com.mountainminds.eclemma.internal.ui.handlers.SelectActiveSessionHandler.java Source code

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Here is the source code for com.mountainminds.eclemma.internal.ui.handlers.SelectActiveSessionHandler.java

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/*******************************************************************************
 * Copyright (c) 2006, 2014 Mountainminds GmbH & Co. KG and Contributors
 * 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:
 *    Marc R. Hoffmann - initial API and implementation
 *    
 ******************************************************************************/
package com.mountainminds.eclemma.internal.ui.handlers;

import java.util.Collections;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.ListDialog;
import org.eclipse.ui.handlers.HandlerUtil;

import com.mountainminds.eclemma.core.CoverageTools;
import com.mountainminds.eclemma.core.ICoverageSession;
import com.mountainminds.eclemma.internal.ui.ContextHelp;
import com.mountainminds.eclemma.internal.ui.EclEmmaUIPlugin;
import com.mountainminds.eclemma.internal.ui.UIMessages;

/**
 * Handler to select the currently active coverage session.
 */
public class SelectActiveSessionHandler extends AbstractSessionManagerHandler {

    public SelectActiveSessionHandler() {
        super(CoverageTools.getSessionManager());
    }

    @Override
    public boolean isEnabled() {
        return !sessionManager.getSessions().isEmpty();
    }

    public Object execute(ExecutionEvent event) throws ExecutionException {
        final ListDialog dialog = new ListDialog(HandlerUtil.getActiveShell(event)) {
            protected void configureShell(Shell shell) {
                super.configureShell(shell);
                ContextHelp.setHelp(shell, ContextHelp.SELECT_ACTIVE_SESSION);
            }
        };
        dialog.setTitle(UIMessages.SelectActiveSessionDialog_title);
        dialog.setMessage(UIMessages.SelectActiveSessionDialog_message);
        dialog.setContentProvider(new ArrayContentProvider());
        dialog.setLabelProvider(new LabelProvider() {
            @Override
            public String getText(Object element) {
                return ((ICoverageSession) element).getDescription();
            }

            @Override
            public Image getImage(Object element) {
                return EclEmmaUIPlugin.getImage(EclEmmaUIPlugin.OBJ_SESSION);
            }
        });
        dialog.setInitialElementSelections(Collections.singletonList(sessionManager.getActiveSession()));
        dialog.setInput(sessionManager.getSessions());
        if (dialog.open() == Dialog.OK) {
            final Object[] result = dialog.getResult();
            if (result.length == 1) {
                sessionManager.activateSession((ICoverageSession) result[0]);
            }
        }
        return null;
    }
}