001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * If you wish your version of this file to be governed by only the CDDL
025: * or only the GPL Version 2, indicate your decision by adding
026: * "[Contributor] elects to include this software in this distribution
027: * under the [CDDL or GPL Version 2] license." If you do not indicate a
028: * single choice of license, a recipient has the option to distribute
029: * your version of this file under either the CDDL, the GPL Version 2 or
030: * to extend the choice of license to its licensees as provided above.
031: * However, if you add GPL Version 2 code and therefore, elected the GPL
032: * Version 2 license, then the option applies only if the new code is
033: * made subject to such option by the copyright holder.
034: *
035: * Contributor(s):
036: *
037: * Portions Copyrighted 2008 Sun Microsystems, Inc.
038: */
039:
040: package org.netbeans.core.windows.nativeaccess;
041:
042: import java.awt.Shape;
043: import java.awt.Window;
044: import javax.swing.Icon;
045: import org.openide.util.Lookup;
046:
047: /**
048: * Support for access to native, window-related routines in operating system.
049: *
050: * @author S. Aubrecht
051: */
052: public abstract class NativeWindowSystem {
053:
054: /** Instance of dummy window manager. */
055: private static NativeWindowSystem dummyInstance;
056:
057: /**
058: * Singleton.
059: *
060: * @return Instance of NativeWindowSystem implementation installed in the system.
061: */
062: public static final NativeWindowSystem getDefault() {
063: NativeWindowSystem wmInstance = Lookup.getDefault().lookup(
064: NativeWindowSystem.class);
065:
066: return (wmInstance != null) ? wmInstance : getDummyInstance();
067: }
068:
069: private static synchronized NativeWindowSystem getDummyInstance() {
070: if (dummyInstance == null) {
071: dummyInstance = new NoNativeAccessWindowSystem();
072: }
073:
074: return dummyInstance;
075: }
076:
077: /**
078: * Check whether it is possible to make top-level windows transparent.
079: *
080: * @return True if top-level windows (Frame, Window, Dialog) can be transparent.
081: */
082: public abstract boolean isWindowAlphaSupported();
083:
084: /**
085: * Adjust transparency of the given window.
086: *
087: * @param w Window, cannot be null.
088: * @param alpha Desired transparency, 1.0f - window is fully opaque,
089: * 0.0f - window is fully transparent.
090: */
091: public abstract void setWindowAlpha(Window w, float alpha);
092:
093: /**
094: * Adjust the shape of the given window.
095: * @param w Window, cannot be null.
096: * @param mask New window shape.
097: */
098: public abstract void setWindowMask(Window w, Shape mask);
099:
100: /**
101: * Adjust the shape of the given window.
102: * @param w Window, cannot be null.
103: * @param mask New window shape.
104: */
105: public abstract void setWindowMask(Window w, Icon mask);
106: }
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