?? myimage.java
字號:
// MyImage.java
// MyImage is a MyShape subclass that contains a JPEG image.
package com.deitel.advjhtp1.drawing.model.shapes;
// Java core packages
import java.io.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.geom.*;
// third-party packages
import org.w3c.dom.*;
import com.sun.image.codec.jpeg.*;
public class MyImage extends MyShape {
private BufferedImage image;
private String fileName;
// draw image on given Graphics2D context
public void draw( Graphics2D g2D )
{
// draw image on Graphics2D context
g2D.drawImage( getImage(), getX1(), getY1(), null );
}
// return true if Point falls within MyImage
public boolean contains( Point2D point )
{
Rectangle2D.Float rectangle = new Rectangle2D.Float(
getX1(), getY1(), getWidth(), getHeight() );
return rectangle.contains( point );
}
// get MyImage image
public BufferedImage getImage()
{
return image;
}
// set filename for loading image
public void setFileName( String name )
{
// load image from file
try {
File file = new File( name );
FileInputStream inputStream =
new FileInputStream( file );
// decode JPEG image
JPEGImageDecoder decoder =
JPEGCodec.createJPEGDecoder( inputStream );
image = decoder.decodeAsBufferedImage();
setPoint2( getX1() + image.getWidth(),
getY1() + image.getHeight() );
}
// handle exception reading image from file
catch ( IOException ioException ) {
ioException.printStackTrace();
}
// set fileName if try is successful
fileName = name;
}
// get image filename
public String getFileName()
{
return fileName;
}
// get MyImage XML Element
public Element getXML( Document document )
{
Element shapeElement = super.getXML( document );
shapeElement.setAttribute( "type", "MyImage" );
// create filename Element
Element temp = document.createElement( "fileName" );
temp.appendChild( document.createTextNode(
getFileName() ) );
shapeElement.appendChild( temp );
return shapeElement;
} // end method getXML
}
/***************************************************************
* (C) Copyright 2002 by Deitel & Associates, Inc. and *
* Prentice Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have *
* used their best efforts in preparing the book. These *
* efforts include the development, research, and testing of *
* the theories and programs to determine their effectiveness. *
* The authors and publisher make no warranty of any kind, *
* expressed or implied, with regard to these programs or to *
* the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for *
* incidental or consequential damages in connection with, or *
* arising out of, the furnishing, performance, or use of *
* these programs. *
***************************************************************/
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