/*
 * IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
 * 
 * http://izpack.org/
 * http://izpack.codehaus.org/
 * 
 * Copyright 2002 Jan Blok
 * 
 * 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.
 */

package com.izforge.izpack.panels;

import com.izforge.izpack.gui.IzPanelLayout;
import com.izforge.izpack.gui.LabelFactory;
import com.izforge.izpack.installer.InstallData;
import com.izforge.izpack.installer.InstallerFrame;
import com.izforge.izpack.installer.IzPanel;
import com.izforge.izpack.installer.ResourceManager;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * The license panel.
 *
 * @author Julien Ponge
 */
public class LicencePanel extends IzPanel implements ActionListener
{

    /**
     *
     */
    private static final long serialVersionUID = 3691043187997552948L;

    /**
     * The license text.
     */
    private String licence;

    /**
     * The radio buttons.
     */
    private JRadioButton yesRadio;
    private JRadioButton noRadio;

    /**
     * The constructor.
     *
     * @param parent The parent window.
     * @param idata  The installation data.
     */
    public LicencePanel(InstallerFrame parent, InstallData idata)
    {
        super(parent, idata, new IzPanelLayout());
        // We load the licence
        loadLicence();

        // We put our components

        add(LabelFactory.create(parent.langpack.getString("LicencePanel.info"),
                parent.icons.getImageIcon("history"), LEADING), NEXT_LINE);
        JTextArea textArea = new JTextArea(licence);
        textArea.setCaretPosition(0);
        textArea.setEditable(false);
        textArea.setLineWrap(true);
        textArea.setWrapStyleWord(true);
        JScrollPane scroller = new JScrollPane(textArea);
        scroller.setAlignmentX(LEFT_ALIGNMENT);
        add(scroller, NEXT_LINE);

        ButtonGroup group = new ButtonGroup();

        yesRadio = new JRadioButton(parent.langpack.getString("LicencePanel.agree"), false);
        group.add(yesRadio);
        add(yesRadio, NEXT_LINE);
        yesRadio.addActionListener(this);

        noRadio = new JRadioButton(parent.langpack.getString("LicencePanel.notagree"), true);
        group.add(noRadio);
        add(noRadio, NEXT_LINE);
        noRadio.addActionListener(this);

        setInitialFocus(noRadio);
        getLayoutHelper().completeLayout();
    }

    /**
     * Loads the licence text.
     */
    private void loadLicence()
    {
        try
        {
            // We read it
            String resNamePrifix = "LicencePanel.licence";
            licence = ResourceManager.getInstance().getTextResource(resNamePrifix);
        }
        catch (Exception err)
        {
            licence = "Error : could not load the licence text !";
        }
    }

    /**
     * Actions-handling method (here it allows the installation).
     *
     * @param e The event.
     */
    public void actionPerformed(ActionEvent e)
    {
        if (yesRadio.isSelected())
        {
            parent.unlockNextButton();
        }
        else
        {
            parent.lockNextButton();
        }
    }

    /**
     * Indicates wether the panel has been validated or not.
     *
     * @return true if the user has agreed.
     */
    public boolean isValidated()
    {
        if (noRadio.isSelected())
        {
            parent.exit();
            return false;
        }
        return (yesRadio.isSelected());
    }

    /**
     * Called when the panel becomes active.
     */
    public void panelActivate()
    {
        if (!yesRadio.isSelected())
        {
            parent.lockNextButton();
        }
    }
}
