resizing and redrawing

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semi - 13 Jan 2008 06:46 GMT

I'm trying to redraw an image after I resize the window, but the image
disappears everytime I resize. How do I scale the image to the size of
the window? Or, another way you can look at it is: I click points onto
a screen and when I resize the window, I want the points not to be
where they were before, but scaled according to the window size. Is
there a function that can just handle resizing of the windows, or is
everything going to go to the repaint( ) method?

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Andrew Thompson - 13 Jan 2008 08:15 GMT

> ...How do I scale the image to the size of
> the window?

One (crude) way to do it..

public void paint(Graphics g) {
g.drawImage(theImg,0,0,getWidth(),getHeight(),this)
// ...

<http://java.sun.com/javase/6/docs/api/java/awt/
Graphics.html#drawImage(java.awt.Image,%20int,%20int,%20int,%20int,
%20java.awt.image.ImageObserver)>

--
Andrew T.
PhySci.org

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semi - 14 Jan 2008 15:35 GMT

> > ...How do I scale the image to the size of
> > the window?
[quoted text clipped - 12 lines]
> Andrew T.
> PhySci.org

Thanks for the reply, but it didn't work. I'm using ImageIcon and not
Image. I need to use ImageIcon.

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Stanimir Stamenkov - 14 Jan 2008 15:55 GMT

Mon, 14 Jan 2008 07:35:38 -0800 (PST), /semi/:

>>> ...How do I scale the image to the size of
>>> the window?
[quoted text clipped - 7 lines]
> Thanks for the reply, but it didn't work. I'm using ImageIcon and not
> Image. I need to use ImageIcon.

You could try using ImageIcon.getImage() [1]:

ImageIcon icon;
...
public void paint(Graphics g) {
Image theImg = icon.getImage();
g.drawImage(theImg, 0, 0, getWidth(), getHeight(), this);
...

[1]
<http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/ImageIcon.html#getImage()>

Signature

Stanimir

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semi - 14 Jan 2008 16:01 GMT

> Mon, 14 Jan 2008 07:35:38 -0800 (PST), /semi/:
>
[quoted text clipped - 24 lines]
> --
> Stanimir

Yes, that works!!! Thank you both for your help.

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Roedy Green - 28 Jan 2008 00:43 GMT

On Mon, 14 Jan 2008 07:35:38 -0800 (PST), semi
<seminole10003@yahoo.com> wrote, quoted or indirectly quoted someone
who said :

>Thanks for the reply, but it didn't work. I'm using ImageIcon and not
>Image. I need to use ImageIcon.

you can extract the Image from an ImageIcon.
the additional parts are just to arrange an automatic MediaTracker.

Signature

Roedy Green, Canadian Mind Products
The Java Glossary, http://mindprod.com

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resizing and redrawing

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