Java JComboBox Event installComboBoxCopyAction(JComboBox comboBox)

Description

install Combo Box Copy Action

License

Apache License

Declaration

public static void installComboBoxCopyAction(JComboBox comboBox) 

Method Source Code

//package com.java2s;
/*//from w ww. java  2s .  c  om
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import javax.swing.*;

import javax.swing.text.DefaultEditorKit;

import javax.swing.text.JTextComponent;

import java.awt.*;
import java.awt.event.*;

public class Main {
    public static void installComboBoxCopyAction(JComboBox comboBox) {
        final Component editorComponent = comboBox.getEditor().getEditorComponent();
        if (!(editorComponent instanceof JTextComponent))
            return;
        final InputMap inputMap = ((JTextComponent) editorComponent).getInputMap();
        for (KeyStroke keyStroke : inputMap.allKeys()) {
            if (DefaultEditorKit.copyAction.equals(inputMap.get(keyStroke))) {
                comboBox.getInputMap().put(keyStroke, DefaultEditorKit.copyAction);
            }
        }
        comboBox.getActionMap().put(DefaultEditorKit.copyAction, new AbstractAction() {
            @Override
            public void actionPerformed(final ActionEvent e) {
                if (!(e.getSource() instanceof JComboBox))
                    return;
                final JComboBox comboBox = (JComboBox) e.getSource();
                final String text;
                final Object selectedItem = comboBox.getSelectedItem();
                if (selectedItem instanceof String) {
                    text = (String) selectedItem;
                } else {
                    final Component component = comboBox.getRenderer().getListCellRendererComponent(new JList(),
                            selectedItem, 0, false, false);
                    if (component instanceof JLabel) {
                        text = ((JLabel) component).getText();
                    } else if (component != null) {
                        final String str = component.toString();
                        // skip default Component.toString and handle SimpleColoredComponent case
                        text = str == null || str.startsWith(component.getClass().getName() + "[") ? null : str;
                    } else {
                        text = null;
                    }
                }
                if (text != null) {
                    final JTextField textField = new JTextField(text);
                    textField.selectAll();
                    textField.copy();
                }
            }
        });
    }
}

Related

1. addActionListener(ActionListener listener, JComboBox... components)
2. addActionListeners(JComboBox comboBox, ActionListener[] listeners)
3. createComboBox(String actionCommand, ActionListener listener, String... items)
4. createComboBox(TYPE[] items, ActionListener... listeners)
5. setAction(JComboBox cmb, ActionListener listener, String actionCommand)