JComboBox的搜索列表 [英] JComboBox search list

问题描述

我w'd喜欢做一个的JComboBox 的内容可以被搜索。
我试图 AutoCompleteDecorator，GlazedLists，的SwingLabs，基德，LAF-的Widget ，但所有的不能用第二个关键词进行搜索。
例如，在此code。通过第一个字母，这可能内容包括搜索只是一个字。

I w'd like make a JComboBox that contents could be searchable. I tried AutoCompleteDecorator, GlazedLists, SwingLabs, JIDE, Laf-Widget, but all of the cannot search by second keyword. For example, in this code possible search by 1st letter and this content includes just one word.

this.comboBox = new JComboBox(new Object[] { "Ester", "Jordi", "Jordina", "Jorge", "Sergi" });
AutoCompleteDecorator.decorate(this.comboBox);

如果的JComboBox 内容包括2个或3个字，例如：酯尔迪或豪尔赫·塞尔吉，在这种情况下，如果我输入塞吉，的JComboBox 没有什么表现，因为它可以用第一个字辨认。
我w'd想问一下有没有有什么办法解决这个问题？

If JComboBox content consists 2 or 3 words, for example: "Ester Jordi" or "Jorge Sergi", in this case if I enter "Sergi", JComboBoxdon't show nothing, because it can recognize by 1st word. I w'd like to ask is there have any way to solve this problem?

推荐答案

我重构给定的code。它可以通过在片段识别。因此，美国英语和英语，当你把英语的认可。

I refactored the given code. It can recognize by the fragment. So "American English" and "English" are recognized when you put "English".

您可以使用FilterComboBox类程序。

You could use the FilterComboBox class in your program.

import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.List;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

/**
 * A class for filtered combo box.
 */
public class FilterComboBox
    extends JComboBox
{
    /**
     * Entries to the combobox list.
     */
    private List<String> entries;

    public List<String> getEntries()
    {
        return entries;
    }

    public FilterComboBox(List<String> entries)
    {
        super(entries.toArray());
        this.entries = entries  ;
        this.setEditable(true);

        final JTextField textfield =
            (JTextField) this.getEditor().getEditorComponent();

        /**
         * Listen for key presses.
         */
        textfield.addKeyListener(new KeyAdapter()
        {
            public void keyReleased(KeyEvent ke)
            {
                SwingUtilities.invokeLater(new Runnable()
                {
                    public void run()
                    {
                        /**
                         * On key press filter the list.
                         * If there is "text" entered in text field of this combo use that "text" for filtering.
                         */
                        comboFilter(textfield.getText());
                    }
                });
            }
        });

    }

    /**
     * Build a list of entries that match the given filter.
     */
    public void comboFilter(String enteredText)
    {
        List<String> entriesFiltered = new ArrayList<String>();

        for (String entry : getEntries())
        {
            if (entry.toLowerCase().contains(enteredText.toLowerCase()))
            {
                entriesFiltered.add(entry);
            }
        }

        if (entriesFiltered.size() > 0)
        {
            this.setModel(
                    new DefaultComboBoxModel(
                        entriesFiltered.toArray()));
            this.setSelectedItem(enteredText);
            this.showPopup();
        }
        else
        {
            this.hidePopup();
        }
    }
}

请参阅FilterComboBox如何在演示程序。

See how FilterComboBox works in Demo program.

import javax.swing.JFrame;
import java.util.Arrays;

public class Demo
{
    public static void makeUI()
    {
        JFrame frame = new JFrame("Your frame");
        /**
         * Put data to your filtered combobox.
         */
        FilterComboBox fcb = new FilterComboBox(
                Arrays.asList(
                    "",
                    "English", 
                    "French", 
                    "Spanish", 
                    "Japanese",
                    "Chinese",
                    "American English",
                    "Canada French"
                    ));
        /**
         * Set up the frame.
         */
        frame.getContentPane().add(fcb);
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

    public static void main(String[] args) throws Exception
    {
        makeUI();
    }
}

另一种方法，在这里我们使现有组合框来筛选组合框。这是有点装修。

Another approach, where we make existing comboboxes to filtered comboboxes. It is somewhat "decoration".

装饰类。

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

import javax.swing.JComboBox;
import javax.swing.JTextField;
import javax.swing.DefaultComboBoxModel;

import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

/**
 * Makes given combobox editable and filterable.
 */ 
public class JComboBoxDecorator
{
    public static void decorate(final JComboBox jcb, boolean editable)
    {
        List<String> entries = new ArrayList<>();
        for (int i = 0; i < jcb.getItemCount(); i++)
        {
            entries.add((String)jcb.getItemAt(i));
        }

        decorate(jcb, editable, entries);
    }

    public static void decorate(final JComboBox jcb, boolean editable, final List<String> entries)
    {
        jcb.setEditable(editable);
        jcb.setModel(
                    new DefaultComboBoxModel(
                        entries.toArray()));

        final JTextField textField = (JTextField) jcb.getEditor().getEditorComponent();

        textField.addKeyListener(
            new KeyAdapter()
            {
                public void keyReleased(KeyEvent e)
                {
                    SwingUtilities.invokeLater(
                        new Runnable()
                        {
                            public void run()
                            { 
                                comboFilter(textField.getText(), jcb, entries);
                            }
                        }
                    );
                } 
            }
        );
    }

    /**
     * Build a list of entries that match the given filter.
     */
    private static void comboFilter(String enteredText, JComboBox jcb, List<String> entries)
    {
        List<String> entriesFiltered = new ArrayList<String>();

        for (String entry : entries)
        {
            if (entry.toLowerCase().contains(enteredText.toLowerCase()))
            {
                entriesFiltered.add(entry);
            }
        }

        if (entriesFiltered.size() > 0)
        {
            jcb.setModel(
                    new DefaultComboBoxModel(
                        entriesFiltered.toArray()));
            jcb.setSelectedItem(enteredText);
            jcb.showPopup();
        }
        else
        {
            jcb.hidePopup();
        }
    }

}

示范课。

import javax.swing.JFrame;
import java.util.Arrays;
import java.util.List;
import java.util.ArrayList;

import javax.swing.JComboBox;
import javax.swing.JPanel;

public class Demo
{
    public static void makeUI()
    {
        JFrame frame = new JFrame("Demonstration");

        /**
         * List of values for comboboxes.
         */
        List<String> list = Arrays.asList( 
            "",
            "English", 
            "French", 
            "Spanish", 
            "Japanese",
            "Chinese",
            "American English",
            "Canada French"
        );

        List<String> list2 = Arrays.asList( 
            "",
            "Anglais", 
            "Francais", 
            "Espagnol", 
            "Japonais",
            "Chinois",
            "Anglais americain",
            "Canada francais"
        );

        /**
         * Set up the frame.
         */
        JPanel panel = new JPanel();
        frame.add(panel);

        /**
         * Create ordinary comboboxes.
         * These comboboxes represent premade combobox'es. Later in the run-time we make some of them filtered.
         */
        JComboBox<String> jcb1 = new JComboBox<>(list.toArray(new String[0]));
        panel.add(jcb1);

        JComboBox<String> jcb2 = new JComboBox<>();
        panel.add(jcb2);

        JComboBox<String> jcb3 = new JComboBox<>(list2.toArray(new String[0]));
        panel.add(jcb3);

        /**
         * On the run-time we convert second and third combobox'es to filtered combobox'es.
         * The jcb1 combobox is left as it was.
         * For the first decorated combobox supply our entries.
         * For the other put entries from list2.
         */
        JComboBoxDecorator.decorate(jcb2, true, list); 
        JComboBoxDecorator.decorate(jcb3, true); 

        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

    public static void main(String[] args) throws Exception
    {
        makeUI();
    }
}

这篇关于JComboBox的搜索列表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！