Bug 124742 Disable/change fixed base value for string and date data
The Use fixed base value for interval option in the Edit Group dialog should be disabled for string and date data because it has no effect on these types of values. For date data, for example, if I specify a grouping interval of 1 week, and I specify a base value of 01/01/2006 (a Sunday), the dates are still grouped by weeks that start on Monday.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
/*******************************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * 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:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.report.designer.ui.dialogs;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.eclipse.birt.report.designer.core.model.views.data.DataSetItemModel;
import org.eclipse.birt.report.designer.internal.ui.dialogs.BaseDialog;
import org.eclipse.birt.report.designer.internal.ui.dnd.InsertInLayoutUtil;
import org.eclipse.birt.report.designer.internal.ui.util.DataSetManager;
import org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler;
import org.eclipse.birt.report.designer.internal.ui.util.UIUtil;
import org.eclipse.birt.report.designer.internal.ui.views.attributes.page.FilterHandleProvider;
import org.eclipse.birt.report.designer.internal.ui.views.attributes.page.FormPage;
import org.eclipse.birt.report.designer.internal.ui.views.attributes.page.SortingHandleProvider;
import org.eclipse.birt.report.designer.internal.ui.views.attributes.widget.Spinner;
import org.eclipse.birt.report.designer.nls.Messages;
import org.eclipse.birt.report.designer.ui.newelement.DesignElementFactory;
import org.eclipse.birt.report.designer.util.DEUtil;