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