softkey.java

来自「j2me下的1套UI框架.包含j2me开发中会应用的各种低级组件」· Java 代码 · 共 48 行

package com.jmobilecore.ui.core;

import javax.microedition.lcdui.Font;

/**
 * This class represents either of the three soft keys, which are right below the
 * screen on the left, in center and right sides. Soft keys are pressed by the user to
 * perform actions, such as calculating a result.
 *
 * @author Greg Gridin
 */
abstract public class SoftKey {

    /**
     * The left soft key key code
     */
    public final static int LEFT = PlatformCanvas.KEY_SOFT_LEFT;

    /**
     * The center soft key key code
     */
    public final static int CENTER = PlatformCanvas.KEY_FIRE;

    /**
     * The right soft key key code
     */
    public final static int RIGHT = PlatformCanvas.KEY_SOFT_RIGHT;

    /**
     * The soft key label.
     */
    public String label;

    /**
     * Creates a new <code>SoftKey</code> instance.
     *
     * @param label String to display on the screen above the soft key.
     */
    public SoftKey(String label) {
        this.label = label;
    }

    /**
     * Performs an action.
     */
    abstract public void performAction();
} // class SoftKey