content: package org.flashtool.gui;
  
  import java.io.File;
  import java.util.HashSet;
  import java.util.Vector;
  import org.eclipse.swt.widgets.Dialog;
  import org.eclipse.swt.widgets.Display;
  import org.eclipse.swt.widgets.Event;
  import org.eclipse.swt.widgets.Listener;
  import org.eclipse.swt.widgets.Shell;
  import org.flashtool.system.OS;
  
  import lombok.extern.slf4j.Slf4j;
  
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.layout.FormLayout;
  import org.eclipse.swt.widgets.Button;
  import org.eclipse.swt.layout.FormData;
  import org.eclipse.swt.layout.FormAttachment;
  import org.eclipse.swt.events.SelectionAdapter;
  import org.eclipse.swt.events.SelectionEvent;
  import org.eclipse.swt.graphics.Image;
  import org.eclipse.swt.widgets.List;
  import org.eclipse.jface.viewers.IStructuredContentProvider;
  import org.eclipse.jface.viewers.LabelProvider;
  import org.eclipse.jface.viewers.ListViewer;
  import org.eclipse.jface.viewers.Viewer;
  
  @Slf4j
  public class VariantSelector extends Dialog {
  
  	protected Object result;
  	protected Shell shlVariantSelector;
  	private Button btnCancel;
  	HashSet<String> currentVariant;
  	private List listVariant;
  
  	/**
  	 * Create the dialog.
  	 * @param parent
  	 * @param style
  	 */
  	public VariantSelector(Shell parent, int style) {
  		super(parent, style);
  		setText("Variant Selector");
  	}
  
  	/**
  	 * Open the dialog.
  	 * @return the result
  	 */
  	public Object open(HashSet<String> variantlist) {
  		if (variantlist.size()==0) return null;
  		currentVariant = variantlist;
  		createContents();
  		shlVariantSelector.open();
  		shlVariantSelector.layout();
  		Display display = getParent().getDisplay();
  		while (!shlVariantSelector.isDisposed()) {
  			if (!display.readAndDispatch()) {
  				display.sleep();
  			}
  		}
  		return result;
  	}
  
  	/**
  	 * Create contents of the dialog.
  	 */
  	private void createContents() {
  		shlVariantSelector = new Shell(getParent(), getStyle());
  		shlVariantSelector.setSize(261, 318);
  		shlVariantSelector.setText("Variant Selector");
  		shlVariantSelector.setLayout(new FormLayout());
  		
  		btnCancel = new Button(shlVariantSelector, SWT.NONE);
  		FormData fd_btnCancel = new FormData();
  		fd_btnCancel.right = new FormAttachment(100, -10);
  		btnCancel.setLayoutData(fd_btnCancel);
  		btnCancel.addSelectionListener(new SelectionAdapter() {
  			@Override
  			public void widgetSelected(SelectionEvent e) {
  				result = null;
  				shlVariantSelector.dispose();
  			}
  		});
  		btnCancel.setText("Cancel");
  		ListViewer listVariantViewer = new ListViewer(shlVariantSelector, SWT.BORDER | SWT.V_SCROLL);
  		listVariant = listVariantViewer.getList();
  		fd_btnCancel.bottom = new FormAttachment(100, -10);
  		FormData fd_listVariant = new FormData();
  		fd_listVariant.top = new FormAttachment(0, 10);
  		fd_listVariant.right = new FormAttachment(100, -10);
  		fd_listVariant.left = new FormAttachment(0, 10);
  		fd_listVariant.bottom = new FormAttachment(btnCancel, -6);
  		listVariant.setLayoutData(fd_listVariant);
  		listVariant.addListener(SWT.DefaultSelection, new Listener() {
  		      public void handleEvent(Event e) {
  		        int selected = listVariant.getSelectionIndex();
  		        String string = listVariant.getItem(selected);
  		        result = string;
  		        shlVariantSelector.dispose();
  		      }
  		    });
  
  		listVariantViewer.setContentProvider(new IStructuredContentProvider() {
  	        public Object[] getElements(Object inputElement) {
  	          HashSet<String> s = (HashSet<String>)inputElement;
  	          return s.toArray();
  	        }
  	        
  	        public void dispose() {
  	        }
  	   
  	        public void inputChanged(
  	          Viewer viewer,
  	          Object oldInput,
  	          Object newInput) {
  	        }
  	    });
  
  		listVariantViewer.setLabelProvider(new LabelProvider() {
  	        public Image getImage(Object element) {
  	          return null;
  	        }
  	   
  	        public String getText(Object element) {
  	          return (String)element;
  	        }
  		});
  		
  		listVariantViewer.setInput(currentVariant);
  
  	}
  }
  