[App A] Using the map of the instruments and their checkboxes as the model of... (121c950b) · Commits · examples / Head First Java 3rd Edition

src/main/java/appA/BeatBoxFinal.java

+33 −30

Changes for src/main/java/appA/BeatBoxFinal.java: 33 added lines, 30 removed lines.
Original line number	Diff line number	Diff line
		@@ -17,10 +17,10 @@ import java.util.*;
		public class BeatBoxFinal {
		public static final int NUMBER_OF_BEATS = 16;
		private final List<BeatInstrument> instruments;
		private final Map<BeatInstrument, List<JCheckBox>> instrumentCheckboxes = new HashMap<>();

		private JList<String> messages;
		private JTextField userMessage;
		private ArrayList<JCheckBox> checkboxList;
		private int nextNum;
		private final Vector<String> incomingMessages = new Vector<>();
		private String userName;
		@@ -78,8 +78,6 @@ public class BeatBoxFinal {
		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());
		@@ -112,28 +110,29 @@ public class BeatBoxFinal {
		messages.setListData(incomingMessages); // no data to start with

		Box nameBox = new Box(BoxLayout.Y_AXIS);
		GridLayout grid = new GridLayout(instruments.size(), NUMBER_OF_BEATS, 2, 1);
		JPanel mainPanel = new JPanel(grid);

		for (BeatInstrument instrument : instruments) {
		JLabel instrumentName = new JLabel(instrument.getInstrumentName());
		instrumentName.setBorder(BorderFactory.createEmptyBorder(4, 1, 4, 1));
		nameBox.add(instrumentName);
		}

		background.add(BorderLayout.EAST, buttonBox);
		background.add(BorderLayout.WEST, nameBox);

		theFrame.getContentPane().add(background);
		int numberOfInstruments = instruments.size();
		GridLayout grid = new GridLayout(numberOfInstruments, NUMBER_OF_BEATS, 2, 1);
		JPanel mainPanel = new JPanel(grid);
		background.add(BorderLayout.CENTER, mainPanel);

		for (int i = 0; i < (numberOfInstruments * NUMBER_OF_BEATS); i++) {
		List<JCheckBox> checkboxList = new ArrayList<>();
		for (int i = 0; i < NUMBER_OF_BEATS; i++) {
		JCheckBox c = new JCheckBox();
		c.setSelected(false);
		checkboxList.add(c);
		mainPanel.add(c);
		}
		instrumentCheckboxes.put(instrument, checkboxList);
		}

		background.add(BorderLayout.EAST, buttonBox);
		background.add(BorderLayout.WEST, nameBox);
		background.add(BorderLayout.CENTER, mainPanel);

		theFrame.getContentPane().add(background);
		theFrame.setBounds(50, 50, 300, 300);
		theFrame.pack();
		theFrame.setVisible(true);
		@@ -156,17 +155,17 @@ public class BeatBoxFinal {
		sequence.deleteTrack(track);
		track = sequence.createTrack();

		int numberOfInstruments = instruments.size();
		for (int i = 0; i < numberOfInstruments; i++) {
		for (BeatInstrument instrument : instruments) {
		beatsForInstrument = new ArrayList<>();

		for (int j = 0; j < NUMBER_OF_BEATS; j++) {
		JCheckBox jc = checkboxList.get(j + (NUMBER_OF_BEATS * i));
		if (jc.isSelected()) {
		beatsForInstrument.add(j);
		List<JCheckBox> checkboxes = instrumentCheckboxes.get(instrument);
		for (int i = 0; i < checkboxes.size(); i++) {
		JCheckBox checkbox = checkboxes.get(i);
		if (checkbox.isSelected()) {
		beatsForInstrument.add(i);
		}
		}
		makeTracks(instruments.get(i), beatsForInstrument);
		makeTracks(instrument, beatsForInstrument);
		}
		track.add(makeEvent(ShortMessage.PROGRAM_CHANGE, 9, 1, 0, 15)); // - so we always go to full 16 beats
		try {
		@@ -207,12 +206,13 @@ public class BeatBoxFinal {

		public class MySendListener implements ActionListener {
		public void actionPerformed(ActionEvent a) {
		// make an arraylist of just the STATE of the checkboxes
		// make an array of just the STATE of the checkboxes
		boolean[] checkboxState = new boolean[256];
		for (int i = 0; i < 256; i++) {
		JCheckBox check = checkboxList.get(i);
		if (check.isSelected()) {
		checkboxState[i] = true;

		int i = 0;
		for (List<JCheckBox> instrumentCheckboxes : instrumentCheckboxes.values()) {
		for (JCheckBox instrumentCheckbox : instrumentCheckboxes) {
		checkboxState[i++] = instrumentCheckbox.isSelected();
		}
		}
		try {
		@@ -220,6 +220,7 @@ public class BeatBoxFinal {
		out.writeObject(checkboxState);
		} catch (IOException ex) {
		System.out.println("Sorry dude. Could not send it to the server.");
		ex.printStackTrace();
		}
		userMessage.setText("");
		}
		@@ -261,10 +262,12 @@ public class BeatBoxFinal {
		}
		}

		public void changeSequence(boolean[] checkboxState) {
		for (int i = 0; i < instruments.size() * NUMBER_OF_BEATS; i++) {
		JCheckBox check = checkboxList.get(i);
		check.setSelected(checkboxState[i]);
		public void changeSequence(boolean[] newCheckboxStates) {
		int i = 0;
		for (List<JCheckBox> checkboxesForInstrument : instrumentCheckboxes.values()) {
		for (JCheckBox checkbox : checkboxesForInstrument) {
		checkbox.setSelected(newCheckboxStates[i++]);
		}
		}
		}