Mega Code Archive
BufferImage based Label
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/*
* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. 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 Sun Microsystems 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.
*/
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
public class ImageLabel extends Component {
public static void main(String args[]) {
JFrame frame = new JFrame("Image Label");
BufferedImage img = null;
try {
String imageFileName = "painting.gif";
img = ImageIO.read(new File(imageFileName));
} catch (IOException e) {
}
frame.add("Center", new ImageLabel(img, "Java 2D Graphics!"));
frame.pack();
frame.setVisible(true);
}
BufferedImage img;
String text;
Font font;
public ImageLabel(BufferedImage img, String text) {
this.img = img;
this.text = text;
font = new Font("Serif", Font.PLAIN, 36);
}
/* We want to size the component around the text. */
public Dimension getPreferredSize() {
FontMetrics metrics = img.getGraphics().getFontMetrics(font);
int width = metrics.stringWidth(text) * 2;
int height = metrics.getHeight() * 2;
return new Dimension(width, height);
}
public void paint(Graphics g) {
/*
* Draw the image stretched to exactly cover the size of the drawing area.
*/
Dimension size = getSize();
g.drawImage(img, 0, 0, size.width, size.height, 0, 0, img.getWidth(null),
img.getHeight(null), null);
/*
* Fill a rounded rectangle centered in the drawing area. Calculate the size
* of the rectangle from the size of the text
*/
g.setFont(font);
FontRenderContext frc = ((Graphics2D) g).getFontRenderContext();
Rectangle2D bounds = font.getStringBounds(text, frc);
int wText = (int) bounds.getWidth();
int hText = (int) bounds.getHeight();
int rX = (size.width - wText) / 2;
int rY = (size.height - hText) / 2;
g.setColor(Color.yellow);
g.fillRoundRect(rX, rY, wText, hText, hText / 2, hText / 2);
/*
* Draw text positioned in the rectangle. Since the rectangle is sized based
* on the bounds of the String we can position it using those bounds.
*/
int xText = rX - (int) bounds.getX();
int yText = rY - (int) bounds.getY();
g.setColor(Color.black);
g.setFont(font);
g.drawString(text, xText, yText);
}
}
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