drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver observer)
Where:
img - the specified image to be drawn. This method does nothing if img is null.
dx1 - the x coordinate of the first corner of the destination rectangle.
dy1 - the y coordinate of the first corner of the destination rectangle.
dx2 - the x coordinate of the second corner of the destination rectangle.
dy2 - the y coordinate of the second corner of the destination rectangle.
sx1 - the x coordinate of the first corner of the source rectangle.
sy1 - the y coordinate of the first corner of the source rectangle.
sx2 - the x coordinate of the second corner of the source rectangle.
sy2 - the y coordinate of the second corner of the source rectangle.
observer - object to be notified as more of the image is scaled and converted.
 |
| Draw partial scaled image using Graphics.drawImage() |
package javaswing;
import java.awt.Graphics;
import java.awt.Image;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
/**
*
* @web http://java-buddy.blogspot.com/
*/
public class JavaTestSwing {
static JFrameWin jFrameWindow;
public static class MyComponent extends JComponent{
@Override
protected void paintComponent(Graphics g) {
try {
//prepare a original Image source
Image image = ImageIO.read(this.getClass().getResource("duke.png"));
int w = image.getWidth(null);
int h = image.getHeight(null);
g.drawImage(image, 0, 0, w, h, null);
g.drawImage(image,
0, //dx1
h, //dy1
w, //dx2
h + h, //dy2
0, //sx1
0, //sy1
w/2, //sx2
h/2, //sy2
null); //ImageObserver
} catch (IOException ex) {
Logger.getLogger(JavaTestSwing.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
public static class JFrameWin extends JFrame{
public JFrameWin(){
this.setTitle("java-buddy.blogspot.com");
this.setSize(300, 300);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
MyComponent myComponent = new MyComponent();
this.add(myComponent);
}
}
public static void main(String[] args){
Runnable doSwingLater = new Runnable(){
@Override
public void run() {
jFrameWindow = new JFrameWin();
jFrameWindow.setVisible(true);
}
};
SwingUtilities.invokeLater(doSwingLater);
}
}
