Midi player to play tones

important

Author: Pablo Fernandez

src/scaleplayer/ScalePlayer.java

@@ -28,10 +28,12 @@
 public class ScalePlayer extends Application {
 
     private static int startingNote;
-    
+    private MidiPlayer sequence = new MidiPlayer(2, 60);
+
     @Override
     public void start(Stage primaryStage) {
 
+        //create menu bar
         MenuBar menuBar = new MenuBar();
         menuBar.prefWidthProperty().bind(primaryStage.widthProperty());
         Menu file = new Menu("File");
@@ -40,6 +42,7 @@ public void start(Stage primaryStage) {
         file.getItems().add(exitMenuItem);
         exitMenuItem.setOnAction(actionEvent -> Platform.exit());
 
+        //play button
         Button playBtn = new Button();
         playBtn.setText("Play Scale");
         playBtn.setStyle("-fx-base: #b6e7c9;");
@@ -51,34 +54,40 @@ public void handle(ActionEvent event) {
                 dialog.setTitle("Starting Note");
                 dialog.setHeaderText("Please enter a note (0-155)");
 
+                //get result, parse it into an int in a roundabout way, then play scale once its had
                 Optional<String> result = dialog.showAndWait();
                 if (result.isPresent()){
-                    System.out.println("Entered Note: " + result.toString());
                     String stringResult = result.toString();
                     stringResult = stringResult.substring(9, stringResult.length()-1);
                     startingNote = Integer.parseInt(stringResult); 
-                    //playScale(startingNote);
+                    stopScale(sequence);
+                    clearScale(sequence);
+                    playScale(sequence, startingNote);
                 }
             }
         });
 
+        //stop button
         Button stopBtn = new Button();
         stopBtn.setText("Stop Playing");
         stopBtn.setStyle("-fx-base: #eda6a6;");
         stopBtn.setOnAction(new EventHandler<ActionEvent>() {
 
             @Override
             public void handle(ActionEvent event) {
-                System.out.println("Hello World!");
+                stopScale(sequence);
+                clearScale(sequence);
             }
         });
 
+        //create layout
         HBox hbox = new HBox();
         hbox.getChildren().addAll(playBtn, stopBtn);
         hbox.setSpacing(10);
         hbox.setCenterShape(true);
         hbox.setAlignment(Pos.CENTER);
 
+        //Overhead for showing screen
         BorderPane root = new BorderPane();
 
         root.setTop(menuBar);
@@ -91,9 +100,15 @@ public void handle(ActionEvent event) {
         primaryStage.show();
     }
 
-    public void playScale(int startingNote) {
-            
-        MidiPlayer sequence = new MidiPlayer(2, 60);
+    public void stopScale(MidiPlayer sequence) {
+        sequence.stop();
+    }
+    
+    public void clearScale(MidiPlayer sequence) {
+        sequence.clear();
+    }
+        
+    public void playScale(MidiPlayer sequence, int startingNote) {
      /**
      * 
      * A convenience method for adding notes to the composition.
@@ -109,40 +124,22 @@ public void playScale(int startingNote) {
      * pitch, volume, startTick, duration,
                         channel, trackIndex
      */
-        sequence.addNote(50, 100, 1, 1,
-                        1, 1);
-        sequence.addNote(51, 100, 2, 1,
-                        1, 1);
-        sequence.addNote(52, 100, 3, 1,
-                        1, 1);
-        sequence.addNote(53, 100, 4, 1,
-                        1, 1);
-        sequence.addNote(54, 100, 5, 1,
+     
+        for(int i=1; i<9; i++)
+        {
+            sequence.addNote(startingNote, 100, i, 1,
                         1, 1);
-        sequence.addNote(55, 100, 6, 1,
-                        1, 1);
-        sequence.addNote(56, 100, 7, 1,
-                        1, 1);        
-        sequence.addNote(57, 100, 8, 1,
-                        1, 1);
-        
-        sequence.addNote(57, 100, 10, 1,
-                        1, 1);
-        sequence.addNote(56, 100, 11, 1,
-                        1, 1);
-        sequence.addNote(55, 100, 12, 1,
-                        1, 1);
-        sequence.addNote(54, 100, 13, 1,
-                        1, 1);
-        sequence.addNote(53, 100, 14, 1,
-                        1, 1);
-        sequence.addNote(52, 100, 15, 1,
-                        1, 1);
-        sequence.addNote(51, 100, 16, 1,
-                        1, 1);        
-        sequence.addNote(50, 100, 17, 1,
+            startingNote = startingNote + 1;
+        }
+
+        startingNote = startingNote - 1;
+        for(int i=10; i<18; i++)
+        {
+            sequence.addNote(startingNote, 100, i, 1,
                         1, 1);
-        sequence.play();
+            startingNote = startingNote - 1;
+        }
+            sequence.play();
     }
 
     /**