refresh panels

src/main/java/cz/kamma/kfmanager/config/AppConfig.java

@@ -464,6 +464,14 @@ public class AppConfig {
     public void setIgnoreLeadingDot(boolean enabled) {
         properties.setProperty("global.sort.ignore.leadingdot", String.valueOf(enabled));
     }
+
+    public int getAutoRefreshInterval() {
+        return Integer.parseInt(properties.getProperty("panel.autoRefreshInterval", "2000"));
+    }
+
+    public void setAutoRefreshInterval(int interval) {
+        properties.setProperty("panel.autoRefreshInterval", String.valueOf(interval));
+    }
     
     // -- Multiple sort criteria persistence
     public java.util.List<String> getMultipleSortCriteria() {

src/main/java/cz/kamma/kfmanager/model/FileItem.java

@@ -69,6 +69,19 @@ public class FileItem {
         return isDirectory;
     }
 
+    /**
+     * Check if this item is the same as another item based on metadata.
+     */
+    public boolean isSameAs(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        FileItem other = (FileItem) obj;
+        return isDirectory == other.isDirectory &&
+               size == other.size &&
+               (name != null ? name.equals(other.name) : other.name == null) &&
+               (modified != null ? modified.getTime() == other.modified.getTime() : other.modified == null);
+    }
+
     public Icon getIcon() {
         return icon;
     }

src/main/java/cz/kamma/kfmanager/ui/FilePanel.java

@@ -717,6 +717,13 @@ public class FilePanel extends JPanel {
             updatePathField();
         }
     }
+
+    public void refresh(boolean requestFocus) {
+        FilePanelTab tab = getCurrentTab();
+        if (tab != null) {
+            tab.refresh(requestFocus);
+        }
+    }
     
     public void toggleSelectionAndMoveDown() {
         FilePanelTab tab = getCurrentTab();

src/main/java/cz/kamma/kfmanager/ui/FilePanelTab.java

@@ -861,29 +861,7 @@ public class FilePanelTab extends JPanel {
         lastValidRow = 0;
         lastValidBriefColumn = 0;
         
-        File[] files = directory.listFiles();
-        List<FileItem> items = new ArrayList<>();
-        
-        File parent = directory.getParentFile();
-        if (parent != null) {
-            items.add(new FileItem(parent) {
-                @Override
-                public String getName() {
-                    return "..";
-                }
-            });
-        }
-        
-        if (files != null && files.length > 0) {
-            Arrays.sort(files, Comparator
-                    .comparing((File f) -> !f.isDirectory())
-                    .thenComparing(File::getName, String.CASE_INSENSITIVE_ORDER));
-            
-            for (File file : files) {
-                items.add(new FileItem(file));
-            }
-        }
-        
+        List<FileItem> items = createFileItemList(directory);
         tableModel.setItems(items);
         
         if (viewMode == ViewMode.BRIEF) {
@@ -912,11 +890,11 @@ public class FilePanelTab extends JPanel {
             if (autoSelectFirst && fileTable.getRowCount() > 0) {
                 int startIndex = 0;
                 fileTable.setRowSelectionInterval(startIndex, startIndex);
-                if (requestFocus) {
-                    SwingUtilities.invokeLater(() -> {
-                        try { fileTable.requestFocusInWindow(); } catch (Exception ignore) {}
-                    });
-                }
+            }
+            if (requestFocus) {
+                SwingUtilities.invokeLater(() -> {
+                    try { fileTable.requestFocusInWindow(); } catch (Exception ignore) {}
+                });
             }
         }
         
@@ -928,6 +906,94 @@ public class FilePanelTab extends JPanel {
         }
     }
 
+    /**
+     * Refresh the current directory while attempting to preserve selection and focus.
+     */
+    public void refresh(boolean requestFocus) {
+        List<FileItem> newItems = createFileItemList(currentDirectory);
+        if (isSameContent(newItems, tableModel.items)) {
+            return;
+        }
+
+        FileItem focused = getFocusedItem();
+        final String focusedName = (focused != null) ? focused.getName() : null;
+        
+        final List<String> markedNames = new ArrayList<>();
+        for (FileItem item : tableModel.items) {
+            if (item.isMarked()) {
+                markedNames.add(item.getName());
+            }
+        }
+
+        loadDirectory(currentDirectory, false, requestFocus);
+        
+        SwingUtilities.invokeLater(() -> {
+            // Restore marks
+            for (FileItem item : tableModel.items) {
+                if (markedNames.contains(item.getName())) {
+                    item.setMarked(true);
+                }
+            }
+            
+            // Restore focus
+            if (focusedName != null) {
+                for (int i = 0; i < tableModel.items.size(); i++) {
+                    if (tableModel.items.get(i).getName().equals(focusedName)) {
+                        int row = i;
+                        if (viewMode == ViewMode.BRIEF) {
+                            int selRow = row % tableModel.briefRowsPerColumn;
+                            int selCol = row / tableModel.briefRowsPerColumn;
+                            briefCurrentColumn = selCol;
+                            fileTable.getSelectionModel().setSelectionInterval(selRow, selRow);
+                            fileTable.getColumnModel().getSelectionModel().setSelectionInterval(selCol, selCol);
+                            fileTable.scrollRectToVisible(fileTable.getCellRect(selRow, selCol, true));
+                        } else {
+                            fileTable.getSelectionModel().setSelectionInterval(row, row);
+                            fileTable.scrollRectToVisible(fileTable.getCellRect(row, 0, true));
+                        }
+                        break;
+                    }
+                }
+            }
+            fileTable.repaint();
+            updateStatus();
+        });
+    }
+
+    private List<FileItem> createFileItemList(File directory) {
+        if (directory == null || !directory.isDirectory()) {
+            return new ArrayList<>();
+        }
+        File[] files = directory.listFiles();
+        List<FileItem> items = new ArrayList<>();
+        File parent = directory.getParentFile();
+        if (parent != null) {
+            items.add(new FileItem(parent) {
+                @Override
+                public String getName() {
+                    return "..";
+                }
+            });
+        }
+        if (files != null && files.length > 0) {
+            Arrays.sort(files, Comparator
+                    .comparing((File f) -> !f.isDirectory())
+                    .thenComparing(File::getName, String.CASE_INSENSITIVE_ORDER));
+            for (File file : files) {
+                items.add(new FileItem(file));
+            }
+        }
+        return items;
+    }
+
+    private boolean isSameContent(List<FileItem> list1, List<FileItem> list2) {
+        if (list1.size() != list2.size()) return false;
+        for (int i = 0; i < list1.size(); i++) {
+            if (!list1.get(i).isSameAs(list2.get(i))) return false;
+        }
+        return true;
+    }
+
     /**
      * Cleanup previous archive temp dir when navigating away from it.
      */

src/main/java/cz/kamma/kfmanager/ui/MainWindow.java

@@ -28,6 +28,7 @@ public class MainWindow extends JFrame {
     private JComboBox<String> commandLine;
     private JLabel cmdLabel;
     private AppConfig config;
+    private Timer autoRefreshTimer;
     
     public MainWindow() {
         super("KF Manager v" + MainApp.APP_VERSION);
@@ -55,6 +56,14 @@ public class MainWindow extends JFrame {
                 MainWindow.this.saveConfigAndExit();
             }
         });
+
+        // Refresh panels when application gains focus
+        addWindowFocusListener(new WindowAdapter() {
+            @Override
+            public void windowGainedFocus(WindowEvent e) {
+                refreshPanels();
+            }
+        });
         
     // After start, set focus and selection to the active panel
         String initialActiveSide = config.getActivePanel();
@@ -69,6 +78,9 @@ public class MainWindow extends JFrame {
             updateActivePanelBorder();
             updateCommandLinePrompt();
         });
+
+        // Setup auto-refresh timer from config
+        updateAutoRefreshTimer();
     }
     
     private void loadAppIcon() {
@@ -399,6 +411,18 @@ public class MainWindow extends JFrame {
         
         toolBar.removeAll();
         
+        // Refresh button
+        JButton btnRefresh = new JButton("↻");
+        btnRefresh.setToolTipText("Refresh active panel");
+        btnRefresh.setFocusable(false);
+        btnRefresh.addActionListener(e -> {
+            if (activePanel != null && activePanel.getCurrentDirectory() != null) {
+                activePanel.refresh(true);
+            }
+        });
+        toolBar.add(btnRefresh);
+        toolBar.addSeparator();
+        
     // Button for BRIEF mode
     JButton btnBrief = new JButton("☰ Brief");
     btnBrief.setToolTipText("Brief mode - multiple columns (Ctrl+F1)");
@@ -725,6 +749,7 @@ public class MainWindow extends JFrame {
      * Apply appearance settings (font/colors) from config to UI components.
      */
     private void applyAppearanceSettings() {
+        updateAutoRefreshTimer();
         Font gfont = config.getGlobalFont();
         if (gfont != null) {
             // Apply to toolbars, buttons and tables
@@ -1749,16 +1774,14 @@ public class MainWindow extends JFrame {
     }
     
     /**
-     * Refresh both panels
+     * Refresh both panels while preserving selection and active panel focus.
      */
     private void refreshPanels() {
-        // Refresh is now automatic upon changes
-        // If manual refresh is needed, we can call loadDirectory
-        if (leftPanel.getCurrentDirectory() != null) {
-            leftPanel.loadDirectory(leftPanel.getCurrentDirectory());
+        if (leftPanel != null && leftPanel.getCurrentDirectory() != null) {
+            leftPanel.refresh(activePanel == leftPanel);
         }
-        if (rightPanel.getCurrentDirectory() != null) {
-            rightPanel.loadDirectory(rightPanel.getCurrentDirectory());
+        if (rightPanel != null && rightPanel.getCurrentDirectory() != null) {
+            rightPanel.refresh(activePanel == rightPanel);
         }
     }
     
@@ -2177,6 +2200,9 @@ public class MainWindow extends JFrame {
      * Save configuration and exit application
      */
     private void saveConfigAndExit() {
+        if (autoRefreshTimer != null) {
+            autoRefreshTimer.stop();
+        }
     // Save window state
         config.saveWindowState(this);
         
@@ -2257,4 +2283,17 @@ public class MainWindow extends JFrame {
             activePanel.getFileTable().requestFocusInWindow();
         }
     }
+
+    private void updateAutoRefreshTimer() {
+        if (autoRefreshTimer != null) {
+            autoRefreshTimer.stop();
+        }
+        int interval = config.getAutoRefreshInterval();
+        autoRefreshTimer = new Timer(interval, e -> {
+            if (activePanel != null && activePanel.getCurrentDirectory() != null) {
+                activePanel.refresh(false);
+            }
+        });
+        autoRefreshTimer.start();
+    }
 }

src/main/java/cz/kamma/kfmanager/ui/SettingsDialog.java

@@ -209,6 +209,8 @@ public class SettingsDialog extends JDialog {
                 try {
                     JSpinner mws = (JSpinner) behaviorHolder.getClientProperty("mouseWheelSteps");
                     if (mws != null) config.setBriefMouseWheelSteps((Integer) mws.getValue());
+                    JSpinner ari = (JSpinner) behaviorHolder.getClientProperty("autoRefreshInterval");
+                    if (ari != null) config.setAutoRefreshInterval((Integer) ari.getValue());
                 } catch (Exception ignore) {}
             }
 
@@ -436,8 +438,17 @@ public class SettingsDialog extends JDialog {
         gbc.gridx = 1; gbc.gridy = row++; gbc.weightx = 1.0;
         grid.add(mwSteps, gbc);
 
+        // Auto-refresh interval
+        gbc.gridx = 0; gbc.gridy = row; gbc.weightx = 0.0;
+        grid.add(new JLabel("Auto-refresh interval (ms):"), gbc);
+
+        JSpinner refreshInt = new JSpinner(new SpinnerNumberModel(config.getAutoRefreshInterval(), 100, 600000, 100));
+        gbc.gridx = 1; gbc.gridy = row++; gbc.weightx = 1.0;
+        grid.add(refreshInt, gbc);
+
         p.add(grid, BorderLayout.NORTH);
         p.putClientProperty("mouseWheelSteps", mwSteps);
+        p.putClientProperty("autoRefreshInterval", refreshInt);
         panels.put("Behavior", p);
         return p;
     }