core/org.eclipse.stem.ui/src/org/eclipse/stem/ui/widgets/RenameDialog.java

package org.eclipse.stem.ui.widgets;

/*******************************************************************************
 * Copyright (c) 2010 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
 *******************************************************************************/

import java.io.File;

import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.xmi.XMIResource;
import org.eclipse.stem.ui.wizards.Messages;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Dialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class RenameDialog extends Dialog {

	private String title;
	boolean cancelPressed = false;
	XMIResource resource;
	String value;
	
	public RenameDialog (Shell parent, int style, XMIResource resource, String title) {
		super (parent, style);
		this.title = title;
		this.resource = resource;
	}
	
	/**
	 * open the modal window. 
	 * @return The String[] with results, or null if cancel was pressed.
	 */
	public String  open () {
		Shell parent = getParent();
		final Shell shell = new Shell(parent, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
		shell.setText(title);
		GridLayout gl = new GridLayout();
		gl.numColumns = 2;
		shell.setLayout(gl);
		
		GridData gd = new GridData();
		gd.horizontalSpan = 2;
		
		final Text text = new Text(shell, SWT.NONE);
		if(resource != null) {
			text.setText(resource.getURI().lastSegment());
			value = resource.getURI().lastSegment();
		}
		text.setLayoutData(gd);
		gd.minimumWidth = 100;
		gd.grabExcessHorizontalSpace = true;
		
		final Button okayButton = new Button(shell, SWT.NONE);
		gd = new GridData();
		okayButton.setText(Messages.getString("Rename.dialog.okay"));
		okayButton.setLayoutData(gd);
		okayButton.setEnabled(false);
		
		Button cancelButton = new Button(shell, SWT.NONE);
		gd = new GridData();
		cancelButton.setText(Messages.getString("Rename.dialog.cancel"));
		cancelButton.setLayoutData(gd);
		
		shell.pack();
		shell.open();
		
		
		text.addModifyListener(new ModifyListener() {
			
			public void modifyText(ModifyEvent arg0) {
				URI oldURI = resource.getURI();
				String path = oldURI.path();
				int ind  = path.lastIndexOf("/");
				String truncpath = "";
				if(ind != -1) truncpath = path.substring(0, ind+1);
				
				String newpath = truncpath+text.getText();
				File f = new File(newpath);
				if(f.exists() || text.getText().trim().equals("") || text.getText().equals(resource.getURI().lastSegment())) {
					okayButton.setEnabled(false);
				} else {
					okayButton.setEnabled(true);
					value = text.getText();
				}
			}
		});
		
		okayButton.addSelectionListener( new SelectionListener() {
			
			public void widgetSelected(SelectionEvent arg0) {
				cancelPressed=false;
				shell.dispose();
			}
			
			public void widgetDefaultSelected(SelectionEvent arg0) {
				// TODO Auto-generated method stub
				
			}
		});
		
		cancelButton.addSelectionListener( new SelectionListener() {
			
			public void widgetSelected(SelectionEvent arg0) {
				cancelPressed=true;
				shell.dispose();
			}
			
			public void widgetDefaultSelected(SelectionEvent arg0) {
				// TODO Auto-generated method stub
				
			}
		});
		
		Display display = parent.getDisplay();
		while (!shell.isDisposed()) {
		if (!display.readAndDispatch()) display.sleep();
		}
		
		
		if(!cancelPressed) {
			String res = value;
			return res;
		}
		return null;
	}
	
	public static void main(String [] args) {
		Display display = new Display();
	    Shell shell = new Shell(display);
	    
//	    String [] rn = {"AGE0-10", "AGE11-35","AGE36-100"};
//		String [] cn = {"AGE0-10", "AGE11-35","AGE36-100"};
		
//		MatrixEditorDialog dialog = new MatrixEditorDialog(shell, SWT.PUSH, "Enter Values", (short)3, (short)3, rn, cn, new MatrixEditorValidator() {

		
		RenameDialog dialog  = new RenameDialog(shell, SWT.PUSH, null, "Enter stuff");
			 
	    dialog.open();
	    while (!shell.isDisposed()) {
	      if (!display.readAndDispatch()) {
	        display.sleep();
	      }
	    }
	    display.dispose();
	}
	
}