notification on this event type. The event instance |
| * is lazily created using the parameters passed into |
| * the fire method. |
| * @see EventListenerList |
| */ |
| protected void fireTreeNodesRemoved(Object source, Object[] path, |
| int[] childIndices, |
| Object[] children) { |
| // Guaranteed to return a non-null array |
| Object[] listeners = listenerList.getListenerList(); |
| TreeModelEvent e = null; |
| // Process the listeners last to first, notifying |
| // those that are interested in this event |
| for (int i = listeners.length-2; i>=0; i-=2) { |
| if (listeners[i]==TreeModelListener.class) { |
| // Lazily create the event: |
| if (e == null) |
| e = new TreeModelEvent(source, path, |
| childIndices, children); |
| ((TreeModelListener)listeners[i+1]).treeNodesRemoved(e); |
| } |
| } |
| } |
| |
| /* |
| * Notify all listeners that have registered interest for |
| * notification on this event type. The event instance |
| * is lazily created using the parameters passed into |
| * the fire method. |
| * @see EventListenerList |
| */ |
| protected void fireTreeStructureChanged(Object source, Object[] path, |
| int[] childIndices, |
| Object[] children) { |
| // Guaranteed to return a non-null array |
| Object[] listeners = listenerList.getListenerList(); |
| TreeModelEvent e = null; |
| // Process the listeners last to first, notifying |
| // those that are interested in this event |
| for (int i = listeners.length-2; i>=0; i-=2) { |
| if (listeners[i]==TreeModelListener.class) { |
| // Lazily create the event: |
| if (e == null) |
| e = new TreeModelEvent(source, path, |
| childIndices, children); |
| ((TreeModelListener)listeners[i+1]).treeStructureChanged(e); |
| } |
| } |
| } |
| |
| // |
| // Default impelmentations for methods in the TreeTableModel interface. |
| // |
| |
| public Class getColumnClass(int column) { return Object.class; } |
| |
| /** By default, make the column with the Tree in it the only editable one. |
| * Making this column editable causes the JTable to forward mouse |
| * and keyboard events in the Tree column to the underlying JTree. |
| */ |
| public boolean isCellEditable(Object node, int column) { |
| return getColumnClass(column) == TreeTableModel.class; |
| } |
| |
| public void setValueAt(Object aValue, Object node, int column) {} |
| |
| |
| // Left to be implemented in the subclass: |
| |
| /* |
| * public Object getChild(Object parent, int index) |
| * public int getChildCount(Object parent) |
| * public int getColumnCount() |
| * public String getColumnName(Object node, int column) |
| * public Object getValueAt(Object node, int column) |
| */ |
| } |