复合模式-MVC

package N_Composite.mvc;

import javax.swing.*;

public class BeatBar extends JProgressBar implements Runnable {
private static final long serialVersionUID = 2L;
JProgressBar progressBar;
Thread thread;

public BeatBar() {    thread = new Thread(this);    setMaximum(100);    thread.start();}public void run() {    for(;;) {        int value = getValue();        value = (int)(value * .75);        setValue(value);        repaint();        try {            Thread.sleep(50);        } catch (Exception e) {};    }}

}
package N_Composite.mvc;

public class BeatController implements ControllerInterface {
BeatModelInterface model;
DJView view;

public BeatController(BeatModelInterface model) {    this.model = model;    view = new DJView(this, model);    view.createView();    view.createControls();    view.disableStopMenuItem();    view.enableStartMenuItem();    model.initialize();}public void start() {    model.on();    view.disableStartMenuItem();    view.enableStopMenuItem();}public void stop() {    model.off();    view.disableStopMenuItem();    view.enableStartMenuItem();}public void increaseBPM() {    int bpm = model.getBPM();    model.setBPM(bpm + 1);}public void decreaseBPM() {    int bpm = model.getBPM();    model.setBPM(bpm - 1);}public void setBPM(int bpm) {    model.setBPM(bpm);}

}
package N_Composite.mvc;

import javax.sound.midi.*;

import java.util.*;

public class BeatModel implements BeatModelInterface, MetaEventListener {
Sequencer sequencer;
ArrayList beatObservers = new ArrayList();
ArrayList bpmObservers = new ArrayList();
int bpm = 90;
Sequence sequence;
Track track;

public void initialize() {    setUpMidi();    buildTrackAndStart();}public void on() {    System.out.println("Starting the sequencer");    sequencer.start();    setBPM(90);}public void off() {    setBPM(0);    sequencer.stop();}public void setBPM(int bpm) {    this.bpm = bpm;    sequencer.setTempoInBPM(getBPM());    notifyBPMObservers();}public int getBPM() {    return bpm;}void beatEvent() {    notifyBeatObservers();}public void registerObserver(BeatObserver o) {    beatObservers.add(o);}public void notifyBeatObservers() {    for(int i = 0; i < beatObservers.size(); i++) {        BeatObserver observer = (BeatObserver)beatObservers.get(i);        observer.updateBeat();    }}public void registerObserver(BPMObserver o) {    bpmObservers.add(o);}public void notifyBPMObservers() {    for(int i = 0; i < bpmObservers.size(); i++) {        BPMObserver observer = (BPMObserver)bpmObservers.get(i);        observer.updateBPM();    }}public void removeObserver(BeatObserver o) {    int i = beatObservers.indexOf(o);    if (i >= 0) {        beatObservers.remove(i);    }}public void removeObserver(BPMObserver o) {    int i = bpmObservers.indexOf(o);    if (i >= 0) {        bpmObservers.remove(i);    }}public void meta(MetaMessage message) {    if (message.getType() == 47) {        beatEvent();        sequencer.start();        setBPM(getBPM());    }}public void setUpMidi() {    try {        sequencer = MidiSystem.getSequencer();        sequencer.open();        sequencer.addMetaEventListener(this);        sequence = new Sequence(Sequence.PPQ,4);        track = sequence.createTrack();        sequencer.setTempoInBPM(getBPM());        sequencer.setLoopCount(Sequencer.LOOP_CONTINUOUSLY);    } catch(Exception e) {        e.printStackTrace();    }} public void buildTrackAndStart() {    int[] trackList = {35, 0, 46, 0};    sequence.deleteTrack(null);    track = sequence.createTrack();    makeTracks(trackList);    track.add(makeEvent(192,9,1,0,4));          try {        sequencer.setSequence(sequence);                        } catch(Exception e) {        e.printStackTrace();    }} public void makeTracks(int[] list) {            for (int i = 0; i < list.length; i++) {        int key = list[i];        if (key != 0) {            track.add(makeEvent(144,9,key, 100, i));            track.add(makeEvent(128,9,key, 100, i+1));        }    }}public  MidiEvent makeEvent(int comd, int chan, 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);    } catch(Exception e) {        e.printStackTrace();     }    return event;}

}
package N_Composite.mvc;

/**
* 节拍模型
*/
public interface BeatModelInterface {

void initialize();void on();void off();void setBPM(int bpm);int getBPM();void registerObserver(BeatObserver o);void removeObserver(BeatObserver o);void registerObserver(BPMObserver o);void removeObserver(BPMObserver o);

}
package N_Composite.mvc;

public interface BeatObserver {
void updateBeat();
}
package N_Composite.mvc;

public interface BPMObserver {
void updateBPM();
}
package N_Composite.mvc;

public interface ControllerInterface {
void start();
void stop();
void increaseBPM();
void decreaseBPM();
void setBPM(int bpm);
}
package N_Composite.mvc;

public class DJTestDrive {

public static void main (String[] args) {    BeatModelInterface model = new BeatModel();    ControllerInterface controller = new BeatController(model);}

}
package N_Composite.mvc;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class DJView implements ActionListener, BeatObserver, BPMObserver {
BeatModelInterface model;
ControllerInterface controller;
JFrame viewFrame;
JPanel viewPanel;
BeatBar beatBar;
JLabel bpmOutputLabel;
JFrame controlFrame;
JPanel controlPanel;
JLabel bpmLabel;
JTextField bpmTextField;
JButton setBPMButton;
JButton increaseBPMButton;
JButton decreaseBPMButton;
JMenuBar menuBar;
JMenu menu;
JMenuItem startMenuItem;
JMenuItem stopMenuItem;

public DJView(ControllerInterface controller, BeatModelInterface model) {       this.controller = controller;    this.model = model;    model.registerObserver((BeatObserver)this);    model.registerObserver((BPMObserver)this);}public void createView() {    // Create all Swing components here    viewPanel = new JPanel(new GridLayout(1, 2));    viewFrame = new JFrame("View");    viewFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    viewFrame.setSize(new Dimension(100, 80));    bpmOutputLabel = new JLabel("offline", SwingConstants.CENTER);    beatBar = new BeatBar();    beatBar.setValue(0);    JPanel bpmPanel = new JPanel(new GridLayout(2, 1));    bpmPanel.add(beatBar);    bpmPanel.add(bpmOutputLabel);    viewPanel.add(bpmPanel);    viewFrame.getContentPane().add(viewPanel, BorderLayout.CENTER);    viewFrame.pack();    viewFrame.setVisible(true);}public void createControls() {    // Create all Swing components here    JFrame.setDefaultLookAndFeelDecorated(true);    controlFrame = new JFrame("Control");    controlFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    controlFrame.setSize(new Dimension(100, 80));    controlPanel = new JPanel(new GridLayout(1, 2));    menuBar = new JMenuBar();    menu = new JMenu("DJ Control");    startMenuItem = new JMenuItem("Start");    menu.add(startMenuItem);    startMenuItem.addActionListener(new ActionListener() {        public void actionPerformed(ActionEvent event) {            controller.start();        }    });    stopMenuItem = new JMenuItem("Stop");    menu.add(stopMenuItem);     stopMenuItem.addActionListener(new ActionListener() {        public void actionPerformed(ActionEvent event) {            controller.stop();        }    });    JMenuItem exit = new JMenuItem("Quit");    exit.addActionListener(new ActionListener() {        public void actionPerformed(ActionEvent event) {            System.exit(0);        }    });    menu.add(exit);    menuBar.add(menu);    controlFrame.setJMenuBar(menuBar);    bpmTextField = new JTextField(2);    bpmLabel = new JLabel("Enter BPM:", SwingConstants.RIGHT);    setBPMButton = new JButton("Set");    setBPMButton.setSize(new Dimension(10,40));    increaseBPMButton = new JButton(">>");    decreaseBPMButton = new JButton("<<");    setBPMButton.addActionListener(this);    increaseBPMButton.addActionListener(this);    decreaseBPMButton.addActionListener(this);    JPanel buttonPanel = new JPanel(new GridLayout(1, 2));    buttonPanel.add(decreaseBPMButton);    buttonPanel.add(increaseBPMButton);    JPanel enterPanel = new JPanel(new GridLayout(1, 2));    enterPanel.add(bpmLabel);    enterPanel.add(bpmTextField);    JPanel insideControlPanel = new JPanel(new GridLayout(3, 1));    insideControlPanel.add(enterPanel);    insideControlPanel.add(setBPMButton);    insideControlPanel.add(buttonPanel);    controlPanel.add(insideControlPanel);    bpmLabel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));    bpmOutputLabel.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));    controlFrame.getRootPane().setDefaultButton(setBPMButton);    controlFrame.getContentPane().add(controlPanel, BorderLayout.CENTER);    controlFrame.pack();    controlFrame.setVisible(true);}public void enableStopMenuItem() {    stopMenuItem.setEnabled(true);}public void disableStopMenuItem() {    stopMenuItem.setEnabled(false);}public void enableStartMenuItem() {    startMenuItem.setEnabled(true);}public void disableStartMenuItem() {    startMenuItem.setEnabled(false);}public void actionPerformed(ActionEvent event) {    if (event.getSource() == setBPMButton) {        int bpm = Integer.parseInt(bpmTextField.getText());        controller.setBPM(bpm);    } else if (event.getSource() == increaseBPMButton) {        controller.increaseBPM();    } else if (event.getSource() == decreaseBPMButton) {        controller.decreaseBPM();    }}public void updateBPM() {    if (model != null) {        int bpm = model.getBPM();        if (bpm == 0) {            if (bpmOutputLabel != null) {                bpmOutputLabel.setText("offline");            }        } else {            if (bpmOutputLabel != null) {                bpmOutputLabel.setText("Current BPM: " + model.getBPM());            }        }    }}public void updateBeat() {    if (beatBar != null) {         beatBar.setValue(100);    }}

}
package N_Composite.mvc;

public class HeartAdapter implements BeatModelInterface {
HeartModelInterface heart;

public HeartAdapter(HeartModelInterface heart) {    this.heart = heart;}public void initialize() {}public void on() {}public void off() {}public int getBPM() {    return heart.getHeartRate();}public void setBPM(int bpm) {}public void registerObserver(BeatObserver o) {    heart.registerObserver(o);}public void removeObserver(BeatObserver o) {    heart.removeObserver(o);}public void registerObserver(BPMObserver o) {    heart.registerObserver(o);}public void removeObserver(BPMObserver o) {    heart.removeObserver(o);}

}
package N_Composite.mvc;

public class HeartController implements ControllerInterface {
HeartModelInterface model;
DJView view;

public HeartController(HeartModelInterface model) {    this.model = model;    view = new DJView(this, new HeartAdapter(model));    view.createView();    view.createControls();    view.disableStopMenuItem();    view.disableStartMenuItem();}public void start() {}public void stop() {}public void increaseBPM() {}public void decreaseBPM() {}public void setBPM(int bpm) {}

}

package N_Composite.mvc;

import java.util.*;

public class HeartModel implements HeartModelInterface, Runnable {
ArrayList beatObservers = new ArrayList();
ArrayList bpmObservers = new ArrayList();
int time = 1000;
int bpm = 90;
Random random = new Random(System.currentTimeMillis());
Thread thread;

public HeartModel() {    thread = new Thread(this);    thread.start();}public void run() {    int lastrate = -1;    for(;;) {        int change = random.nextInt(10);        if (random.nextInt(2) == 0) {            change = 0 - change;        }        int rate = 60000/(time + change);        if (rate < 120 && rate > 50) {            time += change;            notifyBeatObservers();            if (rate != lastrate) {                lastrate = rate;                notifyBPMObservers();            }        }        try {            Thread.sleep(time);        } catch (Exception e) {}    }}public int getHeartRate() {    return 60000/time;}public void registerObserver(BeatObserver o) {    beatObservers.add(o);}public void removeObserver(BeatObserver o) {    int i = beatObservers.indexOf(o);    if (i >= 0) {        beatObservers.remove(i);    }}public void notifyBeatObservers() {    for(int i = 0; i < beatObservers.size(); i++) {        BeatObserver observer = (BeatObserver)beatObservers.get(i);        observer.updateBeat();    }}public void registerObserver(BPMObserver o) {    bpmObservers.add(o);}public void removeObserver(BPMObserver o) {    int i = bpmObservers.indexOf(o);    if (i >= 0) {        bpmObservers.remove(i);    }}public void notifyBPMObservers() {    for(int i = 0; i < bpmObservers.size(); i++) {        BPMObserver observer = (BPMObserver)bpmObservers.get(i);        observer.updateBPM();    }}

}
package N_Composite.mvc;

public interface HeartModelInterface {
int getHeartRate();
void registerObserver(BeatObserver o);
void removeObserver(BeatObserver o);
void registerObserver(BPMObserver o);
void removeObserver(BPMObserver o);
}
package N_Composite.mvc;

public class HeartTestDrive {

public static void main (String[] args) {    HeartModel heartModel = new HeartModel();    ControllerInterface model = new HeartController(heartModel);}

}