src/camidion/chordhelper/midieditor/SequencerSpeedSlider.java

   1 package camidion.chordhelper.midieditor;
   2
   3 import java.util.ArrayList;
   4 import java.util.Hashtable;
   5 import java.util.List;
   6
   7 import javax.swing.AbstractSpinnerModel;
   8 import javax.swing.BoundedRangeModel;
   9 import javax.swing.BoxLayout;
  10 import javax.swing.JComponent;
  11 import javax.swing.JLabel;
  12 import javax.swing.JPanel;
  13 import javax.swing.JSlider;
  14 import javax.swing.JSpinner;
  15 import javax.swing.event.ChangeEvent;
  16 import javax.swing.event.ChangeListener;
  17
  18 /**
  19  * シーケンサーの再生スピード調整スライダビュー
  20  */
  21 public class SequencerSpeedSlider extends JPanel {
  22         public static float tempoFactorOf(int val) {
  23                 return (float) Math.pow( 2, ((double)val)/12.0 );
  24         }
  25         private static final List<Hashtable<Integer,JComponent>> labeltables = new ArrayList<Hashtable<Integer,JComponent>>() {{
  26                 for( int i = 0; i < 5; i++ ) {
  27                         Hashtable<Integer,JComponent> e = new Hashtable<>();
  28                         add(e);
  29                         e.put(-i * 12, new JLabel( "x" + Double.toString(Math.pow( 2, (double)(-i) )) ));
  30                         e.put(0, new JLabel( "x1.0" ));
  31                         e.put(i * 12, new JLabel( "x" + Double.toString(Math.pow( 2, (double)i )) ));
  32                 }
  33         }};
  34         private JLabel titleLabel;
  35         private JSlider slider;
  36         public SequencerSpeedSlider(BoundedRangeModel model) {
  37                 setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
  38                 add(titleLabel = new JLabel("Speed: "));
  39                 add(slider = new JSlider(model){{
  40                         setPaintTicks(true);
  41                         setMajorTickSpacing(12);
  42                         setMinorTickSpacing(1);
  43                         setPaintLabels(true);
  44                         setVisible(false);
  45                 }});
  46                 add(new JLabel("x"));
  47                 add(new JSpinner(new AbstractSpinnerModel() {
  48                         private int index = 0;
  49                         @Override
  50                         public Object getValue() { return Math.pow( 2, (double)index ); }
  51                         @Override
  52                         public void setValue(Object value) {
  53                                 index =  (int) Math.round( Math.log((Double)value) / Math.log(2) );
  54                                 fireStateChanged();
  55                         }
  56                         @Override
  57                         public Object getNextValue() {
  58                                 return index >= 4 ? null : Math.pow( 2, (double)(++index) );
  59                         }
  60                         @Override
  61                         public Object getPreviousValue() {
  62                                 return index <= 0 ? null : Math.pow( 2, (double)(--index) );
  63                         }
  64                 }) {{
  65                         addChangeListener(new ChangeListener() {
  66                                 @Override
  67                                 public void stateChanged(ChangeEvent e) {
  68                                         int index = (int) Math.round( Math.log((Double)getValue()) / Math.log(2) );
  69                                         BoundedRangeModel model = slider.getModel();
  70                                         if( index == 0 ) {
  71                                                 model.setValue(0);
  72                                                 slider.setVisible(false);
  73                                                 titleLabel.setVisible(true);
  74                                                 return;
  75                                         }
  76                                         int maxValue = index * 12;
  77                                         model.setMinimum(-maxValue);
  78                                         model.setMaximum(maxValue);
  79                                         slider.setMajorTickSpacing(12);
  80                                         slider.setMinorTickSpacing(index > 2 ? 12 : 1);
  81                                         slider.setLabelTable(labeltables.get(index));
  82                                         slider.setVisible(true);
  83                                         titleLabel.setVisible(false);
  84                                 }
  85                         });
  86                 }});
  87         }
  88 }