MooTrackView.java

   1 import javax.swing.*;
   2 import java.awt.*;
   3 import java.awt.event.*;
   4 import javax.sound.midi.*;
   5 import java.util.*;
   6
   7 /**
   8  * Graphical representation of a MIDI track.
   9  *
  10  * @author  Andersson , Andreen, Lanneskog, Pehrson
  11  * @version 1
  12  */
  13
  14 public class MooTrackView extends JPanel {
  15
  16         private Track track;
  17         private MooTrackTitle title;
  18         private Rectangle box;
  19
  20         private JPopupMenu popup;
  21         private JMenuItem popupAdd;
  22         private ArrayList rects;
  23         private Insets insets;
  24         private int ticksPerSixteenth, popupY = 0;
  25         protected static int viewLength = 0;
  26         protected static int extraHeight = 0;
  27         public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
  28
  29         public MooTrackView (Track track, MooTrackTitle title) {
  30                 super(true);
  31                 this.track = track;
  32                 this.title = title;
  33                 insets = getInsets();
  34
  35                 // Configures panel
  36                 setBackground(Color.white);
  37                 setBorder(BorderFactory.createLineBorder(Color.black));
  38                 setLayout(null);
  39                 setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
  40
  41                 // Creates temporary variables
  42                 MidiEvent note;
  43                 MooNoteElement elem;
  44                 rects = new ArrayList(track.size() / 2);
  45                 extraHeight = Toolkit.getDefaultToolkit().getScreenSize().height - 150;
  46
  47                 // Places note elements
  48                 for (int i = 0; i < track.size(); i++) {
  49                         note = track.get(i);
  50                         if (note instanceof MooNote) {
  51                                 // Adds the note element to the note area and moves it to the appropriate place.
  52                                 MooNote mn = (MooNote)note;
  53                                 elem = new MooNoteElement(this, mn);
  54                                 add(elem);
  55                                 layoutElement(elem, false);
  56                         }
  57                         setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
  58
  59                 }
  60
  61                 // Creates pop-up menu.
  62                 popup = new JPopupMenu();
  63                 PopupListener pList = new PopupListener();
  64                 popupAdd = new JMenuItem("Add note...");
  65                 popupAdd.addActionListener(pList);
  66                 popup.add(popupAdd);
  67
  68                 // Adds listeners for popup menu and keyboard synthesizer.
  69                 addMouseListener(new MAdapter());
  70                 addKeyListener(new MooKeyboard());
  71         }
  72
  73         public void layoutElement(MooNoteElement elem, boolean old){
  74                 // If the element is currently in the view, removes its coordinates from the list.
  75                 Rectangle r = new Rectangle();
  76                 if (old){
  77                         r = elem.getBounds(r);
  78                         for (Iterator i = rects.iterator(); i.hasNext();){
  79                                 Object ob = i.next();
  80                                 if (r.equals(ob)){
  81                                         rects.remove(ob);
  82                                         break;
  83                                 }
  84                         }
  85                 }
  86
  87                 // Creates temporary variables.
  88                 ticksPerSixteenth = Moosique.getSequence().getResolution() / 4;
  89                 MooNote mn = elem.getNote();
  90                 int x, y, height;
  91
  92                 // Calculates coordinates.
  93                 x = insets.left;
  94                 y = insets.top + (int)(mn.getTick() / ticksPerSixteenth) * NOTE_HEIGHT;
  95                 height = (mn.getDuration() / ticksPerSixteenth) * NOTE_HEIGHT;
  96                 if (height == 0) height = NOTE_HEIGHT;
  97                 r = new Rectangle(x, y, NOTE_WIDTH, height);
  98
  99                 // Places the element in the appropriate place.
 100                 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
 101                 elem.setBounds(r);
 102                 rects.add(r);
 103                 if (viewLength < (y + height)){
 104                         viewLength = y + height;
 105                         if(old)setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 106                 }
 107         }
 108
 109         /**
 110          * Returns the track of this view.
 111          * @return the track of this view
 112          */
 113         public Track getTrack() {
 114                 return track;
 115         }
 116
 117         /**
 118          * Returns the title of this view.
 119          * @return the title of this view
 120          */
 121         public MooTrackTitle getTitle() {
 122                 return title;
 123         }
 124
 125         private boolean isOccupied(Rectangle r) {
 126                 Iterator it = rects.iterator();
 127                 while (it.hasNext()) {
 128                         if(r.intersects((Rectangle)it.next())) return true;
 129                 }
 130                 return false;
 131         }
 132
 133         /**
 134          * Adds the given note to the current track, and visualises it.
 135          * @param mn    the note to add
 136          */
 137         public void addNote(MooNote mn) {
 138                 mn.addTo(track);
 139                 MooNoteElement elem = new MooNoteElement(this, mn);
 140                 add(elem);
 141                 layoutElement(elem, false);
 142                 setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 143                 repaint();
 144         }
 145
 146         /**
 147          * Removes the given note element from the view and its note from the current track.
 148          * @param elem  the note element to remove
 149          */
 150         public void removeNote(MooNoteElement elem) {
 151                 elem.getNote().removeFrom(track);
 152                 remove(elem);
 153                 elem.getNote().removeFrom(track);
 154                 repaint();
 155         }
 156
 157         private void addStandardNote() {
 158                 long timestamp = (long)(ticksPerSixteenth * (popupY - insets.top) / NOTE_HEIGHT);
 159                 System.out.println(ticksPerSixteenth + ", " + popupY + ", " + insets.top + ", " + timestamp);
 160                 addNote(new MooNote(title.getChannel(), 60, 100, timestamp, Moosique.getSequence().getResolution() / 4));
 161         }
 162
 163         public void paintComponent(Graphics g) {
 164                 super.paintComponent(g);
 165                 Graphics2D g2 = (Graphics2D)g;
 166                 for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
 167                         for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
 168                                 box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 169                                 g2.setColor(Color.gray);
 170                                 g2.draw(box);
 171                         }
 172                 }
 173         }
 174
 175         class MAdapter extends MouseAdapter {
 176                 public void mouseClicked(MouseEvent e) {
 177                         if (e.getClickCount() == 2) {
 178                                 popupY = e.getY();
 179                                 addStandardNote();
 180                         }
 181                 }
 182
 183                 public void mousePressed(MouseEvent e) {
 184                         if (e.isPopupTrigger()) {
 185                                 popupY = e.getY();
 186                                 popup.show(e.getComponent(), e.getX(), e.getY());
 187                         }
 188                 }
 189
 190                 public void mouseEntered(MouseEvent e) {
 191                         // Moosique.setActiveChannel(track.getChannel());
 192                         grabFocus();
 193                 }
 194         }
 195
 196         class PopupListener implements ActionListener {
 197                 public void actionPerformed(ActionEvent e) {
 198                         Object source = e.getSource();
 199                         if  (source == popupAdd) {
 200                                 addStandardNote();
 201                         }
 202                         // new MooNote(int channel, int pitch, int velocity, long timestamp, int duration)
 203                 }
 204         }
 205 }