awt/java/awt/event/HierarchyEvent.java

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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.
 */
/**
 * @author Michael Danilov
 * @version $Revision$
 */
package java.awt.event;

import java.awt.AWTEvent;
import java.awt.Component;
//???AWT: import java.awt.Container;

/**
 * This class is not supported in Android 1.0. It is merely provided to maintain
 * interface compatibility with desktop Java implementations.
 * 
 * @since Android 1.0
 */
public class HierarchyEvent extends AWTEvent {

    private static final long serialVersionUID = -5337576970038043990L;

    public static final int HIERARCHY_FIRST = 1400;

    public static final int HIERARCHY_CHANGED = 1400;

    public static final int ANCESTOR_MOVED = 1401;

    public static final int ANCESTOR_RESIZED = 1402;

    public static final int HIERARCHY_LAST = 1402;

    public static final int PARENT_CHANGED = 1;

    public static final int DISPLAYABILITY_CHANGED = 2;

    public static final int SHOWING_CHANGED = 4;

    //???AWT: private Container changedParent;
    private Component changed;
    private long changeFlag;

    //???AWT
    /*
    public HierarchyEvent(Component source, int id, Component changed, 
                          Container changedParent) {
        this(source, id, changed, changedParent, 0l);
    }
    */

    //???AWT
    /*
    public HierarchyEvent(Component source, int id, Component changed,
            Container changedParent, long changeFlags) {
        super(source, id);

        this.changed = changed;
        this.changedParent = changedParent;
        this.changeFlag = changeFlags;
    }
    */
    //???AWT: Fake constructor, should be as above.
    public HierarchyEvent(Component source, int id, Component changed,
            Object changedParent, long changeFlags) {
        super(source, id);

//        this.changed = changed;
//        this.changedParent = changedParent;
//        this.changeFlag = changeFlags;
    }
    
    public Component getComponent() {
        return (Component) source;
    }

    public long getChangeFlags() {
        return changeFlag;
    }

    public Component getChanged() {
        return changed;
    }

    //???AWT
    /*
    public Container getChangedParent() {
        return changedParent;

    }
    */

    @Override
    public String paramString() {
        /* The format is based on 1.5 release behavior 
         * which can be revealed by the following code:
         * 
         * HierarchyEvent e = new HierarchyEvent(new Button("Button"),
         *          HierarchyEvent.HIERARCHY_CHANGED,
         *          new Panel(), new Container());
         * System.out.println(e);
         */
        String paramString = null;

        switch (id) {
        case HIERARCHY_CHANGED:
            paramString = "HIERARCHY_CHANGED"; //$NON-NLS-1$
            break;
        case ANCESTOR_MOVED:
            paramString = "ANCESTOR_MOVED"; //$NON-NLS-1$
            break;
        case ANCESTOR_RESIZED:
            paramString = "ANCESTOR_RESIZED"; //$NON-NLS-1$
            break;
        default:
            paramString = "unknown type"; //$NON-NLS-1$
        }

        paramString += " ("; //$NON-NLS-1$

        if (id == HIERARCHY_CHANGED) {
            if ((changeFlag & PARENT_CHANGED) > 0) {
                paramString += "PARENT_CHANGED,"; //$NON-NLS-1$
            }
            if ((changeFlag & DISPLAYABILITY_CHANGED) > 0) {
                paramString += "DISPLAYABILITY_CHANGED,"; //$NON-NLS-1$
            }
            if ((changeFlag & SHOWING_CHANGED) > 0) {
                paramString += "SHOWING_CHANGED,"; //$NON-NLS-1$
            }
        }

        //???AWT
        /*
        return paramString + "changed=" + changed +  //$NON-NLS-1$
                ",changedParent=" + changedParent + ")"; //$NON-NLS-1$ //$NON-NLS-2$
        */
        return paramString;
    }

}