Resize debugging

j3270/src/main/java/haus/nightmare/j3270/J3270App.java

@@ -806,7 +806,19 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
         String tlsIndicator = config.isUseTls() ? (config.isTlsVerifyCert() ? " [TLS]" : " [TLS/Unverified]") : "";
         setTitle("j3270 — " + config.getHost() + ":" + config.getPort() + tlsIndicator);
 
-        terminalPanel.guardedPack();
+        int targetRows = 24;
+        int targetCols = 80;
+        TerminalModel model = config.getModel();
+        if (model != null) {
+            if (model.isDynamic()) {
+                targetRows = config.getDynamicRows();
+                targetCols = config.getDynamicCols();
+            } else {
+                targetRows = model.getAlternateRows();
+                targetCols = model.getAlternateCols();
+            }
+        }
+        terminalPanel.packForModel(targetRows, targetCols);
 
         new Thread(() -> {
             try {
@@ -903,7 +915,8 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
                 String dev = (client != null && client.getTelnetFSM() != null && client.getTelnetFSM().getConnectedLu() != null) ?
                         " [" + client.getTelnetFSM().getConnectedLu() + "]" : "";
                 setTitle("j3270 — " + lastHost + ":" + lastPort + tlsIndicator + dev);
-                terminalPanel.guardedPack();
+                terminalPanel.revalidate();
+                terminalPanel.repaint();
                 terminalPanel.requestFocusInWindow();
             }
         });
@@ -954,7 +967,8 @@ public class J3270App extends JFrame implements ConnectionListener, ScreenUpdate
     @Override
     public void onScreenSizeChanged(int rows, int cols) {
         SwingUtilities.invokeLater(() -> {
-            terminalPanel.guardedPack();
+            terminalPanel.revalidate();
+            terminalPanel.repaint();
             statusBar.updateStatus();
         });
     }

j3270/src/main/java/haus/nightmare/j3270/ui/SettingsDialog.java

@@ -11,12 +11,16 @@ import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.DefaultTableCellRenderer;
 import javax.swing.table.JTableHeader;
 import javax.swing.border.LineBorder;
 import javax.swing.border.TitledBorder;
+import haus.nightmare.j3270.storage.HostStorage;
+import haus.nightmare.j3270.storage.SavedHost;
 
 public class SettingsDialog extends JDialog {
 
@@ -58,8 +62,7 @@ public class SettingsDialog extends JDialog {
     // Connection tab
     private JComboBox<Settings.StartupBehavior> startupBehaviorBox;
     private JPanel autoConnectPanel;
-    private JTextField hostField;
+    private JComboBox<SavedHost> savedHostBox;
-    private JTextField portField;
     private JCheckBox autoReconnectCheck;
     private JSpinner dynamicRowsSpinner;
     private JSpinner dynamicColsSpinner;
@@ -588,22 +591,33 @@ public class SettingsDialog extends JDialog {
         acGbc.insets = new Insets(5, 5, 5, 5);
         acGbc.anchor = GridBagConstraints.WEST;
 
-        JLabel hostLabel = new JLabel("Host:");
+        JLabel savedConnLabel = new JLabel("Saved Connection:");
         acGbc.gridx = 0;
         acGbc.gridy = 0;
-        autoConnectPanel.add(hostLabel, acGbc);
+        autoConnectPanel.add(savedConnLabel, acGbc);
 
-        hostField = new JTextField(Settings.getAutoConnectHost(), 15);
+        savedHostBox = new JComboBox<>();
+        savedHostBox.setRenderer(new DefaultListCellRenderer() {
+            @Override
+            public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
+                super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
+                if (value instanceof SavedHost) {
+                    SavedHost sh = (SavedHost) value;
+                    if (sh.getName() != null && !sh.getName().trim().isEmpty()) {
+                        setText(sh.getName() + " (" + sh.getHost() + ":" + sh.getPort() + ")");
+                    } else {
+                        setText(sh.getHost() + ":" + sh.getPort());
+                    }
+                } else if (value == null) {
+                    setText("(No saved connections)");
+                }
+                return this;
+            }
+        });
+        refreshSavedHostsBox();
         acGbc.gridx = 1;
-        autoConnectPanel.add(hostField, acGbc);
+        acGbc.fill = GridBagConstraints.HORIZONTAL;
-
+        autoConnectPanel.add(savedHostBox, acGbc);
-        JLabel portLabel = new JLabel("Port:");
-        acGbc.gridx = 2;
-        autoConnectPanel.add(portLabel, acGbc);
-
-        portField = new JTextField(String.valueOf(Settings.getAutoConnectPort()), 4);
-        acGbc.gridx = 3;
-        autoConnectPanel.add(portField, acGbc);
 
         gbc.gridx = 0;
         gbc.gridy = 1;
@@ -658,6 +672,30 @@ public class SettingsDialog extends JDialog {
         return panel;
     }
 
+    private void refreshSavedHostsBox() {
+        if (savedHostBox == null) return;
+        savedHostBox.removeAllItems();
+        List<SavedHost> savedHosts = HostStorage.getSavedHosts();
+        SavedHost currentAutoHost = HostStorage.getAutoConnectHost();
+        SavedHost toSelect = null;
+        for (SavedHost sh : savedHosts) {
+            savedHostBox.addItem(sh);
+            if (currentAutoHost != null && Objects.equals(sh.getId(), currentAutoHost.getId())) {
+                toSelect = sh;
+            }
+        }
+        if (toSelect != null) {
+            savedHostBox.setSelectedItem(toSelect);
+            savedHostBox.setEnabled(true);
+        } else if (!savedHosts.isEmpty()) {
+            savedHostBox.setSelectedIndex(0);
+            savedHostBox.setEnabled(true);
+        } else {
+            savedHostBox.addItem(null);
+            savedHostBox.setEnabled(false);
+        }
+    }
+
     private JPanel createEntryAssistPanel() {
         JPanel panel = new JPanel();
         panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
@@ -1187,11 +1225,32 @@ public class SettingsDialog extends JDialog {
                 if (behavior != null) {
                     Settings.setStartupBehavior(behavior);
                 }
-                if (behavior == Settings.StartupBehavior.AUTO_CONNECT && hostField != null && portField != null) {
+                if (behavior == Settings.StartupBehavior.AUTO_CONNECT && savedHostBox != null) {
-                    Settings.setAutoConnectHost(hostField.getText().trim());
+                    Object sel = savedHostBox.getSelectedItem();
-                    try {
+                    if (sel instanceof SavedHost) {
-                        Settings.setAutoConnectPort(Integer.parseInt(portField.getText().trim()));
+                        SavedHost selected = (SavedHost) sel;
-                    } catch (NumberFormatException ignored) {
+                        List<SavedHost> hosts = HostStorage.getSavedHosts();
+                        for (SavedHost h : hosts) {
+                            h.setAutoConnect(Objects.equals(h.getId(), selected.getId()));
+                        }
+                        HostStorage.saveAll(hosts);
+                        Settings.setAutoConnectHost(selected.getHost());
+                        Settings.setAutoConnectPort(selected.getPort());
+                        Settings.setAutoConnectTls(selected.isUseTls());
+                        Settings.setAutoConnectVerifyCert(selected.isTlsVerifyCert());
+                        Settings.setAutoConnectTn3270e(selected.isTn3270e());
+                    }
+                } else if (behavior != Settings.StartupBehavior.AUTO_CONNECT) {
+                    List<SavedHost> hosts = HostStorage.getSavedHosts();
+                    boolean modified = false;
+                    for (SavedHost h : hosts) {
+                        if (h.isAutoConnect()) {
+                            h.setAutoConnect(false);
+                            modified = true;
+                        }
+                    }
+                    if (modified) {
+                        HostStorage.saveAll(hosts);
                     }
                 }
             }
@@ -1371,12 +1430,7 @@ public class SettingsDialog extends JDialog {
                 autoConnectPanel.setVisible(startupBehaviorBox.getSelectedItem() == Settings.StartupBehavior.AUTO_CONNECT);
             }
         }
-        if (hostField != null) {
+        refreshSavedHostsBox();
-            hostField.setText(Settings.getAutoConnectHost());
-        }
-        if (portField != null) {
-            portField.setText(String.valueOf(Settings.getAutoConnectPort()));
-        }
         if (autoReconnectCheck != null) {
             autoReconnectCheck.setSelected(Settings.getAutoConnectAutoReconnect());
         }
@@ -1494,6 +1548,10 @@ public class SettingsDialog extends JDialog {
         return btnExport;
     }
 
+    public JComboBox<SavedHost> getSavedHostBox() {
+        return savedHostBox;
+    }
+
     // ========== Export Config ==========
 
     private void exportConfig() {

j3270/src/main/java/haus/nightmare/j3270/ui/TerminalPanel.java

@@ -29,7 +29,7 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
     int cellHeight;
     private int fontAscent;
     private int fontDescent;
-    private int padding = 4;
+    private int padding = 1;
     private int currentFontSize = 16;
 
     // Cursor state
@@ -96,6 +96,8 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
     private long lastGraphicsUpdateCount = -1;
     private java.awt.image.BufferedImage cachedGraphicsImage = null;
     private boolean resizeGuard = false;
+    private Integer targetModelRows = null;
+    private Integer targetModelCols = null;
     private StatusBar statusBar = null;
 
     // ========== Phase 25: Hotspots & Mouse Wheel ==========
@@ -134,13 +136,21 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
 
     /**
      * Compute the horizontal render offset to center the grid within the panel.
+     * The left bound of the window is the left bound of the left cells when constrained.
+     * Only if the window is too big is there blank space on the left, and it is equal
+     * to or less than the space on the right at all times.
      */
     int getRenderOffsetX() {
         int termCols = 80;
-        if (client != null) termCols = client.getScreenBuffer().getDisplayCols();
+        if (client != null && client.getScreenBuffer() != null) {
+            termCols = client.getScreenBuffer().getDisplayCols();
+        }
         int gridW = termCols * cellWidth;
         int extra = getWidth() - gridW;
-        return Math.max(padding, extra / 2);
+        if (extra > 0) {
+            return extra / 2;
+        }
+        return 0;
     }
 
     /**
@@ -148,10 +158,15 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
      */
     int getRenderOffsetY() {
         int termRows = 24;
-        if (client != null) termRows = client.getScreenBuffer().getDisplayRows();
+        if (client != null && client.getScreenBuffer() != null) {
+            termRows = client.getScreenBuffer().getDisplayRows();
+        }
         int gridH = termRows * cellHeight;
         int extra = getHeight() - gridH;
-        return Math.max(padding, extra / 2);
+        if (extra > 0) {
+            return extra / 2;
+        }
+        return 0;
     }
 
     // Default Host color mapping aligned 1:1 with IBM Host On-Demand ColorRemapModel3270
@@ -1017,6 +1032,33 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
     }
 
 
+    public void packForModel(int modelRows, int modelCols) {
+        if (isDisplayable() && !SwingUtilities.isEventDispatchThread()) {
+            SwingUtilities.invokeLater(() -> packForModel(modelRows, modelCols));
+            return;
+        }
+        resizeGuard = true;
+        updateCellSize();
+        this.targetModelRows = modelRows;
+        this.targetModelCols = modelCols;
+        revalidate();
+        Container top = getTopLevelAncestor();
+        if (top instanceof java.awt.Window) {
+            java.awt.Window win = (java.awt.Window) top;
+            if (win instanceof java.awt.Frame) {
+                if ((((java.awt.Frame) win).getExtendedState() & java.awt.Frame.MAXIMIZED_BOTH) == 0) {
+                    win.pack();
+                }
+            } else {
+                win.pack();
+            }
+        }
+        this.targetModelRows = null;
+        this.targetModelCols = null;
+        repaint();
+        SwingUtilities.invokeLater(() -> resizeGuard = false);
+    }
+
     public void guardedPack() {
         if (isDisplayable() && !SwingUtilities.isEventDispatchThread()) {
             SwingUtilities.invokeLater(this::guardedPack);
@@ -1025,12 +1067,35 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
         resizeGuard = true;
         revalidate();
         Container top = getTopLevelAncestor();
-        if (top instanceof java.awt.Frame) {
+        if (top instanceof java.awt.Window) {
-            if ((((java.awt.Frame) top).getExtendedState() & java.awt.Frame.MAXIMIZED_BOTH) == 0) {
+            java.awt.Window win = (java.awt.Window) top;
-                ((java.awt.Window) top).pack();
+            if (win.isShowing()) {
+                int termCols = 80;
+                int termRows = 24;
+                if (client != null && client.getScreenBuffer() != null) {
+                    termCols = client.getScreenBuffer().getDisplayCols();
+                    termRows = client.getScreenBuffer().getDisplayRows();
+                }
+                int gridW = termCols * cellWidth;
+                int gridH = termRows * cellHeight;
+                Dimension winSize = win.getSize();
+                Dimension winPref = win.getPreferredSize();
+                boolean tooSmall = winSize.width < winPref.width || winSize.height < winPref.height
+                        || (getWidth() > 0 && getWidth() < gridW)
+                        || (getHeight() > 0 && getHeight() < gridH);
+                if (tooSmall) {
+                    repaint();
+                    SwingUtilities.invokeLater(() -> resizeGuard = false);
+                    return;
+                }
+            }
+            if (win instanceof java.awt.Frame) {
+                if ((((java.awt.Frame) win).getExtendedState() & java.awt.Frame.MAXIMIZED_BOTH) == 0) {
+                    win.pack();
+                }
+            } else {
+                win.pack();
             }
-        } else if (top instanceof java.awt.Window) {
-            ((java.awt.Window) top).pack();
         }
         SwingUtilities.invokeLater(() -> resizeGuard = false);
     }
@@ -1873,7 +1938,11 @@ public class TerminalPanel extends JPanel implements java.awt.print.Printable {
 
     @Override
     public Dimension getPreferredSize() {
-        if (client != null) {
+        if (targetModelRows != null && targetModelCols != null) {
+            return new Dimension(targetModelCols * cellWidth + padding * 2,
+                    targetModelRows * cellHeight + padding * 2);
+        }
+        if (client != null && client.getScreenBuffer() != null) {
             ScreenBuffer sb = client.getScreenBuffer();
             int displayCols = sb.getDisplayCols();
             int displayRows = sb.getDisplayRows();