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 ArrayList selected;
  24         private Insets insets;
  25         private int ticksPerSixteenth, popupY = 0;
  26         protected static int viewLength = 0;
  27         protected static int extraHeight = 0;
  28         public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
  29
  30         /**
  31          * Creates the trackview.
  32          * @param track The track it represents graphically and operates on.
  33          * @param title The object that is used to manipulate instrument, channel, solo, mute.
  34          */
  35         public MooTrackView (Track track, MooTrackTitle title) {
  36                 super(true);
  37                 this.track = track;
  38                 this.title = title;
  39                 insets = getInsets();
  40                 selected = new ArrayList();
  41
  42                 // Configures panel
  43                 setBackground(Color.white);
  44                 setBorder(BorderFactory.createLineBorder(Color.black));
  45                 setLayout(null);
  46                 setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
  47
  48                 // Creates temporary variables
  49                 MidiEvent note;
  50                 MooNoteElement elem;
  51                 rects = new ArrayList(track.size() / 2);
  52                 extraHeight = Toolkit.getDefaultToolkit().getScreenSize().height - 150;
  53
  54                 // Places note elements
  55                 for (int i = 0; i < track.size(); i++) {
  56                         note = track.get(i);
  57                         if (note instanceof MooNote) {
  58                                 // Adds the note element to the note area and moves it to the appropriate place.
  59                                 MooNote mn = (MooNote)note;
  60                                 elem = new MooNoteElement(this, mn);
  61                                 add(elem);
  62                                 layoutElement(elem, false);
  63                         }
  64                         setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
  65
  66                 }
  67
  68                 // Creates pop-up menu.
  69                 popup = new JPopupMenu();
  70                 PopupListener pList = new PopupListener();
  71                 popupAdd = new JMenuItem("Add note...");
  72                 popupAdd.addActionListener(pList);
  73                 popup.add(popupAdd);
  74
  75                 // Adds listeners for popup menu and keyboard synthesizer.
  76                 addMouseListener(new MAdapter());
  77                 addKeyListener(new MooKeyboard());
  78         }
  79
  80         /**
  81          * Layouts the element to the right place.
  82          * @param elem  the element that will be layouted.
  83          * @param old   If true, this method will remove the old layout and set the new preferredSize for the trackview.
  84          */
  85         public void layoutElement(MooNoteElement elem, boolean old){
  86                 // If the element is currently in the view, removes its coordinates from the list.
  87                 Rectangle r = new Rectangle();
  88                 if (old){
  89                         r = elem.getBounds(r);
  90                         for (Iterator i = rects.iterator(); i.hasNext();){
  91                                 Object ob = i.next();
  92                                 if (r.equals(ob)){
  93                                         rects.remove(ob);
  94                                         break;
  95                                 }
  96                         }
  97                 }
  98
  99                 // Creates temporary variables.
 100                 ticksPerSixteenth = Moosique.getSequence().getResolution() / 4;
 101                 MooNote mn = elem.getNote();
 102                 int x, y, height;
 103
 104                 // Calculates coordinates.
 105                 x = insets.left;
 106                 y = insets.top + (int)(mn.getTick() / ticksPerSixteenth) * NOTE_HEIGHT;
 107                 height = (mn.getDuration() / ticksPerSixteenth) * NOTE_HEIGHT;
 108                 if (height == 0) height = NOTE_HEIGHT;
 109                 r = new Rectangle(x, y, NOTE_WIDTH, height);
 110
 111                 // Places the element in the appropriate place.
 112                 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
 113                 elem.setBounds(r);
 114                 rects.add(r);
 115                 if (viewLength < (y + height)){
 116                         viewLength = y + height;
 117                         if(old)setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 118                 }
 119         }
 120
 121         /**
 122          * Returns the track of this view.
 123          * @return the track of this view
 124          */
 125         public Track getTrack() {
 126                 return track;
 127         }
 128
 129         /**
 130          * Returns the title of this view.
 131          * @return the title of this view
 132          */
 133         public MooTrackTitle getTitle() {
 134                 return title;
 135         }
 136
 137         /**
 138          * Checks if the element can be fully drawn as this position without inteferring with other elements.
 139          * @return true if the position is occupied.
 140          */
 141         private boolean isOccupied(Rectangle r) {
 142                 Iterator it = rects.iterator();
 143                 while (it.hasNext()) {
 144                         if(r.intersects((Rectangle)it.next())) return true;
 145                 }
 146                 return false;
 147         }
 148
 149         /**
 150          * Adds the given note to the current track, and visualises it.
 151          * @param mn    the note to add
 152          */
 153         public void addNote(MooNote mn) {
 154                 mn.addTo(track);
 155                 MooNoteElement elem = new MooNoteElement(this, mn);
 156                 add(elem);
 157                 layoutElement(elem, false);
 158                 setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 159                 repaint();
 160         }
 161
 162         /**
 163          * Removes the given note element from the view and its note from the current track.
 164          * @param elem  the note element to remove
 165          */
 166         public void removeNote(MooNoteElement elem) {
 167                 elem.getNote().removeFrom(track);
 168                 remove(elem);
 169                 elem.getNote().removeFrom(track);
 170                 repaint();
 171         }
 172
 173         /**
 174          * Adds a standard note to this track.
 175          */
 176         private void addStandardNote() {
 177                 int row =  (popupY - insets.top) / NOTE_HEIGHT;
 178                 long timestamp = (long)(ticksPerSixteenth * row);
 179                 addNote(new MooNote(title.getChannel(), 60, 100, timestamp, Moosique.getSequence().getResolution() / 4));
 180         }
 181
 182         /**
 183          * Deselects all notes.
 184          */
 185         public void addSelected(MooNoteElement elem) {
 186                 selected.add(elem);
 187         }
 188
 189         /**
 190          * Deselects all notes.
 191          */
 192         public void removeSelected(MooNoteElement elem) {
 193                 selected.remove(selected.indexOf(elem));
 194         }
 195
 196         /**
 197          * Deselects all notes.
 198          */
 199         public void deselectAll() {
 200                 Iterator it = selected.iterator();
 201                 while(it.hasNext()) {
 202                         ((MooNoteElement)it.next()).deselect();
 203                 }
 204                 selected.clear();
 205         }
 206
 207         /**
 208          * Draws the grid that is on the background.
 209          * @param g The Graphics object used to draw the grid.
 210          */
 211         public void paintComponent(Graphics g) {
 212                 super.paintComponent(g);
 213                 Graphics2D g2 = (Graphics2D)g;
 214                 for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
 215                         for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
 216                                 box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 217                                 g2.setColor(Color.gray);
 218                                 g2.draw(box);
 219                         }
 220                 }
 221         }
 222
 223         /**
 224          * The adapter used to listen on mouse actions
 225          */
 226         class MAdapter extends MouseAdapter {
 227
 228                 /**
 229                  * Deselects all note on click, adds a standard note on double click.
 230                  */
 231                 public void mouseClicked(MouseEvent e) {
 232                         deselectAll();
 233                         if (e.getClickCount() == 2) {
 234                                 popupY = e.getY();
 235                                 addStandardNote();
 236                         }
 237                 }
 238
 239                 public void mousePressed(MouseEvent e) {
 240                         maybeShowPopup(e);
 241                 }
 242
 243                 public void mouseReleased(MouseEvent e) {
 244                         maybeShowPopup(e);
 245                 }
 246
 247                 /**
 248                  * Shows the menu if an OS-specific popup-trigger was activated.
 249                  */
 250                 private void maybeShowPopup(MouseEvent e) {
 251                         if (e.isPopupTrigger()) {
 252                                 popupY = e.getY();
 253                                 popup.show(e.getComponent(), e.getX(), e.getY());
 254                         }
 255                 }
 256
 257                 /**
 258                  * Grabs the focus when the mouse has entered.
 259                  */
 260                 public void mouseEntered(MouseEvent e) {
 261                         // Moosique.setActiveChannel(track.getChannel());
 262                         grabFocus();
 263                 }
 264         }
 265
 266         /**
 267          * Listens on actions on the popupmenu and executes the appropriate action.
 268          */
 269         class PopupListener implements ActionListener {
 270                 public void actionPerformed(ActionEvent e) {
 271                         Object source = e.getSource();
 272                         if  (source == popupAdd) {
 273                                 addStandardNote();
 274                         }
 275                         // new MooNote(int channel, int pitch, int velocity, long timestamp, int duration)
 276                 }
 277         }
 278 }