- 

/*******************************************************************************

 * Copyright (c) 2012 Red Hat, Inc.

 * 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:

 *    Camilo Bernal <cabernal@redhat.com> - Initial Implementation.

 *******************************************************************************/

package org.eclipse.linuxtools.internal.perf.ui;

import java.util.ArrayList;

import org.eclipse.jface.action.Action;

import org.eclipse.jface.action.IToolBarManager;

import org.eclipse.jface.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.TableViewer;

import org.eclipse.swt.SWT;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.ui.IActionBars;

import org.eclipse.ui.ISelectionListener;

import org.eclipse.ui.IWorkbenchPart;

import org.eclipse.ui.model.WorkbenchLabelProvider;

import org.eclipse.ui.part.ViewPart;

public class PerfDataCollectionView extends ViewPart {

	private static final String ID = "org.eclipse.linuxtools.internal.perf.views.SessionCompareView";

	public static ArrayList<Object> selectedFiles = new ArrayList<Object>();

	private TableViewer tableviewer;

	// This keeps track of the first selection event

	private boolean starting = true;

	// listener registered with the selection service

	public ISelectionListener listener = new ISelectionListener() {

		public void selectionChanged(IWorkbenchPart sourcepart,

				ISelection selection) {

			if (selectedFiles.size() >= 2)

				return;

			// ignore our own selections

			if (sourcepart != PerfDataCollectionView.this) {

				if (starting) {

					starting = false;

					return;

				}

				showSelection(sourcepart, selection);

			}

		}

	};

	/**

	 * Show selected files

	 * 

	 * @param sourcepart

	 *            source part of selection

	 * @param selection

	 *            selected item

	 */

	public void showSelection(IWorkbenchPart sourcepart, ISelection selection) {

		if (selection instanceof IStructuredSelection) {

			IStructuredSelection ss = (IStructuredSelection) selection;

			Object[] o = ss.toArray();

			selectedFiles.add(o[0]);

			showItems(selectedFiles.toArray());

		}

	}

	private void showItems(Object[] items) {

		tableviewer.setInput(items);

		tableviewer.refresh();

	}

	public void createPartControl(Composite parent) {

		setContentDescription("Select data files to compare from the Project Explorer");

		tableviewer = new TableViewer(parent, SWT.NONE);

		tableviewer.setLabelProvider(new WorkbenchLabelProvider());

		tableviewer.setContentProvider(new ArrayContentProvider());

		// provide tableviewer selection

		getSite().setSelectionProvider(tableviewer);

		contributeToActionBars();

		getSite().getWorkbenchWindow().getSelectionService()

				.addSelectionListener(listener);

	}

	private void contributeToActionBars() {

		Action clearAction = new PerfDataClearAction();

		Action diffAction = new PerfDiffAction();

		IActionBars actionBars = getViewSite().getActionBars();

		IToolBarManager toolBar = actionBars.getToolBarManager();

		toolBar.add(clearAction);

		toolBar.add(diffAction);

	}

	public void setFocus() {

		tableviewer.getControl().setFocus();

	}

	public void refreshView() {

		showItems(selectedFiles.toArray());

	}

	public void dispose() {

		// remove listener when disposing view

		getSite().getWorkbenchWindow().getSelectionService()

				.removeSelectionListener(listener);

		super.dispose();

	}

	public void clearSelections() {

		starting = true;

		selectedFiles.clear();

		refreshView();

	}

	public void restart() {

		starting = true;

	}

	public ArrayList<Object> getSelectedFiles() {

		return selectedFiles;

	}

}