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Re: Trying to put a backg

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  To: comp.lang.java.gui
Sabine Dinis Blochberger wrote:
>Trying to put a background image in a JFrame
>
>I have looked this issue up and found that extending JPanel and
>specifying a paintComponent() is one possibility. I haven't tried this
>yet (and a different task popped up for today).

I would recommend you try it, rather than..

>However, I thought that using the JFrames JRootPane or JLayeredPane
>could be less a hassle. 

.'hack' JRootPane or JLayeredPane to achieve the (short 
term) visual effect.

>..Well, it's not really, but I'm curious if this
>could be solved. 

Possibly, but I doubt it could be done with more 
efficiency (expediency, or reusability) in the two
components mentioned.

>Get the whole NetBeans project with a compiled jar (49kB zip file) here
>[1]. Please don't use the image for yourself, or my boss will kill me.

You can alway supply a 'bogus'  (white BG with a red 'X' 
crossing it) image for these test cases. In some (rare) 
instances, I have even 'hot linked' to Sun's* own images.

* Example search..
<http://images.google.com/images?q=+site:java.sun.com+filetype:gif&as_st=y&svnum=10&um=1&hl=en&sa=G&imgsz=icon
>

>What happens is that the image (with transparent areas) is painted
>infront of components instead of behind. 

The transparency whould be transparent, barring the root 
component being set to be 'opaque' (transparent=false).

>..Actually, when I first start
>the application, the image is infront of one button and behind the
>other. Moving the mouse over a button brings it to front, resizing the
>window will put all components behind the image.

Have you called validate()/pack()?  Or is this GUI relying on
'pure luck'?

>By the way, in the final project, the window will not be resizable,
>although I would appreciate some hint towards catering for the image
>being anchored to the lower right corner aswell.

Put it in an appropriate layout(s).  A BorderLayout.WEST*, 
for the component, itself in a JPanel that is placed in the 
BorderLayout.SOUTH of an 'outer' panel, should achieve the 
'lower left' constraint.

* Assuming 'WEST' is left.  I always forget.

-- 
Andrew Thompson
http://www.physci.org/

Message posted via http://www.javakb.com

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Trying to put a backgroun "Sabine Dinis Blochberger" <sabine.dinis.blochberger@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
  Re: Trying to put a backg "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
    Re: Trying to put a backg "Sabine Dinis Blochberger" <sabine.dinis.blochberger@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
    Re: Trying to put a backg "Sabine Dinis Blochberger" <sabine.dinis.blochberger@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
      Re: Trying to put a backg "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
        Re: Trying to put a backg "Sabine Dinis Blochberger" <sabine.dinis.blochberger@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
          Re: Trying to put a backg "Knute Johnson" <knute.johnson@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
            Re: Trying to put a backg "Sabine Dinis Blochberger" <sabine.dinis.blochberger@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
              Re: Trying to put a backg "Lew" <lew@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
                Re: Trying to put a backg "Sabine Dinis Blochberger" <sabine.dinis.blochberger@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
                Re: Trying to put a backg "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
                Re: Trying to put a backg "Sabine Dinis Blochberger" <sabine.dinis.blochberger@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000
                Re: Trying to put a backg "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:42 +0000

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