JFugue 13. Saving and Loading Pattern

We can save a pattern to a text file or read a pattern from a text file.

The file JFugue13.staccato is saved to the Project folder. If you open it, it will have the comment indicated below.

Because it is a text file it is easy to view and modify in text editor. Further it is possible to use another language such as Python to create the text file.

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package jfugue13;

import java.io.File;
import java.io.IOException;
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextArea;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.stage.Stage;
import org.jfugue.pattern.Pattern;
import org.jfugue.player.Player;

public class JFugue13 extends Application {
    
    public static void main(String[] args) {
        launch(args);
    }
    
    TextArea text;
    Button button;
    
    @Override
    public void start(Stage primaryStage) throws Exception {
        
        button = new Button("Save and Load\n   Pattern");
        button.setOnAction(e->example());
        button.setPrefWidth(250);
        button.setFont(Font.font("Verdana", 20));
        
        VBox examples = new VBox(10, button);
        examples.setPadding(new Insets(10));
        
        text = new TextArea();
        text.setPrefRowCount(20);
        text.setPrefColumnCount(32);
        text.setFont(Font.font("Verdana", 20));
        text.setEditable(false);
        text.setWrapText(true);
        
        HBox root = new HBox(50,examples,text);
        
        Scene scene = new Scene(root, 900, 600);
        primaryStage.setTitle("JFugue 13. Saving and Loading Pattern");
        
        primaryStage.setScene(scene);
        primaryStage.show();
    }
    
    private void example() {
        
        Player player = new Player();
        String patt = "C5q Rq D5q Rq E5h Rq C4h";
        Pattern pattern1 = new Pattern(patt);
        try {
            pattern1.save(new File("JFugue13.staccato"), "Test pattern");
        } catch (IOException ex) {
        }
        
        text.setText("\nSaved Pattern:\n\n" + pattern1);
        
        Pattern pattern2 = null;
        try {
            pattern2 = Pattern.load(new File("JFugue13.staccato"));
        } catch (IOException ex) {
        }
        
        text.appendText("\n\nLoaded Pattern:\n\n" + pattern2);
        
        Pattern pattern = new Pattern();
        pattern.add(pattern1.setVoice(0));
        pattern.add(pattern2.setVoice(1).setInstrument("TRUMPET"));
        text.appendText("\n\nCombined Pattern:\n\n" + pattern);
        
        player.play(pattern);
    }
}

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This is the output. The loaded file, containing same notes, as the saved one, is played as Trumpet alongside the default Piano.

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