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Is it possible to put Panel on the Image

Posted on 2004-04-14
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Last Modified: 2013-11-23
I have a doubt. Can i place a panel on top of the image in the frame?

I have a JFrame where i want the image to be displayed... and i have a JPanel where i want it to be displayed but on top of the image. I am talking about the skin of the GUI...   In VC++, you can do that.. is there a way to do in java??

Thanks in advance
Ram
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Question by:rampriya_sb
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by:
CEHJ earned 168 total points
ID: 10826205
If you want to float components over the image just override paintComponent, being careful to call super.paintComponent
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Author Comment

by:rampriya_sb
ID: 10826230
can u give me some more clue? some small code snippet wud be appreciated
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Expert Comment

by:CEHJ
ID: 10826251
public void paintComponent(Graphics g) {
      super.paintComponent(g);
      // call drawImage here
}

You'll still be able to add components leaving the image there
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Expert Comment

by:CEHJ
ID: 10826257
(oh that's overriding the paintComponent of JPanel btw)
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Author Comment

by:rampriya_sb
ID: 10826391
is it JPanel u r talking about or the JFrame?
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Expert Comment

by:CEHJ
ID: 10826409
JPanel
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Expert Comment

by:Tommy Braas
ID: 10826551
If you want the image drawn behind the panel, you need to override paintComponent() (see CEHJ's comment) in your JFrame instance.
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Expert Comment

by:CEHJ
ID: 10826609
You can't do that actually - JFrame has no paintComponent. Easiest to add another JPanel to the frame and then place the final one on that
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Assisted Solution

by:Tommy Braas
Tommy Braas earned 166 total points
ID: 10826727
Oh, my bad.

rampriya_sb, recap of information so far:
Set BorderLayout as your layout manager for the JFrame's content pane
Override paintComponent in a subclass of JPanel, in order to paint the image, as described above
Add an instance of the JPanel described above to the BorderLayout.CENTER of the JFrame
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Expert Comment

by:CEHJ
ID: 10826764
>>Set BorderLayout as your layout manager for the JFrame's content pane...

Well of course, it's still not clear what the intention is, so this is probably a little bit too assumptive ;-)
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Expert Comment

by:Tommy Braas
ID: 10826837
>> probably a little bit too assumptive
possibly, but not if he wants the image to cover the complete area of the JFrame
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Author Comment

by:rampriya_sb
ID: 10826847
I want the image to cover the entire area and place a Panel on the image...
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Expert Comment

by:CEHJ
ID: 10826874
Should be OK then
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Expert Comment

by:Tommy Braas
ID: 10826970
yep, I think that's it! ;-)
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Author Comment

by:rampriya_sb
ID: 10827156
As suggested, i overrode paintComponent method and put the image

class TestPanel extends JPanel
{

JPanel pnlAnotherPanel;
public TestPanel()
{
    pnlAnotherPanel = new JPanel();
    pnlAnotherPanel.setBackground(Color.white);
    pnlAnotherPanel.setBounds(new Rectangle(30,30,60,80));
    this.add(pnlAnotherPanel,null);
}

public void paintComponent(Graphics g)
{
  super.paintComponent(g);
  Image img=Toolkit.getDefaultToolkit().getImage("testimg.jpg");
  g.drawImage(img,0,0,this);
}
}

When i try to put this JPanel class to the Frame and try to runthe program, only the image is displayed and not the panel(pnlAnotherPanel)..... so what shud i do for that? i tried setting the panel to opaque, but didnt help...
 

Then i tried putting
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Author Comment

by:rampriya_sb
ID: 10827774
i m not finding any luck still.... shud i put the panel in the paintComponent method??
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Assisted Solution

by:objects
objects earned 166 total points
ID: 10827842
Theres no need to override paintComponent, just add your panel to whatever component is displaying your image.

eg.

JLabel back = new JLabel(image);
JPanel panel = new JPanel();
back.add(panel);
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Expert Comment

by:objects
ID: 10827879
If you instead want the panel to float above your existing component hierarchy then add the panel to the glass pane or a layered pane.
http://java.sun.com/docs/books/tutorial/uiswing/components/rootpane.html
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Expert Comment

by:Tommy Braas
ID: 11046310
Three way point split
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