Add autoscroll, autoscroll stop on 1st failed, preferred width and goto selected sampler name in ViewResultsTree listener

bin/jmeter.properties

@@ -1217,6 +1217,15 @@ view.results.tree.renderers_order=.RenderAsText,.RenderAsRegexp,.RenderAsBoundar
 # Set to 0 to store all results (might consume a lot of memory)
 #view.results.tree.max_results=500
 
+# Set to true to enable by default the checkbox for auto scrolling.
+#view.results.tree.autoscroll=true
+
+# Set to true to enable by default the checkbox for stop auto scrolling on 1st error.
+#view.results.tree.autostop=true
+
+# Default width of the scroll view
+#view.results.tree.width=250
+
 # Maximum size of Document that can be parsed by Tika engine; default=10 * 1024 * 1024 (10 MB)
 # Set to 0 to disable the size check
 #document.max_size=0

src/components/src/main/java/org/apache/jmeter/visualizers/SamplerResultTab.java

@@ -87,7 +87,7 @@ public abstract class SamplerResultTab implements ResultRenderer {
     private static final Logger LOGGER = LoggerFactory.getLogger(SamplerResultTab.class);
     // N.B. these are not multi-threaded, so don't make it static
     private final DateTimeFormatter dateFormat = DateTimeFormatter
-            .ofPattern("yyyy-MM-dd HH:mm:ss z")  // ISO format $NON-NLS-1$
+            .ofPattern("yyyy-MM-dd HH:mm:ss.SSS O")  // ISO format $NON-NLS-1$
             .withZone(ZoneId.systemDefault());
 
     private static final String NL = "\n"; // $NON-NLS-1$
@@ -265,6 +265,10 @@ public void setupTabPane() {
                         .append(JMeterUtils
                                 .getResString("view_results_thread_name")).append(SPACE) //$NON-NLS-1$
                         .append(sampleResult.getThreadName()).append(NL);
+                statsBuff
+                        .append(JMeterUtils
+                                .getResString("view_results_sample_name")) //$NON-NLS-1$
+                        .append(sampleResult.getSampleLabel()).append(NL);
                 String startTime = dateFormat
                         .format(Instant.ofEpochMilli(sampleResult.getStartTime()));
                 statsBuff
@@ -363,6 +367,10 @@ public void setupTabPane() {
                 resultModel.addRow(new RowResult(
                         JMeterUtils.getParsedLabel("view_results_thread_name"), //$NON-NLS-1$
                         sampleResult.getThreadName()));
+                resultModel.addRow(new RowResult(
+                        JMeterUtils.getParsedLabel(
+                                "view_results_sample_name"), //$NON-NLS-1$
+                        sampleResult.getSampleLabel()));
                 resultModel.addRow(new RowResult(
                         JMeterUtils.getParsedLabel("view_results_sample_start"), //$NON-NLS-1$
                         startTime));

src/components/src/main/java/org/apache/jmeter/visualizers/ViewResultsFullVisualizer.java

@@ -21,6 +21,8 @@
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Dimension;
+import java.awt.FlowLayout;
+import java.awt.Rectangle;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.event.ItemEvent;
@@ -43,8 +45,10 @@
 import javax.swing.ComboBoxModel;
 import javax.swing.DefaultComboBoxModel;
 import javax.swing.ImageIcon;
+import javax.swing.JButton;
 import javax.swing.JCheckBox;
 import javax.swing.JComboBox;
+import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JSplitPane;
 import javax.swing.JTabbedPane;
@@ -116,6 +120,15 @@ public class ViewResultsFullVisualizer extends AbstractVisualizer
     private static final String VIEWERS_ORDER =
             JMeterUtils.getPropDefault("view.results.tree.renderers_order", ""); // $NON-NLS-1$ //$NON-NLS-2$
 
+    //default scroll checkbox status
+    private static final boolean SCROLL_CHECKBOX = JMeterUtils.getPropDefault("view.results.tree.autoscroll", true);
+
+    //default uncheck if failed scroll checkbox status
+    private static final boolean SCROLL_STOP_CHECKBOX = JMeterUtils.getPropDefault("view.results.tree.autostop", true);
+
+    // default tree scroll width
+    private static final int SCROLL_WIDTH = JMeterUtils.getPropDefault("view.results.tree.width", 300); // $NON-NLS-1$
+
     private static final int REFRESH_PERIOD = JMeterUtils.getPropDefault("jmeter.gui.refresh_period", 500);
 
     private static final ImageIcon imageSuccess = JMeterUtils.getImage(
@@ -138,6 +151,7 @@ public class ViewResultsFullVisualizer extends AbstractVisualizer
     private Object resultsObject = null;
     private TreeSelectionEvent lastSelectionEvent;
     private JCheckBox autoScrollCB;
+    private JCheckBox scrollStopCB;
     private final Queue<SampleResult> buffer = new ArrayDeque<>();
     private final int maxResults;
     private boolean dataChanged;
@@ -161,6 +175,11 @@ public void add(final SampleResult sample) {
             }
             buffer.add(sample);
             dataChanged = true;
+            if (!"true".equals(System.getProperty("java.awt.headless"))) {
+                if (!sample.isSuccessful() && autoScrollCB.isSelected() && scrollStopCB.isSelected()) {
+                    autoScrollCB.setSelected(false);
+                }
+            }
         }
     }
 
@@ -219,6 +238,7 @@ private void updateGui() {
         if (selectedPath != null) {
             jTree.setSelectionPath(selectedPath);
         }
+
         if (autoScrollCB.isSelected() && root.getChildCount() > 1) {
             jTree.scrollPathToVisible(new TreePath(new Object[] { root,
                     treeModel.getChild(root, root.getChildCount() - 1) }));
@@ -328,6 +348,8 @@ public void clearData() {
         }
         resultsRender.clearData();
         resultsObject = null;
+        autoScrollCB.setSelected(SCROLL_CHECKBOX);
+        scrollStopCB.setSelected(SCROLL_STOP_CHECKBOX);
     }
 
     /** {@inheritDoc} */
@@ -390,6 +412,44 @@ private void valueChanged(TreeSelectionEvent e, boolean forceRendering) {
             }
             Object userObject = node.getUserObject();
             resultsRender.setSamplerResult(userObject);
+
+            // Add Show Current Node button to the tab pane
+            if (rightSide.getTabCount() > 0) {
+                Component firstTab = rightSide.getComponentAt(0);
+                if (firstTab instanceof JPanel samplerResultTab) {
+                    samplerResultTab = (JPanel) firstTab;
+                    // Add button at the top of the sampler result panel
+                    JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
+                    JButton nodeInfoButton = new JButton(JMeterUtils.getResString("show_current_node")); // $NON-NLS-1$
+                    nodeInfoButton.addActionListener(e2 -> {
+                        // Get the currently selected node when button is clicked
+                        DefaultMutableTreeNode currentNode = (DefaultMutableTreeNode) jTree.getLastSelectedPathComponent();
+                        if (currentNode != null) {
+                            TreePath path = new TreePath(currentNode.getPath());
+                            // First expand the path to make sure all parent nodes are visible
+                            jTree.expandPath(path);
+                            // Get the bounds before scrolling
+                            Rectangle bounds = jTree.getPathBounds(path);
+                            if (bounds != null) {
+                                // Get the visible rectangle
+                                Rectangle visible = jTree.getVisibleRect();
+                                // Calculate the new viewport position to center the node
+                                int centerY = Math.max(0, bounds.y - (visible.height - bounds.height) / 2);
+                                // Create rectangle that will center the node
+                                Rectangle scrollTo = new Rectangle(0, centerY, 1, visible.height);
+                                jTree.scrollRectToVisible(scrollTo);
+                                // Ensure the node is selected and visible
+                                jTree.setSelectionPath(path);
+                                jTree.repaint();
+                            }
+                        }
+                    });
+                    buttonPanel.add(nodeInfoButton);
+                    samplerResultTab.add(buttonPanel, BorderLayout.NORTH);
+                    samplerResultTab.revalidate();
+                }
+            }
+
             resultsRender.setupTabPane(); // Processes Assertions
             // display a SampleResult
             if (userObject instanceof SampleResult sampleResult) {
@@ -429,15 +489,40 @@ private synchronized Component createLeftPanel() {
         jTree.setRootVisible(false);
         jTree.setShowsRootHandles(true);
         JScrollPane treePane = new JScrollPane(jTree);
-        treePane.setPreferredSize(new Dimension(200, 300));
 
         VerticalPanel leftPane = new VerticalPanel();
-        leftPane.add(treePane, BorderLayout.CENTER);
-        leftPane.add(createComboRender(), BorderLayout.NORTH);
+
+        // Add controls panel at the top
+        JPanel controlsPane = new JPanel(new FlowLayout(FlowLayout.LEFT));
+        controlsPane.add(createComboRender());
+        leftPane.add(controlsPane, BorderLayout.NORTH);
+
+        // Add tree panel in the center with proper sizing
+        JPanel treePanel = new JPanel(new BorderLayout());
+        treePanel.add(treePane, BorderLayout.CENTER);
+        leftPane.add(treePanel, BorderLayout.CENTER);
+
+        // Create bottom panel with checkbox
+        JPanel bottomPanel = new JPanel(new FlowLayout(FlowLayout.LEFT, 5, 0));
+
+        // Add autoscroll checkbox
         autoScrollCB = new JCheckBox(JMeterUtils.getResString("view_results_autoscroll")); // $NON-NLS-1$
-        autoScrollCB.setSelected(false);
+        autoScrollCB.setSelected(SCROLL_CHECKBOX);
         autoScrollCB.addItemListener(this);
-        leftPane.add(autoScrollCB, BorderLayout.SOUTH);
+        bottomPanel.add(autoScrollCB);
+
+        // Add autoscroll checkbox
+        scrollStopCB = new JCheckBox(JMeterUtils.getResString("view_results_scrollstop")); // $NON-NLS-1$
+        scrollStopCB.setSelected(SCROLL_STOP_CHECKBOX);
+        scrollStopCB.addItemListener(this);
+        bottomPanel.add(scrollStopCB);
+
+        leftPane.add(bottomPanel, BorderLayout.SOUTH);
+
+        // Ensure the left pane maintains its size during window resizing
+        leftPane.setMinimumSize(new Dimension(SCROLL_WIDTH, 0));
+        leftPane.setPreferredSize(new Dimension(SCROLL_WIDTH, 0));
+
         return leftPane;
     }
 
@@ -615,4 +700,9 @@ public Component getTreeCellRendererComponent(JTree tree, Object value,
     public void itemStateChanged(ItemEvent e) {
         // NOOP state is held by component
     }
+
+    @Override
+    public String[] getFileExts() {
+        return new String[] { ".jtl" };
+    }
 }

src/core/src/main/java/org/apache/jmeter/visualizers/gui/AbstractVisualizer.java

@@ -104,7 +104,7 @@ public abstract class AbstractVisualizer
     /** Logging. */
     private static final Logger log = LoggerFactory.getLogger(AbstractVisualizer.class);
 
-    /** File Extensions */
+    /** Default File Extensions */
     private static final String[] EXTS = { ".xml", ".jtl", ".csv" }; // $NON-NLS-1$ $NON-NLS-2$ $NON-NLS-3$
 
     /** A panel allowing results to be saved. */
@@ -150,7 +150,7 @@ public void actionPerformed(ActionEvent e) {
             d.setVisible(true);
         });
 
-        filePanel = new FilePanel(JMeterUtils.getResString("file_visualizer_output_file"), EXTS); // $NON-NLS-1$
+        filePanel = new FilePanel(JMeterUtils.getResString("file_visualizer_output_file"), getFileExts()); // $NON-NLS-1$
         filePanel.addChangeListener(this);
         filePanel.add(new JLabel(JMeterUtils.getResString("log_only"))); // $NON-NLS-1$
         filePanel.add(errorLogging);
@@ -345,4 +345,8 @@ public void clearGui(){
         super.clearGui();
         filePanel.clearGui();
     }
+
+    public String[] getFileExts() {
+            return EXTS;
+    }
 }

src/core/src/main/resources/org/apache/jmeter/resources/messages.properties

@@ -1401,8 +1401,9 @@ view_graph_tree_title=View Graph Tree
 view_results_assertion_error=Assertion error:
 view_results_assertion_failure=Assertion failure:
 view_results_assertion_failure_message=Assertion failure message:
-view_results_autoscroll=Scroll automatically
-view_results_childsamples=Child samples
+view_results_autoscroll=Auto scroll
+view_results_scrollstop=Stop scroll on error
+view_results_childsamples=Child samples?
 view_results_datatype=Data type ("text"|"bin"|""):
 view_results_desc=Shows the text results of sampling in tree form
 view_results_error_count=Error Count:
@@ -1461,6 +1462,7 @@ view_results_table_request_tab_raw=Raw
 view_results_table_result_tab_parsed=Parsed
 view_results_table_result_tab_raw=Raw
 view_results_thread_name=Thread Name:
+view_results_sample_name=Sample label:
 view_results_title=View Results
 view_results_tree_title=View Results Tree
 warning=Warning!
@@ -1545,3 +1547,4 @@ xpath2_extractor_match_number_failure=MatchNumber out of bonds \:
 you_must_enter_a_valid_number=You must enter a valid number
 zh_cn=Chinese (Simplified)
 zh_tw=Chinese (Traditional)
+show_current_node=Focus on selected node

xdocs/usermanual/properties_reference.xml

@@ -1552,6 +1552,18 @@ JMETER-SERVER</source>
     Can be switched off by setting the value to <code>-1</code>.<br/>
     Defaults to: <code>10000</code>
 </property>
+  <property name="view.results.tree.autoscroll">
+    Set to <code>true</code> to enable by default the checkbox for auto scrolling.<br/>
+    Defaults to: <code>true</code>
+  </property>
+  <property name="view.results.tree.autostop">
+    Set to <code>true</code> to enable by default the checkbox for stop auto scrolling on 1st error.<br/>
+    Defaults to: <code>true</code>
+  </property>
+  <property name="view.results.tree.width">
+    Default width of the scroll view.<br/>
+    Defaults to: <code>250</code>
+  </property>
 <property name="document.max_size">
     Maximum size (in bytes) of Document that can be parsed by Tika engine<br/>
     Set to zero to disable the size check.<br/>