Refactored construction of Swing player controls to their own class.

pom.xml

@@ -32,7 +32,7 @@
                         <manifest>
                             <addClasspath>true</addClasspath>
                             <classpathPrefix>lib/</classpathPrefix>
-                            <mainClass>musicplayer.PlayerGUI</mainClass>
+                            <mainClass>musicplayer.Main</mainClass>
                         </manifest>
                     </archive>
                 </configuration>

src/main/java/musicplayer/Main.java

@@ -0,0 +1,29 @@
+package musicplayer;
+
+import com.google.inject.Guice;
+import com.google.inject.Injector;
+import musicplayer.swingui.PlayerGUI;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class Main {
+
+    public static void main(String[] args) {
+        runSwingUIMode();
+    }
+
+    /**
+     * Start the application with injection bindings contained in SwingUIModule
+     */
+    private static void runSwingUIMode() {
+        Injector injector = Guice.createInjector(new SwingUIModule());
+        PlayerGUI playerGUI = injector.getInstance(PlayerGUI.class);
+        JFrame frame = new JFrame();
+        frame.setMinimumSize(new Dimension(600, 400));
+        frame.setContentPane(playerGUI);
+        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
+        frame.pack();
+        frame.setVisible(true);
+    }
+}

src/main/java/musicplayer/SwingUIModule.java

@@ -2,6 +2,7 @@ package musicplayer;
 
 import com.google.inject.AbstractModule;
 import com.google.inject.Singleton;
+import musicplayer.callbacks.PlayerCallbackInterface;
 import musicplayer.db.HibernateDatabase;
 import musicplayer.db.IDatabase;
 import musicplayer.library.ILibrary;
@@ -10,6 +11,7 @@ import musicplayer.player.GStreamerPlayer;
 import musicplayer.player.IPlayer;
 import musicplayer.playlist.IPlaylist;
 import musicplayer.playlist.JTablePlaylist;
+import musicplayer.swingui.PlayerGUI;
 
 class SwingUIModule extends AbstractModule {
 
@@ -19,5 +21,6 @@ class SwingUIModule extends AbstractModule {
         bind(IDatabase.class).to(HibernateDatabase.class).in(Singleton.class);
         bind(IPlaylist.class).to(JTablePlaylist.class).in(Singleton.class);
         bind(ILibrary.class).to(JTreeLibrary.class).in(Singleton.class);
+        bind(PlayerCallbackInterface.class).to(PlayerGUI.class);
     }
 }

src/main/java/musicplayer/callbacks/PlayerCallbackInterface.java

@@ -1,9 +1,5 @@
 package musicplayer.callbacks;
 
-import com.google.inject.ImplementedBy;
-import musicplayer.PlayerGUI;
-
-@ImplementedBy(PlayerGUI.class)
 public interface PlayerCallbackInterface {
 
     /**

src/main/java/musicplayer/swingui/ControlBar.java

@@ -0,0 +1,119 @@
+package musicplayer.swingui;
+
+import musicplayer.StartPlayingException;
+import musicplayer.player.IPlayer;
+import musicplayer.util.Icons;
+
+import javax.swing.*;
+import java.awt.*;
+
+public class ControlBar extends JPanel {
+    IPlayer player;
+
+    public ControlBar(IPlayer player){
+        this.player = player;
+        setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
+        add(playButton());
+        add(pauseButton());
+        add(stopButton());
+        add(previousButton());
+        add(nextButton());
+        add(repeatButton());
+    }
+
+    private JButton playButton(){
+        JButton playButton = new ControlButton(Icons.playIcon);
+        playButton.setName("playButton");
+        playButton.setMnemonic('P');
+        playButton.addActionListener(e -> {
+            try {
+                player.play();
+            } catch (StartPlayingException e1) {
+                showError(e1);
+            }
+        });
+        return playButton;
+    }
+
+    private JButton pauseButton(){
+        JButton pauseButton = new ControlButton(Icons.pauseIcon);
+        pauseButton.setMnemonic('E');
+        pauseButton.addActionListener(e -> player.pause());
+        return pauseButton;
+    }
+
+    private JButton stopButton(){
+        JButton stopButton = new ControlButton(Icons.stopIcon);
+        stopButton.setMnemonic('S');
+        stopButton.addActionListener(e -> player.stop());
+        return stopButton;
+    }
+
+    private JButton previousButton(){
+        JButton previousButton = new ControlButton(Icons.prevIcon);
+        previousButton.setMnemonic('R');
+        previousButton.addActionListener(e -> {
+            try {
+                player.previous();
+            } catch (StartPlayingException e1) {
+                showError(e1);
+            }
+        });
+        return previousButton;
+    }
+
+    private JButton nextButton(){
+        JButton nextButton = new ControlButton(Icons.nextIcon);
+        nextButton.setMnemonic('N');
+        nextButton.addActionListener(e -> {
+            try {
+                player.next();
+            } catch (StartPlayingException e1) {
+                showError(e1);
+            }
+        });
+        return nextButton;
+    }
+
+    private JButton repeatButton(){
+        JButton repeatButton = new ControlButton(Icons.repeatMultiIcon);
+        repeatButton.setToolTipText("Repeating playlist.");
+        repeatButton.addActionListener(e -> {
+            player.setRepeat(!player.isRepeating());
+            if(player.isRepeating()) {
+                repeatButton.setIcon(Icons.repeatSingleIcon);
+                repeatButton.setToolTipText("Repeating song.");
+            }
+            else {
+                repeatButton.setIcon(Icons.repeatMultiIcon);
+                repeatButton.setToolTipText("Repeating playlist.");
+            }
+        });
+        return repeatButton;
+    }
+
+
+    private void showError(StartPlayingException ex) {
+        JOptionPane.showMessageDialog(this, "Failed to play " + ex.getSong().toString() + ".\n" +
+                "If file path contains non-ASCII characters, please restart the application with UTF-8 encoding.");
+    }
+
+    /**
+     * Button for performing some control action on the player
+     */
+    private class ControlButton extends JButton {
+        public ControlButton(Icon icon){
+            setIcon(icon);
+        }
+
+        final Dimension buttonSize = new Dimension(40, 40);
+        @Override
+        public Dimension getPreferredSize() {
+            return buttonSize;
+        }
+        @Override
+        public Dimension getMaximumSize() {
+            return buttonSize;
+        }
+    }
+}

src/main/java/musicplayer/swingui/LibraryConfigGUI.java

@@ -1,4 +1,4 @@
-package musicplayer;
+package musicplayer.swingui;
 
 import musicplayer.util.ConfigManager;
 

src/main/java/musicplayer/swingui/PlayerGUI.java

@@ -1,14 +1,12 @@
-package musicplayer;
+package musicplayer.swingui;
 
-import com.google.inject.Guice;
 import com.google.inject.Inject;
-import com.google.inject.Injector;
+import musicplayer.StartPlayingException;
 import musicplayer.callbacks.PlayerCallbackInterface;
 import musicplayer.library.ILibrary;
 import musicplayer.player.IPlayer;
 import musicplayer.playlist.IPlaylist;
 import musicplayer.util.ConfigManager;
-import musicplayer.util.Icons;
 import org.jnativehook.GlobalScreen;
 import org.jnativehook.NativeHookException;
 import org.jnativehook.keyboard.NativeKeyEvent;
@@ -69,17 +67,6 @@ public class PlayerGUI extends JPanel implements PlayerCallbackInterface {
         library.refreshLibrary();
     }
 
-    public static void main(String[] args) {
-        Injector injector = Guice.createInjector(new SwingUIModule());
-        PlayerGUI playerGUI = injector.getInstance(PlayerGUI.class);
-        JFrame frame = new JFrame();
-        frame.setMinimumSize(new Dimension(600, 400));
-        frame.setContentPane(playerGUI);
-        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
-        frame.pack();
-        frame.setVisible(true);
-    }
-
     /**
      * Set the value of seekBar.
      *
@@ -144,52 +131,7 @@ public class PlayerGUI extends JPanel implements PlayerCallbackInterface {
     private JToolBar createControlButtons() {
         JToolBar toolBar = new JToolBar();
         toolBar.setFloatable(false);
-        JPanel controlBar = new JPanel(new GridLayout(1, 5));
-        JButton playButton = new JButton();
-        playButton.setName("playButton");
-        playButton.setIcon(Icons.playIcon);
-        playButton.setMnemonic('P');
-        playButton.addActionListener(e -> {
-            try {
-                player.play();
-            } catch (StartPlayingException e1) {
-                showError(e1);
-            }
-        });
-        controlBar.add(playButton);
-        JButton pauseButton = new JButton();
-        pauseButton.setIcon(Icons.pauseIcon);
-        pauseButton.setMnemonic('E');
-        pauseButton.addActionListener(e -> player.pause());
-        controlBar.add(pauseButton);
-        JButton stopButton = new JButton();
-        stopButton.setIcon(Icons.stopIcon);
-        stopButton.setMnemonic('S');
-        stopButton.addActionListener(e -> player.stop());
-        controlBar.add(stopButton);
-        JButton previousButton = new JButton();
-        previousButton.setIcon(Icons.prevIcon);
-        previousButton.setMnemonic('R');
-        previousButton.addActionListener(e -> {
-            try {
-                player.previous();
-            } catch (StartPlayingException e1) {
-                showError(e1);
-            }
-        });
-        controlBar.add(previousButton);
-        JButton nextButton = new JButton();
-        nextButton.setIcon(Icons.nextIcon);
-        nextButton.setMnemonic('N');
-        nextButton.addActionListener(e -> {
-            try {
-                player.next();
-            } catch (StartPlayingException e1) {
-                showError(e1);
-            }
-        });
-        controlBar.add(nextButton);
-        toolBar.add(controlBar);
+        toolBar.add(new ControlBar(player));
         toolBar.add(createVolumeControls());
         return toolBar;
     }
@@ -319,10 +261,14 @@ public class PlayerGUI extends JPanel implements PlayerCallbackInterface {
      */
     private class SeekbarMouseListener implements MouseListener {
         @Override
-        public void mouseClicked(MouseEvent e) { seeking.set(true); }
+        public void mouseClicked(MouseEvent e) {
+            seeking.set(true);
+        }
 
         @Override
-        public void mousePressed(MouseEvent e) { seeking.set(true); }
+        public void mousePressed(MouseEvent e) {
+            seeking.set(true);
+        }
 
         @Override
         public void mouseReleased(MouseEvent e) {
@@ -331,10 +277,12 @@ public class PlayerGUI extends JPanel implements PlayerCallbackInterface {
         }
 
         @Override
-        public void mouseEntered(MouseEvent e) {}
+        public void mouseEntered(MouseEvent e) {
+        }
 
         @Override
-        public void mouseExited(MouseEvent e) {}
+        public void mouseExited(MouseEvent e) {
+        }
     }
 
     private class GlobalKeyboardShortcuts implements NativeKeyListener {

src/main/java/musicplayer/util/ConfigManager.java

@@ -42,11 +42,7 @@ public final class ConfigManager {
      */
     public static void saveLibraryDirectories(List<File> folderList){
         librarySettings.setProperty(foldersKey, folderList.stream().map(File::toString).collect(Collectors.joining(",")));
-        try(FileWriter fileWriter = new FileWriter(settingsFilename)){
-            librarySettings.store(fileWriter, "");
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
+        writeSettings();
     }
 
     /**
@@ -61,11 +57,7 @@ public final class ConfigManager {
         } catch (IOException ignored) {
         }
         librarySettings.setProperty(databaseKey, "musicDB");
-        try(FileWriter fileWriter = new FileWriter(settingsFilename)){
-            librarySettings.store(fileWriter, "");
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
+        writeSettings();
         return "jdbc:hsqldb:file:" + new File("musicDB").getAbsolutePath() + ";shutdown=true"; //Use relative file by default
     }
 
@@ -89,11 +81,7 @@ public final class ConfigManager {
      */
     public static void setLastDisplayTypeIndex(Integer index){
         librarySettings.setProperty(libraryDisplayKey, index.toString());
-        try(FileWriter fileWriter = new FileWriter(settingsFilename)){
-            librarySettings.store(fileWriter, "");
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
+        writeSettings();
     }
 
     public static int getLastVolume(){
@@ -109,6 +97,10 @@ public final class ConfigManager {
 
     public static void setLastVolume(Integer index){
         librarySettings.setProperty(lastVolumeKey, index.toString());
+        writeSettings();
+    }
+
+    private static void writeSettings(){
         try(FileWriter fileWriter = new FileWriter(settingsFilename)){
             librarySettings.store(fileWriter, "");
         } catch (IOException e) {

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

@@ -11,4 +11,6 @@ public final class Icons {
     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"));
+    public static final Icon repeatSingleIcon = new ImageIcon(classLoader.getResource("glyphicons-86-repeat.png"));
+    public static final Icon repeatMultiIcon = new ImageIcon(classLoader.getResource("glyphicons-83-roundabout.png"));
 }