/*

 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "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.nokia.carbide.internal.discovery.ui.wizard;

import java.util.ArrayList;

import java.util.Collection;

import java.util.List;

import org.eclipse.jface.dialogs.Dialog;

import org.eclipse.jface.layout.GridDataFactory;

import org.eclipse.jface.layout.GridLayoutFactory;

import org.eclipse.jface.resource.ImageDescriptor;

import org.eclipse.jface.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.CheckboxTableViewer;

import org.eclipse.jface.viewers.ColumnLabelProvider;

import org.eclipse.jface.viewers.TableViewerColumn;

import org.eclipse.jface.wizard.WizardPage;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.events.ModifyListener;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.graphics.Image;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.TableColumn;

import org.eclipse.swt.widgets.Text;

import com.nokia.carbide.discovery.ui.Activator;

import com.nokia.carbide.discovery.ui.Messages;

/**

 * Abstract superclass of import and export page

 */

abstract class AbstractImportExportPage extends WizardPage {

	protected Text pathText;

	protected Button browseButton;

	protected CheckboxTableViewer viewer;

	protected static final ImageDescriptor FEATURE_IMGDESC = Activator

			.getImageDescriptor("icons/iu_obj.gif"); //$NON-NLS-1$

	protected Image featureImg;

	public AbstractImportExportPage(String pageName) {

		super(pageName);

	}

	public void createControl(Composite parent) {

		initializeDialogUnits(parent);

		featureImg = FEATURE_IMGDESC.createImage();

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

		GridLayoutFactory.swtDefaults().numColumns(2).applyTo(composite);

		GridDataFactory.fillDefaults().applyTo(composite);

		composite.setSize(composite.computeSize(SWT.DEFAULT, SWT.DEFAULT));

		Dialog.applyDialogFont(composite);

		setControl(composite);

	}

	protected void createBrowseGroup(Composite parent, String labelText) {

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

		GridLayoutFactory.fillDefaults().numColumns(3).applyTo(composite);

		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BEGINNING)

				.grab(true, false).applyTo(composite);

		Label label = new Label(composite, SWT.NONE);

		label.setText(labelText);

		pathText = new Text(composite, SWT.BORDER);

		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER)

				.grab(true, false).hint(250, SWT.DEFAULT).applyTo(pathText);

		pathText.addModifyListener(new ModifyListener() {

			public void modifyText(ModifyEvent e) {

				setPageComplete(validatePage());

			}

		});

		browseButton = new Button(composite, SWT.PUSH);

		browseButton.setText(Messages.AbstractImportExportPage_BrowseButtonLabel);

		browseButton

				.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

		setButtonLayoutData(browseButton);

		new Label(parent, SWT.NONE); // spacer

	}

	protected void createViewerGroup(Composite parent, String labelText) {

		Label label = new Label(parent, SWT.NONE);

		label.setText(labelText);

		GridDataFactory.defaultsFor(label).span(2, 1).applyTo(label);

		viewer = CheckboxTableViewer.newCheckList(parent, SWT.BORDER);

		TableViewerColumn featureColumn = new TableViewerColumn(viewer,

				SWT.CENTER);

		featureColumn.getColumn().setText(Messages.AbstractImportExportPage_FeatureColTitle);

		featureColumn.setLabelProvider(new ColumnLabelProvider() {

			@Override

			public Image getImage(Object element) {

				return featureImg;

			}

			@Override

			public String getText(Object element) {

				if (element instanceof FeatureInfo)

					return ((FeatureInfo) element).getId();

				return null;

			}

		});

		TableViewerColumn versionColumn = new TableViewerColumn(viewer,

				SWT.CENTER);

		versionColumn.getColumn().setText(Messages.AbstractImportExportPage_VersionColTitle);

		versionColumn.setLabelProvider(new ColumnLabelProvider() {

			@Override

			public String getText(Object element) {

				if (element instanceof FeatureInfo) {

					return ((FeatureInfo) element).getVersion().toString();

				}

				return null;

			}

		});

		viewer.getControl().setLayoutData(

				new GridData(GridData.FILL_BOTH | GridData.GRAB_HORIZONTAL

						| GridData.GRAB_VERTICAL));

		viewer.setContentProvider(new ArrayContentProvider());

		viewer.getTable().setHeaderVisible(true);

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

		GridDataFactory.swtDefaults().align(SWT.END, SWT.BEGINNING)

				.applyTo(buttonComposite);

		buttonComposite.setLayout(new GridLayout());

		checkAllButton.setText(Messages.AbstractImportExportPage_CheckAllLabel);

		setButtonLayoutData(checkAllButton);

		checkAllButton.addSelectionListener(new SelectionAdapter() {

			@Override

			public void widgetSelected(SelectionEvent e) {

				viewer.setAllChecked(true);

			}

		});

		checkNoneButton.setText(Messages.AbstractImportExportPage_CheckNoneLabel);

		setButtonLayoutData(checkNoneButton);

		checkNoneButton.addSelectionListener(new SelectionAdapter() {

			@Override

			public void widgetSelected(SelectionEvent e) {

				viewer.setAllChecked(false);

			}

		});

	}

	protected abstract boolean validatePage();

	public Collection<FeatureInfo> getSelectedFeatures() {

		Object[] checkedElements = viewer.getCheckedElements();

		List<FeatureInfo> infos = new ArrayList<FeatureInfo>();

		for (Object o : checkedElements) {

			infos.add((FeatureInfo) o);

		}

		return infos;

	}

	protected void packColumns() {

		TableColumn[] columns = viewer.getTable().getColumns();

		for (TableColumn column : columns) {

			column.pack();

		}

	}

	protected void updateViewer() {

		packColumns();

		viewer.setAllChecked(true);

		setPageComplete(validatePage());

	}

	@Override

	public void dispose() {

		super.dispose();

		featureImg.dispose();

	}

}