typelookupcelleditor.java

一个java写的business process management系统

/*
 * Copyright (c) 2004, Peter Friese
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Flow4J-Eclipse project nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.orthanc.flow4j.designer.model.propertycelleditors;

import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchEngine;
import org.eclipse.jdt.ui.IJavaElementSearchConstants;
import org.eclipse.jdt.ui.JavaUI;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.viewers.DialogCellEditor;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.dialogs.SelectionDialog;

/**
 * A cell editor that opens a type lookup editor for selecting a java type.
 * 
 * @author Peter Friese
 * @version 1.0
 * @since 09.07.2004
 */

public class TypeLookupCellEditor extends DialogCellEditor {

	/** The base type of the hierarchy to be displayed. */
	private IType baseType;

	/**
	 * A cell editor that features a button with elipses. When the user clicks the
	 * button, a Java type chooser dialog opens, displaying the type hierarchy of
	 * the type specified in <code>baseType</code>. 
	 * 
	 * @param parent The parent composite.
	 * @param baseType The base type of the class hierarchy to display.
	 */
	public TypeLookupCellEditor(Composite parent, IType baseType) {
		super(parent);
		this.baseType = baseType;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.DialogCellEditor#openDialogBox(org.eclipse.swt.widgets.Control)
	 */
	protected Object openDialogBox(Control cellEditorWindow) {
		SelectionDialog dialog;
		try {
			IJavaSearchScope scope = SearchEngine.createHierarchyScope(this.baseType);
			dialog = JavaUI.createTypeDialog(
				cellEditorWindow.getShell(), 
				new ProgressMonitorDialog(cellEditorWindow.getShell()), 
				scope, 
				IJavaElementSearchConstants.CONSIDER_TYPES, 
				false, 
				"*");
			dialog.setTitle("Select a Task Flowlet");
			dialog.setMessage("Please select a Task Flowlet");
		}
		catch (JavaModelException e) {
			e.printStackTrace();
			return null;
		}
		if (dialog.open() == IDialogConstants.CANCEL_ID)
			return null;

		Object[] types = dialog.getResult();
		if (types == null || types.length == 0) {
			return null;
		}
		IType selection = (IType) types[0];
		return selection.getFullyQualifiedName();
	}
	
	/**
	 * @return Returns the baseType.
	 */
	public IType getBaseType() {
		return this.baseType;
	}
	
	/**
	 * @param baseType The baseType to set.
	 */
	public void setBaseType(IType baseType) {
		this.baseType = baseType;
	}
}