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 implements ChangeListener {
  19         private SequencerMeasureView.MeasurePositionLabel measurePositionLabel;
  20         private SequencerMeasureView.MeasureLengthLabel measureLengthLabel;
  21         private MidiSequencerModel model;
  22         /**
  23          * 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。
  24          * @param model スライダー用の時間範囲データモデル
  25          */
  26         public SequencerMeasureView(MidiSequencerModel model) {
  27                 setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
  28                 add(measurePositionLabel = new MeasurePositionLabel());
  29                 add(measureLengthLabel = new MeasureLengthLabel());
  30                 (this.model = model).addChangeListener(this);
  31         }
  32         @Override
  33         public void stateChanged(ChangeEvent e) {
  34                 Sequencer sequencer = model.getSequencer();
  35                 SequenceTrackListTableModel sequenceTableModel = model.getSequenceTrackListTableModel();
  36                 SequenceTickIndex tickIndex = (
  37                         sequenceTableModel == null ? null : sequenceTableModel.getSequenceTickIndex()
  38                 );
  39                 if( ! sequencer.isRunning() || sequencer.isRecording() ) {
  40                         // 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
  41                         if( tickIndex == null ) {
  42                                 measureLengthLabel.setMeasure(0);
  43                         }
  44                         else {
  45                                 long tickLength = sequencer.getTickLength();
  46                                 int measureLength = tickIndex.tickToMeasure(tickLength);
  47                                 measureLengthLabel.setMeasure(measureLength);
  48                         }
  49                 }
  50                 // 小節位置の表示を更新
  51                 if( tickIndex == null ) {
  52                         measurePositionLabel.setMeasure(0, 0);
  53                 }
  54                 else {
  55                         long tickPosition = sequencer.getTickPosition();
  56                         int measurePosition = tickIndex.tickToMeasure(tickPosition);
  57                         measurePositionLabel.setMeasure(measurePosition, tickIndex.lastBeat);
  58                 }
  59         }
  60         private static abstract class MeasureLabel extends JLabel {
  61                 protected int measure = -1;
  62                 public boolean setMeasure(int measure) {
  63                         if( this.measure == measure ) return false;
  64                         this.measure = measure;
  65                         return true;
  66                 }
  67         }
  68         private static class MeasurePositionLabel extends SequencerMeasureView.MeasureLabel {
  69                 protected int beat = 0;
  70                 public MeasurePositionLabel() {
  71                         setFont( getFont().deriveFont(getFont().getSize2D() + 4) );
  72                         setForeground( new Color(0x80,0x00,0x00) );
  73                         setText("0001:01");
  74                         setToolTipText("Measure:beat position - 何小節目：何拍目");
  75                 }
  76                 public boolean setMeasure(int measure, int beat) {
  77                         if( ! super.setMeasure(measure) && this.beat == beat )
  78                                 return false;
  79                         setText(String.format("%04d:%02d", measure+1, beat+1));
  80                         return true;
  81                 }
  82         }
  83         private static class MeasureLengthLabel extends SequencerMeasureView.MeasureLabel {
  84                 public MeasureLengthLabel() {
  85                         setText("/0000");
  86                         setToolTipText("Measure length - 小節の数");
  87                 }
  88                 public boolean setMeasure(int measure) {
  89                         if( ! super.setMeasure(measure) )
  90                                 return false;
  91                         setText(String.format("/%04d", measure));
  92                         return true;
  93                 }
  94         }
  95 }