IND$FILE receiving

j3270/src/main/java/org/pubvm/j3270/J3270App.java

@@ -6,6 +6,8 @@ import org.lib3270j.listener.ScreenUpdateListener;
 import org.pubvm.j3270.ui.ConnectDialog;
 import org.pubvm.j3270.ui.StatusBar;
 import org.pubvm.j3270.ui.TerminalPanel;
+import org.pubvm.j3270.ft.FileTransfer;
+import org.pubvm.j3270.ft.FileTransferDialog;
 
 import javax.swing.*;
 import java.awt.*;
@@ -31,6 +33,8 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
     private String lastHost = "";
     private int lastPort = 23;
 
+    private FileTransfer fileTransfer;
+
     public J3270App() {
         super("j3270 — Java TN3270 Terminal Emulator");
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
@@ -125,6 +129,8 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                 client.reset();
             terminalPanel.repaint();
         }));
+        actionsMenu.addSeparator();
+        actionsMenu.add(createMenuItem("File Transfer...", KeyEvent.VK_T, this::showFileTransferDialog));
         menuBar.add(actionsMenu);
 
         // Help menu
@@ -154,6 +160,69 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         return item;
     }
 
+    private void showFileTransferDialog() {
+        if (client == null) {
+            JOptionPane.showMessageDialog(this, "Connect to a host before using File Transfer.",
+                    "Not Connected", JOptionPane.WARNING_MESSAGE);
+            return;
+        }
+
+        if (fileTransfer == null) {
+            fileTransfer = new FileTransfer(client, new FileTransfer.FileTransferCallback() {
+                private ProgressMonitor monitor;
+
+                @Override
+                public void onTransferStarted() {
+                    monitor = new ProgressMonitor(J3270App.this, "Starting IND$FILE transfer...",
+                            "Waiting for host...", 0, 100);
+                    monitor.setMillisToDecideToPopup(0);
+                    monitor.setMillisToPopup(0);
+                    
+                    // Start a timer to check for manual cancellation
+                    Timer cancelCheckTimer = new Timer(500, e -> {
+                        if (monitor != null && monitor.isCanceled() && fileTransfer != null) {
+                            fileTransfer.cancel();
+                            ((Timer)e.getSource()).stop();
+                        }
+                    });
+                    cancelCheckTimer.start();
+                }
+
+                @Override
+                public void onTransferRunning() {
+                    if (monitor != null) {
+                        monitor.setNote("Transferring data...");
+                    }
+                }
+
+                @Override
+                public void onBytesTransferred(long bytes) {
+                    if (monitor != null) {
+                        monitor.setNote(bytes + " bytes transferred");
+                        // We don't always know max size in IND$FILE, so we just pulse/update note
+                    }
+                }
+
+                @Override
+                public void onTransferComplete(String message) {
+                    if (monitor != null) monitor.close();
+                    monitor = null;
+                    JOptionPane.showMessageDialog(J3270App.this, message, "Transfer Complete", JOptionPane.INFORMATION_MESSAGE);
+                }
+
+                @Override
+                public void onTransferAborted(String error) {
+                    if (monitor != null) monitor.close();
+                    monitor = null;
+                    JOptionPane.showMessageDialog(J3270App.this, "Transfer Failed: " + error, "Transfer Error", JOptionPane.ERROR_MESSAGE);
+                }
+            });
+        }
+
+        FileTransferDialog dialog = new FileTransferDialog(this, fileTransfer);
+        dialog.setVisible(true);
+    }
+
     // ========== Connection management ==========
 
     private void showConnectDialog() {
@@ -221,6 +290,10 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
 
     private void disconnect() {
         if (client != null) {
+            if (fileTransfer != null) {
+                fileTransfer.cancel();
+                fileTransfer = null;
+            }
             client.disconnect();
             client = null;
             terminalPanel.setClient(null);
@@ -280,6 +353,9 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
             if (client != null) {
                 client.getInputProcessor().setKeyboardLocked(false);
             }
+            if (fileTransfer != null) {
+                fileTransfer.onScreenUpdated();
+            }
             terminalPanel.repaint();
             statusBar.updateStatus();
         });