// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

package com.symbian.smt.gui.preferences;

import org.eclipse.core.runtime.preferences.DefaultScope;

import org.eclipse.core.runtime.preferences.IEclipsePreferences;

import org.eclipse.core.runtime.preferences.IScopeContext;

import org.eclipse.core.runtime.preferences.InstanceScope;

import org.eclipse.jface.preference.PreferencePage;

import org.eclipse.jface.resource.ImageDescriptor;

import org.eclipse.swt.SWT;

import org.eclipse.swt.layout.FillLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.ui.IWorkbench;

import org.eclipse.ui.IWorkbenchPreferencePage;

import com.symbian.smt.gui.Activator;

import com.symbian.smt.gui.PersistentDataStore;

import com.symbian.smt.gui.smtwidgets.ModelControlWidget;

import com.symbian.smt.gui.smtwidgets.ValidModelDefinedListener;

import com.symbian.smt.gui.smtwidgets.ValidModelEvent;

import com.symbian.smt.gui.smtwidgets.ValidModelEvent.Type;

public class ModelControlPreferences extends PreferencePage implements

		IWorkbenchPreferencePage, ValidModelDefinedListener {

	private ModelControlWidget modelControlWidget;

	private PersistentDataStore instanceStore;

	private PersistentDataStore defaultStore;

	public ModelControlPreferences() {

	}

	public ModelControlPreferences(String title) {

		super(title);

	}

	public ModelControlPreferences(String title, ImageDescriptor image) {

		super(title, image);

	}

	@Override

	protected Control createContents(Composite parent) {

		Composite composite = new Composite(parent, SWT.NONE);

		composite.setLayout(new FillLayout(SWT.VERTICAL));

		modelControlWidget = new ModelControlWidget(composite, SWT.NONE);

		IScopeContext defaultScope = new DefaultScope();

		IEclipsePreferences defaultNode = defaultScope

				.getNode(Activator.PLUGIN_ID);

		defaultStore = new PersistentDataStore(defaultNode);

		IScopeContext instanceScope = new InstanceScope();

		IEclipsePreferences instanceNode = instanceScope

				.getNode(Activator.PLUGIN_ID);

		instanceStore = new PersistentDataStore(instanceNode, defaultNode);

		modelControlWidget.initialisePrintedDpi(defaultStore);

		modelControlWidget.addModelListener(this);

		populate(instanceStore);

		composite.pack();

		parent.pack();

		return composite;

	}

	@Override

	public void dispose() {

		if (modelControlWidget != null) {

			modelControlWidget.removeModelListener(this);

		}

		super.dispose();

	}

	public void init(IWorkbench workbench) {

		setPreferenceStore(Activator.getDefault().getPreferenceStore());

		setDescription("System Model Diagram model control.");

	}

	public void performDefaults() {

		restoreDefaults();

	}

	public boolean performOk() {

		storeValues();

		return super.performOk();

	}

	private void populate(PersistentDataStore dataStore) {

		// printedDpi field has already been initialised via the call to

		// modelControlWidget.initialisePrintedDpi()

		modelControlWidget.setHighlightCoreOS(dataStore.getHighlightCoreOS());

		modelControlWidget.setLevelOfDetail(dataStore.getLevelOfDetail());

		modelControlWidget.setSuppressMouseOverEffect(dataStore

				.getSuppressMouseOverEffect());

		modelControlWidget.setFixItemSize(dataStore.getFixItemSize());

	}

	private void restoreDefaults() {

		modelControlWidget.setLevelOfDetail(defaultStore.getLevelOfDetail());

		modelControlWidget.setPrintedDpis(defaultStore.getPrintedDpis());

		modelControlWidget.setSelectedPrintedDpi(defaultStore

				.getSelectedPrintedDpi());

		modelControlWidget

				.setHighlightCoreOS(defaultStore.getHighlightCoreOS());

		modelControlWidget.setSuppressMouseOverEffect(defaultStore

				.getSuppressMouseOverEffect());

		modelControlWidget.setFixItemSize(defaultStore.getFixItemSize());

	}

	private void storeValues() {

		instanceStore.setHighlightCoreOS(modelControlWidget

				.getHighlightCoreOS());

		instanceStore.setLevelOfDetail(modelControlWidget.getLevelOfDetail());

		instanceStore.setPrintedDpis(modelControlWidget.getPrintedDpis());

		instanceStore.setSelectedPrintedDpi(modelControlWidget

				.getSelectedPrintedDpi());

		instanceStore.setSuppressMouseOverEffect(modelControlWidget

				.getSuppressMouseOverEffect());

		instanceStore.setFixItemSize(modelControlWidget.getFixItemSize());

	}

	/**

	 * This method is called by the observed object when a change occurs to

	 * ensure the information entered into the widget is acceptable. In this

	 * case we set the page in error mode if validation of the printed DPI field

	 * fails.

	 * 

	 * @return void

	 * @see com.symbian.smt.gui.smtwidgets.ValidModelDefinedListener#validModelDefined(ValidModelEvent)

	 **/

	public void validModelDefined(ValidModelEvent event) {

		Boolean isValid = event.isValid();

		Type eventType = event.getType();

		setValid(isValid);

		if (isValid) {

			setErrorMessage(null);

			if (eventType == Type.WARNING) {

				setMessage(event.getMessage(), WARNING);

			}

		} else {

			setErrorMessage(event.getMessage());

			setMessage(null);

		}

	}

}