Now using glyphicons for media controls.

src/main/java/musicplayer/LibraryConfigGUI.java

@@ -17,6 +17,7 @@ class LibraryConfigGUI {
         frame.setContentPane(createUI());
         frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
         frame.setSize(300, 200);
+        frame.setMinimumSize(new Dimension(300, 200));
         frame.setVisible(true);
         updateLibraryListContents();
     }

src/main/java/musicplayer/PlayerGUI.java

@@ -12,10 +12,12 @@ import musicplayer.model.Artist;
 import musicplayer.model.HasSongs;
 import musicplayer.model.Song;
 import musicplayer.swingmodels.PlaylistTableModel;
+import musicplayer.util.Icons;
 import musicplayer.util.LibraryUtils;
 import musicplayer.util.PlaylistUtils;
 
 import javax.swing.*;
+import javax.swing.event.HyperlinkEvent;
 import javax.swing.filechooser.FileNameExtensionFilter;
 import javax.swing.tree.DefaultMutableTreeNode;
 import javax.swing.tree.DefaultTreeModel;
@@ -27,7 +29,10 @@ import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.io.File;
 import java.io.IOException;
+import java.net.URISyntaxException;
+import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.*;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -77,6 +82,7 @@ public class PlayerGUI implements PlayerCallbackInterface, LibraryCallbackInterf
         DatabaseManager.init();
         PlayerGUI playerGUI = new PlayerGUI();
         JFrame frame = new JFrame();
+        frame.setMinimumSize(new Dimension(600, 400));
         frame.setContentPane(playerGUI.mainPanel);
         frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
         frame.pack();
@@ -362,9 +368,10 @@ public class PlayerGUI implements PlayerCallbackInterface, LibraryCallbackInterf
     private JToolBar createControlButtons() {
         JToolBar toolBar = new JToolBar();
         toolBar.setFloatable(false);
-        JButton playButton = new JButton("Play");
+        JPanel controlBar = new JPanel(new GridLayout(1, 5));
+        JButton playButton = new JButton();
+        playButton.setIcon(Icons.playIcon);
         playButton.setMnemonic('P');
-        playButton.setDisplayedMnemonicIndex(0);
         playButton.addActionListener(e -> {
             if (playList.getRowCount() > 0) {
                 if (playList.getSelectedRowCount() > 0)
@@ -373,28 +380,31 @@ public class PlayerGUI implements PlayerCallbackInterface, LibraryCallbackInterf
                     playSong(playlistTableModel.getFirst());
             }
         });
-        toolBar.add(playButton);
+        controlBar.add(playButton);
-        JButton pauseButton = new JButton("Pause");
+        JButton pauseButton = new JButton();
+        pauseButton.setIcon(Icons.pauseIcon);
         pauseButton.setMnemonic('E');
         pauseButton.addActionListener(e -> {
             player.pause();
             setSongHighlighting(player.getCurrentSong()); // Resume won't function if a different song is selected.
         });
-        toolBar.add(pauseButton);
+        controlBar.add(pauseButton);
-        JButton stopButton = new JButton("Stop");
+        JButton stopButton = new JButton();
+        stopButton.setIcon(Icons.stopIcon);
         stopButton.setMnemonic('S');
-        stopButton.setDisplayedMnemonicIndex(0);
         stopButton.addActionListener(e -> player.stop());
-        toolBar.add(stopButton);
+        controlBar.add(stopButton);
-        JButton previousButton = new JButton("Previous");
+        JButton previousButton = new JButton();
+        previousButton.setIcon(Icons.prevIcon);
         previousButton.setMnemonic('R');
         previousButton.addActionListener(e -> playPreviousSong());
-        toolBar.add(previousButton);
+        controlBar.add(previousButton);
-        JButton nextButton = new JButton("Next");
+        JButton nextButton = new JButton();
+        nextButton.setIcon(Icons.nextIcon);
         nextButton.setMnemonic('N');
-        nextButton.setDisplayedMnemonicIndex(0);
         nextButton.addActionListener(e -> playNextSong());
-        toolBar.add(nextButton);
+        controlBar.add(nextButton);
+        toolBar.add(controlBar);
         toolBar.add(createVolumeControls());
         return toolBar;
     }
@@ -489,6 +499,32 @@ public class PlayerGUI implements PlayerCallbackInterface, LibraryCallbackInterf
 
         // Add everything to the menu bar itself
         menuBar.add(playlistTools);
+
+        JMenu helpMenu = new JMenu("Help");
+        menuItem = new JMenuItem("About");
+        menuItem.addActionListener(e -> {
+            try {
+                //noinspection ConstantConditions
+                JEditorPane messagePane = new JEditorPane("text/html", Files.readAllLines(
+                        Paths.get(PlayerGUI.class.getClassLoader().getResource("LICENSE.txt").toURI())).get(0));
+                messagePane.setEditable(false);
+                messagePane.addHyperlinkListener(hl -> {
+                    if (hl.getEventType() == HyperlinkEvent.EventType.ACTIVATED)
+                        if(Desktop.isDesktopSupported())
+                            try {
+                                Desktop.getDesktop().browse(hl.getURL().toURI());
+                            } catch (IOException | URISyntaxException e1) {
+                                e1.printStackTrace();
+                            }
+                });
+                JOptionPane.showMessageDialog(mainPanel, messagePane, "About", JOptionPane.INFORMATION_MESSAGE);
+            } catch (IOException | URISyntaxException e1) {
+                e1.printStackTrace();
+            }
+        });
+        helpMenu.add(menuItem);
+
+        menuBar.add(helpMenu);
         return menuBar;
     }
 

src/main/java/musicplayer/util/Icons.java

@@ -0,0 +1,14 @@
+package musicplayer.util;
+
+import javax.swing.*;
+
+@SuppressWarnings("ConstantConditions")
+public final class Icons {
+
+    private static final ClassLoader classLoader = Icons.class.getClassLoader();
+    public static final Icon playIcon = new ImageIcon(classLoader.getResource("glyphicons-174-play.png"));
+    public static final Icon pauseIcon = new ImageIcon(classLoader.getResource("glyphicons-175-pause.png"));
+    public static final Icon stopIcon = new ImageIcon(classLoader.getResource("glyphicons-176-stop.png"));
+    public static final Icon prevIcon = new ImageIcon(classLoader.getResource("glyphicons-171-step-backward.png"));
+    public static final Icon nextIcon = new ImageIcon(classLoader.getResource("glyphicons-179-step-forward.png"));
+}

src/main/resources/LICENSE.txt

@@ -0,0 +1,2 @@
+<html><a href="http://glyphicons.com/">GLYPHICONS FREE by Jan Kovarik</a> is licensed under <a href="http://creativecommons.org/licenses/by/3.0/">CC BY 3.0</a>.
+</html>