Bug 189393 Can not drop the item into cross table row
Description: Can not drop the item into cross table row Step: 1. New a cross table. 2. Drop any item from palette into cross table row. Actual result: The item cannot drop in it.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/tools/ReportCreationTool.java
import org.eclipse.swt.widgets.Display;
/**
 * Customizes eclipse creation tool to popup element builders.
 */
public class ReportCreationTool extends CreationTool
{
	private static final String MODEL_CREATE_ELEMENT_TRANS = Messages.getString( "ReportCreationTool.ModelTrans.CreateElement" ); 
	private AbstractToolHandleExtends preHandle;
	private boolean isCreating = false;
	/**
	 * Constructor
	 * 
	 * @param factory
	 * @param preHandle
	 */
	public ReportCreationTool( CreationFactory factory,
			AbstractToolHandleExtends preHandle )
	{
		super( factory );
		this.preHandle = preHandle;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.tools.CreationTool#performCreation(int)
	 */
	protected void performCreation( int button )
	{
		isCreating = true;
		SessionHandleAdapter.getInstance( )