PersistTargetSelectionDialog.java

/*
 * Licensed to Laurent Broudoux (the "Author") under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Author licenses this
 * file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.github.lbroudoux.dsl.eip.parser.core.ui.dialogs;

import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TreeSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.FilteredTree;
import org.eclipse.ui.dialogs.PatternFilter;

/**
 * A dialog for selecting an EIP Model to persist parsed Route within.
 * @author laurent
 */
public class PersistTargetSelectionDialog extends TitleAreaDialog {
   
   /** The tree. */
   protected TreeViewer projectTree;
   
   /** The first resource file used for comparison. */
   private String fileName;
   /** The selected EIP Model selected via Dialog. */
   private IResource selectedEIPModel;
   
   /** Constructor. */
   public PersistTargetSelectionDialog(Shell parentShell, String fileName) {
      super(parentShell);
      this.fileName = fileName;
   }

   /** @return The selected EIP Model if any. */
   public IResource getSelectedEIPModel() {
      return selectedEIPModel;
   }
   
   @Override
   protected Control createDialogArea(Composite base) {
      Composite parent = (Composite) super.createDialogArea(base);
      Composite composite = new Composite(parent, SWT.NONE);
      
      GridLayout layout = new GridLayout();
      layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
      layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
      layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
      layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
      composite.setLayout(layout);
      composite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create());
      
      // Manage dialog tree content.
      FilteredTree tree = new FilteredTree(composite, SWT.SINGLE | SWT.BORDER,
            new PatternFilter(), true);

      projectTree = tree.getViewer();
      projectTree.setLabelProvider(new EIPModelTreeLabelProvider());
      projectTree.setContentProvider(new EIPModelTreeContentProvider());
      projectTree.setInput(ResourcesPlugin.getWorkspace().getRoot());
      
      GridDataFactory.fillDefaults().grab(true, true).hint(500, 300).applyTo(tree);
      
      // Manage dialog tree events.
      projectTree.addSelectionChangedListener(new ISelectionChangedListener() {
         @Override
         public void selectionChanged(SelectionChangedEvent event) {
            if (event.getSelection() instanceof TreeSelection) {
               TreeSelection tSelection = (TreeSelection)event.getSelection();
               if (tSelection.getFirstElement() instanceof IResource) {
                  selectedEIPModel = (IResource) tSelection.getFirstElement();
               }
            }
         }
      });
      
      setTitle("Parse and merge '" + fileName + "' with an EIP Model");
      setMessage("Select an EIP Model to persist the parsed resource within");
      applyDialogFont(composite);
      
      return composite;
   }
}