bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/events/ControlListener.java

/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.events;


import java.util.function.*;

import org.eclipse.swt.internal.*;

/**
 * Classes which implement this interface provide methods
 * that deal with the events that are generated by moving
 * and resizing controls.
 * <p>
 * After creating an instance of a class that implements
 * this interface it can be added to a control using the
 * <code>addControlListener</code> method and removed using
 * the <code>removeControlListener</code> method. When a
 * control is moved or resized, the appropriate method will
 * be invoked.
 * </p>
 *
 * @see ControlAdapter
 * @see ControlEvent
 */
public interface ControlListener extends SWTEventListener {

/**
 * Sent when the location (x, y) of a control changes relative
 * to its parent (or relative to the display, for <code>Shell</code>s).
 *
 * @param e an event containing information about the move
 */
void controlMoved(ControlEvent e);

/**
 * Sent when the size (width, height) of a control changes.
 *
 * @param e an event containing information about the resize
 */
void controlResized(ControlEvent e);

/**
 * Static helper method to create a <code>ControlListener</code> for the
 * {@link #controlMoved(ControlEvent e)}) method, given a lambda expression or a method reference.
 *
 * @param c the consumer of the event
 * @return ControlListener
 * @since 3.107
 */
static ControlListener controlMovedAdapter(Consumer<ControlEvent> c) {
	return new ControlAdapter() {
		@Override
		public void controlMoved(ControlEvent e) {
			c.accept(e);
		}
	};
}

/**
 * Static helper method to create a <code>ControlListener</code> for the
 * {@link #controlResized(ControlEvent e)}) method, given a lambda expression or a method reference.
 *
 * @param c the consumer of the event
 * @return ControlListener
 * @since 3.107
 */
static ControlListener controlResizedAdapter(Consumer<ControlEvent> c) {
	return new ControlAdapter() {
		@Override
		public void controlResized(ControlEvent e) {
			c.accept(e);
		}
	};
}
}