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Thread: JLabel as part of JTabbedPane tab component overwrites background color

  1. #1
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    Default JLabel as part of JTabbedPane tab component overwrites background color

    Hi there,

    I am using my own custom component for a JTabbedPanes tab component. My custom component consists of a JLabel and a JButton (to close the tab).
    Code of the custom component:
    	protected static class Tab extends JPanel {
    		private static final long serialVersionUID = 1L;
     
    		private static Icon cachedIcon = null;
     
    		private final JButton btnClose;
     
    		public Tab(Ref ref) {
    			super();
    			if (cachedIcon == null) {
    				String iconPath = "/javax/swing/plaf/metal/icons/ocean/close.gif";
    				cachedIcon = new ImageIcon(Tab.class.getResource(iconPath));
    			}
    			setLayout(new GridLayout(0, 2, 0, 0));
     
    			JLabel lblName = new JLabel(ref.getName());
    			add(lblName);
     
    			btnClose = new JButton(cachedIcon);
    			add(btnClose);
    		}
     
    		public void addActionListener(ActionListener l) {
    			btnClose.addActionListener(l);
    		}
     
    		public void removeActionListener(ActionListener l) {
    			btnClose.removeActionListener(l);
    		}
     
    	}
    This is how I setup my tabbed pane:
    addTab(ref.getName(), panel);
    Tab tab = new Tab(ref);
    setTabComponentAt(indexOfComponent(panel), tab);

    When the tabbed pane is drawn it looks like this:
    image1.jpg

    The tab in the center is selected. You can clearly see, that the area of the JLabel uses a grey background although the rest of the tab component is light blue.

    What should I do to make the JLabels backdrop transparent?

    Thank you all for the help.


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    Administrator copeg's Avatar
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    Default Re: JLabel as part of JTabbedPane tab component overwrites background color

    Set the opacity of the component to false.

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    Default Re: JLabel as part of JTabbedPane tab component overwrites background color

    Do you mean "setOpaque(boolean)"?
    I tried that and it didnt make a difference. If you meant something else please elaborate.

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    Super Moderator Norm's Avatar
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    Default Re: JLabel as part of JTabbedPane tab component overwrites background color

    Can you make a small, complete program that compiles, executes and shows the problem?
    If you don't understand my answer, don't ignore it, ask a question.

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    Administrator copeg's Avatar
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    Default Re: JLabel as part of JTabbedPane tab component overwrites background color

    That's what I meant. Try doing so for the Tab object as well as the JLabel it contains. If what you try doesn't achieve the desired result, post the updated code.

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    Default Re: JLabel as part of JTabbedPane tab component overwrites background color

    Quote Originally Posted by copeg View Post
    That's what I meant. Try doing so for the Tab object as well as the JLabel it contains. If what you try doesn't achieve the desired result, post the updated code.
    Thanks copeq, I did not make the Tab opaque, only the label, and that was the trick.
    You really helped me out a lot.

    In retrospect, I am pretty stupid for making such a mistake.

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