1 files changed, 42 insertions, 4 deletions

diff --git a/src/org/unitConverter/converterGUI/UnitConverterGUI.java b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
index b8b8894..69f188b 100644
--- a/src/org/unitConverter/converterGUI/UnitConverterGUI.java
+++ b/src/org/unitConverter/converterGUI/UnitConverterGUI.java
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2018 Adrien Hopkins
+ * Copyright (C) 2018-2021 Adrien Hopkins
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU Affero General Public License as published by
@@ -41,6 +41,7 @@ import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.Set;
 import java.util.function.Predicate;
+import java.util.stream.Collectors;
 
 import javax.swing.BorderFactory;
 import javax.swing.BoxLayout;
@@ -59,6 +60,8 @@ import javax.swing.JSlider;
 import javax.swing.JTabbedPane;
 import javax.swing.JTextArea;
 import javax.swing.JTextField;
+import javax.swing.UIManager;
+import javax.swing.UnsupportedLookAndFeelException;
 import javax.swing.WindowConstants;
 import javax.swing.border.TitledBorder;
 
@@ -85,7 +88,7 @@ final class UnitConverterGUI {
 	 * A tab in the View.
 	 */
 	private enum Pane {
-		UNIT_CONVERTER, EXPRESSION_CONVERTER, UNIT_VIEWER, PREFIX_VIEWER,
+		UNIT_CONVERTER, EXPRESSION_CONVERTER, UNIT_VIEWER, PREFIX_VIEWER, ABOUT,
 		SETTINGS;
 	}
 	
@@ -766,9 +769,19 @@ final class UnitConverterGUI {
 			this.presenter = new Presenter(this);
 			this.frame = new JFrame("Unit Converter");
 			this.frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
-			this.masterPane = new JTabbedPane();
+			
+			// enable system look and feel
+			try {
+				UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
+			} catch (ClassNotFoundException | InstantiationException
+					| IllegalAccessException | UnsupportedLookAndFeelException e) {
+				// oh well, just use default theme
+				System.err.println("Failed to enable system look-and-feel.");
+				e.printStackTrace();
+			}
 			
 			// create the components
+			this.masterPane = new JTabbedPane();
 			this.unitNameList = new SearchBoxList(this.presenter.unitNameSet());
 			this.prefixNameList = new SearchBoxList(this.presenter.prefixNameSet(),
 					this.presenter.getPrefixNameComparator(), true);
@@ -803,6 +816,8 @@ final class UnitConverterGUI {
 			case 3:
 				return Pane.PREFIX_VIEWER;
 			case 4:
+				return Pane.ABOUT;
+			case 5:
 				return Pane.SETTINGS;
 			default:
 				throw new AssertionError("No selected pane, or invalid pane.");
@@ -1114,10 +1129,33 @@ final class UnitConverterGUI {
 					}
 				}
 				
+				{ // Info panel
+					final JPanel infoPanel = new JPanel();
+					this.masterPane.addTab("\uD83D\uDEC8", // info (i) character
+							new JScrollPane(infoPanel));
+					
+					final JTextArea infoTextArea = new JTextArea();
+					infoTextArea.setEditable(false);
+					infoTextArea.setOpaque(false);
+					infoPanel.add(infoTextArea);
+					
+					// get info text
+					final String infoText;
+					try {
+						final Path aboutFile = Path.of("src", "about.txt");
+						infoText = Files.readAllLines(aboutFile).stream()
+								.filter(s -> !s.trim().startsWith("#"))
+								.collect(Collectors.joining("\n"));
+					} catch (final IOException e) {
+						throw new AssertionError("I/O exception loading about.txt");
+					}
+					infoTextArea.setText(infoText);
+				}
+				
 				{ // Settings panel
 					final JPanel settingsPanel = new JPanel();
 					this.masterPane.addTab("\u2699", new JScrollPane(settingsPanel));
-					this.masterPane.setMnemonicAt(4, KeyEvent.VK_S);
+					this.masterPane.setMnemonicAt(5, KeyEvent.VK_S);
 					
 					settingsPanel.setLayout(
 							new BoxLayout(settingsPanel, BoxLayout.PAGE_AXIS));