bundles/org.eclipse.rap.demo/src/org/eclipse/rap/demo/RWTDemo.java - rap/org.eclipse.rap - Git at Google

 /*******************************************************************************
  * Copyright (c) 2002, 2012 Innoopract Informationssysteme GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *    Innoopract Informationssysteme GmbH - initial API and implementation
  *    EclipseSource - ongoing development
  ******************************************************************************/
 package org.eclipse.rap.demo;

 import java.util.ArrayList;

 import org.eclipse.jface.viewers.*;
 import org.eclipse.rwt.graphics.Graphics;
 import org.eclipse.rwt.lifecycle.IEntryPoint;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.SashForm;
 import org.eclipse.swt.events.*;
 import org.eclipse.swt.graphics.Rectangle;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.widgets.*;


 // TODO: Do we still need this demo ?
 public class RWTDemo implements IEntryPoint {

   private static final int ROWS = 40;
   private static final int COLUMNS = 10;
   private Text txtGroupNameSash;
   private Text txtGroupDescriptionSash;
   private Text txtGroupNameTab1;
   private int previousTabSelected = 0;
   private int tabSelected = 0;

   class TreeObject {

     private final String name;
     private TreeParent parent;

     public TreeObject( String name ) {
       this.name = name;
     }

     public String getName() {
       return name;
     }

     public void setParent( TreeParent parent ) {
       this.parent = parent;
     }

     public TreeParent getParent() {
       return parent;
     }

     @Override
     public String toString() {
       return getName();
     }
   }

   class TreeParent extends TreeObject {

     private final ArrayList<TreeObject> children;

     public TreeParent( String name ) {
       super( name );
       children = new ArrayList<TreeObject>();
     }

     public void addChild( TreeObject child ) {
       children.add( child );
       child.setParent( this );
     }

     public void removeChild( TreeObject child ) {
       children.remove( child );
       child.setParent( null );
     }

     public TreeObject[] getChildren() {
       return children.toArray( new TreeObject[ children.size() ] );
     }

     public boolean hasChildren() {
       return children.size() > 0;
     }
   }

   class TreeViewerContentProvider
     implements IStructuredContentProvider, ITreeContentProvider
   {

     private TreeParent invisibleRoot;

     public void inputChanged( Viewer v, Object oldInput, Object newInput ) {
     }

     public void dispose() {
     }

     public Object[] getElements( Object parent ) {
       if( parent instanceof IEntryPoint ) {
         if( invisibleRoot == null ) {
           initialize();
         }
         return getChildren( invisibleRoot );
       }
       return getChildren( parent );
     }

     public Object getParent( Object child ) {
       if( child instanceof TreeObject ) {
         return ( ( TreeObject )child ).getParent();
       }
       return null;
     }

     public Object[] getChildren( Object parent ) {
       if( parent instanceof TreeParent ) {
         return ( ( TreeParent )parent ).getChildren();
       }
       return new Object[ 0 ];
     }

     public boolean hasChildren( Object parent ) {
       if( parent instanceof TreeParent ) {
         return ( ( TreeParent )parent ).hasChildren();
       }
       return false;
     }

     /*
      * We will set up a dummy model to initialize tree heararchy. In a real
      * code, you will connect to a real model and expose its hierarchy.
      */
     private void initialize() {
       TreeObject to1 = new TreeObject( "Leaf 1" );
       TreeObject to2 = new TreeObject( "Leaf 2" );
       TreeObject to3 = new TreeObject( "Leaf 3" );
       TreeParent p1 = new TreeParent( "Parent 1" );
       p1.addChild( to1 );
       p1.addChild( to2 );
       p1.addChild( to3 );
       TreeObject to4 = new TreeObject( "Leaf 4" );
       TreeParent p2 = new TreeParent( "Parent 2" );
       p2.addChild( to4 );
       TreeParent root = new TreeParent( "Root" );
       root.addChild( p1 );
       root.addChild( p2 );
       invisibleRoot = new TreeParent( "" );
       invisibleRoot.addChild( root );
     }
   }


   public int createUI() {
     Display display = new Display();
     final Shell shell = new Shell( display, SWT.SHELL_TRIM );
     shell.setBounds( 10, 10, 800, 600 );

     createMenu( shell );

     final ToolBar toolBar = new ToolBar( shell, SWT.FLAT );
     ToolItem item1 = new ToolItem( toolBar, SWT.PUSH );
     item1.setText( "new" );

     ToolItem item2 = new ToolItem( toolBar, SWT.PUSH );
     item2.setText( "open" );
     item2.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event ) {
         createShell2( shell.getDisplay() );
       }
     } );

     ToolItem item3 = new ToolItem( toolBar, SWT.PUSH );
     item3.setText( "save as" );

     ToolItem item4 = new ToolItem( toolBar, SWT.PUSH );
     item4.setText( "print" );

     ClassLoader loader = getClass().getClassLoader();
     item1.setImage( Graphics.getImage( "resources/newfile_wiz.gif", loader ) );
     item2.setImage( Graphics.getImage( "resources/newfolder_wiz.gif", loader ) );
     item3.setImage( Graphics.getImage( "resources/newprj_wiz.gif", loader ) );
     item4.setImage( Graphics.getImage( "resources/search_src.gif", loader ) );

     final Composite content = new Composite( shell, SWT.NONE );
     content.setLayout( new FillLayout() );
     layoutShell( shell, toolBar, content );


     SashForm sashForm = new SashForm( content, SWT.HORIZONTAL );
     Composite left = new Composite( sashForm, SWT.NONE );
     Composite right = new Composite( sashForm, SWT.NONE );
     sashForm.setWeights( new int[]{
       25,
       75
     } );
     left.setLayout( new FormLayout() );
     TreeViewer viewer = new TreeViewer( left );
     viewer.setContentProvider( new TreeViewerContentProvider() );
     viewer.setInput( this );
 //    Tree tree = new Tree( left, SWT.NONE );
     Tree tree = viewer.getTree();
     FormData treeData = new FormData();
     tree.setLayoutData( treeData );
     treeData.top = new FormAttachment( 0, 2 );
     treeData.left = new FormAttachment( 0, 2 );
     treeData.right = new FormAttachment( 100, -2 );
     treeData.bottom = new FormAttachment( 100, -2 );
     tree.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event ) {
         Item item = ( Item )event.item;
         txtGroupNameTab1.setText( "treeItem selected: " + item.getText() );
       }
     } );
 //    TreeItem item1 = new TreeItem( tree, SWT.NONE );
 //    item1.setText( "item 1" );
 //    TreeItem item2 = new TreeItem( tree, SWT.NONE );
 //    item2.setText( "item 2" );
 //    TreeItem item2sub1 = new TreeItem( item2, SWT.NONE );
 //    item2sub1.setText( "subItem1" );
     right.setLayout( new FillLayout() );
     SashForm sashFormVertical = new SashForm( right, SWT.VERTICAL );
     Composite top = new Composite( sashFormVertical, SWT.NONE );
     Composite down = new Composite( sashFormVertical, SWT.NONE );
     sashFormVertical.setWeights( new int[]{
       60, 40
     } );
     top.setLayout( new FillLayout() );
     down.setLayout( new FillLayout() );
     final TabFolder topFolder = new TabFolder( top, SWT.NONE );
     TabFolder downFolder = new TabFolder( down, SWT.NONE );
     createTab1( topFolder );
     createTab2( topFolder );
     createTab3( topFolder );
     createTab4( downFolder );
     topFolder.setSelection( 0 );
     downFolder.setSelection( 0 );
     topFolder.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event ) {
         previousTabSelected = tabSelected;
         tabSelected = ( ( TabFolder )event.getSource() ).getSelectionIndex();
         TabItem item = topFolder.getItem( previousTabSelected );
         txtGroupNameSash.setText( "The previous tab you visited was: "
                                   + item.getText() );
       }
     } );
     content.layout();
     shell.addControlListener( new ControlAdapter() {
       @Override
       public void controlResized( final ControlEvent event ) {
         layoutShell( shell, toolBar, content );
       }
     } );
     shell.setText( "SWT Demo" );
     shell.open();
     while( !shell.isDisposed() ) {
       if( !display.readAndDispatch() ) {
         display.sleep();
       }
     }
     return 0;
   }

   private void layoutShell( final Shell shell,
                             final ToolBar toolBar,
                             final Composite content )
   {
     Rectangle clientArea = shell.getClientArea();
     int toolBarHeight = 30;
     toolBar.setBounds( clientArea.x,
                        clientArea.y,
                        clientArea.width,
                        toolBarHeight );
     content.setBounds( clientArea.x,
                        clientArea.y + toolBarHeight + 1,
                        clientArea.width,
                        clientArea.height - toolBarHeight - 1 );
     content.layout();
   }

   private void createMenu( final Shell shell ) {
     final Menu menuBar = new Menu( shell, SWT.BAR );
     shell.setMenuBar( menuBar );
     MenuItem fileMenuItem = new MenuItem( menuBar, SWT.CASCADE );
     fileMenuItem.setText( "File" );
     Menu fileMenu = new Menu( shell, SWT.DROP_DOWN );
     fileMenuItem.setMenu( fileMenu );
     MenuItem openItem = new MenuItem( fileMenu, SWT.PUSH );
     openItem.setText( "Open" );
     openItem.addSelectionListener( new SelectionAdapter() {

       @Override
       public void widgetSelected( final SelectionEvent event ) {
         createShell2( shell.getDisplay() );
       }
     } );
     MenuItem openRecentItem = new MenuItem( fileMenu, SWT.CASCADE );
     openRecentItem.setText( "Open recently used" );
     Menu recentMenu = new Menu( openRecentItem );
     MenuItem recentItem1 = new MenuItem( recentMenu, SWT.PUSH );
     recentItem1.setText( "myfile.txt" );
     openRecentItem.setMenu( recentMenu );
     new MenuItem( fileMenu, SWT.SEPARATOR );
     MenuItem exitItem = new MenuItem( fileMenu, SWT.PUSH );
     exitItem.setText( "Exit" );
   }

   private void createTab1( final TabFolder folder ) {
     TabItem item = new TabItem( folder, SWT.NONE );
     item.setText( "FormLayoutTab" );
     Composite composite = new Composite( folder, SWT.NONE );
     item.setControl( composite );
     composite.setLayout( new FormLayout() );
     Label lblName = new Label( composite, SWT.NONE );
     lblName.setText( "Name" );
     FormData lblNameData = new FormData();
     lblName.setLayoutData( lblNameData );
     lblNameData.top = new FormAttachment( 0, 5 );
     lblNameData.left = new FormAttachment( 0, 5 );
     lblNameData.right = new FormAttachment( 20, 0 );
     lblNameData.bottom = new FormAttachment( 0, 25 );
     txtGroupNameTab1 = new Text( composite, SWT.MULTI | SWT.BORDER );
     txtGroupNameTab1.setText( "" );
     FormData txtGroupNameData = new FormData();
     txtGroupNameTab1.setLayoutData( txtGroupNameData );
     txtGroupNameData.top = new FormAttachment( 0, 5 );
     txtGroupNameData.left = new FormAttachment( lblName, 5 );
     txtGroupNameData.right = new FormAttachment( 100, -5 );
     txtGroupNameData.bottom = new FormAttachment( 0, 25 );
     Label lblDescription = new Label( composite, SWT.NONE );
     lblDescription.setText( "Description" );
     FormData lblDescriptionData = new FormData();
     lblDescription.setLayoutData( lblDescriptionData );
     lblDescriptionData.top = new FormAttachment( lblName, 10 );
     lblDescriptionData.left = new FormAttachment( 0, 5 );
     lblDescriptionData.right = new FormAttachment( 20, 0 );
     Text txtGroupDescription = new Text( composite, SWT.MULTI | SWT.BORDER );
     txtGroupDescription.setText( "Select a TreeItem" );
     FormData txtGroupDescriptionData = new FormData();
     txtGroupDescription.setLayoutData( txtGroupDescriptionData );
     txtGroupDescriptionData.top = new FormAttachment( lblName, 10 );
     txtGroupDescriptionData.left = new FormAttachment( lblDescription, 5 );
     txtGroupDescriptionData.bottom = new FormAttachment( 100, -5 );
     txtGroupDescriptionData.right = new FormAttachment( 100, -5 );
   }

   private void createShell2( final Display display ) {
     Shell shell = new Shell( display, SWT.SHELL_TRIM );
     shell.setLayout( new FillLayout() );
     Composite composite = new Composite( shell, SWT.SHELL_TRIM );
     composite.setLayout( new FillLayout() );
     Label label = new Label( composite, SWT.NONE );
     label.setText( "FillLayout" );
     final Text text = new Text( composite, SWT.MULTI | SWT.BORDER );
     text.setText( "None ASCII characters: äöüß@, select the Sash or press the button" );
     Sash sash = new Sash( composite, SWT.NONE );
     sash.addSelectionListener( new SelectionAdapter() {

       @Override
       public void widgetSelected( SelectionEvent event ) {
         text.setText( "widgetSelected: "
                       + event.getSource()
                       + " bounds: ["
                       + event.x
                       + ", "
                       + event.y
                       + ", "
                       + event.width
                       + ", "
                       + event.height
                       + "]" );
       }
     } );
     Button button = new Button( composite, SWT.NONE );
     button.setText( "Push Me" );
     button.addSelectionListener( new SelectionAdapter() {

       @Override
       public void widgetSelected( final SelectionEvent event ) {
         text.setText( "widgetSelected: "
                       + event.getSource()
                       + " bounds: ["
                       + event.x
                       + ", "
                       + event.y
                       + ", "
                       + event.width
                       + ", "
                       + event.height
                       + "]" );
       }
     } );
     shell.setBounds( 250, 20, 400, 200 );
     shell.layout();
     shell.open();
   }

   private void createTab2( final TabFolder folder ) {
     TabItem item = new TabItem( folder, SWT.NONE );
     item.setText( "SashTab" );
     Composite composite = new Composite( folder, SWT.NONE );
     item.setControl( composite );
     composite.setLayout( new FillLayout() );
     SashForm sashForm = new SashForm( composite, SWT.NONE );
     Composite composite1 = new Composite( sashForm, SWT.NONE );
     Composite composite2 = new Composite( sashForm, SWT.NONE );
     sashForm.setWeights( new int[]{
       25, 75
     } );
     composite1.setLayout( new FormLayout() );
     Text txtLeft = new Text( composite1, SWT.BORDER );
     txtLeft.setText( "This text is on a SashForm" );
     FormData txtLeftData = new FormData();
     txtLeft.setLayoutData( txtLeftData );
     txtLeftData.top = new FormAttachment( 0, 5 );
     txtLeftData.left = new FormAttachment( 0, 5 );
     txtLeftData.right = new FormAttachment( 100, -5 );
     txtLeftData.bottom = new FormAttachment( 100, -5 );
     composite2.setLayout( new FormLayout() );
     Label lblName = new Label( composite2, SWT.NONE );
     lblName.setText( "Name" );
     FormData lblNameData = new FormData();
     lblName.setLayoutData( lblNameData );
     lblNameData.top = new FormAttachment( 0, 5 );
     lblNameData.left = new FormAttachment( 0, 5 );
     lblNameData.right = new FormAttachment( 20, 0 );
     lblNameData.bottom = new FormAttachment( 0, 25 );
     txtGroupNameSash = new Text( composite2, SWT.BORDER );
     txtGroupNameSash.setText( "The previous tab you visited was: " );
     FormData txtGroupNameData = new FormData();
     txtGroupNameSash.setLayoutData( txtGroupNameData );
     txtGroupNameData.top = new FormAttachment( 0, 5 );
     txtGroupNameData.left = new FormAttachment( lblName, 5 );
     txtGroupNameData.right = new FormAttachment( 100, -5 );
     txtGroupNameData.bottom = new FormAttachment( 0, 25 );
     Label lblDescription = new Label( composite2, SWT.NONE );
     lblDescription.setText( "Description" );
     FormData lblDescriptionData = new FormData();
     lblDescription.setLayoutData( lblDescriptionData );
     lblDescriptionData.top = new FormAttachment( lblName, 10 );
     lblDescriptionData.left = new FormAttachment( 0, 5 );
     lblDescriptionData.right = new FormAttachment( 20, 0 );
     txtGroupDescriptionSash = new Text( composite2, SWT.BORDER );
     txtGroupDescriptionSash.setText( "try selecting single or multiple table rows" );
     FormData txtGroupDescriptionData = new FormData();
     txtGroupDescriptionSash.setLayoutData( txtGroupDescriptionData );
     txtGroupDescriptionData.top = new FormAttachment( lblName, 10 );
     txtGroupDescriptionData.left = new FormAttachment( lblDescription, 5 );
     txtGroupDescriptionData.bottom = new FormAttachment( 100, -5 );
     txtGroupDescriptionData.right = new FormAttachment( 100, -5 );
   }

   private void createTab3( final TabFolder folder ) {
     TabItem item = new TabItem( folder, SWT.NONE );
     item.setText( "MoreWidgetsTab" );
     Composite panel = new Composite( folder, SWT.NONE );
     panel.setLayout( new FormLayout() );
     item.setControl( panel );
     Button button = new Button( panel, SWT.NONE );
     button.setText( "Click Me" );
     FormData buttonData = new FormData();
     button.setLayoutData( buttonData );
     buttonData.top = new FormAttachment( 0, 5 );
     buttonData.left = new FormAttachment( 0, 5 );
     buttonData.right = new FormAttachment( 30, 0 );
     buttonData.height = 24;
     // buttonData.bottom = new FormAttachment( 15, 0 );
     Composite radioComp = new Composite( panel, SWT.NONE );
     radioComp.setLayout( new FillLayout() );
     Button radio1 = new Button( radioComp, SWT.RADIO );
     radio1.setText( "choice one" );
     Button radio2 = new Button( radioComp, SWT.RADIO );
     radio2.setText( "choice two" );
     FormData radioCompData = new FormData();
     radioComp.setLayoutData( radioCompData );
     radioCompData.top = new FormAttachment( 0, 5 );
     radioCompData.left = new FormAttachment( button, 15 );
     radioCompData.right = new FormAttachment( 70, -15 );
     radioCompData.height = 24;
     // radioCompData.bottom = new FormAttachment( 15, 0 );
     Button checkButton = new Button( panel, SWT.CHECK );
     checkButton.setText( "check me." );
     FormData checkButtonData = new FormData();
     checkButton.setLayoutData( checkButtonData );
     checkButtonData.top = new FormAttachment( 0, 5 );
     checkButtonData.left = new FormAttachment( radioComp, 5 );
     checkButtonData.right = new FormAttachment( 100, -5 );
     checkButtonData.height = 24;
     Combo combo = new Combo( panel, SWT.NONE );
     combo.add( "selectItem1" );
     combo.add( "selectItem2" );
     combo.add( "selectItem3" );
     FormData comboData = new FormData();
     combo.setLayoutData( comboData );
     comboData.top = new FormAttachment( button, 15 );
     comboData.left = new FormAttachment( 0, 5 );
     comboData.right = new FormAttachment( 30, 0 );
     comboData.height = 24;
     List list = new List( panel, SWT.MULTI | SWT.BORDER );
     list.add( "Selection1" );
     list.add( "Selection2" );
     list.add( "Selection3" );
     list.add( "Selection4" );
     list.add( "Selection5" );
     list.add( "Selection6" );
     list.setToolTipText( "I'm a list" );
     list.addSelectionListener( new SelectionAdapter() {

       @Override
       public void widgetSelected( SelectionEvent e ) {
         List list = ( List )e.getSource();
         String selected = "";
         int[] selectionIndices = list.getSelectionIndices();
         for( int i = 0; i < selectionIndices.length; i++ ) {
           selected += selectionIndices[ i ] + " ";
         }
         System.out.println( selected );
       }
     } );
     FormData listData = new FormData();
     list.setLayoutData( listData );
     listData.top = new FormAttachment( combo, 15 );
     listData.left = new FormAttachment( 0, 5 );
     listData.right = new FormAttachment( 30, 0 );
     listData.height = 96;
   }

   private void createTab4( final TabFolder folder ) {
     TabItem item = new TabItem( folder, SWT.NONE );
     item.setText( "TableTab" );
     Composite composite = new Composite( folder, SWT.NONE );
     item.setControl( composite );
     composite.setLayout( new FormLayout() );
     final Table table = new Table( composite, SWT.NONE );
     FormData formData = new FormData();
     table.setLayoutData( formData );
     formData.top = new FormAttachment( 0, 5 );
     formData.left = new FormAttachment( 0, 5 );
     formData.right = new FormAttachment( 100, -5 );
     formData.bottom = new FormAttachment( 100, -5 );
     for( int i = 0; i < COLUMNS; i++ ) {
       TableColumn tableColumn = new TableColumn( table, SWT.NONE );
       tableColumn.setText( "Column" + i );
       if( i == 2 ) {
         tableColumn.setWidth( 190 );
       } else {
         tableColumn.setWidth( 70 );
       }
     }
     for( int i = 0; i < ROWS; i++ ) {
       TableItem tableItem = new TableItem( table, SWT.NONE );
       for( int j = 0; j < COLUMNS; j++ ) {
         tableItem.setText( j, "Item" + i + "-" + j );
       }
     }
     table.setSelection( 0 );
     table.addSelectionListener( new SelectionAdapter() {

       @Override
       public void widgetSelected( final SelectionEvent event ) {
         String selected = "";
         int[] selectionIndices = table.getSelectionIndices();
         for( int i = 0; i < selectionIndices.length; i++ ) {
           selected += selectionIndices[ i ] + " ";
         }
         System.out.println( selected );
         txtGroupDescriptionSash.setText( "Indices of selected tableRows are: "
                                          + selected );
       }
     } );
   }
 }
	/*******************************************************************************
	* Copyright (c) 2002, 2012 Innoopract Informationssysteme GmbH and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Innoopract Informationssysteme GmbH - initial API and implementation
	* EclipseSource - ongoing development
	******************************************************************************/
	package org.eclipse.rap.demo;

	import java.util.ArrayList;

	import org.eclipse.jface.viewers.*;
	import org.eclipse.rwt.graphics.Graphics;
	import org.eclipse.rwt.lifecycle.IEntryPoint;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.SashForm;
	import org.eclipse.swt.events.*;
	import org.eclipse.swt.graphics.Rectangle;
	import org.eclipse.swt.layout.*;
	import org.eclipse.swt.widgets.*;


	// TODO: Do we still need this demo ?
	public class RWTDemo implements IEntryPoint {

	private static final int ROWS = 40;
	private static final int COLUMNS = 10;
	private Text txtGroupNameSash;
	private Text txtGroupDescriptionSash;
	private Text txtGroupNameTab1;
	private int previousTabSelected = 0;
	private int tabSelected = 0;

	class TreeObject {

	private final String name;
	private TreeParent parent;

	public TreeObject( String name ) {
	this.name = name;
	}

	public String getName() {
	return name;
	}

	public void setParent( TreeParent parent ) {
	this.parent = parent;
	}

	public TreeParent getParent() {
	return parent;
	}

	@Override
	public String toString() {
	return getName();
	}
	}

	class TreeParent extends TreeObject {

	private final ArrayList<TreeObject> children;

	public TreeParent( String name ) {
	super( name );
	children = new ArrayList<TreeObject>();
	}

	public void addChild( TreeObject child ) {
	children.add( child );
	child.setParent( this );
	}

	public void removeChild( TreeObject child ) {
	children.remove( child );
	child.setParent( null );
	}

	public TreeObject[] getChildren() {
	return children.toArray( new TreeObject[ children.size() ] );
	}

	public boolean hasChildren() {
	return children.size() > 0;
	}
	}

	class TreeViewerContentProvider
	implements IStructuredContentProvider, ITreeContentProvider
	{

	private TreeParent invisibleRoot;

	public void inputChanged( Viewer v, Object oldInput, Object newInput ) {
	}

	public void dispose() {
	}

	public Object[] getElements( Object parent ) {
	if( parent instanceof IEntryPoint ) {
	if( invisibleRoot == null ) {
	initialize();
	}
	return getChildren( invisibleRoot );
	}
	return getChildren( parent );
	}

	public Object getParent( Object child ) {
	if( child instanceof TreeObject ) {
	return ( ( TreeObject )child ).getParent();
	}
	return null;
	}

	public Object[] getChildren( Object parent ) {
	if( parent instanceof TreeParent ) {
	return ( ( TreeParent )parent ).getChildren();
	}
	return new Object[ 0 ];
	}

	public boolean hasChildren( Object parent ) {
	if( parent instanceof TreeParent ) {
	return ( ( TreeParent )parent ).hasChildren();
	}
	return false;
	}

	/*
	* We will set up a dummy model to initialize tree heararchy. In a real
	* code, you will connect to a real model and expose its hierarchy.
	*/
	private void initialize() {
	TreeObject to1 = new TreeObject( "Leaf 1" );
	TreeObject to2 = new TreeObject( "Leaf 2" );
	TreeObject to3 = new TreeObject( "Leaf 3" );
	TreeParent p1 = new TreeParent( "Parent 1" );
	p1.addChild( to1 );
	p1.addChild( to2 );
	p1.addChild( to3 );
	TreeObject to4 = new TreeObject( "Leaf 4" );
	TreeParent p2 = new TreeParent( "Parent 2" );
	p2.addChild( to4 );
	TreeParent root = new TreeParent( "Root" );
	root.addChild( p1 );
	root.addChild( p2 );
	invisibleRoot = new TreeParent( "" );
	invisibleRoot.addChild( root );
	}
	}


	public int createUI() {
	Display display = new Display();
	final Shell shell = new Shell( display, SWT.SHELL_TRIM );
	shell.setBounds( 10, 10, 800, 600 );

	createMenu( shell );

	final ToolBar toolBar = new ToolBar( shell, SWT.FLAT );
	ToolItem item1 = new ToolItem( toolBar, SWT.PUSH );
	item1.setText( "new" );

	ToolItem item2 = new ToolItem( toolBar, SWT.PUSH );
	item2.setText( "open" );
	item2.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event ) {
	createShell2( shell.getDisplay() );
	}
	} );

	ToolItem item3 = new ToolItem( toolBar, SWT.PUSH );
	item3.setText( "save as" );

	ToolItem item4 = new ToolItem( toolBar, SWT.PUSH );
	item4.setText( "print" );

	ClassLoader loader = getClass().getClassLoader();
	item1.setImage( Graphics.getImage( "resources/newfile_wiz.gif", loader ) );
	item2.setImage( Graphics.getImage( "resources/newfolder_wiz.gif", loader ) );
	item3.setImage( Graphics.getImage( "resources/newprj_wiz.gif", loader ) );
	item4.setImage( Graphics.getImage( "resources/search_src.gif", loader ) );

	final Composite content = new Composite( shell, SWT.NONE );
	content.setLayout( new FillLayout() );
	layoutShell( shell, toolBar, content );


	SashForm sashForm = new SashForm( content, SWT.HORIZONTAL );
	Composite left = new Composite( sashForm, SWT.NONE );
	Composite right = new Composite( sashForm, SWT.NONE );
	sashForm.setWeights( new int[]{
	25,
	75
	} );
	left.setLayout( new FormLayout() );
	TreeViewer viewer = new TreeViewer( left );
	viewer.setContentProvider( new TreeViewerContentProvider() );
	viewer.setInput( this );
	// Tree tree = new Tree( left, SWT.NONE );
	Tree tree = viewer.getTree();
	FormData treeData = new FormData();
	tree.setLayoutData( treeData );
	treeData.top = new FormAttachment( 0, 2 );
	treeData.left = new FormAttachment( 0, 2 );
	treeData.right = new FormAttachment( 100, -2 );
	treeData.bottom = new FormAttachment( 100, -2 );
	tree.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event ) {
	Item item = ( Item )event.item;
	txtGroupNameTab1.setText( "treeItem selected: " + item.getText() );
	}
	} );
	// TreeItem item1 = new TreeItem( tree, SWT.NONE );
	// item1.setText( "item 1" );
	// TreeItem item2 = new TreeItem( tree, SWT.NONE );
	// item2.setText( "item 2" );
	// TreeItem item2sub1 = new TreeItem( item2, SWT.NONE );
	// item2sub1.setText( "subItem1" );
	right.setLayout( new FillLayout() );
	SashForm sashFormVertical = new SashForm( right, SWT.VERTICAL );
	Composite top = new Composite( sashFormVertical, SWT.NONE );
	Composite down = new Composite( sashFormVertical, SWT.NONE );
	sashFormVertical.setWeights( new int[]{
	60, 40
	} );
	top.setLayout( new FillLayout() );
	down.setLayout( new FillLayout() );
	final TabFolder topFolder = new TabFolder( top, SWT.NONE );
	TabFolder downFolder = new TabFolder( down, SWT.NONE );
	createTab1( topFolder );
	createTab2( topFolder );
	createTab3( topFolder );
	createTab4( downFolder );
	topFolder.setSelection( 0 );
	downFolder.setSelection( 0 );
	topFolder.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event ) {
	previousTabSelected = tabSelected;
	tabSelected = ( ( TabFolder )event.getSource() ).getSelectionIndex();
	TabItem item = topFolder.getItem( previousTabSelected );
	txtGroupNameSash.setText( "The previous tab you visited was: "
	+ item.getText() );
	}
	} );
	content.layout();
	shell.addControlListener( new ControlAdapter() {
	@Override
	public void controlResized( final ControlEvent event ) {
	layoutShell( shell, toolBar, content );
	}
	} );
	shell.setText( "SWT Demo" );
	shell.open();
	while( !shell.isDisposed() ) {
	if( !display.readAndDispatch() ) {
	display.sleep();
	}
	}
	return 0;
	}

	private void layoutShell( final Shell shell,
	final ToolBar toolBar,
	final Composite content )
	{
	Rectangle clientArea = shell.getClientArea();
	int toolBarHeight = 30;
	toolBar.setBounds( clientArea.x,
	clientArea.y,
	clientArea.width,
	toolBarHeight );
	content.setBounds( clientArea.x,
	clientArea.y + toolBarHeight + 1,
	clientArea.width,
	clientArea.height - toolBarHeight - 1 );
	content.layout();
	}

	private void createMenu( final Shell shell ) {
	final Menu menuBar = new Menu( shell, SWT.BAR );
	shell.setMenuBar( menuBar );
	MenuItem fileMenuItem = new MenuItem( menuBar, SWT.CASCADE );
	fileMenuItem.setText( "File" );
	Menu fileMenu = new Menu( shell, SWT.DROP_DOWN );
	fileMenuItem.setMenu( fileMenu );
	MenuItem openItem = new MenuItem( fileMenu, SWT.PUSH );
	openItem.setText( "Open" );
	openItem.addSelectionListener( new SelectionAdapter() {

	@Override
	public void widgetSelected( final SelectionEvent event ) {
	createShell2( shell.getDisplay() );
	}
	} );
	MenuItem openRecentItem = new MenuItem( fileMenu, SWT.CASCADE );
	openRecentItem.setText( "Open recently used" );
	Menu recentMenu = new Menu( openRecentItem );
	MenuItem recentItem1 = new MenuItem( recentMenu, SWT.PUSH );
	recentItem1.setText( "myfile.txt" );
	openRecentItem.setMenu( recentMenu );
	new MenuItem( fileMenu, SWT.SEPARATOR );
	MenuItem exitItem = new MenuItem( fileMenu, SWT.PUSH );
	exitItem.setText( "Exit" );
	}

	private void createTab1( final TabFolder folder ) {
	TabItem item = new TabItem( folder, SWT.NONE );
	item.setText( "FormLayoutTab" );
	Composite composite = new Composite( folder, SWT.NONE );
	item.setControl( composite );
	composite.setLayout( new FormLayout() );
	Label lblName = new Label( composite, SWT.NONE );
	lblName.setText( "Name" );
	FormData lblNameData = new FormData();
	lblName.setLayoutData( lblNameData );
	lblNameData.top = new FormAttachment( 0, 5 );
	lblNameData.left = new FormAttachment( 0, 5 );
	lblNameData.right = new FormAttachment( 20, 0 );
	lblNameData.bottom = new FormAttachment( 0, 25 );
	txtGroupNameTab1 = new Text( composite, SWT.MULTI \| SWT.BORDER );
	txtGroupNameTab1.setText( "" );
	FormData txtGroupNameData = new FormData();
	txtGroupNameTab1.setLayoutData( txtGroupNameData );
	txtGroupNameData.top = new FormAttachment( 0, 5 );
	txtGroupNameData.left = new FormAttachment( lblName, 5 );
	txtGroupNameData.right = new FormAttachment( 100, -5 );
	txtGroupNameData.bottom = new FormAttachment( 0, 25 );
	Label lblDescription = new Label( composite, SWT.NONE );
	lblDescription.setText( "Description" );
	FormData lblDescriptionData = new FormData();
	lblDescription.setLayoutData( lblDescriptionData );
	lblDescriptionData.top = new FormAttachment( lblName, 10 );
	lblDescriptionData.left = new FormAttachment( 0, 5 );
	lblDescriptionData.right = new FormAttachment( 20, 0 );
	Text txtGroupDescription = new Text( composite, SWT.MULTI \| SWT.BORDER );
	txtGroupDescription.setText( "Select a TreeItem" );
	FormData txtGroupDescriptionData = new FormData();
	txtGroupDescription.setLayoutData( txtGroupDescriptionData );
	txtGroupDescriptionData.top = new FormAttachment( lblName, 10 );
	txtGroupDescriptionData.left = new FormAttachment( lblDescription, 5 );
	txtGroupDescriptionData.bottom = new FormAttachment( 100, -5 );
	txtGroupDescriptionData.right = new FormAttachment( 100, -5 );
	}

	private void createShell2( final Display display ) {
	Shell shell = new Shell( display, SWT.SHELL_TRIM );
	shell.setLayout( new FillLayout() );
	Composite composite = new Composite( shell, SWT.SHELL_TRIM );
	composite.setLayout( new FillLayout() );
	Label label = new Label( composite, SWT.NONE );
	label.setText( "FillLayout" );
	final Text text = new Text( composite, SWT.MULTI \| SWT.BORDER );
	text.setText( "None ASCII characters: äöüß@, select the Sash or press the button" );
	Sash sash = new Sash( composite, SWT.NONE );
	sash.addSelectionListener( new SelectionAdapter() {

	@Override
	public void widgetSelected( SelectionEvent event ) {
	text.setText( "widgetSelected: "
	+ event.getSource()
	+ " bounds: ["
	+ event.x
	+ ", "
	+ event.y
	+ ", "
	+ event.width
	+ ", "
	+ event.height
	+ "]" );
	}
	} );
	Button button = new Button( composite, SWT.NONE );
	button.setText( "Push Me" );
	button.addSelectionListener( new SelectionAdapter() {

	@Override
	public void widgetSelected( final SelectionEvent event ) {
	text.setText( "widgetSelected: "
	+ event.getSource()
	+ " bounds: ["
	+ event.x
	+ ", "
	+ event.y
	+ ", "
	+ event.width
	+ ", "
	+ event.height
	+ "]" );
	}
	} );
	shell.setBounds( 250, 20, 400, 200 );
	shell.layout();
	shell.open();
	}

	private void createTab2( final TabFolder folder ) {
	TabItem item = new TabItem( folder, SWT.NONE );
	item.setText( "SashTab" );
	Composite composite = new Composite( folder, SWT.NONE );
	item.setControl( composite );
	composite.setLayout( new FillLayout() );
	SashForm sashForm = new SashForm( composite, SWT.NONE );
	Composite composite1 = new Composite( sashForm, SWT.NONE );
	Composite composite2 = new Composite( sashForm, SWT.NONE );
	sashForm.setWeights( new int[]{
	25, 75
	} );
	composite1.setLayout( new FormLayout() );
	Text txtLeft = new Text( composite1, SWT.BORDER );
	txtLeft.setText( "This text is on a SashForm" );
	FormData txtLeftData = new FormData();
	txtLeft.setLayoutData( txtLeftData );
	txtLeftData.top = new FormAttachment( 0, 5 );
	txtLeftData.left = new FormAttachment( 0, 5 );
	txtLeftData.right = new FormAttachment( 100, -5 );
	txtLeftData.bottom = new FormAttachment( 100, -5 );
	composite2.setLayout( new FormLayout() );
	Label lblName = new Label( composite2, SWT.NONE );
	lblName.setText( "Name" );
	FormData lblNameData = new FormData();
	lblName.setLayoutData( lblNameData );
	lblNameData.top = new FormAttachment( 0, 5 );
	lblNameData.left = new FormAttachment( 0, 5 );
	lblNameData.right = new FormAttachment( 20, 0 );
	lblNameData.bottom = new FormAttachment( 0, 25 );
	txtGroupNameSash = new Text( composite2, SWT.BORDER );
	txtGroupNameSash.setText( "The previous tab you visited was: " );
	FormData txtGroupNameData = new FormData();
	txtGroupNameSash.setLayoutData( txtGroupNameData );
	txtGroupNameData.top = new FormAttachment( 0, 5 );
	txtGroupNameData.left = new FormAttachment( lblName, 5 );
	txtGroupNameData.right = new FormAttachment( 100, -5 );
	txtGroupNameData.bottom = new FormAttachment( 0, 25 );
	Label lblDescription = new Label( composite2, SWT.NONE );
	lblDescription.setText( "Description" );
	FormData lblDescriptionData = new FormData();
	lblDescription.setLayoutData( lblDescriptionData );
	lblDescriptionData.top = new FormAttachment( lblName, 10 );
	lblDescriptionData.left = new FormAttachment( 0, 5 );
	lblDescriptionData.right = new FormAttachment( 20, 0 );
	txtGroupDescriptionSash = new Text( composite2, SWT.BORDER );
	txtGroupDescriptionSash.setText( "try selecting single or multiple table rows" );
	FormData txtGroupDescriptionData = new FormData();
	txtGroupDescriptionSash.setLayoutData( txtGroupDescriptionData );
	txtGroupDescriptionData.top = new FormAttachment( lblName, 10 );
	txtGroupDescriptionData.left = new FormAttachment( lblDescription, 5 );
	txtGroupDescriptionData.bottom = new FormAttachment( 100, -5 );
	txtGroupDescriptionData.right = new FormAttachment( 100, -5 );
	}

	private void createTab3( final TabFolder folder ) {
	TabItem item = new TabItem( folder, SWT.NONE );
	item.setText( "MoreWidgetsTab" );
	Composite panel = new Composite( folder, SWT.NONE );
	panel.setLayout( new FormLayout() );
	item.setControl( panel );
	Button button = new Button( panel, SWT.NONE );
	button.setText( "Click Me" );
	FormData buttonData = new FormData();
	button.setLayoutData( buttonData );
	buttonData.top = new FormAttachment( 0, 5 );
	buttonData.left = new FormAttachment( 0, 5 );
	buttonData.right = new FormAttachment( 30, 0 );
	buttonData.height = 24;
	// buttonData.bottom = new FormAttachment( 15, 0 );
	Composite radioComp = new Composite( panel, SWT.NONE );
	radioComp.setLayout( new FillLayout() );
	Button radio1 = new Button( radioComp, SWT.RADIO );
	radio1.setText( "choice one" );
	Button radio2 = new Button( radioComp, SWT.RADIO );
	radio2.setText( "choice two" );
	FormData radioCompData = new FormData();
	radioComp.setLayoutData( radioCompData );
	radioCompData.top = new FormAttachment( 0, 5 );
	radioCompData.left = new FormAttachment( button, 15 );
	radioCompData.right = new FormAttachment( 70, -15 );
	radioCompData.height = 24;
	// radioCompData.bottom = new FormAttachment( 15, 0 );
	Button checkButton = new Button( panel, SWT.CHECK );
	checkButton.setText( "check me." );
	FormData checkButtonData = new FormData();
	checkButton.setLayoutData( checkButtonData );
	checkButtonData.top = new FormAttachment( 0, 5 );
	checkButtonData.left = new FormAttachment( radioComp, 5 );
	checkButtonData.right = new FormAttachment( 100, -5 );
	checkButtonData.height = 24;
	Combo combo = new Combo( panel, SWT.NONE );
	combo.add( "selectItem1" );
	combo.add( "selectItem2" );
	combo.add( "selectItem3" );
	FormData comboData = new FormData();
	combo.setLayoutData( comboData );
	comboData.top = new FormAttachment( button, 15 );
	comboData.left = new FormAttachment( 0, 5 );
	comboData.right = new FormAttachment( 30, 0 );
	comboData.height = 24;
	List list = new List( panel, SWT.MULTI \| SWT.BORDER );
	list.add( "Selection1" );
	list.add( "Selection2" );
	list.add( "Selection3" );
	list.add( "Selection4" );
	list.add( "Selection5" );
	list.add( "Selection6" );
	list.setToolTipText( "I'm a list" );
	list.addSelectionListener( new SelectionAdapter() {

	@Override
	public void widgetSelected( SelectionEvent e ) {
	List list = ( List )e.getSource();
	String selected = "";
	int[] selectionIndices = list.getSelectionIndices();
	for( int i = 0; i < selectionIndices.length; i++ ) {
	selected += selectionIndices[ i ] + " ";
	}
	System.out.println( selected );
	}
	} );
	FormData listData = new FormData();
	list.setLayoutData( listData );
	listData.top = new FormAttachment( combo, 15 );
	listData.left = new FormAttachment( 0, 5 );
	listData.right = new FormAttachment( 30, 0 );
	listData.height = 96;
	}

	private void createTab4( final TabFolder folder ) {
	TabItem item = new TabItem( folder, SWT.NONE );
	item.setText( "TableTab" );
	Composite composite = new Composite( folder, SWT.NONE );
	item.setControl( composite );
	composite.setLayout( new FormLayout() );
	final Table table = new Table( composite, SWT.NONE );
	FormData formData = new FormData();
	table.setLayoutData( formData );
	formData.top = new FormAttachment( 0, 5 );
	formData.left = new FormAttachment( 0, 5 );
	formData.right = new FormAttachment( 100, -5 );
	formData.bottom = new FormAttachment( 100, -5 );
	for( int i = 0; i < COLUMNS; i++ ) {
	TableColumn tableColumn = new TableColumn( table, SWT.NONE );
	tableColumn.setText( "Column" + i );
	if( i == 2 ) {
	tableColumn.setWidth( 190 );
	} else {
	tableColumn.setWidth( 70 );
	}
	}
	for( int i = 0; i < ROWS; i++ ) {
	TableItem tableItem = new TableItem( table, SWT.NONE );
	for( int j = 0; j < COLUMNS; j++ ) {
	tableItem.setText( j, "Item" + i + "-" + j );
	}
	}
	table.setSelection( 0 );
	table.addSelectionListener( new SelectionAdapter() {

	@Override
	public void widgetSelected( final SelectionEvent event ) {
	String selected = "";
	int[] selectionIndices = table.getSelectionIndices();
	for( int i = 0; i < selectionIndices.length; i++ ) {
	selected += selectionIndices[ i ] + " ";
	}
	System.out.println( selected );
	txtGroupDescriptionSash.setText( "Indices of selected tableRows are: "
	+ selected );
	}
	} );
	}
	}