Example usage for javax.swing JList getPreferredSize

Introduction

In this page you can find the example usage for javax.swing JList getPreferredSize.

Prototype

@Transient
public Dimension getPreferredSize() 

Source Link

Document

If the preferredSize has been set to a non-null value just returns it.

Usage

From source file:kenh.xscript.elements.Debug.java

private void initial(Container c) {
    c.setLayout(new BorderLayout());

    // Add variable list

    DefaultListModel<String> model = new DefaultListModel();

    if (this.getEnvironment() != null) {
        java.util.Set<String> keys = this.getEnvironment().getVariables().keySet();
        for (String key : keys) {
            model.addElement(key);//from w  w  w. j ava2s  .com
        }
    } else {
        for (int i = 1; i < 10; i++) {
            model.addElement("Variable " + i);
        }
        model.addElement("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
    }

    JList list = new JList(model);
    list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    JScrollPane listPane = new JScrollPane();
    listPane.setViewportView(list);
    listPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);

    c.add(listPane, BorderLayout.EAST);

    list.setPreferredSize(new Dimension(150, list.getPreferredSize().height));

    // 

    JTextField quote = new JTextField();
    quote.requestFocus();

    //JButton button = new JButton(">>");

    JPanel quotePanel = new JPanel();
    quotePanel.setLayout(new BorderLayout());
    quotePanel.add(quote, BorderLayout.CENTER);
    //quotePanel.add(button, BorderLayout.EAST);

    JTextArea result = new JTextArea();
    result.setEditable(false);

    JScrollPane resultPane = new JScrollPane();
    resultPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    resultPane.setViewportView(result);

    JPanel panel = new JPanel();
    panel.setLayout(new BorderLayout());
    panel.add(quotePanel, BorderLayout.NORTH);
    panel.add(resultPane, BorderLayout.CENTER);

    c.add(panel, BorderLayout.CENTER);

    list.addListSelectionListener(this);
    //button.addActionListener(this);
    quote.addKeyListener(this);

    this.result = result;
}

---

From source file:org.yccheok.jstock.gui.Utils.java

/**
 * Adjust popup for combo box, so that horizontal scrollbar will not display.
 * http://forums.oracle.com/forums/thread.jspa?messageID=8037483&#8037483
 * http://www.camick.com/java/source/BoundsPopupMenuListener.java
 *
 * Update : According to https://forums.oracle.com/forums/thread.jspa?messageID=9789603#9789603
 * , the above techniques is longer workable.
 * =========================================================================
 * 6u25 changed when popupMenuWillBecomeVisible is called: it is now called 
 * before the list is created so you can add items in that method and still 
 * have the list size correctly.//from   ww w  .j  a  v a  2s  .  c om
 * See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4743225
 * So for your workaround: either it isn't needed anymore or you need to add 
 * an extra hierarchy listener to check when the list is actually added.
 * =========================================================================
 * 
 * I use a quick hack from
 * http://javabyexample.wisdomplug.com/java-concepts/34-core-java/59-tips-and-tricks-for-jtree-jlist-and-jcombobox-part-i.html
 * 
 * @param comboBox The combo box
 */
public static void adjustPopupWidth(JComboBox comboBox) {
    if (comboBox.getItemCount() == 0)
        return;
    Object comp = comboBox.getAccessibleContext().getAccessibleChild(0);
    if (!(comp instanceof BasicComboPopup)) {
        return;
    }
    BasicComboPopup popup = (BasicComboPopup) comp;
    JList list = popup.getList();
    JScrollPane scrollPane = getScrollPane(popup);

    // Just to be paranoid enough.
    if (list == null || scrollPane == null) {
        return;
    }

    //  Determine the maximimum width to use:
    //  a) determine the popup preferred width
    //  b) ensure width is not less than the scroll pane width
    int popupWidth = list.getPreferredSize().width + 5 // make sure horizontal scrollbar doesn't appear
            + getScrollBarWidth(comboBox, scrollPane);
    Dimension scrollPaneSize = scrollPane.getPreferredSize();
    //popupWidth = Math.max(popupWidth, scrollPaneSize.width);
    // Use comboBox.getSize(), since we realize under Linux's Java 6u25,
    // After expanding, scrollPane.getPreferredSize() will return expanded
    // size in the 2nd round, although no expand is required.
    popupWidth = Math.max(popupWidth, comboBox.getSize().width);

    //  Adjust the width
    scrollPaneSize.width = popupWidth;
    scrollPane.setPreferredSize(scrollPaneSize);
    scrollPane.setMaximumSize(scrollPaneSize);

    // The above workaround is no longer working. Use the below hack code!
    if (comboBox instanceof JComboBoxPopupAdjustable) {
        ((JComboBoxPopupAdjustable) comboBox).setPopupWidth(popupWidth);
    }
}

---