src/camidion/chordhelper/midieditor/SequencerSpeedSlider.java

   1 package camidion.chordhelper.midieditor;
   2
   3 import java.awt.Dimension;
   4 import java.awt.event.ActionEvent;
   5 import java.awt.event.ActionListener;
   6 import java.text.NumberFormat;
   7 import java.util.ArrayList;
   8 import java.util.Arrays;
   9 import java.util.Hashtable;
  10 import java.util.List;
  11
  12 import javax.swing.BoundedRangeModel;
  13 import javax.swing.BoxLayout;
  14 import javax.swing.JButton;
  15 import javax.swing.JComponent;
  16 import javax.swing.JLabel;
  17 import javax.swing.JPanel;
  18 import javax.swing.JSlider;
  19 import javax.swing.border.EtchedBorder;
  20
  21 import camidion.chordhelper.ChordHelperApplet;
  22
  23 /**
  24  * シーケンサーの再生スピード調整スライダビュー
  25  */
  26 public class SequencerSpeedSlider extends JPanel {
  27         private static int RESOLUTION = 1200;
  28         private static final List<String> maxFactors = Arrays.asList(
  29                         "x1", "x1.2", "x1.25", "x1.5", "x2", "x3", "x4", "x5", "x6",
  30                         "x8", "x12", "x16", "x24", "x32");
  31         public static float tempoFactorOf(int val) {
  32                 return (float) Math.pow( 2, ((double)val)/RESOLUTION );
  33         }
  34         private static final List<Hashtable<Integer,JComponent>>
  35                 tickLabeltables = new ArrayList<Hashtable<Integer,JComponent>>()
  36         {
  37                 {
  38                         NumberFormat formetter =  NumberFormat.getInstance();
  39                         for( String maxFactorString : maxFactors ) {
  40                                 Hashtable<Integer,JComponent> e = new Hashtable<>();
  41                                 Double maxFactor = Double.parseDouble(maxFactorString.substring(1));
  42                                 add(e);
  43                                 int maxValue = (int) Math.round(Math.log(maxFactor) / Math.log(2) * RESOLUTION);
  44                                 if( maxFactorString.equals("x1") ) {
  45                                         e.put(0, new JLabel("Play speed : x1 (Original)"));
  46                                 } else {
  47                                         e.put(-maxValue, new JLabel("x" + formetter.format(1/maxFactor)));
  48                                         e.put(0, new JLabel("x1"));
  49                                         e.put(maxValue, new JLabel(maxFactorString));
  50                                 }
  51                         }
  52                 }
  53         };
  54         private JSlider slider;
  55         private void changeSliderScale(String maxFactorString) {
  56                 int index = maxFactors.indexOf(maxFactorString);
  57                 slider.setLabelTable(tickLabeltables.get(index));
  58                 BoundedRangeModel sliderModel = slider.getModel();
  59                 Double maxFactor = Double.parseDouble(maxFactorString.substring(1));
  60                 int maxValue = (int) Math.round(Math.log(maxFactor) / Math.log(2) * RESOLUTION);
  61                 slider.setMajorTickSpacing((int) Math.round((double)maxValue / 2.0));
  62                 if( index > 0 ) {
  63                         sliderModel.setMinimum(-maxValue);
  64                         sliderModel.setMaximum(maxValue);
  65                         slider.setEnabled(true);
  66                 } else {
  67                         sliderModel.setMinimum(-1);
  68                         sliderModel.setValue(0);
  69                         sliderModel.setMaximum(1);
  70                         slider.setEnabled(false);
  71                 }
  72         }
  73         public SequencerSpeedSlider(BoundedRangeModel model) {
  74                 setBorder(new EtchedBorder());
  75                 setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
  76                 add(slider = new JSlider(model){
  77                         {
  78                                 setPaintTicks(true);
  79                                 setMajorTickSpacing(RESOLUTION/2);
  80                                 setPaintLabels(true);
  81                                 setLabelTable(tickLabeltables.get(0));
  82                                 setEnabled(false);
  83                         }
  84                 });
  85                 add(new JPanel() {
  86                         private int index = 0;
  87                         private JButton push, pull;
  88                         {
  89                                 setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
  90                                 add(pull = new JButton("=>|") {
  91                                         {
  92                                                 setSize(new Dimension(20,20));
  93                                                 setMargin(ChordHelperApplet.ZERO_INSETS);
  94                                                 addActionListener(new ActionListener() {
  95                                                         @Override
  96                                                         public void actionPerformed(ActionEvent e) {
  97                                                                 int max = maxFactors.size() - 1;
  98                                                                 if( index >= max ) return;
  99                                                                 changeSliderScale(maxFactors.get(++index));
 100                                                                 if( index >= max ) {
 101                                                                         setEnabled(false);
 102                                                                         push.requestFocusInWindow();
 103                                                                         return;
 104                                                                 }
 105                                                                 push.setEnabled(true);
 106                                                         }
 107                                                 });
 108                                         }
 109                                 });
 110                                 add(push = new JButton("<=|") {
 111                                         {
 112                                                 setSize(new Dimension(20,20));
 113                                                 setMargin(ChordHelperApplet.ZERO_INSETS);
 114                                                 setEnabled(false);
 115                                                 addActionListener(new ActionListener() {
 116                                                         @Override
 117                                                         public void actionPerformed(ActionEvent e) {
 118                                                                 if( index <= 0 ) return;
 119                                                                 changeSliderScale(maxFactors.get(--index));
 120                                                                 if( index <= 0 ) {
 121                                                                         setEnabled(false);
 122                                                                         pull.requestFocusInWindow();
 123                                                                         return;
 124                                                                 }
 125                                                                 pull.setEnabled(true);
 126                                                         }
 127                                                 });
 128                                         }
 129                                 });
 130                         }
 131                 });
 132         }
 133 }