Java Swing Menu addRCMenuMouseListener(final JTextComponent text)

Description

add RC Menu Mouse Listener

License

Open Source License

Declaration

public static void addRCMenuMouseListener(final JTextComponent text) 

Method Source Code

//package com.java2s;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.text.*;

public class Main {
    public static void addRCMenuMouseListener(final JTextComponent text) {
        text.addMouseListener(new MouseAdapter() {
            @Override/*from w  ww. j a v a 2 s  . com*/
            public void mousePressed(MouseEvent e) {
                if (e.isMetaDown() && text.isEnabled()) {
                    text.requestFocus();
                    showRCMenu(text, e);
                }
            }
        });
    }

    private static void showRCMenu(JTextComponent text, MouseEvent e) {
        int selStart = text.getSelectionStart();
        int selEnd = text.getSelectionEnd();

        JPopupMenu rightClickMenu = new JPopupMenu();

        JMenuItem copyMenuItem = new JMenuItem(text.getActionMap().get(DefaultEditorKit.copyAction));

        JMenuItem cutMenuItem = new JMenuItem(text.getActionMap().get(DefaultEditorKit.cutAction));

        JMenuItem pasteMenuItem = new JMenuItem(text.getActionMap().get(DefaultEditorKit.pasteAction));

        JMenuItem selectAllMenuItem = new JMenuItem(text.getActionMap().get(DefaultEditorKit.selectAllAction));

        copyMenuItem.setText("Copy");
        cutMenuItem.setText("Cut");
        pasteMenuItem.setText("Paste");
        selectAllMenuItem.setText("Select All");

        rightClickMenu.add(copyMenuItem);
        rightClickMenu.add(cutMenuItem);
        rightClickMenu.add(pasteMenuItem);
        rightClickMenu.addSeparator();
        rightClickMenu.add(selectAllMenuItem);

        if (text.getText().isEmpty()) {
            copyMenuItem.setEnabled(false);
            selectAllMenuItem.setEnabled(false);
            cutMenuItem.setEnabled(false);
        }

        if (selStart == selEnd) {
            copyMenuItem.setEnabled(false);
            cutMenuItem.setEnabled(false);
        }

        if ((selStart + selEnd) == text.getText().length()) {
            selectAllMenuItem.setEnabled(false);
        }

        if (!text.isEditable()) {
            cutMenuItem.setEnabled(false);
            pasteMenuItem.setEnabled(false);
        }

        rightClickMenu.show(text, e.getX(), e.getY());
    }
}

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