PromptDialog.java

/**
 *   GRANITE DATA SERVICES
 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
 *
 *   This file is part of the Granite Data Services Platform.
 *
 *   Granite Data Services is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2.1 of the License, or (at your option) any later version.
 *
 *   Granite Data Services is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
 *   General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 *   USA, or see <http://www.gnu.org/licenses/>.
 */

package org.granite.builder.ui;

import java.util.regex.Pattern;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.dialogs.SelectionStatusDialog;
import org.granite.builder.util.SWTUtil;

/**
 * @author Franck WOLFF
 */
public class PromptDialog extends SelectionStatusDialog {

	private final String initialValue;
	private final Pattern valuePattern;

	private Text input = null;

	public PromptDialog(Shell parent, String initialValue, Pattern valuePattern) {
		super(parent);
		this.initialValue = initialValue;
		this.valuePattern = valuePattern;
	}

	@Override
	protected Control createDialogArea(Composite parent) {
		Composite composite = (Composite)super.createDialogArea(parent);
		createMessageArea(composite);
		input = new Text(composite, SWT.BORDER);
		input.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		if (initialValue != null)
			input.setText(initialValue);
		input.addModifyListener(new ModifyListener() {
			@Override
			public void modifyText(ModifyEvent event) {
				String value = input.getText();
				if (valuePattern != null) {
					if (valuePattern.matcher(value).matches()) {
						input.setBackground(SWTUtil.getColor(getShell().getDisplay(), SWTUtil.WHITE));
						getOkButton().setEnabled(true);
					}
					else {
						input.setBackground(SWTUtil.getColor(getShell().getDisplay(), SWTUtil.LIGHT_RED));
						getOkButton().setEnabled(false);
					}
				}
			}
		});
		
		applyDialogFont(composite);
		return composite;
	}
	
	@Override
	protected void computeResult() {
		if (input != null && input.getText() != null)
			setSelectionResult(new String[]{input.getText().trim()});
	}
	
	@Override
	protected void cancelPressed() {
		setSelectionResult(null);
		super.cancelPressed();
	}
}