OptionMidpoint.java

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package edu.rice.cs.hpc.traceviewer.actions;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.Command;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.handlers.HandlerUtil;
import org.eclipse.ui.services.ISourceProviderService;

import edu.rice.cs.hpc.common.ui.Util;
import edu.rice.cs.hpc.traceviewer.services.DataService;
import edu.rice.cs.hpc.traceviewer.spaceTimeData.SpaceTimeDataController;

public class OptionMidpoint extends AbstractHandler {

    final static public String commandId = "edu.rice.cs.hpc.traceviewer.actions.OptionMidpoint";

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException 
    {
        final IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindow(event);
        
        Command command = event.getCommand();
        if (command != null) 
        {
            ISourceProviderService sourceProviderService = (ISourceProviderService) window.getService(
                    ISourceProviderService.class);
            DataService dataService = (DataService) sourceProviderService.getSourceProvider(DataService.DATA_PROVIDER);
            final SpaceTimeDataController data = dataService.getData();

            boolean enable = !Util.isOptionEnabled(command);
            data.setEnableMidpoint(enable);
        }

        HandlerUtil.toggleCommandState(command);
        // use the old value and perform the operation 
        return null;
    }

}