3 import java.awt.event.*;
4 import javax.sound.midi.*;
8 * Graphical representation of a MIDI track.
10 * @author Andersson , Andreen, Lanneskog, Pehrson
14 public class MooTrackView extends JPanel {
17 private MooTrackTitle title;
18 private Rectangle box;
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;
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.
35 public MooTrackView (Track track, MooTrackTitle title) {
40 selected = new ArrayList();
43 setBackground(Color.white);
44 setBorder(BorderFactory.createLineBorder(Color.black));
46 setPreferredSize(new Dimension(VIEW_WIDTH, 140 * NOTE_HEIGHT));
48 // Creates temporary variables
51 rects = new ArrayList(track.size() / 2);
52 extraHeight = Toolkit.getDefaultToolkit().getScreenSize().height - 150;
54 // Places note elements
55 for (int i = 0; i < track.size(); 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);
62 layoutElement(elem, false);
64 setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
68 // Creates pop-up menu.
69 popup = new JPopupMenu();
70 PopupListener pList = new PopupListener();
71 popupAdd = new JMenuItem("Add note...");
72 popupAdd.addActionListener(pList);
75 // Adds listeners for popup menu and keyboard synthesizer.
76 addMouseListener(new MAdapter());
77 addKeyListener(new MooKeyboard());
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.
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();
89 r = elem.getBounds(r);
90 for (Iterator i = rects.iterator(); i.hasNext();){
99 // Creates temporary variables.
100 ticksPerSixteenth = Moosique.getSequence().getResolution() / 4;
101 MooNote mn = elem.getNote();
104 // Calculates coordinates.
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);
111 // Places the element in the appropriate place.
112 while(isOccupied(r)) r.translate(NOTE_WIDTH, 0);
115 if (viewLength < (y + height)){
116 viewLength = y + height;
117 if(old)setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
123 * Returns the track of this view.
124 * @return the track of this view
126 public Track getTrack() {
131 * Returns the title of this view.
132 * @return the title of this view
134 public MooTrackTitle getTitle() {
139 * Checks if the element can be fully drawn as this position without inteferring with other elements.
140 * @return true if the position is occupied.
142 private boolean isOccupied(Rectangle r) {
143 Iterator it = rects.iterator();
144 while (it.hasNext()) {
145 if(r.intersects((Rectangle)it.next())) return true;
151 * Adds the given note to the current track, and visualises it.
152 * @param mn the note to add
154 public void addNote(MooNote mn) {
156 MooNoteElement elem = new MooNoteElement(this, mn);
158 layoutElement(elem, false);
159 setPreferredSize(new Dimension(VIEW_WIDTH, viewLength + extraHeight));
160 Moosique.setEdited();
165 * Removes the given note element from the view and its note from the current track.
166 * @param elem the note element to remove
168 public void removeNote(MooNoteElement elem) {
169 elem.getNote().removeFrom(track);
171 elem.getNote().removeFrom(track);
172 Moosique.setEdited();
177 * Adds a standard note to this track.
179 private void addStandardNote() {
180 int row = (popupY - insets.top) / NOTE_HEIGHT;
181 long timestamp = (long)(ticksPerSixteenth * row);
182 addNote(new MooNote(title.getChannel(), 60, 100, timestamp, Moosique.getSequence().getResolution() / 4));
186 * Deselects all notes.
188 public void addSelected(MooNoteElement elem) {
193 * Deselects all notes.
195 public void removeSelected(MooNoteElement elem) {
196 selected.remove(selected.indexOf(elem));
200 * Deselects all notes.
202 public void deselectAll() {
203 Iterator it = selected.iterator();
204 while(it.hasNext()) {
205 ((MooNoteElement)it.next()).deselect();
211 * Determines if the given MooNoteElement is the only one in the track view that is selected.
212 * @return if the given element is the only selected one
214 public boolean isTheOnlySelected(MooNoteElement elem) {
215 Iterator it = selected.iterator();
216 while(it.hasNext()) {
217 if (!it.next().equals(elem)) return false;
223 * Shows a popup-menu with options for the current selection of note elements.
224 * @param c the component over which to display the menu
225 * @param x the x-coordinate in which to display the menu
226 * @param y the y-coordinate in which to display the menu
228 public void showSelectionPopup(Component c, int x, int y) {
233 * Draws the grid that is on the background.
234 * @param g The Graphics object used to draw the grid.
236 public void paintComponent(Graphics g) {
237 super.paintComponent(g);
238 Graphics2D g2 = (Graphics2D)g;
239 for (int c = 0; c < viewLength || c < getHeight(); c += NOTE_HEIGHT) {
240 for (int r = 0; r < (10 * NOTE_WIDTH); r += NOTE_WIDTH) {
241 box = new Rectangle(r, c, NOTE_WIDTH, NOTE_HEIGHT);
242 g2.setColor(Color.gray);
249 * The adapter used to listen on mouse actions
251 class MAdapter extends MouseAdapter {
254 * Deselects all note on click, adds a standard note on double click.
256 public void mouseClicked(MouseEvent e) {
258 if (e.getClickCount() == 2) {
264 public void mousePressed(MouseEvent e) {
268 public void mouseReleased(MouseEvent e) {
273 * Selects the notes within the area that was selected.
275 public void mouseDragged(MouseEvent e) {
280 * Shows the menu if an OS-specific popup-trigger was activated.
282 private void maybeShowPopup(MouseEvent e) {
283 if (e.isPopupTrigger()) {
285 popup.show(e.getComponent(), e.getX(), e.getY());
290 * Grabs the focus when the mouse has entered.
292 public void mouseEntered(MouseEvent e) {
293 // Moosique.setActiveChannel(track.getChannel());
299 * Listens on actions on the popupmenu and executes the appropriate action.
301 class PopupListener implements ActionListener {
302 public void actionPerformed(ActionEvent e) {
303 Object source = e.getSource();
304 if (source == popupAdd) {
307 // new MooNote(int channel, int pitch, int velocity, long timestamp, int duration)