Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (c) 2002 and later by MH Software-Entwicklung. All Rights Reserved.
 *  
 * JTattoo is multiple licensed. If your are an open source developer you can use
 * it under the terms and conditions of the GNU General Public License version 2.0
 * or later as published by the Free Software Foundation.
 *  
 * see: gpl-2.0.txt
 * 
 * If you pay for a license you will become a registered user who could use the
 * software under the terms and conditions of the GNU Lesser General Public License
 * version 2.0 or later with classpath exception as published by the Free Software
 * Foundation.
 * 
 * see: lgpl-2.0.txt
 * see: classpath-exception.txt
 * 
 * Registered users could also use JTattoo under the terms and conditions of the 
 * Apache License, Version 2.0 as published by the Apache Software Foundation.
 *  
 * see: APACHE-LICENSE-2.0.txt
 */

import java.awt.*;
import java.lang.reflect.Method;
import javax.swing.*;

public class Main {
    private static Double javaVersion = null;

    public static boolean isActive(JComponent c) {
        if (c == null) {
            return false;
        }

        boolean active = true;
        if (c instanceof JInternalFrame) {
            active = ((JInternalFrame) c).isSelected();
        }
        if (active) {
            Container parent = c.getParent();
            while (parent != null) {
                if (parent instanceof JInternalFrame) {
                    active = ((JInternalFrame) parent).isSelected();
                    break;
                }
                parent = parent.getParent();
            }
        }
        if (active) {
            active = isFrameActive(c);
        }
        return active;
    }

    public static boolean isFrameActive(JComponent c) {
        if (c == null) {
            return false;
        }

        if (c.getTopLevelAncestor() instanceof Window) {
            return isWindowActive((Window) c.getTopLevelAncestor());
        }

        return true;
    }

    public static boolean isWindowActive(Window window) {
        if (getJavaVersion() >= 1.4) {
            try {
                Class paramTypes[] = null;
                Object args[] = null;
                Method m = window.getClass().getMethod("isActive", paramTypes);
                Boolean b = (Boolean) m.invoke(window, args);
                return b.booleanValue();
            } catch (Exception ex) {
            }
        }
        return true;
    }

    public static double getJavaVersion() {
        if (javaVersion == null) {
            try {
                String ver = System.getProperties().getProperty("java.version");
                String version = "";
                boolean firstPoint = true;
                for (int i = 0; i < ver.length(); i++) {
                    if (ver.charAt(i) == '.') {
                        if (firstPoint) {
                            version += ver.charAt(i);
                        }
                        firstPoint = false;
                    } else if (Character.isDigit(ver.charAt(i))) {
                        version += ver.charAt(i);
                    }
                }
                javaVersion = new Double(version);
            } catch (Exception ex) {
                javaVersion = new Double(1.3);
            }
        }
        return javaVersion.doubleValue();
    }
}