/*******************************************************************************
 * 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 implementation
 ******************************************************************************/

package org.eclipse.rap.demo;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;
import org.eclipse.ui.*;
import org.eclipse.ui.part.ViewPart;


public class DemoSelectionViewPart extends ViewPart {

  private List list;

  @Override
  public void createPartControl( Composite parent ) {
    parent.setLayout( new GridLayout( 1, false ) );
    Label label = new Label( parent, 0 );
    label.setText( "Selection Log" );
    list = new List( parent, SWT.FLAT | SWT.H_SCROLL | SWT.V_SCROLL );
    list.setLayoutData( new GridData( SWT.FILL, SWT.FILL, true, true ) );
    createSelectionListener();
  }

  @Override
  public void setFocus() {
    list.setFocus();
  }

  private void createSelectionListener() {
    IWorkbench workbench = PlatformUI.getWorkbench();
    IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();
    ISelectionService selectionService = window.getSelectionService();
    selectionService.addSelectionListener( new ISelectionListener() {
      public void selectionChanged( IWorkbenchPart part, ISelection selection ) {
        String entry = part.getTitle() + " / ";
        IStructuredSelection sselection = ( IStructuredSelection )selection;
        Object firstElement = sselection.getFirstElement();
        if( firstElement == null ) {
          entry += "null";
        } else {
          if( firstElement instanceof String[] ) {
            entry += "Table count: " + sselection.size();
          } else {
            entry += firstElement.toString();
          }
        }
        if( !list.isDisposed() ) {
          list.add( entry, 0 );
          list.setSelection( 0 );
        }
      }
    } );
  }
}