| gvSIG desktop 1

/*

 *  $Id: ImgPacksPanel.java,v 1.1 2006/06/14 07:29:07 cesar Exp $

 *  IzPack

 *  Copyright (C) 2001-2004 Julien Ponge, Volker Friedritz

 *

 *  File : ImgPacksPanel.java

 *  Description : A panel to select the packs to install.

 *  Author's email : julien@izforge.com

 *  Author's email : volker.friedritz@gmx.de

 *  Author's Website : http://www.izforge.com

 *  

 *  Portions are Copyright (C) 2002 Marcus Wolschon

 *  Portions are Copyright (C) 2002 Jan Blok (jblok@profdata.nl - PDM - www.profdata.nl)

 *

 *  This program is free software; you can redistribute it and/or

 *  modify it under the terms of the GNU General Public License

 *  as published by the Free Software Foundation; either version 2

 *  of the License, or any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

 */

package com.izforge.izpack.panels;

import java.awt.Component;

import java.awt.Dimension;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.net.URL;

import java.util.ArrayList;

import java.util.Iterator;

import javax.swing.Box;

import javax.swing.ImageIcon;

import javax.swing.JLabel;

import javax.swing.JScrollPane;

import javax.swing.event.ListSelectionEvent;

import com.izforge.izpack.installer.InstallData;

import com.izforge.izpack.installer.InstallerFrame;

import com.izforge.izpack.installer.ResourceManager;

import com.izforge.izpack.util.IoHelper;

/**

 *  The ImgPacks panel class. Allows the packages selection with a small picture

 *  displayed for every pack.

 *  This new version combines the old PacksPanel and the ImgPacksPanel so that

 *  the positive characteristics of both are combined.

 *  This class handles only the layout and some related stuff. Common

 *  stuff are handled by the base class.

 *

 * @author     Julien Ponge

 * @author     Volker Friedritz

 * @author     Klaus Bartz

 */

public class ImgPacksPanel extends PacksPanelBase

{

  /**  The images to display. */

  private ArrayList images;  

  /**  The description scroll. */

  private JScrollPane descriptionScroller;

  /**  The img label. */

  private JLabel imgLabel;

  /**  The current image index. */

  private int index = 0;

  /**  The layout. */

  private GridBagLayout layout;

  /**  The layout constraints. */

  private GridBagConstraints gbConstraints;

  /**

   *  The constructor.

   *

   * @param  parent  The parent window.

   * @param  idata   The installation data.

   */

  public ImgPacksPanel(InstallerFrame parent, InstallData idata)

  {

    super(parent, idata);

  }

  /* (non-Javadoc)

   * @see com.izforge.izpack.panels.PacksPanelBase#createNormalLayout()

   */

  protected void createNormalLayout()

  {

    preLoadImages();

    layout = new GridBagLayout();

    gbConstraints = new GridBagConstraints();

    setLayout(layout);

    // Create constraint for first component as standard constraint.

    parent.buildConstraints(gbConstraints, 0, 0, 1, 1, 0.25, 0.0);

    gbConstraints.insets = new Insets(5, 5, 5, 5);

    gbConstraints.anchor = GridBagConstraints.WEST;

    // Create the info label.

    createLabel( "PacksPanel.info", "preferences", layout, gbConstraints);

    // Create the snap label.

    parent.buildConstraints(gbConstraints, 1, 0, 1, 1, 0.50, 0.0);

    createLabel( "ImgPacksPanel.snap", "tip", layout, gbConstraints);

    // Create packs table with a scroller.

    tableScroller = new JScrollPane();

    parent.buildConstraints(gbConstraints, 0, 1, 1, 2, 0.50, 0.0);

    gbConstraints.fill = GridBagConstraints.BOTH;

    packsTable = createPacksTable(250, tableScroller, layout, gbConstraints );

    // Create the image label with a scroller.

    imgLabel = new JLabel((ImageIcon) images.get(0));

    JScrollPane imgScroller = new JScrollPane(imgLabel);

    imgScroller.setPreferredSize(getPreferredSizeFromImages());

    parent.buildConstraints(gbConstraints, 1, 1, 1, 1, 0.5, 1.0);

    layout.addLayoutComponent(imgScroller, gbConstraints);

    add(imgScroller);

    // Create a vertical strut.

    Component strut = Box.createVerticalStrut(20);

    parent.buildConstraints(gbConstraints, 1, 2, 1, 3, 0.0, 0.0);

    layout.addLayoutComponent(strut, gbConstraints);

    add(strut);

    // Create the dependency area with a scroller.

    if( dependenciesExist )

    {

      JScrollPane depScroller = new JScrollPane();

      depScroller.setPreferredSize(new Dimension(250, 40));

      parent.buildConstraints(gbConstraints, 0, 3, 1, 1, 0.50, 0.50);

      dependencyArea = createTextArea("ImgPacksPanel.dependencyList",

        depScroller, layout, gbConstraints  );

    }

    // Create the description area with a scroller.

    descriptionScroller = new JScrollPane();

    descriptionScroller.setPreferredSize(new Dimension(200, 60));

    parent.buildConstraints(gbConstraints, 1, 3, 1, 1, 0.50, 0.50);

    descriptionArea = createTextArea("PacksPanel.description", 

      descriptionScroller, layout, gbConstraints  );

    // Create the tip label.

    parent.buildConstraints(gbConstraints, 0, 4, 2, 1, 0.0, 0.0);

    createLabel( "PacksPanel.tip", "tip", layout, gbConstraints);

    // Create the space label.

    parent.buildConstraints(gbConstraints, 0, 5, 2, 1, 0.0, 0.0);

    spaceLabel = createPanelWithLabel( "PacksPanel.space", layout, gbConstraints );

    if( IoHelper.supported("getFreeSpace"))

    { // Create the free space label only if free space is supported.

      parent.buildConstraints(gbConstraints, 0, 6, 2, 1, 0.0, 0.0);

      freeSpaceLabel = createPanelWithLabel( "PacksPanel.freespace", layout, gbConstraints );

    }

  }

  /**  Pre-loads the images.  */

  private void preLoadImages()

  {

    int size = idata.availablePacks.size();

    images = new ArrayList(size);

    for (int i = 0; i < size; i++)

      try

      {

        URL url =

          ResourceManager.getInstance().getURL("ImgPacksPanel.img." + i);

        ImageIcon img = new ImageIcon(url);

        images.add(img);

      } catch (Exception err)

      {

        err.printStackTrace();

      }

  }

  /**  Try to find a good preferredSize for imgScroller by checking all 

   *   loaded images' width and height.

   */

  private Dimension getPreferredSizeFromImages()

  {

    int maxWidth = 80, maxHeight = 60;

    ImageIcon icon;

    for (Iterator it = images.iterator(); it.hasNext(); )

    {

      icon = (ImageIcon) it.next();

      maxWidth = Math.max(maxWidth, icon.getIconWidth());

      maxHeight = Math.max(maxHeight, icon.getIconHeight());

    }

    maxWidth = Math.min(maxWidth + 20, idata.guiPrefs.width - 150);

    maxHeight = Math.min(maxHeight + 20, idata.guiPrefs.height - 150);

    return new Dimension(maxWidth, maxHeight);

  }

  /* (non-Javadoc)

   * @see javax.swing.event.ListSelectionListener#valueChanged(javax.swing.event.ListSelectionEvent)

   */

  public void valueChanged(ListSelectionEvent e)

  {

    super.valueChanged(e);

    int i = packsTable.getSelectedRow();

    if( i >= 0 )

      imgLabel.setIcon((ImageIcon) images.get(i));

  }

}