org.eclipse.emf.emfstore.client.ui.errorreporting/src/org/eclipse/emf/emfstore/client/ui/errorreporting/ErrorReportingPreferencePage.java

/*******************************************************************************
 * Copyright (c) 2012 EclipseSource Muenchen GmbH.
 * 
 * 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:
 ******************************************************************************/
package org.eclipse.emf.emfstore.client.ui.errorreporting;

import java.io.File;

import org.eclipse.jface.preference.DirectoryFieldEditor;
import org.eclipse.jface.preference.FieldEditorPreferencePage;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;

/**
 * Preference page for error reporting feature.
 * 
 * @author emueller
 * 
 */
public class ErrorReportingPreferencePage extends FieldEditorPreferencePage implements IWorkbenchPreferencePage {

	private DirectoryFieldEditor zipPathEditor;

	/**
	 * Default constructor.
	 */
	public ErrorReportingPreferencePage() {
		super(GRID);
	}

	/**
	 * {@inheritDoc}
	 */
	public void init(IWorkbench workbench) {
		setPreferenceStore(Activator.getDefault().getPreferenceStore());
		getPreferenceStore().setDefault(ErrorReportingPreferences.ZIP_PATH_KEY,
			ErrorReportingPreferences.ZIP_PATH_DEFAULT);
	}

	private boolean validateZipPath(String zipPath) {
		return new File(zipPath).exists();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void createFieldEditors() {
		zipPathEditor = new DirectoryFieldEditor(ErrorReportingPreferences.ZIP_PATH_KEY, "&Zip path:",
			getFieldEditorParent());
		addField(zipPathEditor);
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void checkState() {

		super.checkState();
		boolean validZipPath = validateZipPath(zipPathEditor.getStringValue());

		if (validZipPath) {
			setValid(true);
			setErrorMessage(null);
		} else {
			setValid(false);
			setErrorMessage("Invalid zip path. \n");
		}

	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void propertyChange(PropertyChangeEvent event) {

		if (event.getProperty().equals("field_editor_value")) {
			checkState();
		}

	}
}