JCollapsiblePanel.java

// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.plugins.trustosm.gui.dialogs;

import java.awt.GridBagLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;

import org.openstreetmap.josm.tools.GBC;
import org.openstreetmap.josm.tools.ImageProvider;

public class JCollapsiblePanel extends JPanel {

    private boolean expanded;
    JPanel contentPanel_;
    HeaderPanel headerPanel_;

    private class HeaderPanel extends JPanel {
        JLabel title;

        HeaderPanel(String text) {

            setLayout(new GridBagLayout());
            title = new JLabel(text, ImageProvider.get("misc", "minimized"), SwingConstants.LEADING);
            add(title, GBC.eol());

            addMouseListener(new MouseAdapter() {
                @Override
                public void mouseClicked(MouseEvent e) {
                    expanded = !expanded;

                    if (contentPanel_.isShowing()) {
                        contentPanel_.setVisible(false);
                        title.setIcon(ImageProvider.get("misc", "minimized"));
                    } else {
                        contentPanel_.setVisible(true);
                        title.setIcon(ImageProvider.get("misc", "normal"));
                    }
                    validate();

                    headerPanel_.repaint();
                }
            });
        }
    }

    public JCollapsiblePanel(String text, JPanel panel) {
        super(new GridBagLayout());
        expanded = false;
        headerPanel_ = new HeaderPanel(text);
        contentPanel_ = panel;
        add(headerPanel_, GBC.eol());
        add(contentPanel_, GBC.eol());
        contentPanel_.setVisible(false);
    }
}