Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2010 BSI Business Systems Integration AG.
 * 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:
 *     BSI Business Systems Integration AG - initial API and implementation
 ******************************************************************************/

import java.awt.Dialog;

import java.awt.Frame;

import java.awt.KeyboardFocusManager;

import java.awt.Window;

import java.util.TreeMap;

public class Main {
    public static Window getOwnerForChildWindow() {
        Window w = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusedWindow();
        if (w != null) {
            return w;
        }
        w = KeyboardFocusManager.getCurrentKeyboardFocusManager().getActiveWindow();
        if (w != null) {
            return w;
        }
        /*
         * Priority level1
         * modal dialog: +200
         * non-modal dialog: +100
         * frame: +0
         *
         * Priority level2
         * no owned windows: +10
         */
        TreeMap<Integer, Window> prioMap = new TreeMap<Integer, Window>();
        for (Window cand : Window.getWindows()) {
            if (cand == null) {
                continue;
            }
            if (!cand.isVisible()) {
                continue;
            }
            if (!cand.isShowing()) {
                continue;
            }
            int prio = 0;
            Window[] children = cand.getOwnedWindows();
            if (children == null || children.length == 0) {
                prio += 10;
            }
            if (cand instanceof Dialog) {
                Dialog dlg = (Dialog) cand;
                if (dlg.isModal()) {
                    prio += 200;
                } else {
                    prio += 100;
                }
                prioMap.put(prio, cand);
            } else if (cand instanceof Frame) {
                if (!prioMap.containsKey(prio)) {
                    prioMap.put(prio, cand);
                }
            }
        }
        if (prioMap.size() > 0) {
            return prioMap.get(prioMap.lastKey());
        }
        //last line of defense
        if (prioMap.size() == 0) {
            for (Window cand : Window.getWindows()) {
                if (cand == null) {
                    continue;
                }
                if (cand.isVisible()) {
                    return cand;
                }
            }
        }
        return null;
    }
}