com.google.gwt.event.dom.client.KeyCodeEvent.java Source code

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Here is the source code for com.google.gwt.event.dom.client.KeyCodeEvent.java

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/*
 * Copyright 2008 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.gwt.event.dom.client;

import com.google.gwt.event.shared.EventHandler;

/**
 * Key up and key down are both events based upon a given key code.
 * 
 * @param <H> handler type
 */
public abstract class KeyCodeEvent<H extends EventHandler> extends KeyEvent<H> {
    /**
     * Does the key code represent an arrow key?
     * 
     * @param keyCode the key code
     * @return if it is an arrow key code
     */
    public static boolean isArrow(int keyCode) {
        switch (keyCode) {
        case KeyCodes.KEY_DOWN:
        case KeyCodes.KEY_RIGHT:
        case KeyCodes.KEY_UP:
        case KeyCodes.KEY_LEFT:
            return true;
        default:
            return false;
        }
    }

    /**
     * Gets the native key code. These key codes are enumerated in the
     * {@link KeyCodes} class.
     * 
     * @return the key code
     */
    public int getNativeKeyCode() {
        return getNativeEvent().getKeyCode();
    }

    /**
     * Is this a key down arrow?
     * 
     * @return whether this is a down arrow key event
     */
    public boolean isDownArrow() {
        return getNativeKeyCode() == KeyCodes.KEY_DOWN;
    }

    /**
     * Is this a left arrow?
     * 
     * @return whether this is a left arrow key event
     */
    public boolean isLeftArrow() {
        return getNativeKeyCode() == KeyCodes.KEY_LEFT;
    }

    /**
     * Is this a right arrow?
     * 
     * @return whether this is a right arrow key event
     */
    public boolean isRightArrow() {
        return getNativeKeyCode() == KeyCodes.KEY_RIGHT;
    }

    /**
     * Is this a up arrow?
     * 
     * @return whether this is a right arrow key event
     */
    public boolean isUpArrow() {
        return getNativeKeyCode() == KeyCodes.KEY_UP;
    }

    @Override
    public String toDebugString() {
        return super.toDebugString() + "[" + getNativeKeyCode() + "]";
    }
}