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This is a backport of OpenJFX 8 to run on Java 7.
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/*
 * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.javafx.tk.quantum;

import com.sun.glass.events.WindowEvent;
import com.sun.glass.ui.Application;
import com.sun.glass.ui.Screen;
import com.sun.glass.ui.Window;

import com.sun.javafx.tk.FocusCause;

import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.PrivilegedAction;

class GlassWindowEventHandler extends Window.EventHandler implements PrivilegedAction {

    private final WindowStage stage;

    private Window window;
    private int type;

    public GlassWindowEventHandler(WindowStage stage) {
        this.stage = stage;
    }

    @Override
    public Void run() {
        if (stage == null || stage.stageListener == null) {
            return null;
        }
        switch (type) {
            case WindowEvent.MINIMIZE:
                stage.stageListener.changedIconified(true);
                break;
            case WindowEvent.MAXIMIZE:
                stage.stageListener.changedMaximized(true);
                break;
            case WindowEvent.RESTORE:
                stage.stageListener.changedIconified(false);
                stage.stageListener.changedMaximized(false);
                break;
            case WindowEvent.MOVE:
                stage.stageListener.changedLocation(window.getX(), window.getY());
                //We need to sync the new x,y for painting
                if (!Application.GetApplication().hasWindowManager()) {
                    AbstractPainter.renderLock.lock();
                    try { 
                        GlassScene scene = stage.getScene();
                        if (scene != null) {
                            scene.updateSceneState();
                        }
                    } finally { 
                        AbstractPainter.renderLock.unlock(); 
                    }
                }
                break;
            case WindowEvent.RESIZE:
                stage.stageListener.changedSize(window.getWidth(), window.getHeight());
                break;
            case WindowEvent.FOCUS_GAINED:
                WindowStage.addActiveWindow(stage);
                stage.stageListener.changedFocused(true, FocusCause.ACTIVATED);
                break;
            case WindowEvent.FOCUS_LOST:
                stage.stageListener.changedFocused(false, FocusCause.DEACTIVATED);
                break;
            case WindowEvent.FOCUS_UNGRAB:
                stage.stageListener.focusUngrab();
                break;
            case WindowEvent.FOCUS_GAINED_FORWARD:
                WindowStage.addActiveWindow(stage);
                stage.stageListener.changedFocused(true, FocusCause.TRAVERSED_FORWARD);
                break;
            case WindowEvent.FOCUS_GAINED_BACKWARD:
                WindowStage.addActiveWindow(stage);
                stage.stageListener.changedFocused(true, FocusCause.TRAVERSED_BACKWARD);
                break;
            case WindowEvent.FOCUS_DISABLED:
                stage.handleFocusDisabled();
                break;
            case WindowEvent.INIT_ACCESSIBILITY:
                stage.stageListener.initAccessibleTKStageListener();
                break;
            case WindowEvent.DESTROY:
                stage.setPlatformWindowClosed();
                stage.stageListener.closed();
                break;
            case WindowEvent.CLOSE:
                stage.stageListener.closing();
                break;
            default:
                if (QuantumToolkit.verbose) {
                    System.err.println("GlassWindowEventHandler: unknown type: " + type);
                }
                break;
        }
        return null;
    }

    @Override
    public void handleWindowEvent(final Window window, final long time, final int type) {
        this.window = window;
        this.type = type;

        AccessControlContext acc = stage.getAccessControlContext();
        AccessController.doPrivileged(this, acc);
    }
    
    @Override
    public void handleScreenChangedEvent(Window window, long time, Screen oldScreen, Screen newScreen) {
        GlassScene scene = stage.getScene();
        if (scene != null) {
            AbstractPainter.renderLock.lock();
            try { 
                scene.entireSceneNeedsRepaint();
                scene.updateSceneState();
            } finally { 
                AbstractPainter.renderLock.unlock(); 
            }
        }
    }
}