/* * This program interprets melodic lines given in ABC notation as a * chromesthete might. * * A Pitch class will be defined, and will take center stage in the * processing. * * Interpreting a melody in ABC notation will amount to flashing * colored rectangles for prescribed durations, while sounding * the pitch! The color of the rectangle will correspond to pitch * class. The duration will correspond to the duration of the note. * * For this first version of the program, the duration will be held * constant at 1 beat. * * Three sorts of images will appear on the screen, the chromesthetic * output box, a text input box, and an error message box. Simplicity * of design is rendered by permitting only one box to be on the screen * at a time. * * ABC represents notes in a manner consistent with these examples: * C, D, E, C D E c d e * * Google ABC music representation if you would like to know more about it. */ package chromesthesia0; import painter.SPainter; import javax.swing.*; import java.util.Scanner; public class Chromesthesia { // INFRA FOR THE PROGRAM -- LAUNCHING A "GRAPHICS" THREAD. public static void main(String[] args) { SwingUtilities.invokeLater(new ThreadForGUI()); } private static class ThreadForGUI implements Runnable { @Override public void run() { new Chromesthesia(); } } //Why they do this for? public Chromesthesia(){ interpreter(); } //FEATURED VARIABLES private static SPainter miro; private static Pitch[] pitches; //THE INTERPRETER (METHOD CALL) public static void interpreter(){ initialization(); //... for the method miro and the method pitches // + to call a while loop while(true){ String input = getInput(); if (input.equalsIgnoreCase("Exit")){ break; } else{ try{ playMelody(input, pitches); } catch (Exception ex) { showErrorMessage(ex.toString()); } } } cleanup(); //... where the SPainter miro has to go. } // METHODS PERTAINING TO THE CHROMESTHETIC PITCHES private static Pitch[] establishPitches(SPainter painter){ Pitch[] pitches = new Pitch[9]; ///////////////////////////////////////////// Pitch pitchMiddleC = new Pitch("C", painter); pitches[0] = pitchMiddleC; Pitch pitchLowC = new Pitch("C,", painter); pitches[1] = pitchLowC; Pitch pitchHighC = new Pitch("c", painter); pitches[2] = pitchHighC; ///////////////////////////////////////////// Pitch pitchMiddleD = new Pitch("D", painter); pitches[3] = pitchMiddleD; Pitch pitchLowD = new Pitch("D,", painter); pitches[4] = pitchLowD; Pitch pitchHighD = new Pitch("d", painter); pitches[5] = pitchHighD; /////////////////////////////////////////// Pitch pitchMiddleE = new Pitch("E", painter); pitches[6] = pitchMiddleE; Pitch pitchLowE = new Pitch("E,", painter); pitches[7] = pitchLowE; Pitch pitchHighE = new Pitch("e", painter); pitches[8] = pitchHighE; /////////////////////////////////////////// return pitches; } private static Pitch find (String token, Pitch[] pitches) throws Exception { for (int i = 0; i < pitches.length; i = i+1){ Pitch pitch = pitches[i]; if (pitch.abcName().equals(token)){ return pitch; } } throw new Exception("### PITCH" + token + "NOT FOUND"); } private static void display(Pitch[] pitches){ for (int i = 0; i<pitches.length; i = i+1){ System.out.println(pitches[i].toString()); } } private static void playMelody(String input, Pitch[] pitches) throws Exception{ Scanner scanner = new Scanner(input); while(scanner.hasNext()){ String token = scanner.next(); Pitch pitch = find(token,pitches); // Q: How is it possible that one variable get defined twice in a program? pitch.play("1"); } } // METHOD DEFINITIONS: INITIALIZATION, CLEANUP, GETTING 'INPUT', ERROR MESSAGING //Q: Why the class and data type is switched? static private void showErrorMessage(String message){ miro.setVisible(false); JOptionPane.showMessageDialog(null,message); } private static void initialization(){ //ESTABLISH THE PAINTER AND GIVE IT A SUBSTANTIAL BRUSH WIDTH miro = new SPainter("Chromesthesia", 500, 500); miro.setVisible(false); miro.setBrushWidth(7); //ESTABLISH THE CHROMESTITIC PITCH CLASS OBJECTS pitches = establishPitches(miro); display(pitches); } private static String getInput(){ miro.setVisible(false); String label = "Please enter a melody in ABC notation, or EXIT ..."; String input = JOptionPane.showInputDialog(null, label); // how is it possible that the String variable input can get defined twice in one program? miro.setVisible(true); if( input == null){ input = ""; } return input; //Any return is definitely needed bc. the String variable input has been defined above in a way of methods } static private void cleanup(){ System.exit(0); } }