/*
 * Created on 2 juil. 2003
 * Copyright (C) 2003, 2004, 2005, 2006 Aelitis, All Rights Reserved.
 *
 * 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 (at your option) 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.
 *
 * AELITIS, SAS au capital de 46,603.30 euros
 * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
 *
 */
package org.gudy.azureus2.ui.swt.views;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.SashForm;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.custom.StackLayout;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.internat.MessageText;
import org.gudy.azureus2.core3.logging.LogEvent;
import org.gudy.azureus2.core3.logging.LogIDs;
import org.gudy.azureus2.core3.logging.Logger;
import org.gudy.azureus2.core3.util.*;
import org.gudy.azureus2.pluginsimpl.local.ui.config.ConfigSectionRepository;
import org.gudy.azureus2.ui.swt.ImageRepository;
import org.gudy.azureus2.ui.swt.Messages;
import org.gudy.azureus2.ui.swt.Utils;
import org.gudy.azureus2.ui.swt.plugins.UISWTConfigSection;
import org.gudy.azureus2.ui.swt.views.configsections.*;

import com.aelitis.azureus.core.AzureusCore;

import org.gudy.azureus2.plugins.ui.config.ConfigSection;
import org.gudy.azureus2.plugins.ui.config.ConfigSectionSWT;

/**
 * @author Olivier
 *
 */
public class ConfigView extends AbstractIView {
	private static final LogIDs LOGID = LogIDs.GUI;
  public static final String sSectionPrefix = "ConfigView.section.";
  
  AzureusCore		azureus_core;
  
  Composite cConfig;
  Composite cConfigSection;
  StackLayout layoutConfigSection;
  Label lHeader;
  Font headerFont;
  Font filterFoundFont;
  Tree tree;
  ArrayList pluginSections;

	private Timer filterDelayTimer;
	private String filterText = "";
	private Label lblX;
	private Listener scResizeListener;

  /**
   * Main Initializer
   * 
   * @param _azureus_core
   */
  public 
  ConfigView(
  	AzureusCore		_azureus_core ) 
  {
  	azureus_core	= _azureus_core;
  }

  /* (non-Javadoc)
   * @see org.gudy.azureus2.ui.swt.IView#initialize(org.eclipse.swt.widgets.Composite)
   */
  public void initialize(Composite composite) {
    GridData gridData;
    /*
    /--cConfig-----------------------------------------------------------\
    | ###SashForm#form################################################## |
    | # /--cLeftSide-\ /--cRightSide---------------------------------\ # |
    | # |txtFilter X | | ***cHeader********************************* | # |
    | # | ##tree#### | | * lHeader                                 * | # |
    | # | #        # | | ******************************************* | # |
    | # | #        # | | ###Composite cConfigSection################ | # |
    | # | #        # | | #                                         # | # |
    | # | #        # | | #                                         # | # |
    | # | #        # | | #                                         # | # |
    | # | #        # | | #                                         # | # |
    | # | ########## | | ########################################### | # |
    | # \------------/ \---------------------------------------------/ # |
    | ################################################################## |
    |  [Button]                                                          |
    \--------------------------------------------------------------------/
    */
    try {
      Display d = composite.getDisplay();

      cConfig = new Composite(composite, SWT.NONE);
      GridLayout configLayout = new GridLayout();
      configLayout.marginHeight = 0;
      configLayout.marginWidth = 0;
      cConfig.setLayout(configLayout);
      gridData = new GridData(GridData.FILL_BOTH);
      cConfig.setLayoutData(gridData);
  
      SashForm form = new SashForm(cConfig,SWT.HORIZONTAL);
      gridData = new GridData(GridData.FILL_BOTH);
      form.setLayoutData(gridData);
      
      Composite cLeftSide = new Composite(form, SWT.BORDER);
      gridData = new GridData(GridData.FILL_BOTH);
      cLeftSide.setLayoutData(gridData);
      
      FormLayout layout = new FormLayout();
      cLeftSide.setLayout(layout);
      
      Composite cFilterArea = new Composite(cLeftSide, SWT.NONE);
      cFilterArea.setLayout(new FormLayout());
      
      final Text txtFilter = new Text(cFilterArea, SWT.BORDER);
      final String sFilterText = MessageText.getString("ConfigView.filter");
      txtFilter.setText(sFilterText);
      txtFilter.selectAll();
      txtFilter.addModifyListener(new ModifyListener() {
      	public void modifyText(ModifyEvent e) {
      		filterTree(txtFilter.getText());
      	}
      });
      txtFilter.addMouseListener(new MouseAdapter() {
				public void mouseDown(MouseEvent e) {
					if (txtFilter.getText().equals(sFilterText)) {
						txtFilter.selectAll();
					}
				}
			});
      txtFilter.setFocus();

  		lblX = new Label(cFilterArea, SWT.WRAP);
      Messages.setLanguageTooltip(lblX, "MyTorrentsView.clearFilter.tooltip");
      lblX.setImage(ImageRepository.getImage("smallx-gray"));
      lblX.addMouseListener(new MouseAdapter() {
      	public void mouseUp(MouseEvent e) {
      		txtFilter.setText("");
      	}
      });
      
      Label lblSearch = new Label(cFilterArea, SWT.NONE);
      lblSearch.setImage(ImageRepository.getImage("search"));
  
      tree = new Tree(cLeftSide, SWT.NONE);
      FontData[] fontData = tree.getFont().getFontData();
      fontData[0].setStyle(SWT.BOLD);
      filterFoundFont = new Font(d, fontData);
      
      FormData formData;

      formData = new FormData();
      formData.bottom = new FormAttachment(100, -5);
      formData.left = new FormAttachment(0, 0);
      formData.right = new FormAttachment(100, 0);
      cFilterArea.setLayoutData(formData);
      
      formData = new FormData();
      formData.top = new FormAttachment(0,5);
      formData.left = new FormAttachment(0, 5);
      lblSearch.setLayoutData(formData);

      formData = new FormData();
      formData.top = new FormAttachment(0,5);
      formData.left = new FormAttachment(lblSearch,5);
      formData.right = new FormAttachment(lblX, -3);
      txtFilter.setLayoutData(formData);

      formData = new FormData();
      formData.top = new FormAttachment(0,5);
      formData.right = new FormAttachment(100,-5);
      lblX.setLayoutData(formData);

      formData = new FormData();
      formData.top = new FormAttachment(0, 0);
      formData.left = new FormAttachment(0,0);
      formData.right = new FormAttachment(100,0);
      formData.bottom = new FormAttachment(cFilterArea,-1);
      tree.setLayoutData(formData);
  
      Composite cRightSide = new Composite(form, SWT.NULL);
      configLayout = new GridLayout();
      configLayout.marginHeight = 3;
      configLayout.marginWidth = 0;
      cRightSide.setLayout(configLayout);
  
      // Header
      Composite cHeader = new Composite(cRightSide, SWT.BORDER);
      configLayout = new GridLayout();
      configLayout.marginHeight = 3;
      configLayout.marginWidth = 0;
      cHeader.setLayout(configLayout);
      gridData = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_CENTER);
      cHeader.setLayoutData(gridData);
  
      cHeader.setBackground(d.getSystemColor(SWT.COLOR_LIST_SELECTION));
      cHeader.setForeground(d.getSystemColor(SWT.COLOR_LIST_SELECTION_TEXT));
  
      lHeader = new Label(cHeader, SWT.NULL);
      lHeader.setBackground(d.getSystemColor(SWT.COLOR_LIST_SELECTION));
      lHeader.setForeground(d.getSystemColor(SWT.COLOR_LIST_SELECTION_TEXT));
      fontData = lHeader.getFont().getFontData();
      fontData[0].setStyle(SWT.BOLD);
      int fontHeight = (int)(fontData[0].getHeight() * 1.2);
      fontData[0].setHeight(fontHeight);
      headerFont = new Font(d, fontData);
      lHeader.setFont(headerFont);
      gridData = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_CENTER);
      lHeader.setLayoutData(gridData);
  
      // Config Section
      cConfigSection = new Composite(cRightSide, SWT.NULL);
      layoutConfigSection = new StackLayout();
      cConfigSection.setLayout(layoutConfigSection);
      gridData = new GridData(GridData.FILL_BOTH);
      gridData.horizontalIndent = 2;
      cConfigSection.setLayoutData(gridData);
  
  
      form.setWeights(new int[] {20,80});
  
      tree.addSelectionListener(new SelectionAdapter() {
        public void widgetSelected(SelectionEvent e) {
          Tree tree = (Tree)e.getSource();
          //Check that at least an item is selected
          //OSX lets you select nothing in the tree for example when a child is selected
          //and you close its parent.
          if(tree.getSelection().length > 0)
    	      showSection(tree.getSelection()[0]);
           }
      });
      // Double click = expand/contract branch
      tree.addListener(SWT.DefaultSelection, new Listener() {
        public void handleEvent(Event e) {
            TreeItem item = (TreeItem)e.item;
            if (item != null)
              item.setExpanded(!item.getExpanded());
        }
      });
    } catch (Exception e) {
    	Logger.log(new LogEvent(LOGID, "Error initializing ConfigView", e));
    }

    scResizeListener = new Listener() {
			public void handleEvent(Event event) {
				ScrolledComposite sc = (ScrolledComposite)event.widget;

	      Composite c = (Composite)sc.getContent();
	      if (c != null) {
	      	Point size1 = c.computeSize(sc.getClientArea().width,
							SWT.DEFAULT);
					Point size = c.computeSize(SWT.DEFAULT, size1.y);
	      	sc.setMinSize(size);
	      }
	  		sc.getVerticalBar().setPageIncrement(sc.getSize().y);
			}
		};


    // Add sections
    /** How to add a new section
     * 1) Create a new implementation of ConfigSectionSWT in a new file
     *    (Use the ConfigSectionTMP.java as a template if it's still around)
     * 2) import it into here
     * 3) add it to the internal sections list
     */
    pluginSections = ConfigSectionRepository.getInstance().getList();

    ConfigSection[] internalSections = { new ConfigSectionConnection(),
                                         new ConfigSectionConnectionProxy(),
                                         new ConfigSectionConnectionAdvanced(),
                                         new ConfigSectionConnectionEncryption(),
                                         new ConfigSectionTransfer(azureus_core),
                                         new ConfigSectionTransferAutoSpeedSelect(),
                                         new ConfigSectionTransferAutoSpeed(),
                                         new ConfigSectionTransferAutoSpeedBeta(),
                                         new ConfigSectionTransferLAN(),
                                         new ConfigSectionFile(), 
                                         new ConfigSectionFileMove(),
                                         new ConfigSectionFileTorrents(),
                                         new ConfigSectionFileTorrentsDecoding(),
                                         new ConfigSectionFilePerformance(),
                                         new ConfigSectionInterface(),
                                         new ConfigSectionInterfaceLanguage(),
                                         new ConfigSectionInterfaceStart(),
                                         new ConfigSectionInterfaceDisplay(),
                                         new ConfigSectionInterfaceColor(),
                                         new ConfigSectionInterfaceAlerts(),
                                         new ConfigSectionMode(),
                                         new ConfigSectionIPFilter(azureus_core),
                                         new ConfigSectionPlugins(this, azureus_core),
                                         new ConfigSectionStats(),
                                         new ConfigSectionTracker(azureus_core),
                                         new ConfigSectionTrackerClient(),
                                         new ConfigSectionTrackerServer(azureus_core),
                                         new ConfigSectionSecurity(),
                                         new ConfigSectionSharing(),
                                         new ConfigSectionLogging()
                                        };
    
    pluginSections.addAll(0, Arrays.asList(internalSections));

    for (int i = 0; i < pluginSections.size(); i++) {
   
    	// slip the non-standard "plugins" initialisation inbetween the internal ones
    	// and the plugin ones so plugin ones can be children of it
    	
      boolean	plugin_section = i >= internalSections.length;
      
      ConfigSection section = (ConfigSection)pluginSections.get(i);
      
      if (section instanceof ConfigSectionSWT || section instanceof UISWTConfigSection ) {
        String name;
        try {
          name = section.configSectionGetName();
         } catch (Exception e) {
        	 Logger.log(new LogEvent(LOGID, "A ConfigSection plugin caused an "
							+ "error while trying to call its "
							+ "configSectionGetName function", e));
          name = "Bad Plugin";
        }

         String	section_key = name;
         
         if ( plugin_section ){
         		// if resource exists without prefix then use it as plugins don't
         		// need to start with the prefix
         	
         	if ( !MessageText.keyExists(section_key)){
         		
         		section_key = sSectionPrefix + name;
         	}
         	
         }else{
         	
         	section_key = sSectionPrefix + name;
         }
         
         try {
          TreeItem treeItem;
          String location = section.configSectionGetParentSection();
  
          if (location.equalsIgnoreCase(ConfigSection.SECTION_ROOT))
        	  treeItem = new TreeItem(tree, SWT.NULL);
          else if (location != "") {
        	  TreeItem treeItemFound = findTreeItem(tree, location);
        	  if (treeItemFound != null){
        		  if (location.equalsIgnoreCase(ConfigSection.SECTION_PLUGINS)) {
        			  // Force ordering by name here.
        			  int position = findInsertPointFor(MessageText.getString(section_key), treeItemFound);
        			  if (position == -1) {
        				  treeItem = new TreeItem(treeItemFound, SWT.NULL);
        			  }
        			  else {
        				  treeItem = new TreeItem(treeItemFound, SWT.NULL, position);
        			  }
        		  }
        		  else {
        			  treeItem = new TreeItem(treeItemFound, SWT.NULL);
        		  }
        	  }else{
        		  treeItem = new TreeItem(tree, SWT.NULL);
        	  }
          }else{
        	  treeItem = new TreeItem(tree, SWT.NULL); 
          }
  
          ScrolledComposite sc = new ScrolledComposite(cConfigSection, SWT.H_SCROLL | SWT.V_SCROLL);
          sc.setExpandHorizontal(true);
          sc.setExpandVertical(true);
          sc.setLayoutData(new GridData(GridData.FILL_BOTH));
      		sc.getVerticalBar().setIncrement(16);
      		sc.addListener(SWT.Resize, scResizeListener);
          
          if(i == 0) {
            Composite c;
            if ( section instanceof ConfigSectionSWT ){
          	  
          	  c = ((ConfigSectionSWT)section).configSectionCreate(sc);
          	  
            }else{
   
            	  c = ((UISWTConfigSection)section).configSectionCreate(sc);
            }
            sc.setContent(c);
          }
          
          Messages.setLanguageText(treeItem, section_key);
          treeItem.setData("Panel", sc);
          treeItem.setData("ID", name);
          treeItem.setData("ConfigSectionSWT", section);
          
          // ConfigSectionPlugins is special because it has to handle the
          // PluginConfigModel config pages
          if (section instanceof ConfigSectionPlugins)
          	((ConfigSectionPlugins)section).initPluginSubSections();
        } catch (Exception e) {
        	Logger.log(new LogEvent(LOGID, "ConfigSection plugin '" + name
							+ "' caused an error", e));
        }
      }
    }
    
 


    initSaveButton();

    TreeItem[] items = { tree.getItems()[0] };
    tree.setSelection(items);
    // setSelection doesn't trigger a SelectionListener, so..
    showSection(items[0]);
  }

  /**
	 * @param text
	 */
	protected void filterTree(String text) {
		filterText = text;
		if (filterDelayTimer != null) {
			filterDelayTimer.destroy();
		}
		
		if (lblX != null && !lblX.isDisposed()) {
			Image img = ImageRepository.getImage(filterText.length() > 0 ? "smallx"
					: "smallx-gray");

			lblX.setImage(img);
		}


		filterDelayTimer = new Timer("Filter");
		filterDelayTimer.addEvent(SystemTime.getCurrentTime() + 300,
				new TimerEventPerformer() {
					public void perform(TimerEvent event) {
						filterDelayTimer.destroy();
						filterDelayTimer = null;

						Utils.execSWTThread(new AERunnable() {
							public void runSupport() {
								// TODO Auto-generated method stub
								ArrayList foundItems = new ArrayList();
								TreeItem[] items = tree.getItems();
								try {
									tree.setRedraw(false);
									for (int i = 0; i < items.length; i++) {
										items[i].setExpanded(false);
									}

									filterTree(items, filterText, foundItems);
								} finally {
									tree.setRedraw(true);
								}
							}
						});
					}
				});
	}

	protected void filterTree(TreeItem[] items, String text, ArrayList foundItems)
	{
		text = text.toLowerCase();
		for (int i = 0; i < items.length; i++) {
			ensureSectionBuilt(items[i]);
			ScrolledComposite composite = (ScrolledComposite) items[i].getData("Panel");

			if (text.length() > 0
					&& (items[i].getText().toLowerCase().indexOf(text) >= 0 || compositeHasText(
							composite, text))) {
				foundItems.add(items[i]);

				ensureExpandedTo(items[i]);
				items[i].setFont(filterFoundFont);
			} else {
				items[i].setFont(null);
			}
			filterTree(items[i].getItems(), text, foundItems);
		}
	}
	
	private void ensureExpandedTo(TreeItem item) {
    TreeItem itemParent = item.getParentItem();
  	if (itemParent != null) {
  		itemParent.setExpanded(true);
  		ensureExpandedTo(itemParent);
  	}
	}

	/**
	 * @param composite 
	 * @param text
	 * @return
	 */
	private boolean compositeHasText(Composite composite, String text) {
		Control[] children = composite.getChildren();
		
		for (int i = 0; i < children.length; i++) {
			Control child = children[i];
			if (child instanceof Label) {
				if (((Label)child).getText().toLowerCase().indexOf(text) >= 0) {
					return true;
				}
			} else if (child instanceof Group) {
				if (((Group)child).getText().toLowerCase().indexOf(text) >= 0) {
					return true;
				}
			} else if (child instanceof Button) {
				if (((Button)child).getText().toLowerCase().indexOf(text) >= 0) {
					return true;
				}
			}

			if (child instanceof Composite) {
				if (compositeHasText((Composite) child, text)) {
					return true;
				}
			}
		}
		
		return false;
	}

	private void showSection(TreeItem section) {
    ScrolledComposite item = (ScrolledComposite)section.getData("Panel");

    if (item != null) {
    	
    	ensureSectionBuilt(section);
    	
      layoutConfigSection.topControl = item;
      
//      Composite c = (Composite)item.getContent();
      

      // resize listener will sc.setMinSize
//      System.out.println("show");
//      item.setMinSize(c.computeSize(SWT.DEFAULT, SWT.DEFAULT));
      cConfigSection.layout();
      
      updateHeader(section);
    }
  }
	
	private void ensureSectionBuilt(TreeItem section) {
    ScrolledComposite item = (ScrolledComposite)section.getData("Panel");

    if (item != null) {
    	
      ConfigSection configSection = (ConfigSection)section.getData("ConfigSectionSWT");
      
      if (configSection != null) {
    	  
        Control previous = item.getContent();
        if (previous instanceof Composite) {
        	configSection.configSectionDelete();
          Utils.disposeComposite((Composite)previous,true);
        }
        
        Composite c;
        
        if ( configSection instanceof ConfigSectionSWT ){
      	  
      	  c = ((ConfigSectionSWT)configSection).configSectionCreate(item);
      	  
        }else{

          c = ((UISWTConfigSection)configSection).configSectionCreate(item);
        }
        
        item.setContent(c);
      }
    }
	}

  private void updateHeader(TreeItem section) {
    if (section == null)
      return;

    String sHeader = section.getText();
    section = section.getParentItem();
    while (section != null) {
      sHeader = section.getText() + " : " + sHeader;
      section = section.getParentItem();
    }
    lHeader.setText(" " + sHeader.replaceAll("&", "&&"));
  }


  private Composite createConfigSection(String sNameID) {
    return createConfigSection(null, sNameID, -1, true);
  }

  private Composite createConfigSection(String sNameID, int position) {
    return createConfigSection(null, sNameID, position, true);
  }

  public Composite createConfigSection(TreeItem treeItemParent, 
                                        String sNameID, 
                                        int position, 
                                        boolean bPrefix) {
    ScrolledComposite sc = new ScrolledComposite(cConfigSection, SWT.H_SCROLL | SWT.V_SCROLL);
    sc.setExpandHorizontal(true);
    sc.setExpandVertical(true);
    sc.setLayoutData(new GridData(GridData.FILL_BOTH));
		sc.getVerticalBar().setIncrement(16);
		sc.addListener(SWT.Resize, scResizeListener);

    Composite cConfigSection = new Composite(sc, SWT.NULL);
    
    String section_key = ((bPrefix) ? sSectionPrefix : "") + sNameID;
    
    if (position == -2) { // Means "auto-order".
    	position = findInsertPointFor(MessageText.getString(section_key), (treeItemParent == null) ? (Object)tree : (Object)treeItemParent);
    }

    TreeItem treeItem;
    if (treeItemParent == null) {
      if (position >= 0)
        treeItem = new TreeItem(tree, SWT.NULL, position);
      else
        treeItem = new TreeItem(tree, SWT.NULL);
    } else {
      if (position >= 0)
        treeItem = new TreeItem(treeItemParent, SWT.NULL, position);
      else
        treeItem = new TreeItem(treeItemParent, SWT.NULL);
    }
    Messages.setLanguageText(treeItem, section_key);
    treeItem.setData("Panel", sc);
    treeItem.setData("ID", sNameID);

    sc.setContent(cConfigSection);
    return cConfigSection;
  }
  
  private static Comparator insert_point_comparator = new Comparator() {
	  
	  private String asString(Object o) {
		  if (o instanceof String) {
			  return (String)o;
		  }
		  else if (o instanceof TreeItem) {
			  return ((TreeItem)o).getText();
		  }
		  else {
			  throw new ClassCastException("object is not String or TreeItem: " + o.getClass().getName());
		  }
	  }
	  
	  public int compare(Object o1, Object o2) {
		  int result = String.CASE_INSENSITIVE_ORDER.compare(asString(o1), asString(o2));
		  return result;
	  }
  };
  
  public static int findInsertPointFor(String name, Object structure) {
	  TreeItem[] children = null;
	  if (structure instanceof Tree) {
	      children = ((Tree)structure).getItems();
	  }
	  else {
		  children = ((TreeItem)structure).getItems();
	  }
	  if (children.length == 0) {return -1;}
	  int result =  Arrays.binarySearch(children, name, insert_point_comparator);
	  if (result > 0) {return result;}
	  result = -(result+1);
	  if (result == children.length) {
		  result = -1;
	  }
	  return result;
  }

  public TreeItem findTreeItem(String ID) {
  	return findTreeItem((Tree)null, ID);
  }

  private TreeItem findTreeItem(Tree tree, String ID) {
  	if (tree == null)
  		tree = this.tree;
    TreeItem[] items = tree.getItems();
    for (int i = 0; i < items.length; i++) {
      String itemID = (String)items[i].getData("ID");
      if (itemID != null && itemID.equalsIgnoreCase(ID)) {
        return items[i];
      }
      TreeItem itemFound = findTreeItem(items[i], ID);
      if (itemFound != null)
        return itemFound;
    }
	 return null;
  }

  private TreeItem findTreeItem(TreeItem item, String ID) {
    TreeItem[] subItems = item.getItems();
    for (int i = 0; i < subItems.length; i++) {
      String itemID = (String)subItems[i].getData("ID");
      if (itemID != null && itemID.equalsIgnoreCase(ID)) {
        return subItems[i];
      }

      TreeItem itemFound = findTreeItem(subItems[i], ID);
      if (itemFound != null)
        return itemFound;
    }
    return null;
  }

  private void initSaveButton() {
    GridData gridData;
    final Button save = new Button(cConfig, SWT.PUSH);
    Messages.setLanguageText(save, "ConfigView.button.save"); //$NON-NLS-1$
    gridData = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
    gridData.horizontalSpan = 2;
    gridData.widthHint = 80;
    save.setLayoutData(gridData);

    save.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
				// force focusout on osx
				save.setFocus();
				COConfigurationManager.setParameter("updated", 1);
				COConfigurationManager.save();

				for (int i = 0; i < pluginSections.size(); i++)
					((ConfigSection) pluginSections.get(i)).configSectionSave();
			}
		});
  }

  /* (non-Javadoc)
   * @see org.gudy.azureus2.ui.swt.IView#getComposite()
   */
  public Composite getComposite() {
    return cConfig;
  }

  public void updateLanguage() {
    super.updateLanguage();
    updateHeader(tree.getSelection()[0]);
//    cConfig.setSize(cConfig.computeSize(SWT.DEFAULT, SWT.DEFAULT));
  }

  public void delete() {
    for (int i = 0; i < pluginSections.size(); i++) {
    	try {
    		((ConfigSection)pluginSections.get(i)).configSectionDelete();
    	} catch (Exception e) {
    		Debug.out("Error while deleting config section", e);
    	}
    }
    pluginSections.clear();
    if(! tree.isDisposed()) {
	    TreeItem[] items = tree.getItems();
	    for (int i = 0; i < items.length; i++) {
	      Composite c = (Composite)items[i].getData("Panel");
	      Utils.disposeComposite(c);
	      items[i].setData("Panel", null);
	
	      items[i].setData("ConfigSectionSWT", null);
	    }
    }
    Utils.disposeComposite(cConfig);

  	Utils.disposeSWTObjects(new Object[] { headerFont, filterFoundFont });
		headerFont = null;
		filterFoundFont = null;
  }

  public String getFullTitle() {
    return MessageText.getString("ConfigView.title.full"); //$NON-NLS-1$
  }

  public boolean selectSection(String id) {
		TreeItem ti = findTreeItem(id);
		if (ti == null)
			return false;
		tree.setSelection(new TreeItem[] { ti });
		showSection(ti);
		return true;
	}

  public void
  selectSection(
  	Class	config_section_class )
  {
	  TreeItem[]	items = tree.getItems();
	  
	  for (int i=0;i<items.length;i++){
		  
		  TreeItem	item = items[i];
		  	    	
		  ConfigSection section = (ConfigSection)item.getData("ConfigSectionSWT");
			  
		  if ( section != null && section.getClass() == config_section_class ){
				  
			  tree.setSelection( new TreeItem[]{ item });
			  
			  showSection( item );
			  
			  break;
		  }
	  }
  }
}
