Magnified image in new window?

Question

Hey all,
Ive got a little coding problem yet again. Im trying to code a method that will take a portion of an existing buffered image, magnify it and display it in a new window. But right now the window is coming up, but the window is just white and does not show the magnified image. Heres my code:
public void magImage(){
Frame mag= new Frame();
mag.setVisible(true);
mag.setTitle("MagImage at " + hmult+ "X");
mag.setSize(200,200);
Graphics g= getGraphics();
Graphics2D g2 = (Graphics2D) g;
BufferedImage magi= new BufferedImage (200,200,BufferedImage.TYPE_INT_RGB);
Graphics2D magContext= magi.createGraphics();
int scalew;
int scaleh;
scalew=(int) (imgw * hmult);
scaleh= (int) (imgh * hmult);
magContext.drawImage(image,xpos,ypos,scalew,scaleh,mag);
magContext.drawImage(buffer,xpos,ypos,scalew,scaleh,mag);
magContext.drawImage(buffer,xpos,ypos,scalew,scaleh,mag);
Can anyone see whats wrong with this?
Thanks,
Rick

Answer 1

I don't know the details of this case real well, but often when stuff does not show up on a GUI for me I throw in a call to validate. (e.g.:
myComponent.validate ();
This wakes up the layout manager and calls repaint as well as far as I remember and can tell.
One issue you may have, which I am not sure from the code I have seen, is the window may be repainted blank after you paint it with the picture. You may want to create a component for the magnified image which extends a JPanel or such and then have the component override the paint method to ensure the object is always getting repainted.
Just a thought...
Tony