/*
 * Copyright 2001-2006 Geert Bevin <gbevin[remove] at uwyn dot com>
 * Distributed under the terms of either:
 * - the common development and distribution license (CDDL), v1.0; or
 * - the GNU Lesser General Public License, v2.1 or later
 * $Id: Counter.java 3364 2006-07-10 10:33:29Z gbevin $
 */
import com.uwyn.rife.engine.Element;
import com.uwyn.rife.engine.annotations.Datalink;
import com.uwyn.rife.engine.annotations.Elem;
import com.uwyn.rife.engine.annotations.InputProperty;
import com.uwyn.rife.engine.annotations.OutputProperty;
import com.uwyn.rife.engine.annotations.SubmissionHandler;
import com.uwyn.rife.template.Template;

@Elem(
// Setting an empty URL, makes the submissions target the element that embeds
// the embedded Counter elements. Without this declaration, each embedded
// element would become the main element after the submission (since it has
// its own URL).
url="",
// This data link connects the 'counter' output to the 'counter' value. The
// element might have changed the counter property value in the meantime
// (after an 'increase' or 'decrease' submission). The reflective datalink
// will pass the output value to the input at the next submission.
datalinks = {@Datalink(srcOutput="counter", destInput="counter", destClass=Counter.class)}
)
public class Counter extends Element {
	private int counter;
	@InputProperty	public void setCounter(int counter) { this.counter = counter; }
	@OutputProperty	public int getCounter() { return counter; }
	
	@SubmissionHandler
	public void doDecrease() {
		counter--;
		processElement();
	}
	
	@SubmissionHandler
	public void doIncrease() {
		counter++;
		processElement();
	}
	
	public void processElement() {
		Template t = getHtmlTemplate("counter");
		t.setValue("counter", counter);
		print(t);
	}
}