treemodelevent.html

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protected <A HREF="../../../java/lang/Object.html">Object</A>[] <B>children</B></PRE>
<DL>
<DD>Children that have been removed.</DL>

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<A NAME="TreeModelEvent(java.lang.Object, java.lang.Object[], int[], java.lang.Object[])"><!-- --></A><H3>
TreeModelEvent</H3>
<PRE>
public <B>TreeModelEvent</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;source,
                      <A HREF="../../../java/lang/Object.html">Object</A>[]&nbsp;path,
                      int[]&nbsp;childIndices,
                      <A HREF="../../../java/lang/Object.html">Object</A>[]&nbsp;children)</PRE>
<DL>
<DD>Used to create an event when nodes have been changed, inserted, or
 removed, identifying the path to the parent of the modified items as
 an array of Objects. All of the modified objects are siblings which are
 direct descendents (not grandchildren) of the specified parent.
 The positions at which the inserts, deletes, or changes occured are
 specified by an array of <code>int</code>. The indexes in that array
 must be in order, from lowest to highest.
 <p>
 For changes, the indexes in the model correspond exactly to the indexes
 of items currently displayed in the UI. As a result, it is not really
 critical if the indexes are not in their exact order. But after multiple
 inserts or deletes, the items currently in the UI no longer correspond
 to the items in the model. It is therefore critical to specify the
 indexes properly for inserts and deletes.
 <p>
 For inserts, the indexes represent the <i>final</i> state of the tree,
 after the inserts have occurred. Since the indexes must be specified in
 order, the most natural processing methodology is to do the inserts
 starting at the lowest index and working towards the highest. Accumulate
 a Vector of <code>Integer</code> objects that specify the
 insert-locations as you go, then convert the Vector to an
 array of <code>int</code> to create the event. When the postition-index
 equals zero, the node is inserted at the beginning of the list. When the
 position index equals the size of the list, the node is "inserted" at
 (appended to) the end of the list.
 <p>
 For deletes, the indexes represent the <i>initial</i> state of the tree,
 before the deletes have occurred. Since the indexes must be specified in
 order, the most natural processing methodology is to use a delete-counter.
 Start by initializing the counter to zero and start work through the
 list from lowest to higest. Every time you do a delete, add the current
 value of the delete-counter to the index-position where the delete occurred,
 and append the result to a Vector of delete-locations, using
 <code>addElement()</code>. Then increment the delete-counter. The index
 positions stored in the Vector therefore reflect the effects of all previous
 deletes, so they represent each object's position in the initial tree.
 (You could also start at the highest index and working back towards the
 lowest, accumulating a Vector of delete-locations as you go using the
 <code>insertElementAt(Integer, 0)</code>.) However you produce the Vector
 of initial-positions, you then need to convert the Vector of <code>Integer</code>
 objects to an array of <code>int</code> to create the event.
 <p>
 <b>Notes:</b><ul>
 <li>Like the <code>insertNodeInto</code> method in the
    <code>DefaultTreeModel</code> class, <code>insertElementAt</code>
    appends to the <code>Vector</code> when the index matches the size
    of the vector. So you can use <code>insertElementAt(Integer, 0)</code>
    even when the vector is empty.
 <ul>To create a node changed event for the root node, specify the parent
     as null and the "child" index as zero.
 </ul><DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - the Object responsible for generating the event (typically
               the creator of the event object passes <code>this</code>
               for its value)<DD><CODE>path</CODE> - an array of Object identifying the path to the
               parent of the modified item(s), where the first element
               of the array is the Object stored at the root node and
               the last element is the Object stored at the parent node<DD><CODE>childIndices</CODE> - an array of <code>int</code> that specifies the
               index values of the removed items. The indices must be
               in sorted order, from lowest to highest<DD><CODE>children</CODE> - an array of Object containing the inserted, removed, or
                 changed objects<DT><B>See Also: </B><DD><A HREF="../../../javax/swing/tree/TreePath.html"><CODE>TreePath</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="TreeModelEvent(java.lang.Object, javax.swing.tree.TreePath, int[], java.lang.Object[])"><!-- --></A><H3>
TreeModelEvent</H3>
<PRE>
public <B>TreeModelEvent</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;source,
                      <A HREF="../../../javax/swing/tree/TreePath.html">TreePath</A>&nbsp;path,
                      int[]&nbsp;childIndices,
                      <A HREF="../../../java/lang/Object.html">Object</A>[]&nbsp;children)</PRE>
<DL>
<DD>Used to create an event when nodes have been changed, inserted, or
 removed, identifying the path to the parent of the modified items as
 a TreePath object. For more information on how to specify the indexes
 and objects, see
 <code>TreeModelEvent(Object,Object[],int[],Object[])</code>.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - the Object responsible for generating the event (typically
               the creator of the event object passes <code>this</code>
               for its value)<DD><CODE>path</CODE> - a TreePath object that identifies the path to the
               parent of the modified item(s)<DD><CODE>childIndices</CODE> - an array of <code>int</code> that specifies the
               index values of the modified items<DD><CODE>children</CODE> - an array of Object containing the inserted, removed, or
                 changed objects<DT><B>See Also: </B><DD><A HREF="../../../javax/swing/event/TreeModelEvent.html#TreeModelEvent(java.lang.Object, java.lang.Object[], int[], java.lang.Object[])"><CODE>TreeModelEvent(Object,Object[],int[],Object[])</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="TreeModelEvent(java.lang.Object, java.lang.Object[])"><!-- --></A><H3>
TreeModelEvent</H3>
<PRE>
public <B>TreeModelEvent</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;source,
                      <A HREF="../../../java/lang/Object.html">Object</A>[]&nbsp;path)</PRE>
<DL>
<DD>Used to create an event when the node structure has changed in some way,
 identifying the path to the root of a modified subtree as an array of
 Objects. A structure change event might involve nodes swapping position,
 for example, or it might encapsulate multiple inserts and deletes in the
 subtree stemming from the node, where the changes may have taken place at
 different levels of the subtree.
 <blockquote>
   <b>Note:</b><br>
   JTree collapses all nodes under the specified node, so that only its
   immediate children are visible.
 </blockquote><DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - the Object responsible for generating the event (typically
               the creator of the event object passes <code>this</code>
               for its value)<DD><CODE>path</CODE> - an array of Object identifying the path to the root of the
               modified subtree, where the first element of the array is
               the object stored at the root node and the last element
               is the object stored at the changed node<DT><B>See Also: </B><DD><A HREF="../../../javax/swing/tree/TreePath.html"><CODE>TreePath</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="TreeModelEvent(java.lang.Object, javax.swing.tree.TreePath)"><!-- --></A><H3>
TreeModelEvent</H3>
<PRE>
public <B>TreeModelEvent</B>(<A HREF="../../../java/lang/Object.html">Object</A>&nbsp;source,
                      <A HREF="../../../javax/swing/tree/TreePath.html">TreePath</A>&nbsp;path)</PRE>
<DL>
<DD>Used to create an event when the node structure has changed in some way,
 identifying the path to the root of the modified subtree as a TreePath
 object. For more information on this event specification, see
 <code>TreeModelEvent(Object,Object[])</code>.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>source</CODE> - the Object responsible for generating the event (typically
               the creator of the event object passes <code>this</code>
               for its value)<DD><CODE>path</CODE> - a TreePath object that identifies the path to the
               change. In the DefaultTreeModel,
               this object contains an array of user-data objects,
               but a subclass of TreePath could use some totally
               different mechanism -- for example, a node ID number<DT><B>See Also: </B><DD><A HREF="../../../javax/swing/event/TreeModelEvent.html#TreeModelEvent(java.lang.Object, java.lang.Object[])"><CODE>TreeModelEvent(Object,Object[])</CODE></A></DL>
</DD>
</DL>

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<A NAME="getTreePath()"><!-- --></A><H3>
getTreePath</H3>
<PRE>
public <A HREF="../../../javax/swing/tree/TreePath.html">TreePath</A> <B>getTreePath</B>()</PRE>
<DL>
<DD>For all events, except treeStructureChanged,
 returns the parent of the changed nodes.
 For treeStructureChanged events, returns the ancestor of the
 structure that has changed. This and
 <code>getChildIndices</code> are used to get a list of the effected
 nodes.
 <p>
 The one exception to this is a treeNodesChanged event that is to
 identify the root, in which case this will return the root
 and <code>getChildIndices</code> will return null.<DD><DL>
<DT><B>Returns:</B><DD>the TreePath used in identifying the changed nodes.<DT><B>See Also: </B><DD><A HREF="../../../javax/swing/tree/TreePath.html#getLastPathComponent()"><CODE>TreePath.getLastPathComponent()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getPath()"><!-- --></A><H3>
getPath</H3>
<PRE>
public <A HREF="../../../java/lang/Object.html">Object</A>[] <B>getPath</B>()</PRE>
<DL>
<DD>Convenience method to get the array of objects from the TreePath
 instance that this event wraps.<DD><DL>
<DT><B>Returns:</B><DD>an array of Objects, where the first Object is the one
         stored at the root and the last object is the one
         stored at the node identified by the path</DL>
</DD>
</DL>
<HR>

<A NAME="getChildren()"><!-- --></A><H3>
getChildren</H3>
<PRE>
public <A HREF="../../../java/lang/Object.html">Object</A>[] <B>getChildren</B>()</PRE>
<DL>
<DD>Returns the objects that are children of the node identified by
 <code>getPath</code> at the locations specified by
 <code>getChildIndices</code>. If this is a removal event the
 returned objects are no longer children of the parent node.<DD><DL>
<DT><B>Returns:</B><DD>an array of Object containing the children specified by
         the event<DT><B>See Also: </B><DD><A HREF="../../../javax/swing/event/TreeModelEvent.html#getPath()"><CODE>getPath()</CODE></A>, 
<A HREF="../../../javax/swing/event/TreeModelEvent.html#getChildIndices()"><CODE>getChildIndices()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getChildIndices()"><!-- --></A><H3>
getChildIndices</H3>
<PRE>
public int[] <B>getChildIndices</B>()</PRE>
<DL>
<DD>Returns the values of the child indexes. If this is a removal event
 the indexes point to locations in the initial list where items
 were removed. If it is an insert, the indices point to locations
 in the final list where the items were added. For node changes,
 the indices point to the locations of the modified nodes.<DD><DL>
<DT><B>Returns:</B><DD>an array of <code>int</code> containing index locations for
         the children specified by the event</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="../../../java/lang/String.html">String</A> <B>toString</B>()</PRE>
<DL>
<DD>Returns a string that displays and identifies this object's
 properties.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../java/util/EventObject.html#toString()">toString</A></CODE> in class <CODE><A HREF="../../../java/util/EventObject.html">EventObject</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>a String representation of this object</DL>
</DD>
</DL>
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