Checkpoint of my Swing UI refactoring. Usable for output-only programs, but only barely.

src/main/java/com/loomcom/symon/ui/PreferencesDialog.java

@@ -0,0 +1,124 @@
+package com.loomcom.symon.ui;
+
+import com.loomcom.symon.Preferences;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.Observable;
+
+public class PreferencesDialog extends Observable implements Preferences {
+
+    private final JDialog dialog;
+
+    private JTextField aciaAddressField;
+    private JTextField programLoadAddressField;
+
+    private int programLoadAddress = DEFAULT_PROGRAM_LOAD_ADDRESS;
+    private int aciaAddress = DEFAULT_ACIA_ADDRESS;
+
+    public PreferencesDialog(Frame parent, boolean modal) {
+        this.dialog = new JDialog(parent, modal);
+        initComponents();
+        updateUi();
+    }
+
+    public JDialog getDialog() {
+        return dialog;
+    }
+
+    private void initComponents() {
+        dialog.setTitle("Preferences");
+        Container contents = dialog.getContentPane();
+
+        JPanel settingsContainer = new JPanel();
+        JPanel buttonsContainer = new JPanel();
+
+        GridBagLayout layout = new GridBagLayout();
+        settingsContainer.setLayout(layout);
+
+        final JLabel aciaAddressLabel = new JLabel("ACIA Address");
+        final JLabel programLoadAddressLabel = new JLabel("Program Load Address");
+
+        aciaAddressField = new JTextField(8);
+        programLoadAddressField = new JTextField(8);
+
+        aciaAddressLabel.setLabelFor(aciaAddressField);
+        programLoadAddressLabel.setLabelFor(programLoadAddressField);
+
+        GridBagConstraints constraints = new GridBagConstraints();
+
+        constraints.insets = new Insets(5, 5, 5, 5);
+        constraints.fill = GridBagConstraints.HORIZONTAL;
+        constraints.gridx = 0;
+        constraints.gridy = 0;
+
+        settingsContainer.add(aciaAddressLabel, constraints);
+
+        constraints.gridx = 1;
+        settingsContainer.add(aciaAddressField, constraints);
+
+        constraints.gridy = 1;
+        constraints.gridx = 0;
+        settingsContainer.add(programLoadAddressLabel, constraints);
+
+        constraints.gridx = 1;
+        settingsContainer.add(programLoadAddressField, constraints);
+
+        JButton applyButton = new JButton("Apply");
+        JButton cancelButton = new JButton("Cancel");
+
+
+        cancelButton.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent actionEvent) {
+                updateUi();
+                dialog.setVisible(false);
+            }
+        });
+
+        applyButton.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent actionEvent) {
+                programLoadAddress = hexToInt(programLoadAddressField.getText());
+                aciaAddress = hexToInt(aciaAddressField.getText());
+                updateUi();
+                notifyObservers();
+                dialog.setVisible(false);
+            }
+        });
+
+        buttonsContainer.add(applyButton);
+        buttonsContainer.add(cancelButton);
+
+        contents.add(settingsContainer, BorderLayout.PAGE_START);
+        contents.add(buttonsContainer, BorderLayout.PAGE_END);
+
+        dialog.pack();
+    }
+
+    private String intToHex(int i) {
+        return String.format("%04x", i);
+    }
+
+    private int hexToInt(String s) {
+        try {
+            return Integer.parseInt(s, 16);
+        } catch (NumberFormatException ex) {
+            // TODO: Handle Displaying error.
+            return 0;
+        }
+    }
+
+    public int getProgramStartAddress() {
+        return programLoadAddress;
+    }
+
+    public int getAciaAddress() {
+        return aciaAddress;
+    }
+
+    public void updateUi() {
+        aciaAddressField.setText(intToHex(aciaAddress));
+        programLoadAddressField.setText(intToHex(programLoadAddress));
+    }
+}