src/camidion/chordhelper/mididevice/SequencerMeasureView.java

   1 package camidion.chordhelper.mididevice;
   2
   3 import java.awt.Color;
   4
   5 import javax.sound.midi.Sequencer;
   6 import javax.swing.BoxLayout;
   7 import javax.swing.JLabel;
   8 import javax.swing.JPanel;
   9 import javax.swing.event.ChangeEvent;
  10 import javax.swing.event.ChangeListener;
  11
  12 import camidion.chordhelper.midieditor.SequenceTickIndex;
  13 import camidion.chordhelper.midieditor.SequenceTrackListTableModel;
  14
  15 /**
  16  * 小節表示ビュー
  17  */
  18 public class SequencerMeasureView extends JPanel {
  19         private MeasurePositionLabel measurePositionLabel;
  20         private MeasureLengthLabel measureLengthLabel;
  21         /**
  22          * シーケンサの現在の小節位置を表示するビューを構築します。
  23          * @param model スライダー用の時間範囲データモデル
  24          */
  25         public SequencerMeasureView(MidiSequencerModel model) {
  26                 setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
  27                 add(measurePositionLabel = new MeasurePositionLabel());
  28                 add(measureLengthLabel = new MeasureLengthLabel());
  29                 model.addChangeListener(new ChangeListener() {
  30                         @Override
  31                         public void stateChanged(ChangeEvent e) {
  32                                 Object source = e.getSource();
  33                                 if( ! (source instanceof MidiSequencerModel) ) return;
  34                                 MidiSequencerModel model = (MidiSequencerModel)source;
  35                                 Sequencer sequencer = model.getSequencer();
  36                                 SequenceTrackListTableModel sequenceTableModel = model.getSequenceTrackListTableModel();
  37                                 SequenceTickIndex tickIndex = (
  38                                         sequenceTableModel == null ? null : sequenceTableModel.getSequenceTickIndex()
  39                                 );
  40                                 if( ! sequencer.isRunning() || sequencer.isRecording() ) {
  41                                         // 停止中または録音中の場合、長さが変わることがあるので表示を更新
  42                                         if( tickIndex == null ) {
  43                                                 measureLengthLabel.setMeasure(0);
  44                                         }
  45                                         else {
  46                                                 long tickLength = sequencer.getTickLength();
  47                                                 int measureLength = tickIndex.tickToMeasure(tickLength);
  48                                                 measureLengthLabel.setMeasure(measureLength);
  49                                         }
  50                                 }
  51                                 // 小節位置の表示を更新
  52                                 if( tickIndex == null ) {
  53                                         measurePositionLabel.setMeasure(0, 0);
  54                                 }
  55                                 else {
  56                                         long tickPosition = sequencer.getTickPosition();
  57                                         int measurePosition = tickIndex.tickToMeasure(tickPosition);
  58                                         measurePositionLabel.setMeasure(measurePosition, tickIndex.lastBeat);
  59                                 }
  60                         }
  61                 });
  62         }
  63         private static abstract class MeasureLabel extends JLabel {
  64                 protected int measure = -1;
  65                 public boolean setMeasure(int measure) {
  66                         if( this.measure == measure ) return false;
  67                         this.measure = measure;
  68                         return true;
  69                 }
  70         }
  71         private static class MeasurePositionLabel extends MeasureLabel {
  72                 protected int beat = 0;
  73                 public MeasurePositionLabel() {
  74                         setFont( getFont().deriveFont(getFont().getSize2D() + 4) );
  75                         setForeground( new Color(0x80,0x00,0x00) );
  76                         setText("0001:01");
  77                         setToolTipText("Measure:beat position - 何小節目：何拍目");
  78                 }
  79                 public boolean setMeasure(int measure, int beat) {
  80                         if( ! super.setMeasure(measure) && this.beat == beat )
  81                                 return false;
  82                         setText(String.format("%04d:%02d", measure+1, beat+1));
  83                         return true;
  84                 }
  85         }
  86         private static class MeasureLengthLabel extends MeasureLabel {
  87                 public MeasureLengthLabel() {
  88                         setText("/0000");
  89                         setToolTipText("Measure length - 小節の数");
  90                 }
  91                 public boolean setMeasure(int measure) {
  92                         if( ! super.setMeasure(measure) )
  93                                 return false;
  94                         setText(String.format("/%04d", measure));
  95                         return true;
  96                 }
  97         }
  98 }