Java tutorial
//package com.java2s; /* * OpenBench LogicSniffer / SUMP project * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA 02110, USA * * * Copyright (C) 2010-2011 - J.W. Janssen, http://www.lxtreme.nl */ import java.awt.*; import javax.swing.*; public class Main { /** * Tries to find the owning window for the AWT-event's source. * * @param aEvent * the AWT event to find the owning window for, may be * <code>null</code>. * @return the owning window, or <code>null</code> if no such window could be * found, or a <code>null</code> event was given. */ public static final Window getOwningWindow(final AWTEvent aEvent) { Window owner = null; if (aEvent != null) { final Object source = aEvent.getSource(); if (source instanceof Component) { owner = getOwningWindow((Component) source); } } return owner; } /** * Tries to find the owning window for the given component. * * @param aComponent * the AWT event to find the owning window for, may be * <code>null</code>. * @return the owning window, or <code>null</code> if no such window could be * found, or a <code>null</code> component was given. */ public static final Window getOwningWindow(final Component aComponent) { if (aComponent == null) { return null; } Window owner = SwingUtilities.getWindowAncestor(aComponent); if (owner == null) { owner = getCurrentWindow(); } return owner; } /** * Tries to find the current focused window. * * @return the current focused window, or <code>null</code> if no such window * could be found. */ public static final Window getCurrentWindow() { Window owner; final KeyboardFocusManager kbdFocusManager = KeyboardFocusManager.getCurrentKeyboardFocusManager(); owner = kbdFocusManager.getFocusedWindow(); if (owner == null) { owner = kbdFocusManager.getActiveWindow(); } return owner; } }