MooView.java

   1 import javax.sound.midi.*;
   2 import javax.swing.*;
   3 import java.awt.*;
   4 import java.awt.event.*;
   5
   6 /**
   7  * The main view, the container of the track views.
   8  *
   9  * @author  Einar Pehrson
  10  */
  11
  12 public class MooView extends JScrollPane {
  13
  14         private JPanel trackPanel;
  15         private int numberOfTracks;
  16
  17         /**
  18          * Creates the main view
  19          */
  20         public MooView(Track[] tracks) {
  21                 super(VERTICAL_SCROLLBAR_ALWAYS, HORIZONTAL_SCROLLBAR_AS_NEEDED);
  22                 numberOfTracks = tracks.length;
  23                 trackPanel = new JPanel(new GridLayout(1,3), true);
  24                 setTracks(tracks);
  25                 setViewportView(trackPanel);
  26         }
  27
  28         /**
  29          * Fills the track panel with track views for all tracks in the current sequence.
  30          * @param tracks        the tracks for which to add views
  31          */
  32         public void setTracks(Track[] tracks) {
  33                 if (tracks.length == 1) {
  34                         // If MIDI file is of type 0, creates a view for the track.
  35                         trackPanel.add(new MooTrackView(tracks[0]));
  36                 } else {
  37                         // Creates dialog for progress bar.
  38                         JDialog progressDialog = new JDialog(Moosique.getGUI(), "Visualizing MIDI file...", false);
  39                         JProgressBar progressBar = new JProgressBar(0, tracks.length);
  40                         progressBar.setValue(0);
  41                         progressBar.setStringPainted(true);
  42                         progressDialog.getContentPane().add(progressBar);
  43                         progressDialog.pack();
  44                         progressDialog.setLocation((Toolkit.getDefaultToolkit().getScreenSize().width - progressDialog.getWidth()) / 2, (Toolkit.getDefaultToolkit().getScreenSize().height - progressDialog.getHeight()) / 2);
  45                         progressDialog.setVisible(true);
  46
  47                         // Starts filling the track panel with track views, while updating the progress bar.
  48                         trackPanel.removeAll();
  49                         trackPanel.setLayout(new GridLayout(1,tracks.length));
  50                         for (int i = 1; i < tracks.length; i++) {
  51                                 trackPanel.add(new MooTrackView(tracks[i]));
  52                                 progressBar.setValue(i+1);
  53                         }
  54                         progressDialog.dispose();
  55                 }
  56                 trackPanel.validate();
  57         }
  58
  59         /**
  60          * Calls on each track view to update itself.
  61          */
  62         public void update() {
  63                 Component[] comps = getComponents();
  64                 for (int i = 0; i < comps.length; i++) {
  65                         if(comps[i] instanceof MooTrackView) ((MooTrackView)comps[i]).update();
  66                 }
  67         }
  68
  69         /**
  70          * Creates a view for the given track and adds it to the main view.
  71          * @param track         the track for which to add a view
  72          * @param index         the index at which to insert the view
  73          */
  74         public void addTrackView(Track track, int index) {
  75                 ((GridLayout)trackPanel.getLayout()).setColumns(++numberOfTracks);
  76                 trackPanel.add(new MooTrackView(track), index);
  77                 validate();
  78         }
  79
  80         /**
  81          * Removes the view for the given track.
  82          * @param index         the index of the track for which to remove the view
  83          */
  84         public void removeTrackView(int index) {
  85                 remove(index);
  86                 ((GridLayout)trackPanel.getLayout()).setColumns(--numberOfTracks);
  87                 validate();
  88         }
  89 }