1 files changed, 99 insertions, 0 deletions
diff --git a/engine/src/core/com/jme3/system/SystemListener.java b/engine/src/core/com/jme3/system/SystemListener.java
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+++ b/engine/src/core/com/jme3/system/SystemListener.java
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+/*
+ * Copyright (c) 2009-2010 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.jme3.system;
+
+/**
+ * The <code>ContextListener> provides a means for an application
+ * to receive events relating to a context.
+ */
+public interface SystemListener {
+
+    /**
+     * Callback to indicate the application to initialize. This method
+     * is called in the GL/Rendering thread so any GL-dependent resources
+     * can be initialized.
+     */
+    public void initialize();
+
+    /**
+     * Called to notify the application that the resolution has changed.
+     * @param width
+     * @param height
+     */
+    public void reshape(int width, int height);
+
+    /**
+     * Callback to update the application state, and render the scene
+     * to the back buffer.
+     */
+    public void update();
+
+    /**
+     * Called when the user requests to close the application. This
+     * could happen when he clicks the X button on the window, presses
+     * the Alt-F4 combination, attempts to shutdown the process from 
+     * the task manager, or presses ESC. 
+     * @param esc If true, the user pressed ESC to close the application.
+     */
+    public void requestClose(boolean esc);
+
+    /**
+     * Called when the application gained focus. The display
+     * implementation is not allowed to call this method before
+     * initialize() has been called or after destroy() has been called.
+     */
+    public void gainFocus();
+
+    /**
+     * Called when the application lost focus. The display
+     * implementation is not allowed to call this method before
+     * initialize() has been called or after destroy() has been called.
+     */
+    public void loseFocus();
+
+    /**
+     * Called when an error has occured. This is typically
+     * invoked when an uncought exception is thrown in the render thread.
+     * @param errorMsg The error message, if any, or null.
+     * @param t Throwable object, or null.
+     */
+    public void handleError(String errorMsg, Throwable t);
+
+    /**
+     * Callback to indicate that the context has been destroyed (either
+     * by the user or requested by the application itself). Typically
+     * cleanup of native resources should happen here. This method is called
+     * in the GL/Rendering thread.
+     */
+    public void destroy();
+}