Layers of JPanels? - Game Develloping
Hi all,
I am trying to build a game application. In my game, i want to have two layers : one for the background and one for the foreground where some labels will be moved.
I have successfully built the background as a JPanel added to a JFrame (setContentPane()). But i have some problems about how to place the foreground on top of the background.
I want to have six labels (representing players) in the foreground, which will be moving.
Please help me on how to do the previous things. I would be glad to provide any specific detail you may need.
Thanks in advance,
# 1
"How to Use Layered Panes"
http://java.sun.com/docs/books/tutorial/uiswing/components/layeredpane.html
# 2
Yes, i am using JLayeredPane....
But for some reason, when i do something like this :
JPanel background = new JPanel();
//ADD COMPONENTS TO BACKGROUND
JPanel foreground = new JPanel();
//ADD COMPONENTS TO FOREGROUND
JLayeredPane pane = new JLayeredPane();
pane.add(background, new Integer(0));
pane.add(foreground, new Integer(1));
i am getting wrong results. First of all the two panels seem to be empty but in fact are builted ok (i have set the background panel as content pane of my frame and everything is fine)...
Secondly, it seems that i am not able to use the pack() method. Everything then disappears except the window title and menu.
Finally when i explicitly specify background and foreground size, the window's menu is disappearing.
Any idea?
I would be grateful if you could give me some details on how to add two panels the one in front of another, without the one of them hides the other
Thanks in advance
# 3
I think the problem lies elsewhere with your code.
Can you post a small, compilable example demonstrating your problem?
# 4
JPanel background = new JPanel(new BorderLayout());
// set the background of background
JPanel foreground = new JPanel();
// add components to foreground
foreground.setOpaque(false);
background.add(foreground, BorderLayout.CENTER);
dwga at 2007-7-29 11:28:54 >
# 5
The problem is JLayeredPane's behaviour, in fact, layout.
JLayeredPane does not have any layout, so to say, it does not respect its any of the children's size, IF, the size of the child is not explicitly mentioned.
That means:
1. JLayeredPane lp = new JLayeredPane();
2. JPanel front = new JPanel();
3. front.setSize(300,300);//specify size according to your req.
4. front.add(new JLabel("Front"));
5. JPanel back = new JPanel();
6. back.setSize(300,300);//specify size according to your req.
7. back.add(new JLabel("Back"));
8. lp.add(back, 0);
9. lp.add(front, 1);
...add(lp);
:
The above code will properly with line numbers (3 & 6) but wont display anything without those lines.
