api/org/apache/jmeter/gui/UndoHistory.html - jmeter-site - Git at Google

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 <div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.jmeter.gui</a></div>
 <h1 title="Class UndoHistory" class="title">Class UndoHistory</h1>
 </div>
 <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
 <div class="inheritance">org.apache.jmeter.gui.UndoHistory</div>
 </div>
 <section class="class-description" id="class-description">
 <dl class="notes">
 <dt>All Implemented Interfaces:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html" title="class or interface in java.io" class="external-link">Serializable</a></code>, <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/EventListener.html" title="class or interface in java.util" class="external-link">EventListener</a></code>, <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html" title="class or interface in javax.swing.event" class="external-link">TreeModelListener</a></code></dd>
 </dl>
 <hr>
 <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">UndoHistory</span>
 <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>
 implements <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html" title="class or interface in javax.swing.event" class="external-link">TreeModelListener</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html" title="class or interface in java.io" class="external-link">Serializable</a></span></div>
 <div class="block">This class serves storing Test Tree state and navigating through it
  to give the undo/redo ability for test plan changes</div>
 <dl class="notes">
 <dt>Since:</dt>
 <dd>2.12</dd>
 <dt>See Also:</dt>
 <dd>
 <ul class="see-list">
 <li><a href="../../../../serialized-form.html#org.apache.jmeter.gui.UndoHistory">Serialized Form</a></li>
 </ul>
 </dd>
 </dl>
 </section>
 <section class="summary">
 <ul class="summary-list">
 <!-- ======== NESTED CLASS SUMMARY ======== -->
 <li>
 <section class="nested-class-summary" id="nested-class-summary">
 <h2>Nested Class Summary</h2>
 <div class="caption"><span>Nested Classes</span></div>
 <div class="summary-table three-column-summary">
 <div class="table-header col-first">Modifier and Type</div>
 <div class="table-header col-second">Class</div>
 <div class="table-header col-last">Description</div>
 <div class="col-first even-row-color"><code>static interface&nbsp;</code></div>
 <div class="col-second even-row-color"><code><a href="UndoHistory.HistoryListener.html" class="type-name-link" title="interface in org.apache.jmeter.gui">UndoHistory.HistoryListener</a></code></div>
 <div class="col-last even-row-color">
 <div class="block">Interface to be implemented by components interested in UndoHistory</div>
 </div>
 </div>
 </section>
 </li>
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <li>
 <section class="constructor-summary" id="constructor-summary">
 <h2>Constructor Summary</h2>
 <div class="caption"><span>Constructors</span></div>
 <div class="summary-table two-column-summary">
 <div class="table-header col-first">Constructor</div>
 <div class="table-header col-last">Description</div>
 <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">UndoHistory</a>()</code></div>
 <div class="col-last even-row-color">&nbsp;</div>
 </div>
 </section>
 </li>
 <!-- ========== METHOD SUMMARY =========== -->
 <li>
 <section class="method-summary" id="method-summary">
 <h2>Method Summary</h2>
 <div id="method-summary-table">
 <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
 <div id="method-summary-table.tabpanel" role="tabpanel">
 <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
 <div class="table-header col-first">Modifier and Type</div>
 <div class="table-header col-second">Method</div>
 <div class="table-header col-last">Description</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#add(org.apache.jmeter.gui.tree.JMeterTreeModel,java.lang.String)" class="member-name-link">add</a><wbr>(<a href="tree/JMeterTreeModel.html" title="class in org.apache.jmeter.gui.tree">JMeterTreeModel</a>&nbsp;treeModel,
  <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;comment)</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Add tree model copy to the history</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#canRedo()" class="member-name-link">canRedo</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#canUndo()" class="member-name-link">canUndo</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#clear()" class="member-name-link">clear</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Clears the undo history</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static boolean</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#isEnabled()" class="member-name-link">isEnabled</a>()</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#redo()" class="member-name-link">redo</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#registerHistoryListener(org.apache.jmeter.gui.UndoHistory.HistoryListener)" class="member-name-link">registerHistoryListener</a><wbr>(<a href="UndoHistory.HistoryListener.html" title="interface in org.apache.jmeter.gui">UndoHistory.HistoryListener</a>&nbsp;listener)</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Register HistoryListener</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#treeNodesChanged(javax.swing.event.TreeModelEvent)" class="member-name-link">treeNodesChanged</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link">TreeModelEvent</a>&nbsp;tme)</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Record the changes in the node as the undo step</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#treeNodesInserted(javax.swing.event.TreeModelEvent)" class="member-name-link">treeNodesInserted</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link">TreeModelEvent</a>&nbsp;tme)</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Record adding nodes as the undo step</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#treeNodesRemoved(javax.swing.event.TreeModelEvent)" class="member-name-link">treeNodesRemoved</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link">TreeModelEvent</a>&nbsp;tme)</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Record deleting nodes as the undo step</div>
 </div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#treeStructureChanged(javax.swing.event.TreeModelEvent)" class="member-name-link">treeStructureChanged</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link">TreeModelEvent</a>&nbsp;tme)</code></div>
 <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
 <div class="block">Record some other change</div>
 </div>
 <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
 <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#undo()" class="member-name-link">undo</a>()</code></div>
 <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">&nbsp;</div>
 </div>
 </div>
 </div>
 <div class="inherited-list">
 <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
 <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
 </section>
 </li>
 </ul>
 </section>
 <section class="details">
 <ul class="details-list">
 <!-- ========= CONSTRUCTOR DETAIL ======== -->
 <li>
 <section class="constructor-details" id="constructor-detail">
 <h2>Constructor Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="&lt;init&gt;()">
 <h3>UndoHistory</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">UndoHistory</span>()</div>
 </section>
 </li>
 </ul>
 </section>
 </li>
 <!-- ============ METHOD DETAIL ========== -->
 <li>
 <section class="method-details" id="method-detail">
 <h2>Method Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="clear()">
 <h3>clear</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">clear</span>()</div>
 <div class="block">Clears the undo history</div>
 </section>
 </li>
 <li>
 <section class="detail" id="add(org.apache.jmeter.gui.tree.JMeterTreeModel,java.lang.String)">
 <h3>add</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">add</span><wbr><span class="parameters">(<a href="tree/JMeterTreeModel.html" title="class in org.apache.jmeter.gui.tree">JMeterTreeModel</a>&nbsp;treeModel,
  <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;comment)</span></div>
 <div class="block">Add tree model copy to the history
  <p>
  This method relies on the rule that the record in history made AFTER
  change has been made to test plan</div>
 <dl class="notes">
 <dt>Parameters:</dt>
 <dd><code>treeModel</code> - JMeterTreeModel</dd>
 <dd><code>comment</code> - String</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="undo()">
 <h3>undo</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">undo</span>()</div>
 </section>
 </li>
 <li>
 <section class="detail" id="redo()">
 <h3>redo</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">redo</span>()</div>
 </section>
 </li>
 <li>
 <section class="detail" id="canRedo()">
 <h3>canRedo</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">canRedo</span>()</div>
 <dl class="notes">
 <dt>Returns:</dt>
 <dd>true if remaining items</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="canUndo()">
 <h3>canUndo</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">canUndo</span>()</div>
 <dl class="notes">
 <dt>Returns:</dt>
 <dd>true if not at first element</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="treeNodesChanged(javax.swing.event.TreeModelEvent)">
 <h3>treeNodesChanged</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">treeNodesChanged</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link">TreeModelEvent</a>&nbsp;tme)</span></div>
 <div class="block">Record the changes in the node as the undo step</div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html#treeNodesChanged(javax.swing.event.TreeModelEvent)" title="class or interface in javax.swing.event" class="external-link">treeNodesChanged</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html" title="class or interface in javax.swing.event" class="external-link">TreeModelListener</a></code></dd>
 <dt>Parameters:</dt>
 <dd><code>tme</code> - <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link"><code>TreeModelEvent</code></a> with event details</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="treeNodesInserted(javax.swing.event.TreeModelEvent)">
 <h3>treeNodesInserted</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">treeNodesInserted</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link">TreeModelEvent</a>&nbsp;tme)</span></div>
 <div class="block">Record adding nodes as the undo step</div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html#treeNodesInserted(javax.swing.event.TreeModelEvent)" title="class or interface in javax.swing.event" class="external-link">treeNodesInserted</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html" title="class or interface in javax.swing.event" class="external-link">TreeModelListener</a></code></dd>
 <dt>Parameters:</dt>
 <dd><code>tme</code> - <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link"><code>TreeModelEvent</code></a> with event details</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="treeNodesRemoved(javax.swing.event.TreeModelEvent)">
 <h3>treeNodesRemoved</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">treeNodesRemoved</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link">TreeModelEvent</a>&nbsp;tme)</span></div>
 <div class="block">Record deleting nodes as the undo step</div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html#treeNodesRemoved(javax.swing.event.TreeModelEvent)" title="class or interface in javax.swing.event" class="external-link">treeNodesRemoved</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html" title="class or interface in javax.swing.event" class="external-link">TreeModelListener</a></code></dd>
 <dt>Parameters:</dt>
 <dd><code>tme</code> - <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link"><code>TreeModelEvent</code></a> with event details</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="treeStructureChanged(javax.swing.event.TreeModelEvent)">
 <h3>treeStructureChanged</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">treeStructureChanged</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link">TreeModelEvent</a>&nbsp;tme)</span></div>
 <div class="block">Record some other change</div>
 <dl class="notes">
 <dt>Specified by:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html#treeStructureChanged(javax.swing.event.TreeModelEvent)" title="class or interface in javax.swing.event" class="external-link">treeStructureChanged</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelListener.html" title="class or interface in javax.swing.event" class="external-link">TreeModelListener</a></code></dd>
 <dt>Parameters:</dt>
 <dd><code>tme</code> - <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/swing/event/TreeModelEvent.html" title="class or interface in javax.swing.event" class="external-link"><code>TreeModelEvent</code></a> with event details</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="isEnabled()">
 <h3>isEnabled</h3>
 <div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">boolean</span>&nbsp;<span class="element-name">isEnabled</span>()</div>
 <dl class="notes">
 <dt>Returns:</dt>
 <dd>true if history is enabled</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="registerHistoryListener(org.apache.jmeter.gui.UndoHistory.HistoryListener)">
 <h3>registerHistoryListener</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name">registerHistoryListener</span><wbr><span class="parameters">(<a href="UndoHistory.HistoryListener.html" title="interface in org.apache.jmeter.gui">UndoHistory.HistoryListener</a>&nbsp;listener)</span></div>
 <div class="block">Register HistoryListener</div>
 <dl class="notes">
 <dt>Parameters:</dt>
 <dd><code>listener</code> - to add to our listeners</dd>
 </dl>
 </section>
 </li>
 </ul>
 </section>
 </li>
 </ul>
 </section>
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