src/camidion/chordhelper/midieditor/TempoSelecter.java

   1 package camidion.chordhelper.midieditor;\r
   2 \r
   3 import java.awt.Component;\r
   4 import java.awt.event.MouseEvent;\r
   5 import java.awt.event.MouseListener;\r
   6 \r
   7 import javax.sound.midi.MetaEventListener;\r
   8 import javax.sound.midi.MetaMessage;\r
   9 import javax.swing.Box;\r
  10 import javax.swing.BoxLayout;\r
  11 import javax.swing.JLabel;\r
  12 import javax.swing.JPanel;\r
  13 import javax.swing.JSpinner;\r
  14 import javax.swing.SpinnerNumberModel;\r
  15 import javax.swing.SwingUtilities;\r
  16 \r
  17 import camidion.chordhelper.ButtonIcon;\r
  18 import camidion.chordhelper.music.MIDISpec;\r
  19 \r
  20 /**\r
  21  * テンポ選択（QPM: Quarter Per Minute）\r
  22  */\r
  23 public class TempoSelecter extends JPanel implements MouseListener, MetaEventListener {\r
  24         static final int DEFAULT_QPM = 120;\r
  25         protected SpinnerNumberModel tempoSpinnerModel =\r
  26                 new SpinnerNumberModel(DEFAULT_QPM, 1, 999, 1);\r
  27         private JLabel tempoLabel = new JLabel(\r
  28                 "=", new ButtonIcon(ButtonIcon.QUARTER_NOTE_ICON), JLabel.CENTER\r
  29         ) {{\r
  30                 setVerticalAlignment(JLabel.CENTER);\r
  31         }};\r
  32         private JLabel tempoValueLabel = new JLabel(""+DEFAULT_QPM);\r
  33         private JSpinner tempoSpinner = new JSpinner(tempoSpinnerModel);\r
  34         public TempoSelecter() {\r
  35                 String tooltip = "Tempo in quatrers per minute - テンポ（１分あたりの四分音符の数）";\r
  36                 tempoSpinner.setToolTipText(tooltip);\r
  37                 tempoValueLabel.setToolTipText(tooltip);\r
  38                 setLayout(new BoxLayout(this,BoxLayout.X_AXIS));\r
  39                 add(tempoLabel);\r
  40                 add(Box.createHorizontalStrut(5));\r
  41                 add(tempoSpinner);\r
  42                 add(tempoValueLabel);\r
  43                 setEditable(true);\r
  44                 tempoLabel.addMouseListener(this);\r
  45         }\r
  46         private long prevBeatMicrosecondPosition = 0;\r
  47         private class SetTempoRunnable implements Runnable {\r
  48                 byte[] qpm;\r
  49                 public SetTempoRunnable(byte[] qpm) { this.qpm = qpm; }\r
  50                 @Override\r
  51                 public void run() { setTempo(qpm);}\r
  52         }\r
  53         @Override\r
  54         public void meta(MetaMessage msg) {\r
  55                 switch(msg.getType()) {\r
  56                 case 0x51: // Tempo (3 bytes) - テンポ\r
  57                         if( ! SwingUtilities.isEventDispatchThread() ) {\r
  58                                 SwingUtilities.invokeLater(new SetTempoRunnable(msg.getData()));\r
  59                                 break;\r
  60                         }\r
  61                         setTempo(msg.getData());\r
  62                         break;\r
  63                 }\r
  64         }\r
  65         @Override\r
  66         public void mousePressed(MouseEvent e) {\r
  67                 Component obj = e.getComponent();\r
  68                 if(obj == tempoLabel && isEditable()) {\r
  69                         //\r
  70                         // Adjust tempo by interval time between two clicks\r
  71                         //\r
  72                         long currentMicrosecond = System.nanoTime()/1000;\r
  73                         // midi_ch_selecter.noteOn( 9, 37, 100 );\r
  74                         long interval_us = currentMicrosecond - prevBeatMicrosecondPosition;\r
  75                         prevBeatMicrosecondPosition = currentMicrosecond;\r
  76                         if( interval_us < 2000000L /* Shorter than 2 sec only */ ) {\r
  77                                 int tempo_in_bpm = (int)(240000000L / interval_us) >> 2; //  n/4拍子の場合のみを想定\r
  78                         int old_tempo_in_bpm = getTempoInQpm();\r
  79                         setTempo( ( tempo_in_bpm + old_tempo_in_bpm * 2 ) / 3 );\r
  80                         }\r
  81                 }\r
  82         }\r
  83         public void mouseReleased(MouseEvent e) { }\r
  84         public void mouseEntered(MouseEvent e) { }\r
  85         public void mouseExited(MouseEvent e) { }\r
  86         public void mouseClicked(MouseEvent e) { }\r
  87         private boolean editable;\r
  88         /**\r
  89          * 編集可能かどうかを返します。\r
  90          * @return 編集可能ならtrue\r
  91          */\r
  92         public boolean isEditable() { return editable; }\r
  93         /**\r
  94          * 編集可能かどうかを設定します。\r
  95          * @param editable 編集可能ならtrue\r
  96          */\r
  97         public void setEditable( boolean editable ) {\r
  98                 this.editable = editable;\r
  99                 tempoSpinner.setVisible( editable );\r
 100                 tempoValueLabel.setVisible( !editable );\r
 101                 if( !editable ) {\r
 102                         // Copy spinner's value to label\r
 103                         tempoValueLabel.setText(\r
 104                                 ""+tempoSpinnerModel.getNumber().intValue()\r
 105                         );\r
 106                 }\r
 107                 tempoLabel.setToolTipText(\r
 108                         editable ?\r
 109                         "Click rhythmically to adjust tempo - ここをクリックしてリズムをとるとテンポを合わせられます"\r
 110                         : null\r
 111                 );\r
 112         }\r
 113         /**\r
 114          * テンポを返します。\r
 115          * @return テンポ [BPM](QPM)\r
 116          */\r
 117         public int getTempoInQpm() {\r
 118                 return tempoSpinnerModel.getNumber().intValue();\r
 119         }\r
 120         /**\r
 121          * テンポをMIDIメタメッセージのバイト列として返します。\r
 122          * @return MIDIメタメッセージのバイト列\r
 123          */\r
 124         public byte[] getTempoByteArray() {\r
 125                 return MIDISpec.qpmTempoToByteArray(getTempoInQpm());\r
 126         }\r
 127         /**\r
 128          * テンポを設定します。\r
 129          * @param qpm BPM(QPM)の値\r
 130          */\r
 131         public void setTempo(int qpm) {\r
 132                 tempoSpinnerModel.setValue(new Integer(qpm));\r
 133                 tempoValueLabel.setText(""+qpm);\r
 134         }\r
 135         /**\r
 136          * MIDIメタメッセージのバイト列からテンポを設定します。\r
 137          * @param msgdata MIDIメタメッセージのバイト列（null を指定した場合はデフォルトに戻る）\r
 138          */\r
 139         public void setTempo(byte msgdata[]) {\r
 140                 setTempo(msgdata==null ? DEFAULT_QPM: MIDISpec.byteArrayToQpmTempo(msgdata));\r
 141         }\r
 142 }