/*
 * Copyright (c) 2003 JGoodies Karsten Lentzsch. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *  o Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer. 
 *     
 *  o Redistributions in binary form must reproduce the above copyright notice, 
 *    this list of conditions and the following disclaimer in the documentation 
 *    and/or other materials provided with the distribution. 
 *     
 *  o Neither the name of JGoodies Karsten Lentzsch nor the names of 
 *    its contributors may be used to endorse or promote products derived 
 *    from this software without specific prior written permission. 
 *     
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

package com.jgoodies.uif_lite.panel;

import java.awt.*;

import javax.swing.*;
import javax.swing.border.AbstractBorder;

import com.jgoodies.plaf.LookUtils;

/** 
 * A <code>JPanel</code> subclass that has a drop shadow border and 
 * that provides a header with icon, title and tool bar.<p>
 * 
 * This class can be used to replace the <code>JInternalFrame</code>,
 * for use outside of a <code>JDesktopPane</code>. 
 * The <code>SimpleInternalFrame</code> is less flexible but often
 * more usable; it avoids overlapping windows and scales well 
 * up to IDE size.
 * Several customers have reported that they and their clients feel 
 * much better with both the appearance and the UI feel.<p>
 * 
 * The SimpleInternalFrame provides the following bound properties:
 * <i>frameIcon, title, toolBar, content, selected.</i><p>
 * 
 * By default the SimpleInternalFrame is in <i>selected</i> state.
 * If you don't do anything, multiple simple internal frames will
 * be displayed as selected.
 * 
 * @author Karsten Lentzsch
 * @version $Revision: 1.3 $
 * 
 * @see    javax.swing.JInternalFrame
 * @see    javax.swing.JDesktopPane
 */

public class SimpleInternalFrame extends JPanel {

    private JLabel          titleLabel;
    private GradientPanel   gradientPanel;
    private JPanel          headerPanel;
    private boolean        isSelected;
    
    
    // Instance Creation ****************************************************

    /**
     * Constructs a <code>SimpleInternalFrame</code> with the specified title.
     * 
     * @param title       the initial title
     */
    public SimpleInternalFrame(String title) {
        this(null, title, null, null);
    }
    
    
    /**
     * Constructs a <code>SimpleInternalFrame</code> with the specified 
     * icon, and title.
     * 
     * @param icon        the initial icon
     * @param title       the initial title
     */
    public SimpleInternalFrame(Icon icon, String title) {
        this(icon, title, null, null);
    }

    
    /**
     * Constructs a <code>SimpleInternalFrame</code> with the specified 
     * title, tool bar, and content panel.
     * 
     * @param title       the initial title
     * @param bar         the initial tool bar
     * @param content     the initial content pane
     */
    public SimpleInternalFrame(String title, JToolBar bar, JComponent content) {
        this(null, title, bar, content);
    }
    

    /**
     * Constructs a <code>SimpleInternalFrame</code> with the specified 
     * icon, title, tool bar, and content panel.
     * 
     * @param icon        the initial icon
     * @param title       the initial title
     * @param bar         the initial tool bar
     * @param content     the initial content pane
     */
    public SimpleInternalFrame(
        Icon icon,
        String title,
        JToolBar bar,
        JComponent content) {
        super(new BorderLayout());
        this.isSelected = false;
        this.titleLabel = new JLabel(title, icon, SwingConstants.LEADING);
        JPanel top = buildHeader(titleLabel, bar);

        add(top, BorderLayout.NORTH);
        if (content != null) {
            setContent(content);
        }
        setBorder(new ShadowBorder());
        setSelected(true);
        updateHeader();
    }

    
    // Public API ***********************************************************

    /**
     * Returns the frame's icon.
     * 
     * @return the frame's icon
     */
    public Icon getFrameIcon() {
        return titleLabel.getIcon();
    }
    

    /**
     * Sets a new frame icon.
     * 
     * @param newIcon   the icon to be set
     */
    public void setFrameIcon(Icon newIcon) {
        Icon oldIcon = getFrameIcon();
        titleLabel.setIcon(newIcon);
        firePropertyChange("frameIcon", oldIcon, newIcon);
    }
    

    /**
     * Returns the frame's title text.
     * 
     * @return String   the current title text
     */
    public String getTitle() {
        return titleLabel.getText();
    }
    
    
    /**
     * Sets a new title text.
     * 
     * @param newText  the title text tp be set
     */
    public void setTitle(String newText) {
        String oldText = getTitle();
        titleLabel.setText(newText);
        firePropertyChange("title", oldText, newText);
    }
    
    
    /**
     * Returns the current toolbar, null if none has been set before.
     * 
     * @return the current toolbar - if any
     */
    public JToolBar getToolBar() {
        return headerPanel.getComponentCount() > 1
            ? (JToolBar) headerPanel.getComponent(1)
            : null;
    }
    

    /**
     * Sets a new tool bar in the header.
     * 
     * @param newToolBar the tool bar to be set in the header
     */
    public void setToolBar(JToolBar newToolBar) {
        JToolBar oldToolBar = getToolBar();
        if (oldToolBar == newToolBar) {
            return;
        }
        if (oldToolBar != null) {
            headerPanel.remove(oldToolBar);
        }
        if (newToolBar != null) {
            newToolBar.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 0));
            headerPanel.add(newToolBar, BorderLayout.EAST);
        }
        updateHeader();
        firePropertyChange("toolBar", oldToolBar, newToolBar);
    }

    
    /**
     * Returns the content - null, if none has been set.
     * 
     * @return the current content
     */
    public Component getContent() {
        return hasContent() ? getComponent(1) : null;
    }
    
    
    /**
     * Sets a new panel content; replaces any existing content, if existing.
     * 
     * @param newContent   the panel's new content
     */
    public void setContent(Component newContent) {
        Component oldContent = getContent();
        if (hasContent()) {
            remove(oldContent);
        }
        add(newContent, BorderLayout.CENTER);