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, selPopup;
  21         private JMenu selPopupTranspUp, selPopupTranspDown;
  22         private JMenuItem popupAdd;
  23         private JMenuItem selPopupRemove, selPopupTranspUpOct, selPopupTranspDownOct;
  24
  25         private ArrayList rects;
  26         private ArrayList selected;
  27         private Insets insets;
  28         private int ticksPerSixteenth, popupY = 0;
  29         protected static int viewLength = 0;
  30         protected static int extraHeight = 0;
  31         public static final int NOTE_HEIGHT = 10, NOTE_WIDTH = 40, VIEW_WIDTH = 200;
  32
  33         /**
  34          * Creates the trackview.
  35          * @param track The track it represents graphically and operates on.
  36          * @param title The object that is used to manipulate instrument, channel, solo, mute.
  37          */
  38         public MooTrackView (Track track, MooTrackTitle title) {
  39                 super(true);
  40                 this.track = track;
  41                 this.title = title;
  42                 insets = getInsets();
  43                 selected = new ArrayList();
  44
  45                 // Configures panel
  46                 setBackground(Color.white);
  47                 setBorder(BorderFactory.createLineBorder(Color.black));
  48                 setLayout(null);
  49                 setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
  50
  51                 // Creates temporary variables
  52                 MidiEvent note;
  53                 MooNoteElement elem;
  54                 rects = new ArrayList(track.size() / 2);
  55                 extraHeight = Toolkit.getDefaultToolkit().getScreenSize().height - 150;
  56
  57                 // Places note elements
  58                 for (int i = 0; i < track.size(); i++) {
  59                         note = track.get(i);
  60                         if (note instanceof MooNote) {
  61                                 // Adds the note element to the note area and moves it to the appropriate place.
  62                                 MooNote mn = (MooNote)note;
  63                                 elem = new MooNoteElement(this, mn);
  64                                 add(elem);
  65                                 layoutElement(elem, false);
  66                         }
  67                         setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
  68
  69                 }
  70
  71                 // Creates panel pop-up menu.
  72                 popup = new JPopupMenu();
  73                 PopupListener pList = new PopupListener();
  74                 popupAdd = new JMenuItem("Add note...");
  75                 popupAdd.addActionListener(pList);
  76                 popup.add(popupAdd);
  77
  78                 // Creates selection pop-up menu.
  79                 selPopup = new JPopupMenu();
  80                 selPopupRemove = new JMenuItem("Remove selection");
  81                 selPopupRemove.addActionListener(pList);
  82                 selPopup.add(selPopupRemove);
  83                 selPopupTranspUp = new JMenu("Transpose selection up");
  84                 selPopup.add(selPopupTranspUp);
  85                 selPopupTranspUpOct = new JMenuItem("One octave");
  86                 selPopupTranspUpOct.addActionListener(pList);
  87                 selPopupTranspUp.add(selPopupTranspUpOct);
  88                 selPopupTranspDown = new JMenu("Transpose selection down");
  89                 selPopup.add(selPopupTranspDown);
  90                 selPopupTranspDownOct = new JMenuItem("One octave");
  91                 selPopupTranspDownOct.addActionListener(pList);
  92                 selPopupTranspDown.add(selPopupTranspDownOct);
  93
  94                 // Adds listeners for popup menu and keyboard synthesizer.
  95                 addMouseListener(new MAdapter());
  96                 addKeyListener(new MooKeyboard());
  97         }
  98
  99         /**
 100          * Layouts the element to the right place.
 101          * @param elem  the element that will be layouted.
 102          * @param old   If true, this method will remove the old layout and set the new preferredSize for the trackview.
 103          */
 104         public void layoutElement(MooNoteElement elem, boolean old){
 105                 // If the element is currently in the view, removes its coordinates from the list.
 106                 Rectangle r = new Rectangle();
 107                 if (old){
 108                         r = elem.getBounds(r);
 109                         for (Iterator i = rects.iterator(); i.hasNext();){
 110                                 Object ob = i.next();
 111                                 if (r.equals(ob)){
 112                                         rects.remove(ob);
 113                                         break;
 114                                 }
 115                         }
 116                 }
 117
 118                 // Creates temporary variables.
 119                 ticksPerSixteenth = Moosique.getSequence().getResolution() / 4;
 120                 MooNote mn = elem.getNote();
 121                 int x, y, height;
 122
 123                 // Calculates coordinates.
 124                 x = insets.left;
 125                 y = insets.top + (int)(mn.getTick() / ticksPerSixteenth) * NOTE_HEIGHT;
 126                 height = (mn.getDuration() / ticksPerSixteenth) * NOTE_HEIGHT;
 127                 if (height == 0) height = NOTE_HEIGHT;
 128                 r = new Rectangle(x, y, NOTE_WIDTH, height);
 129
 130                 // Places the element in the appropriate place.
 131                 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
 132                 elem.setBounds(r);
 133                 rects.add(r);
 134                 if (viewLength < (y + height)){
 135                         viewLength = y + height;
 136                         if(old)setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 137                 }
 138                 if(old)repaint();
 139         }
 140
 141         /**
 142          * Returns the track of this view.
 143          * @return the track of this view
 144          */
 145         public Track getTrack() {
 146                 return track;
 147         }
 148
 149         /**
 150          * Returns the title of this view.
 151          * @return the title of this view
 152          */
 153         public MooTrackTitle getTitle() {
 154                 return title;
 155         }
 156
 157         /**
 158          * Checks if the element can be fully drawn as this position without inteferring with other elements.
 159          * @return true if the position is occupied.
 160          */
 161         private boolean isOccupied(Rectangle r) {
 162                 Iterator it = rects.iterator();
 163                 while (it.hasNext()) {
 164                         if(r.intersects((Rectangle)it.next())) return true;
 165                 }
 166                 return false;
 167         }
 168
 169         /**
 170          * Adds the given note to the current track, and visualises it.
 171          * @param mn    the note to add
 172          */
 173         public void addNote(MooNote mn) {
 174                 mn.addTo(track);
 175                 MooNoteElement elem = new MooNoteElement(this, mn);
 176                 add(elem);
 177                 layoutElement(elem, false);
 178                 setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
 179                 Moosique.setEdited();
 180                 repaint();
 181         }
 182
 183         /**
 184          * Adds a standard note to this track.
 185          */
 186         private void addStandardNote() {
 187                 int row =  (popupY - insets.top) / NOTE_HEIGHT;
 188                 long timestamp = (long)(ticksPerSixteenth * row);
 189                 addNote(new MooNote(title.getChannel(), 60, 100, timestamp, Moosique.getSequence().getResolution() / 4));
 190         }
 191
 192         /**
 193          * Removes the given note element from the view and its note from the current track.
 194          * @param elem  the note element to remove
 195          */
 196         public void removeNote(MooNoteElement elem) {
 197                 elem.getNote().removeFrom(track);
 198                 remove(elem);
 199                 Rectangle r = new Rectangle();
 200                 r = elem.getBounds(r);
 201                 rects.remove(r);
 202                 Moosique.setEdited();
 203                 repaint();
 204         }
 205
 206         /**
 207          * Deselects all notes.
 208          */
 209         public void selectNote(MooNoteElement elem) {
 210                 selected.add(elem);
 211         }
 212
 213         /**
 214          * Deselects all notes.
 215          */
 216         public void deselectNote(MooNoteElement elem) {
 217                 selected.remove(selected.indexOf(elem));
 218         }
 219
 220         /**
 221          * Deselects all notes.
 222          */
 223         public void deselectAllNotes() {
 224                 Iterator it = selected.iterator();
 225                 while(it.hasNext()) {
 226                         ((MooNoteElement)it.next()).deselect();
 227                 }
 228                 selected.clear();
 229         }
 230
 231         /**
 232          * Determines if the given MooNoteElement is the only one in the track view that is selected.
 233          * @return if the given element is the only selected one
 234          */
 235         public boolean isTheOnlySelected(MooNoteElement elem) {
 236                 Iterator it = selected.iterator();
 237                 while(it.hasNext()) {
 238                         if (!it.next().equals(elem)) return false;
 239                 }
 240                 return true;
 241         }
 242
 243         /**
 244          * Shows a popup-menu with options for the current selection of note elements.
 245          * @param c     the component over which to display the menu
 246          * @param x     the x-coordinate in which to display the menu
 247          * @param y     the y-coordinate in which to display the menu
 248          */
 249         public void showSelectionPopup(Component c, int x, int y) {
 250                 selPopup.show(c, x, y);
 251         }
 252
 253         /**
 254          * Transposes all selected notes the given number of halftones.
 255          */
 256         private void transposeSelectedNotes(int halftones) {
 257                 Iterator it = selected.iterator();
 258                 while(it.hasNext()) {
 259                         MooNoteElement elem = (MooNoteElement)it.next();
 260                         elem.getNote().transpose(halftones);
 261                         elem.update();
 262                 }
 263         }
 264
 265         /**
 266          * Draws the grid that is on the background.
 267          * @param g The Graphics object used to draw the grid.
 268          */
 269         public void paintComponent(Graphics g) {
 270                 super.paintComponent(g);
 271                 Graphics2D g2 = (Graphics2D)g;
 272                 for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
 273                         for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
 274                                 box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
 275                                 g2.setColor(Color.gray);
 276                                 g2.draw(box);
 277                         }
 278                 }
 279         }
 280
 281         /**
 282          * The adapter used to listen on mouse actions
 283          */
 284         class MAdapter extends MouseAdapter {
 285
 286                 /**
 287                  * Deselects all note on click, adds a standard note on double click.
 288                  */
 289                 public void mouseClicked(MouseEvent e) {
 290                         if (SwingUtilities.isLeftMouseButton(e)) {
 291                                 deselectAllNotes();
 292                                 if (e.getClickCount() == 2) {
 293                                         popupY = e.getY();
 294                                         addStandardNote();
 295                                 }
 296                         }
 297                 }
 298
 299                 public void mousePressed(MouseEvent e) {
 300                         maybeShowPopup(e);
 301                 }
 302
 303                 public void mouseReleased(MouseEvent e) {
 304                         maybeShowPopup(e);
 305                 }
 306
 307                 /**
 308                  * Selects the notes within the area that was selected.
 309                  */
 310                 public void mouseDragged(MouseEvent e) {
 311
 312                 }
 313
 314                 /**
 315                  * Shows the menu if an OS-specific popup-trigger was activated.
 316                  */
 317                 private void maybeShowPopup(MouseEvent e) {
 318                         if (e.isPopupTrigger()) {
 319                                 popupY = e.getY();
 320                                 popup.show(e.getComponent(), e.getX(), e.getY());
 321                         }
 322                 }
 323
 324                 /**
 325                  * Grabs the focus when the mouse has entered.
 326                  */
 327                 public void mouseEntered(MouseEvent e) {
 328                         // Moosique.setActiveChannel(track.getChannel());
 329                         grabFocus();
 330                 }
 331         }
 332
 333         /**
 334          * Listens on actions on the popup menu and executes the appropriate action.
 335          */
 336         class PopupListener implements ActionListener {
 337                 public void actionPerformed(ActionEvent e) {
 338                         Object source = e.getSource();
 339                         if (source == popupAdd) {
 340                                 addStandardNote();
 341                         } else if (source == selPopupRemove) {
 342                                 Iterator it = selected.iterator();
 343                                 while(it.hasNext()) {
 344                                         removeNote((MooNoteElement)it.next());
 345                                 }
 346                                 selected.clear();
 347                         } else if (source == selPopupTranspUpOct) {
 348                                 transposeSelectedNotes(12);
 349                         } else if (source == selPopupTranspDownOct) {
 350                                 transposeSelectedNotes(-12);
 351                         }
 352                 }
 353         }
 354 }