This document discusses Griffon, a framework for building desktop applications on the Java Virtual Machine (JVM) using Groovy. It provides examples of creating a simple GUI with a text field and button using Java Swing and the same application using Griffon. Griffon allows building desktop applications in a more concise way using Groovy while offering features like MVC architecture, testing, packaging, plugins and support for multiple UI toolkits.

1. Griffon
Groovy-er desktop applications
© 2011 Eric Wendelin

2. Griffon
Building desktop apps for the JVM just
got Groovy

5. import java.awt.GridLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.SwingUtilities;
public class JavaFrame {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run() {
JFrame frame = buildUI();
}
frame.setVisible(true);
});
}
private static JFrame buildUI() {
JFrame frame = new Jframe("JavaFrame");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(new GridLayout(3,1));
final JTextField input = new JTextField(20);
final JTextField output = new JTextField(20);
output.setEditable(false); JButton button = new JButton("Click me!");
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event) {
output.setText(input.getText());
}
});
frame.getContentPane().add(input);
frame.getContentPane().add(button);
frame.getContentPane().add(output);
frame.pack();
return frame;
}
}

8. import groovy.swing.SwingBuilder
import static javax.swing.JFrame.EXIT_ON_CLOSE
new SwingBuilder().edt {
frame(title: "GroovyFrame", pack: true, visible: true,
defaultCloseOperation: EXIT_ON_CLOSE) {
gridLayout(cols: 1, rows: 3)
textField(id: "input", columns: 20)
button("Click me!", actionPerformed: {
output.text = input.text
})
textField(id: "output", columns: 20, editable: false)
}
}

10. Based on

11. Ow! Pointy!
Convention
>
Configuration

12. MVC
griffon create-mvc Login

13. @Bindable

14. BOOM! Built in!
griffon test-app

15. Lots of deployment
options
griffon package jar

16. application(title: ‘GroovyTitle’, pack: true) {
gridLayout(cols: 1, rows: 3)
textField(id: "input", columns: 20)
button("Click me!", actionPerformed: {
output.text = input.text
})
textField(id: "output", columns: 20, editable: false)
}

17. Plugins and Addons!
griffon install-plugin easyb

18. Polyglot
griffon install-plugin jython

19. Multi-UI Toolkit
Support

20. You should
probably buy me!

21. Thanks!
also go here
griffon.codehaus.org
@eriwen