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/*******************************************************************************
* Copyright (c) 2000, 2016 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
* Lars Vogel <Lars.Vogel@vogella.com> - Bug 507185
*******************************************************************************/
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 as keys
* are pressed on the system keyboard.
* <p>
* After creating an instance of a class that implements
* this interface it can be added to a control using the
* <code>addKeyListener</code> method and removed using
* the <code>removeKeyListener</code> method. When a
* key is pressed or released, the appropriate method will
* be invoked.
* </p>
*
* @see KeyAdapter
* @see KeyEvent
*/
public interface KeyListener extends SWTEventListener {
/**
* Sent when a key is pressed on the system keyboard.
*
* @param e an event containing information about the key press
*/
void keyPressed(KeyEvent e);
/**
* Sent when a key is released on the system keyboard.
*
* @param e an event containing information about the key release
*/
void keyReleased(KeyEvent e);
/**
* Static helper method to create a <code>KeyListener</code> for the
* {@link #keyPressed(KeyEvent e)}) method with a lambda expression.
*
* @param c the consumer of the event
* @return KeyListener
* @since 3.106
*/
static KeyListener keyPressedAdapter(Consumer<KeyEvent> c) {
return new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
c.accept(e);
}
};
}
/**
* Static helper method to create a <code>KeyListener</code> for the
* {@link #keyReleased(KeyEvent e)}) method with a lambda expression.
*
* @param c the consumer of the event
* @return KeyListener
* @since 3.106
*/
static KeyListener keyReleasedAdapter(Consumer<KeyEvent> c) {
return new KeyAdapter() {
@Override
public void keyReleased(KeyEvent e) {
c.accept(e);
}
};
}
}
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