[Ch16] Applying changes from updated Ch 15 version (68f7434f) · Commits · examples / Head First Java 3rd Edition

src/main/java/ch16/BeatBox.java

+33 −56

Changes for src/main/java/ch16/BeatBox.java: 33 added lines, 56 removed lines.
Original line number	Diff line number	Diff line
		@@ -2,11 +2,12 @@ package ch16;

		import javax.sound.midi.*;
		import javax.swing.*;
		import java.awt.BorderLayout;
		import java.awt.GridLayout;
		import java.awt.event.ActionEvent;
		import java.awt.event.ActionListener;
		import java.io.*;
		import java.awt.*;
		import java.awt.event.*;
		import java.io.FileInputStream;
		import java.io.FileOutputStream;
		import java.io.ObjectInputStream;
		import java.io.ObjectOutputStream;
		import java.util.ArrayList;

		import static javax.sound.midi.ShortMessage.*;
		@@ -30,29 +31,28 @@ public class BeatBox {
		}

		public void buildGUI() {
		JFrame theFrame = new JFrame("Cyber BeatBox");
		theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		JFrame frame = new JFrame("Cyber BeatBox");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		BorderLayout layout = new BorderLayout();
		JPanel background = new JPanel(layout);
		background.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));

		checkboxList = new ArrayList<>();
		Box buttonBox = new Box(BoxLayout.Y_AXIS);

		JButton start = new JButton("Start");
		start.addActionListener(new MyStartListener());
		start.addActionListener(e -> buildTrackAndStart());
		buttonBox.add(start);

		JButton stop = new JButton("Stop");
		stop.addActionListener(new MyStopListener());
		stop.addActionListener(e -> sequencer.stop());
		buttonBox.add(stop);

		JButton upTempo = new JButton("Tempo Up");
		upTempo.addActionListener(new MyUpTempoListener());
		upTempo.addActionListener(e -> changeTempo(1.03f));
		buttonBox.add(upTempo);

		JButton downTempo = new JButton("Tempo Down");
		downTempo.addActionListener(new MyDownTempoListener());
		downTempo.addActionListener(e -> changeTempo(0.97f));
		buttonBox.add(downTempo);

		JButton save = new JButton("serializeIt");
		@@ -73,7 +73,7 @@ public class BeatBox {
		background.add(BorderLayout.EAST, buttonBox);
		background.add(BorderLayout.WEST, nameBox);

		theFrame.getContentPane().add(background);
		frame.getContentPane().add(background);

		GridLayout grid = new GridLayout(16, 16);
		grid.setVgap(1);
		@@ -82,6 +82,7 @@ public class BeatBox {
		JPanel mainPanel = new JPanel(grid);
		background.add(BorderLayout.CENTER, mainPanel);

		checkboxList = new ArrayList<>();
		for (int i = 0; i < 256; i++) {
		JCheckBox c = new JCheckBox();
		c.setSelected(false);
		@@ -91,13 +92,12 @@ public class BeatBox {

		setUpMidi();

		theFrame.setBounds(50, 50, 300, 300);
		theFrame.pack();
		theFrame.setVisible(true);
		frame.setBounds(50, 50, 300, 300);
		frame.pack();
		frame.setVisible(true);
		}


		public void setUpMidi() {
		private void setUpMidi() {
		try {
		sequencer = MidiSystem.getSequencer();
		sequencer.open();
		@@ -108,9 +108,9 @@ public class BeatBox {
		} catch (Exception e) {
		e.printStackTrace();
		}
		} // close method
		}

		public void buildTrackAndStart() {
		private void buildTrackAndStart() {
		int[] trackList;

		sequence.deleteTrack(track);
		@@ -131,45 +131,24 @@ public class BeatBox {
		track.add(makeEvent(CONTROL_CHANGE, 1, 127, 0, 16));
		}

		track.add(makeEvent(192, 9, 1, 0, 15));
		track.add(makeEvent(PROGRAM_CHANGE, 9, 1, 0, 15));
		try {

		sequencer.setSequence(sequence);
		sequencer.setLoopCount(sequencer.LOOP_CONTINUOUSLY);
		sequencer.start();
		sequencer.setTempoInBPM(120);
		sequencer.start();
		} catch (Exception e) {
		e.printStackTrace();
		}
		}

		public class MyStartListener implements ActionListener {
		public void actionPerformed(ActionEvent a) {
		buildTrackAndStart();
		}
		}

		public class MyStopListener implements ActionListener {
		public void actionPerformed(ActionEvent a) {
		sequencer.stop();
		}
		}

		public class MyUpTempoListener implements ActionListener {
		public void actionPerformed(ActionEvent a) {
		float tempoFactor = sequencer.getTempoFactor();
		sequencer.setTempoFactor((float) (tempoFactor * 1.03));
		}
		}

		public class MyDownTempoListener implements ActionListener {
		public void actionPerformed(ActionEvent a) {
		private void changeTempo(float tempoMultiplier) {
		float tempoFactor = sequencer.getTempoFactor();
		sequencer.setTempoFactor((float) (tempoFactor * .97));
		}
		sequencer.setTempoFactor(tempoFactor * tempoMultiplier);
		}

		public void makeTracks(int[] list) {
		private void makeTracks(int[] list) {
		for (int i = 0; i < 16; i++) {
		int key = list[i];

		@@ -180,13 +159,12 @@ public class BeatBox {
		}
		}

		public MidiEvent makeEvent(int comd, int chan, int one, int two, int tick) {
		public static MidiEvent makeEvent(int cmd, int chnl, int one, int two, int tick) {
		MidiEvent event = null;
		try {
		ShortMessage a = new ShortMessage();
		a.setMessage(comd, chan, one, two);
		event = new MidiEvent(a, tick);

		ShortMessage msg = new ShortMessage();
		msg.setMessage(cmd, chnl, one, two);
		event = new MidiEvent(msg, tick);
		} catch (Exception e) {
		e.printStackTrace();
		}
		@@ -211,9 +189,8 @@ public class BeatBox {
		} catch (Exception ex) {
		ex.printStackTrace();
		}

		} // close method
		} // close inner class
		}
		}

		public class MyReadInListener implements ActionListener {

		@@ -240,8 +217,8 @@ public class BeatBox {
		sequencer.stop();
		buildTrackAndStart();

		} // close method
		} // close inner class
		}
		}


		}