1 /* 2 * Copyright (c) 2009-2010 jMonkeyEngine 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 package com.jme3.system; 34 35 /** 36 * The <code>ContextListener> provides a means for an application 37 * to receive events relating to a context. 38 */ 39 public interface SystemListener { 40 41 /** 42 * Callback to indicate the application to initialize. This method 43 * is called in the GL/Rendering thread so any GL-dependent resources 44 * can be initialized. 45 */ 46 public void initialize(); 47 48 /** 49 * Called to notify the application that the resolution has changed. 50 * @param width 51 * @param height 52 */ 53 public void reshape(int width, int height); 54 55 /** 56 * Callback to update the application state, and render the scene 57 * to the back buffer. 58 */ 59 public void update(); 60 61 /** 62 * Called when the user requests to close the application. This 63 * could happen when he clicks the X button on the window, presses 64 * the Alt-F4 combination, attempts to shutdown the process from 65 * the task manager, or presses ESC. 66 * @param esc If true, the user pressed ESC to close the application. 67 */ 68 public void requestClose(boolean esc); 69 70 /** 71 * Called when the application gained focus. The display 72 * implementation is not allowed to call this method before 73 * initialize() has been called or after destroy() has been called. 74 */ 75 public void gainFocus(); 76 77 /** 78 * Called when the application lost focus. The display 79 * implementation is not allowed to call this method before 80 * initialize() has been called or after destroy() has been called. 81 */ 82 public void loseFocus(); 83 84 /** 85 * Called when an error has occured. This is typically 86 * invoked when an uncought exception is thrown in the render thread. 87 * @param errorMsg The error message, if any, or null. 88 * @param t Throwable object, or null. 89 */ 90 public void handleError(String errorMsg, Throwable t); 91 92 /** 93 * Callback to indicate that the context has been destroyed (either 94 * by the user or requested by the application itself). Typically 95 * cleanup of native resources should happen here. This method is called 96 * in the GL/Rendering thread. 97 */ 98 public void destroy(); 99 } 100
