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jMonkeyEngine is a 3-D game engine for adventurous Java developers
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/*
 * Copyright (c) 2009-2019 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.app.state;

import java.awt.Component;

import com.jme3.app.Application;
import com.jme3.app.state.AbstractAppState;
import com.jme3.app.state.AppStateManager;
import com.jme3.system.AWTFrameProcessor;
import com.jme3.system.AWTTaskExecutor;

/**
 * An app state dedicated to the rendering of a JMonkey application within an AWT component.
 * @author Julien Seinturier - COMEX SA - http://www.seinturier.fr
 */
public class AWTComponentAppState extends AbstractAppState {

  private final AWTTaskExecutor executor = AWTTaskExecutor.getInstance();
  
  private Component component = null;
  
  private AWTFrameProcessor processor = null;
 
  private AWTFrameProcessor.TransferMode transferMode = AWTFrameProcessor.TransferMode.ON_CHANGES;
  
  @Override
  public void initialize(AppStateManager stateManager, Application app) {
    super.initialize(stateManager, app);
  }
 
  @Override
  public void stateAttached(final AppStateManager stateManager) {
    processor = new AWTFrameProcessor();
    processor.setTransferMode(transferMode);

    AWTTaskExecutor.getInstance().addToExecute(new Runnable() {

      @Override
      public void run() {
        processor.bind(component, stateManager.getApplication(), stateManager.getApplication().getViewPort());
      }
      
    });
  }
  
  @Override
  public void setEnabled(boolean enabled) {
      super.setEnabled(enabled);
  }
  
  @Override
  public void update(float tpf) {
    executor.execute();
    super.update(tpf);
  }
  
  @Override
  public void cleanup() {
    super.cleanup();
  }
  
  /**
   * Create a new app state dedicated to the rendering of a JMonkey application within the given AWT component.
   * @param component the component that is used as rendering output.
   */
  public AWTComponentAppState(Component component) {
    this.component = component;
  }
  
  /**
   * Get the AWT component that is used as rendering output.
   * @return the AWT component that is used as rendering output.
   * @see #setComponent(Component)
   */
  public Component getComponent() {
    return component;
  }
  
  /**
   * Set the AWT component that is used as rendering output.
   * @param component the AWT component that is used as rendering output.
   * @see #getComponent()
   */
  public void setComponent(Component component) {
    this.component = component;
  }
  
  /**
   * Get the {@link com.jme3.system.AWTFrameProcessor.TransferMode transfer mode} that is used by the underlying frame processor.
   * @return the {@link com.jme3.system.AWTFrameProcessor.TransferMode transfer mode} that is used by the underlying frame processor.
   * @see #setTransferMode(com.jme3.system.AWTFrameProcessor.TransferMode)
   */
  public AWTFrameProcessor.TransferMode getTransferMode(){
    return transferMode;
  }
  
  /**
   * Set the {@link com.jme3.system.AWTFrameProcessor.TransferMode transfer mode} that is used by the underlying frame processor.
   * @param mode the {@link com.jme3.system.AWTFrameProcessor.TransferMode transfer mode} that is used by the underlying frame processor.
   * @see #getTransferMode()
   */
  public void setTransferMode(AWTFrameProcessor.TransferMode mode) {
    this.transferMode = mode;
  }
}