AbstractDebugListSelectionDialog.java :  » IDE-Eclipse » debug » org » eclipse » debug » internal » ui » Java Open Source

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/*******************************************************************************
 * Copyright (c) 2007 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.debug.internal.ui;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;

/**
 * This class provides a simple selection dialog displaying items in a table.
 * 
 * @since 3.3
 */
public abstract class AbstractDebugListSelectionDialog extends AbstractDebugSelectionDialog {

  protected TableViewer fListViewer;
  
  /**
   * Constructor
   * @param parentShell
   */
  public AbstractDebugListSelectionDialog(Shell parentShell) {
    super(parentShell);
    setShellStyle(getShellStyle() | SWT.RESIZE);
  }
  
  /**
   * Create and return a viewer to use in this dialog.
   * 
   * @param parent the composite the viewer should be created in
   * @return the viewer to use in the dialog
   */
  protected StructuredViewer createViewer(Composite parent){
    //by default return a table viewer
    fListViewer = new TableViewer(parent, SWT.SINGLE | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
    GridData gd = new GridData(GridData.FILL_BOTH);
    gd.heightHint = 150;
    fListViewer.getTable().setLayoutData(gd);
    return fListViewer;
  }
  
  /* (non-Javadoc)
   * @see org.eclipse.debug.internal.ui.launchConfigurations.AbstractDebugSelectionDialog#addViewerListeners(org.eclipse.jface.viewers.StructuredViewer)
   */
  protected void addViewerListeners(StructuredViewer viewer) {
    viewer.addSelectionChangedListener(new ISelectionChangedListener(){
      public void selectionChanged(SelectionChangedEvent event) {
        getButton(IDialogConstants.OK_ID).setEnabled(isValid());
      }
    });
    viewer.addDoubleClickListener(new IDoubleClickListener(){
      public void doubleClick(DoubleClickEvent event) {
        if (isValid()){
          okPressed();
        }
      }
    });
  }
  
  /* (non-Javadoc)
   * @see org.eclipse.debug.internal.ui.AbstractDebugSelectionDialog#isValid()
   */
  protected boolean isValid() {
    if(fListViewer != null) {
      ISelection sel = fListViewer.getSelection();
      if(sel instanceof IStructuredSelection) {
        return ((IStructuredSelection)sel).size() == 1;
      }
    }
    return false;
  }
  
    /* (non-Javadoc)
     * @see org.eclipse.jface.dialogs.Dialog#okPressed()
     */
    protected void okPressed() {
    ISelection selection = fViewer.getSelection();
    if (selection instanceof IStructuredSelection) {
      setResult(((IStructuredSelection) selection).toList());
    }
    super.okPressed();
    }
  
}
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