1 /*
   2  * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.javafx.stage;
  27 
  28 import javafx.beans.property.ReadOnlyObjectProperty;
  29 import javafx.stage.Screen;
  30 import javafx.stage.Window;
  31 
  32 import java.security.AccessControlContext;
  33 
  34 /**
  35  * Used to access internal window methods.
  36  */
  37 public final class WindowHelper {
  38     private static WindowAccessor windowAccessor;
  39 
  40     static {
  41         forceInit(Window.class);
  42     }
  43 
  44     private WindowHelper() {
  45     }
  46 
  47     public static void notifyLocationChanged(final Window window,
  48                                              final double x,
  49                                              final double y) {
  50         windowAccessor.notifyLocationChanged(window, x, y);
  51     }
  52 
  53     public static void notifySizeChanged(final Window window,
  54                                          final double width,
  55                                          final double height) {
  56         windowAccessor.notifySizeChanged(window, width, height);
  57     }
  58 
  59     public static void notifyScaleChanged(final Window window,
  60                                           final double newOutputScaleX,
  61                                           final double newOutputScaleY) {
  62         windowAccessor.notifyScaleChanged(window, newOutputScaleX, newOutputScaleY);
  63     }
  64 
  65     static AccessControlContext getAccessControlContext(Window window) {
  66         return windowAccessor.getAccessControlContext(window);
  67     }
  68 
  69     public static void setWindowAccessor(final WindowAccessor newAccessor) {
  70         if (windowAccessor != null) {
  71             throw new IllegalStateException();
  72         }
  73 
  74         windowAccessor = newAccessor;
  75     }
  76 
  77     public static WindowAccessor getWindowAccessor() {
  78         return windowAccessor;
  79     }
  80 
  81     public interface WindowAccessor {
  82         void notifyLocationChanged(Window window, double x, double y);
  83 
  84         void notifySizeChanged(Window window, double width, double height);
  85 
  86         void notifyScreenChanged(Window window, Object from, Object to);
  87 
  88         void notifyScaleChanged(Window window, double newOutputScaleX, double newOutputScaleY);
  89 
  90         ReadOnlyObjectProperty<Screen> screenProperty(Window window);
  91 
  92         AccessControlContext getAccessControlContext(Window window);
  93     }
  94 
  95     private static void forceInit(final Class<?> classToInit) {
  96         try {
  97             Class.forName(classToInit.getName(), true,
  98                           classToInit.getClassLoader());
  99         } catch (final ClassNotFoundException e) {
 100             throw new AssertionError(e);  // Can't happen
 101         }
 102     }
 103 }