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Thread: Toolbar max width

  1. #1
    Senior Member
    Join Date
    Jul 2013
    Thanked 121 Times in 105 Posts

    Default Toolbar max width

    Hi there.

    I am really struggling with a toolbar right now. No matter what I try it just wont accept its maximum width.

    This is how it is build:
    1) JToolBar (flow layout)
    2) A JTabbedPane within the JToolBar
    3) A JPanel (border layout) as a tab within the JTabbedPane
    4) A JScrollPane within the JPanel (center)
    5) A JList within the viewport view of the JScrollPane

    I tried to set the MaximumSize of any single or all of these components. It never worked.
    No matter what I did, the toolbar always was the size of the biggest item in the JList.

    Here are some screenshots with the code used to create them:
    		JToolBar toolBar = new JToolBar();
    		add(toolBar, BorderLayout.EAST);
    		JTabbedPane toolBarPnl = new JTabbedPane(JTabbedPane.TOP);

    		JToolBar toolBar = new JToolBar();
    		add(toolBar, BorderLayout.EAST);
    		JTabbedPane toolBarPnl = new JTabbedPane(JTabbedPane.TOP);
    		toolBarPnl.setMaximumSize(new Dimension(256, Integer.MAX_VALUE));
    Notice that this time the JScrollPane is indeed capped at 256 pixels in width, but the toolbar itself is still growing as large as the biggest item in the JList.

    I would really appreciate if somebody could tell me what I need to do to keep the toolbar from growing in width.

    On a sidenote, I would also like to ask if anybody could tell me how to make a JToolBar resizable.

    Thank you all very much.

  2. #2
    Senior Member
    Join Date
    Jul 2013
    Thanked 121 Times in 105 Posts

    Default Re: Toolbar max width

    I have actually made a small test program which shows my problem:
    import java.awt.BorderLayout;
    import java.awt.Dimension;
    import java.awt.EventQueue;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.border.EmptyBorder;
    import javax.swing.DefaultListModel;
    import javax.swing.JToolBar;
    import javax.swing.JTabbedPane;
    import javax.swing.JScrollPane;
    import javax.swing.JList;
    public class Test extends JFrame {
    	private static final long serialVersionUID = 1L;
    	public static void main(String[] args) {
    		EventQueue.invokeLater(new Runnable() {
    			public void run() {
    				try {
    					Test frame = new Test();
    				} catch (Exception e) {
    	private static final Dimension MAX_WIDTH_256 = new Dimension(256, Integer.MAX_VALUE);
    	public Test() {
    		setBounds(100, 100, 450, 300);
    		JPanel contentPane = new JPanel();
    		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
    		contentPane.setLayout(new BorderLayout(0, 0));
    		JToolBar toolBar = new JToolBar();
    		contentPane.add(toolBar, BorderLayout.EAST);
    		JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);
    		JPanel tab = new JPanel();
    		tab.setLayout(new BorderLayout(0, 0));
    		tabbedPane.addTab("Some Strings", null, tab, null);
    		JScrollPane scrollPane = new JScrollPane();
    		tab.add(scrollPane, BorderLayout.CENTER);
    		DefaultListModel<String> listModel = new DefaultListModel<String>();
    		for (String str : new String[] {
    				"Even Bigger",
    				"Already quite Big",
    				"This one is really really big, it has an insane size and showing it in a list would be a really stupid idea!",
    		}) {
    		JList<String> list = new JList<>();
    		JPanel panel = new JPanel();
    		panel.setPreferredSize(new Dimension(Integer.MAX_VALUE, Integer.MAX_VALUE));
    		contentPane.add(panel, BorderLayout.CENTER);
    If anybody could make the toolbar accept its maximum size I would really appreciate.

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