1    import javax.swing.*;
2    import java.awt.*;
3    
4    public class MelodyPanel extends JPanel{
5    
6        private int length;
7        private Chord[] chords;
8        private boolean erase;
9        private Melody melody;
10   
11       public MelodyPanel(){
12           setLength(16);
13           setErase(true);
14       }
15   
16   
17       // Actual methods
18   
19       public void paintComponent(Graphics g){
20           super.paintComponent(g);
21           if(!getErase()){
22               drawRectangles(g, this.getWidth(), this.getHeight());
23           } else {
24               g.setColor(new Color(0,0,0,0));
25               g.fillRect(0,0, this.getWidth(), this.getHeight());
26           }
27       }
28   
29       private void drawRectangles(Graphics g, int width, int height){
30           int clear = (width/4)/(getLength()+1); // width of the space in between rectangles
31           int rect = (width*3/4)/getLength(); // width of each rectangle
32           // draw small rectangles and note names (if available) for every beat
33           for(int i = 1; i <= getLength(); i++){
34               g.setColor(Color.BLACK);
35               g.drawRoundRect(clear*i+rect*(i-1), height/3, rect, height/3, 10, 10);
36               if(getMelody().getMelody()[i-1] != null){
37                   if(getMelody().findKeyNoteIndex(getMelody().getMelody()[i-1]) != -1){ // note == keyNote
38                       g.setColor(Main.keyNoteColors[getMelody().findKeyNoteIndex(getMelody().getMelody()[i-1])]);
39                   } else { // note == extraNote
40                       g.setColor(Color.LIGHT_GRAY);
41                   }
42                   g.drawString(getMelody().getMelody()[i-1], (clear*i+rect*(i-1)+rect/2)-(g.getFontMetrics().stringWidth(getMelody().getMelody()[i-1])/2)+1, height/2+(g.getFontMetrics().getHeight()/4)); // place the note name at the center of the boxes
43               }
44           }
45           // draw large rectangles for every chord
46           int beginningIndex = 0;
47           Chord currentChord = getChords()[beginningIndex];
48           Chord compareChord;
49           int drawStartingXCoordinate;
50           int drawWidth;
51           for(int i = 0; i < getLength(); i++){
52               if(i < getLength()-1){
53                   compareChord = getChords()[i+1];
54               } else {
55                   compareChord = new Chord("#", false); // create a compareChord that will always be different from the currentChord -> needed to include the last beat
56               }
57               if(currentChord != null){
58                   if(!Chord.chordsEqual(currentChord, compareChord)){
59                       if(getMelody().findKeyNoteIndex(Melody.extractActualNoteName(currentChord.getRootNote())) != -1){ // rootNote == keyNote
60                           g.setColor(Main.keyNoteColors[getMelody().findKeyNoteIndex(Melody.extractActualNoteName(currentChord.getRootNote()))]);
61                       } else { // rootNote == extraNote
62                           g.setColor(Color.LIGHT_GRAY);
63                       }
64                       drawStartingXCoordinate = clear*(beginningIndex+1)+rect*(beginningIndex);
65                       drawWidth = clear*(i-beginningIndex)+rect*(i-beginningIndex+1);
66                       g.drawRoundRect(drawStartingXCoordinate, height*2/3+1, drawWidth, height/8, 10, 10);
67                       g.drawString(currentChord.getRootNote(), drawStartingXCoordinate+(drawWidth/2)-(g.getFontMetrics().stringWidth(currentChord.getRootNote())/2),height*2/3+1+(g.getFontMetrics().getHeight()*3/4));
68                       if(i < getLength()-1){
69                           beginningIndex = i+1;
70                           currentChord = getChords()[beginningIndex];
71                       }
72                   }
73               } else {
74                   if(compareChord != null){
75                       if(i < getLength()-1){
76                           beginningIndex = i+1;
77                           currentChord = getChords()[beginningIndex];
78                       }
79                   }
80               }
81           }
82       }
83   
84   
85       // Getters & Setters
86   
87       public int getLength(){
88           return this.length;
89       }
90   
91       public void setLength(int length){
92           this.length = length;
93           setChords(new Chord[getLength()]);
94           setMelody(new Melody(getLength()));
95       }
96   
97       public Chord[] getChords(){
98           return this.chords;
99       }
100  
101      public void setChords(Chord[] chords){
102          this.chords = chords;
103      }
104  
105      public boolean getErase(){
106          return this.erase;
107      }
108  
109      public void setErase(boolean erase){
110          this.erase = erase;
111      }
112  
113      public Melody getMelody(){
114          return this.melody;
115      }
116  
117      public void setMelody(Melody melody){
118          this.melody = melody;
119      }
120  }
121