Solved

TabbedPane problem

Posted on 2010-09-13
10
403 Views
Last Modified: 2013-11-23
With the code below, the bottom border of the tabs appear to be occluded.
Occluded TabCan this be fixed?

package tabbedPaneTest;



import java.awt.Color;

import java.awt.Dimension;

import java.awt.FlowLayout;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;



import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTabbedPane;

import javax.swing.SwingConstants;

import javax.swing.UIManager;



/**

 * TabbedPane

 *

 */

public class TabbedPane extends JTabbedPane { 



	private static TabbedPane instance = null;



	private JPanel bluePanel;

	private JPanel redPanel;

	private JPanel yellowPanel;



	final private int YELLOW_INDEX = 0;

	final private int BLUE_INDEX = 1;

	final private int RED_INDEX = 2;



	private JPanel blueTabTitlePanel;

	private JPanel redTabTitlePanel;

	private JPanel yellowTabTitlePanel;

	

	private JLabel blueLabel;

	private JLabel redLabel; 

	private JLabel yellowLabel;



	

    /**

	 * singleton, call initialize() instead

	 */

	private TabbedPane() {

		setLayout();

	}



	/**

	 * singleton

	 * 

	 * @return

	 */

	public static TabbedPane getInstance()

	{

		if (instance == null) {

			instance = new TabbedPane();

		}

		return instance;

	}



	/** 

	 * set layout of tabs

	 */

	private void setLayout() {



		this.setTabPlacement(SwingConstants.LEFT); // set tabs on left side

		

		FlowLayout flowLayout = new FlowLayout(FlowLayout.LEFT, 5, 5);



		yellowPanel = new JPanel();

		yellowPanel.setName("Yellow");

		this.addTab(yellowPanel.getName(), yellowPanel);

		

		yellowTabTitlePanel = new JPanel();

		yellowTabTitlePanel.setLayout(flowLayout);

		yellowTabTitlePanel.setOpaque(true);

		yellowLabel = new JLabel(yellowPanel.getName());

		yellowLabel.setOpaque(true);

		yellowTabTitlePanel.add(yellowLabel);

		Dimension dimension = yellowTabTitlePanel.getPreferredSize();

		int width = dimension.width;

		int height = dimension.height;

		yellowTabTitlePanel.setPreferredSize(new Dimension(width, height));

		this.setTabComponentAt(YELLOW_INDEX, yellowTabTitlePanel);

		

		bluePanel = new JPanel();

		bluePanel.setName("Blue");

		this.addTab(bluePanel.getName(), bluePanel);

		

		blueTabTitlePanel = new JPanel();

		blueTabTitlePanel.setLayout(flowLayout);

		blueTabTitlePanel.setOpaque(true);

		blueLabel = new JLabel(bluePanel.getName());

		blueLabel.setOpaque(true);

		blueLabel.setBackground(Color.white); // first tab selected

		blueTabTitlePanel.setBackground(Color.white); // first tab selected

		blueTabTitlePanel.add(blueLabel);

		blueTabTitlePanel.setPreferredSize(new Dimension(width, height));

		this.setTabComponentAt(BLUE_INDEX, blueTabTitlePanel);



		redPanel = new JPanel();

		redPanel.setName("Red");

		this.addTab(redPanel.getName(), redPanel);

		

		redTabTitlePanel = new JPanel();

		redTabTitlePanel.setLayout(flowLayout);

		redTabTitlePanel.setOpaque(true);

		redLabel = new JLabel(redPanel.getName());

		redLabel.setOpaque(true);

		redTabTitlePanel.add(redLabel);

		redTabTitlePanel.setPreferredSize(new Dimension(width, height));

		this.setTabComponentAt(RED_INDEX, redTabTitlePanel);

		

	}

	

	/**

	 * 

	 * @param args

	 */

	public static void main(String args[]) {



		try{

			UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

		}

		catch (Exception e) {

			e.printStackTrace();

		}



		try {



			final JFrame frame = new JFrame();

			TabbedPane tabbedPane =  TabbedPane.getInstance();



			frame.getContentPane().add(new JScrollPane(tabbedPane));

			frame.setTitle("TabbedPane");

			frame.setPreferredSize(new Dimension(500, 500));

			frame.addWindowListener(new WindowAdapter() {

				@Override

				public void windowClosing(WindowEvent e) {

				}

			});



			frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

			frame.setLocation(300, 200);

			frame.pack();

			frame.setVisible(true);



		} catch (Exception e) {

			e.printStackTrace();

		}

	}



}

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Question by:allelopath
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10 Comments
 
LVL 92

Expert Comment

by:objects
ID: 33667710
looks like your size of yuor panel is too high for the space available.
Do you actually need to paint the panel background?
0
 
LVL 1

Author Comment

by:allelopath
ID: 33668537
I've tried limiting the height of the panel, but that doesn't fix the problem.

In this example, the need for the panel is not apparent. In an actual application, I have an icon and text on the panel, the panel serving as the container for the 2 components.

0
 
LVL 92

Expert Comment

by:objects
ID: 33668551
why aren't you just using a JLabel
0
 
LVL 26

Expert Comment

by:ksivananth
ID: 33669935
you may want to override paintcomponent...
0
 
LVL 1

Author Comment

by:allelopath
ID: 33672138
The same thing happens if I use JLabel:
//this.setTabComponentAt(YELLOW_INDEX, yellowTabTitlePanel);

this.setTabComponentAt(YELLOW_INDEX, yellowLabel);

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LVL 1

Author Comment

by:allelopath
ID: 33672163
>>you may want to override paintcomponent...
Can you provide detail? Do you mean create a TabTilePanel class and override paintComponent in there? If so, what would I do in paintComponent?
0
 
LVL 26

Accepted Solution

by:
ksivananth earned 500 total points
ID: 33672333
try adding this code,

            try{
                  UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                  UIManager.getDefaults().put( "TabbedPane.tabInsets", new Insets( 1, 2, 3, 2 ) ) ;
            }
            catch (Exception e) {
                  e.printStackTrace();
            }
0
 
LVL 1

Author Comment

by:allelopath
ID: 33673814
ksivananth:
That works. Thank you.

This would affect all tabbed panes in an application, yes?
If so, is there a way to get to it affect only this one tabbed pane?

0
 
LVL 26

Assisted Solution

by:ksivananth
ksivananth earned 500 total points
ID: 33679539
>>This would affect all tabbed panes in an application, yes?

Yes

>>If so, is there a way to get to it affect only this one tabbed pane?

you need to override the "tabInsets" property in the WindowsTabbedPaneUI( may differ based on the env you run ) and set this as the UI for your tabbedpane, for e.g., in windows,

                  TabbedPane tabbedPane =  TabbedPane.getInstance();
                  tabbedPane.setUI( new WindowsTabbedPaneUI(){
                        protected void installDefaults(){
                              super.installDefaults() ;
                              tabInsets = new Insets( 1, 1, 3, 1 ) ;
                        }
                  } ) ;
0
 
LVL 1

Author Closing Comment

by:allelopath
ID: 33681868
Thanks. good stuff.
0

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