CODEWITHSUNDEEP
javaswingcheckbox
Goblin Alchemist
Goblin Alchemist

Reputation: 827

Swing: grayable multi-line JCheckBox?

I want to have a checkbox with multi-line text and I want to disable it sometimes.

Is it possible to have a checkbox and its label as separate controls and have some kind of link between them, as in HTML? Probably I would be able to cook something from this.

Is it possible to subclass JButton and override something there, for example, to change the way the focus rectangle is drawn? The rectangle is drawn by com.sun.java.swing.plaf.windows.WindowsButtonUI but I'm kinda afraid of subclassing that class because it's too deep in the standard library and my application may break with a new JRE.

EDIT 04.02.2015: The above applies to Java 1.6. In Java 1.7 and higher, disabling a multi-line checkbox changes its appearance, but it still looks not the same as a disabled single-line checkbox; in particular, on Classic Windows theme the text doesn't become sunken.


(source: keep4u.ru)

Upvotes: 0

Views: 2003

Answers (1)

Gilbert Le Blanc
Gilbert Le Blanc

Reputation: 51445

I might be missing something, but I just disable the JCheckBox and the JLabel.

Using Java 1.7 and Windows Vista.

Enabled Check Box Disabled Check Box

Here's the code

package com.ggl.testing;

import java.awt.BorderLayout;

import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JToggleButton;
import javax.swing.SwingUtilities;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class CheckBoxTest implements Runnable {

    private JCheckBox checkBox;

    private JLabel multiLineLabel;

    private JFrame frame;

    @Override
    public void run() {
        frame = new JFrame("Check Box Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel mainPanel = new JPanel();
        mainPanel.setLayout(new BorderLayout());

        JPanel checkBoxPanel = new JPanel();

        checkBox = new JCheckBox();
        checkBoxPanel.add(checkBox);

        String s = "<html>When in the course of human events it becomes"
                + "<br>necessary for one people to dissolve the political"
                + "<br>bands which have connected them with another and to"
                + "<br>assume among the powers of the earth, the separate"
                + "<br>and equal station to which the Laws of Nature and"
                + "<br>of Nature's God entitle them, a decent respect to the"
                + "<br>opinions of mankind requires that they should declare"
                + "<br>the causes which impel them to the separation.";
        multiLineLabel = new JLabel(s);
        multiLineLabel.setLabelFor(checkBox);
        checkBoxPanel.add(multiLineLabel);

        mainPanel.add(checkBoxPanel, BorderLayout.CENTER);

        JPanel toggleButtonPanel = new JPanel();

        JToggleButton toggleButton = new JToggleButton("Disable Checkbox");
        toggleButton.addChangeListener(new ChangeListener() {
            @Override
            public void stateChanged(ChangeEvent event) {
                JToggleButton toggleButton = (JToggleButton) event.getSource();
                if (toggleButton.isSelected()) {
                    checkBox.setEnabled(false);
                    multiLineLabel.setEnabled(false);
                } else {
                    checkBox.setEnabled(true);
                    multiLineLabel.setEnabled(true);
                }
            }
        });
        toggleButtonPanel.add(toggleButton);

        mainPanel.add(toggleButtonPanel, BorderLayout.SOUTH);

        frame.add(mainPanel);

        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new CheckBoxTest());
    }

}

Upvotes: 1

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