java-swing-action-listener.ci

import JButton from "javax.swing.JButton";
import JFrame from "javax.swing.JFrame";


Handler = class{
	
	/**
	* Need to pass 'e' by reference because (APPARENTLY) eventSource 
	* is trainsient in event. Nonetheless, deep-copying event object
	* with ser/deser leads to losing eventSource.
	*/
	handle = \ref e->{
		e.getSource().setText("capra");		
	}

}


f = JFrame();
b = JButton("ciao");
handler = Handler();
b.addActionListener( handler.handle  );
f.add(b);
f.setSize(200, 200);
f.show();


c1 = b.getText() == 'ciao';
b.doClick(); // simulate click
c2 = b.getText() == 'capra';
f.dispose();
c1 && c2;