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From: "Sabine Dinis Blochberger" <sabine.dinis.blochberger@THRWHITE.remove-dii-this>
Subject: Re: Trying to put a backg
Message-ID: <A62dndYPCPJE-RranZ2dnUVZ8rGdnZ2d@novis.pt>
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Date: Wed, 27 Apr 2011 15:42:19 GMT
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  To: comp.lang.java.gui
Andrew Thompson wrote:

> Sabine Dinis Blochberger wrote:
> >> >Trying to put a background image in a JFrame
> ...
> >In option two, adding one JPanel with BorderLayout.EAST, the other with
> >BorderLayout.SOUTH, all I get is a tiny square off the window bounds. 
> 
> Images load asynchonously, so maybe the image
> is returning a -1,-1 size at time of pack().  One way
> to fix that is to use a MediaTracker.  Knute has some
> good examples of loading and displaying images, here..
> <http://rabbitbrush.frazmtn.com/>
> 
> 
The new contructor thus looks like this

//---
      public BackgroundPanel(String imgName) {
        try {
            image = createImageIcon(imgName);
            
            // Create a MediaTracker instance,
            // to montior loading of images
            final MediaTracker tracker = new MediaTracker(this);

            // Register it with media tracker
            tracker.addImage(image.getImage(), 1);
            // Wait until all images have loaded
            tracker.waitForAll();
        } catch (Exception ex) { ex.printStackTrace(); }
      }
//---

It didn't make a difference. The square is a few pixels large, you can
actually see part of the image on it - it's "only" cropped.

Then I tried to change the contentPanes layout, and it actually anchors
the panel as I want:
//---
    private void addSimply() {
        final JPanel bgPanel = new BackgroundPanel("background.png"); 
        bgPanel.setOpaque(false);
        
        final Container cp = getContentPane();
        cp.setLayout(new BorderLayout());
        cp.add(bgPanel, BorderLayout.EAST);
        bgPanel.setBounds(0, 0, getWidth(), getHeight());
    }
//---

However, the BackgroundPanel is now only a few pixels wide, and button 3
is not anchored to the right window edge anymore (I can live without
that though)...

-- 
Sabine Dinis Blochberger

Op3racional
www.op3racional.eu

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