Renders a component into an image : GUI Utilities « Swing JFC « Java

1. Java
2. Swing JFC
3. GUI Utilities

Renders a component into an image

 
/*
 *
 * Created on March 16, 2007, 4:34 PM
 *
 * Copyright 2006-2007 Nigel Hughes
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at http://www.apache.org/
 * licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.RenderingHints;
import java.awt.Transparency;
import java.awt.font.FontRenderContext;
import java.awt.font.LineBreakMeasurer;
import java.awt.font.TextAttribute;
import java.awt.font.TextLayout;
import java.awt.image.BufferedImage;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;
import java.util.Hashtable;
import java.util.LinkedList;

import javax.swing.JComponent;
/**

 * @author nigel
 */
public class Utils {
  /** 
   * Renders a component into an image, which is useful for playing with the component's 
   * resultant image in special effects or transitions
   *
   * @param component The component to render
   * @return A buffered image with the rendered component. 
   */
  public static BufferedImage renderComponentToImage(JComponent component){
      //Create the image
      BufferedImage image = createCompatibleImage(component.getWidth(),component.getHeight());
      
      //Render the component onto the image
      Graphics graphics = image.createGraphics();
//      component.update(graphics);
      component.paint(graphics);
      graphics.dispose();
      return image;
  }
  /**
   * Creates an image compatible with the current display
   * 
   * @return A BufferedImage with the appropriate color model
   */
  public static BufferedImage createCompatibleImage(int width, int height) {
    GraphicsConfiguration configuration = GraphicsEnvironment.getLocalGraphicsEnvironment()
        .getDefaultScreenDevice().getDefaultConfiguration();
    return configuration.createCompatibleImage(width, height, Transparency.TRANSLUCENT);
  }
}

   
  

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