picture viewer added

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

@@ -16,6 +16,7 @@ import java.nio.file.Files;
  */
 public class FileEditor extends JDialog {
     private JTextArea textArea;
+    private JScrollPane scrollPane;
     private File file;
     private AppConfig config;
     private boolean modified = false;
@@ -54,10 +55,14 @@ public class FileEditor extends JDialog {
         this.readOnly = readOnly;
         
         initComponents();
-    loadFile();
+        loadFile();
+        
+        // Final window positioning and visibility - only set default size if NOT an image
+        if (!isImageFile(file)) {
+            setSize(800, 600);
+            setLocationRelativeTo(parent);
+        }
         
-        setSize(800, 600);
-        setLocationRelativeTo(parent);
         // Intercept window close (X) so we run the same save-confirm flow as other close actions
         setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
         addWindowListener(new java.awt.event.WindowAdapter() {
@@ -250,7 +255,7 @@ public class FileEditor extends JDialog {
             });
         }
         
-        JScrollPane scrollPane = new JScrollPane(textArea);
+        scrollPane = new JScrollPane(textArea);
         add(scrollPane, BorderLayout.CENTER);
         // Status bar (position, selection)
         JPanel statusPanel = new JPanel(new BorderLayout());
@@ -385,6 +390,7 @@ public class FileEditor extends JDialog {
     }
 
     private void createMenuBar() {
+        if (isImageFile(file)) return;
         JMenuBar menuBar = new JMenuBar();
         
     // File menu
@@ -528,7 +534,7 @@ public class FileEditor extends JDialog {
         
         // ESC - Zavřít nebo skrýt hledání
         rootPane.registerKeyboardAction(e -> {
-            if (searchPanel.isVisible()) {
+            if (searchPanel != null && searchPanel.isVisible()) {
                 hideSearchPanel();
             } else {
                 closeEditor();
@@ -580,7 +586,9 @@ public class FileEditor extends JDialog {
         }, KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_DOWN_MASK | InputEvent.SHIFT_DOWN_MASK), JComponent.WHEN_IN_FOCUSED_WINDOW);
 
         // Hledání
-        rootPane.registerKeyboardAction(e -> showSearchPanel(),
+        rootPane.registerKeyboardAction(e -> {
+            if (!isImageFile(file)) showSearchPanel();
+        },
                 KeyStroke.getKeyStroke(KeyEvent.VK_F, InputEvent.CTRL_DOWN_MASK),
                 JComponent.WHEN_IN_FOCUSED_WINDOW);
 
@@ -771,6 +779,10 @@ public class FileEditor extends JDialog {
     }
     
     private void loadFile() {
+        if (isImageFile(file)) {
+            loadImage();
+            return;
+        }
         try {
             // Determine file size first to decide streaming vs full load
             long size = Files.size(file.toPath());
@@ -843,6 +855,79 @@ public class FileEditor extends JDialog {
         }
         return nonPrintable > (len / 4);
     }
+
+    private boolean isImageFile(File f) {
+        String name = f.getName().toLowerCase();
+        return name.endsWith(".jpg") || name.endsWith(".jpeg") || 
+               name.endsWith(".png") || name.endsWith(".gif") || 
+               name.endsWith(".bmp");
+    }
+
+    private void loadImage() {
+        try {
+            ImageIcon icon = new ImageIcon(file.getAbsolutePath());
+            if (icon.getImageLoadStatus() == MediaTracker.COMPLETE) {
+                JLabel label = new JLabel(icon);
+                label.setHorizontalAlignment(JLabel.CENTER);
+                scrollPane.setViewportView(label);
+                
+                statusPosLabel.setText(String.format("Obraz: %d x %d px", 
+                    icon.getIconWidth(), icon.getIconHeight()));
+                statusSelLabel.setText(String.format("Velikost: %s", formatSize(file.length())));
+                
+                // Adjust window size based on image size
+                adjustWindowSizeForImage(icon.getIconWidth(), icon.getIconHeight());
+                
+                // Disable search and hex for images
+                if (northPanel != null) {
+                    searchPanel.setVisible(false);
+                    if (hexControlPanel != null) hexControlPanel.setVisible(false);
+                }
+            } else {
+                textArea.setText("Chyba: Nepodařilo se načíst obrázek.");
+            }
+        } catch (Exception e) {
+            textArea.setText("Chyba při načítání obrázku: " + e.getMessage());
+        }
+    }
+
+    private void adjustWindowSizeForImage(int imgWidth, int imgHeigth) {
+        // First pack to get valid insets
+        pack();
+        
+        // Get screen size
+        GraphicsConfiguration gc = getGraphicsConfiguration();
+        Rectangle screenBounds = gc.getBounds();
+        Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets(gc);
+        
+        int maxW = screenBounds.width - screenInsets.left - screenInsets.right - 20;
+        int maxH = screenBounds.height - screenInsets.top - screenInsets.bottom - 20;
+
+        // Use actual insets from title bar and borders after pack()
+        Insets winInsets = getInsets();
+        // Add space for title bar (top), status bar (bottom), and borders + 15px extra
+        int winW = imgWidth + winInsets.left + winInsets.right + 15;
+        int winH = imgHeigth + winInsets.top + winInsets.bottom + statusPosLabel.getParent().getHeight() + 15;
+
+        if (winW > maxW) winW = maxW;
+        if (winH > maxH) winH = maxH;
+        
+        // Ensure minimum size
+        if (winW < 400) winW = 400;
+        if (winH < 300) winH = 300;
+
+        setPreferredSize(new Dimension(winW, winH));
+        setSize(winW, winH);
+        validate();
+        setLocationRelativeTo(getOwner());
+    }
+
+    private String formatSize(long size) {
+        if (size < 1024) return size + " B";
+        int exp = (int) (Math.log(size) / Math.log(1024));
+        String pre = "KMGTPE".charAt(exp-1) + "";
+        return String.format("%.1f %sB", size / Math.pow(1024, exp), pre);
+    }
     
     private void saveFile() {
         try {