how to use class in JCombobox?

[borj bersas]

hi guys, how can I use a class in JCombobox?

scenario:

i have a class that creats an autocomplete for jcombobox
and i want it to use in my jcombobox that i added in other JFrame using drag and drop,
these Jframe and the autocomplete/history class are on the same package.

here is the autocomplete class code:

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.swing.AbstractListModel;
import javax.swing.ComboBoxEditor;
import javax.swing.MutableComboBoxModel;
import javax.swing.JTextField;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.*;
import javax.swing.text.BadLocationException;
import javax.swing.text.JTextComponent;
import javax.swing.text.PlainDocument;



public class AutoComplexCombo extends JComboBox {

    public AutoComplexCombo(ArrayList elements) {

        setModel(new FilterableComboBoxModel(elements));
        setEditor(new MyEditor());
        setEditable(true);

    }

    public class FilterableComboBoxModel extends AbstractListModel
    		implements MutableComboBoxModel {

        private List items;
        private Filter filter;
        private List filteredItems;
        private Object selectedItem;

        public FilterableComboBoxModel(List items) {

            this.items = new ArrayList(items);
            filteredItems = new ArrayList(items.size());
            updateFilteredItems();
        }

        public void addElement( Object obj ) {

        	items.add(obj);
        	updateFilteredItems();
        }

        public void removeElement( Object obj ) {

        	items.remove(obj);
        	updateFilteredItems();
        }

        public void removeElementAt(int index) {

        	items.remove(index);
        	updateFilteredItems();
        }

        public void insertElementAt( Object obj, int index ) {}

        public void setFilter(Filter filter) {

            this.filter = filter;
            updateFilteredItems();
        }

        protected void updateFilteredItems() {

            fireIntervalRemoved(this, 0, filteredItems.size());
            filteredItems.clear();

            if (filter == null)
                filteredItems.addAll(items);
            else {
               	for (Iterator iterator = items.iterator(); iterator.hasNext();) {

               	    Object item = iterator.next();

                    if (filter.accept(item))
                        filteredItems.add(item);
                }
            }
            fireIntervalAdded(this, 0, filteredItems.size());
        }

        public int getSize() {
            return filteredItems.size();
        }

        public Object getElementAt(int index) {
            return filteredItems.get(index);
        }

        public Object getSelectedItem() {
            return selectedItem;
        }

        public void setSelectedItem(Object val) {

            if ((selectedItem == null) && (val == null))
                return;

            if ((selectedItem != null) && selectedItem.equals(val))
                return;

            if ((val != null) && val.equals(selectedItem))
                return;

            selectedItem = val;
            fireContentsChanged(this, -1, -1);
        }
    }



    public static interface Filter {
        public boolean accept(Object obj);
    }

    class StartsWithFilter implements Filter {

        public String prefix;
        public StartsWithFilter(String prefix) { this.prefix = prefix; }
        public boolean accept(Object o) { return startsWithIgnoreCase( o.toString(), prefix ); }
        private boolean startsWithIgnoreCase(String str1, String str2) {
            return str1.toUpperCase().startsWith(str2.toUpperCase());
        }
    }

    public class MyEditor implements ComboBoxEditor, DocumentListener, KeyListener, ActionListener {

        public JTextField text;
        private volatile boolean filtering = false;
        private volatile boolean setting = false;

        public MyEditor() {

            text = new JTextField(15);
            text.getDocument().addDocumentListener(this);
//            text.addKeyListener(this);
//            text.addActionListener(this);

        }

        public Component getEditorComponent() { return text; }

        public void setItem(Object item) {

            if(filtering)
                return;

            setting = true;
            String newText = (item == null) ? "" : item.toString();
            text.setText(newText);
            setting = false;
        }

        public Object getItem() {
            return text.getText();
        }

        public void selectAll() { text.selectAll(); }

        public void addActionListener(ActionListener l) {
            text.addActionListener(this);
        }

        public void removeActionListener(ActionListener l) {
            text.removeActionListener(this);
        }

        public void insertUpdate(DocumentEvent e) { handleChange(); }
        public void removeUpdate(DocumentEvent e) { handleChange(); }
        public void changedUpdate(DocumentEvent e) { }

        protected void handleChange() {

            if (setting)
                return;

            filtering = true;

            Filter filter = null;
            if (text.getText().length() > 0)
                filter = new StartsWithFilter(text.getText());

            ((FilterableComboBoxModel) getModel()).setFilter(filter);
            // A bit nasty but it seems to get the popup validated properly
            setPopupVisible(false);
            if (getModel().getSize() > 0) {
                setPopupVisible(true);
            }
            filtering = false;
        }

        private void highlightCompletedText(int start) {
            text.setCaretPosition(text.getText().length());
            text.moveCaretPosition(start);
        }


        private Object lookupItem(String pattern) {
            FilterableComboBoxModel model = (FilterableComboBoxModel) getModel();
            Object selectedItem = model.getSelectedItem();
            // only search for a different item if the currently selected does not match
            if (selectedItem != null && startsWithIgnoreCase(selectedItem.toString(), pattern)) {
                return selectedItem;
            } else {
                // iterate over all items
                for (int i=0, n=model.getSize(); i < n; i++) {
                    Object currentItem = model.getElementAt(i);
                    // current item starts with the pattern?
                    if (startsWithIgnoreCase(currentItem.toString(), pattern)) {
                        return currentItem;
                    }
                }
            }
            // no item starts with the pattern => return null
            return null;
        }

        // checks if str1 starts with str2 - ignores case
        private boolean startsWithIgnoreCase(String str1, String str2) {
            return str1.toUpperCase().startsWith(str2.toUpperCase());
        }

        public void keyTyped(KeyEvent e) {
//            handleChange();
        }

        public void keyPressed(KeyEvent e) {
            handleChange();
        }

        public void keyReleased(KeyEvent e) {
//            handleChange();
        }

        public void actionPerformed(ActionEvent e) {
            handleChange();
        }
    }
}

and here is my drag and drop code with JCombobox:

public class AutoJCombobox extends javax.swing.JFrame {

    /** Creates new form AutoJCombobox */
    public AutoJCombobox() {
        initComponents();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jComboBox1 = new javax.swing.JComboBox();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jComboBox1.setEditable(true);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jComboBox1, 0, 380, Short.MAX_VALUE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(269, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new AutoJCombobox().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JComboBox jComboBox1;
    // End of variables declaration

}

how can i use the class to make the JCombobox autocomplete?
and how can i call the strings of my array?

String Items[]={"read","rearm","reload","box","bow","book"};

[Ulf Dittmer]

If you want the code to use your AutoComplexCombo class, why is it instantiating a standard JComboBox instead?

[Michael Dunn]

do you mean you want to add your comboBox to the netbeans palette (is that what it's called),
then be able to drag/drop it like a normal comboBox.

if so, you're better off in an IDE forum

[borj bersas]

Ulf Dittmer wrote:If you want the code to use your AutoComplexCombo class, why is it instantiating a standard JComboBox instead?

i just found the code here webpage

and i dont know how to use it, i tried cpoy-paste it in my class but it wont run because it has no main

[borj bersas]

Michael Dunn wrote:do you mean you want to add your comboBox to the netbeans palette (is that what it's called),
then be able to drag/drop it like a normal comboBox.

if so, you're better off in an IDE forum

no its not like that, i just want to use its function on my JCombobox

[borj bersas]

any idea?

[Ulf Dittmer]

Line 17 of AutoJCombobox.java uses a standard JComboBox, when it should be using AutoComplexCombo instead.

[borj bersas]

how to add list of items here?
and how to use it?