Bug 183308 IllegalArgumentException occurs after insert a empty group on a List report item[0001]
Description: IllegalArgumentException occurs after insert a empty group on a List report item[0001] Build number: 2.2.0.v20070419-0945 Steps to reproduce: 1, Insert a list 2, Insert a group on the list, only specify the Group On: "aa" Expected result: No exception Actual result: IllegalArgumentException occurs Error log: java.lang.IllegalArgumentException: Argument cannot be null at org.eclipse.swt.SWT.error(SWT.java:3483) at org.eclipse.swt.SWT.error(SWT.java:3422) at org.eclipse.swt.SWT.error(SWT.java:3393) at org.eclipse.swt.widgets.Widget.error(Widget.java:432) at org.eclipse.swt.widgets.Text.setText(Text.java:1793) at org.eclipse.birt.report.designer.ui.dialogs.GroupDialog$6.focusLost(GroupDialog.java:485) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:136) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:962)
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
intervalRange = new Text( intervalRangeArea, SWT.SINGLE | SWT.BORDER );
		intervalRange.setLayoutData( new GridData( GridData.HORIZONTAL_ALIGN_FILL ) );
		intervalRange.addVerifyListener( new VerifyListener( ) {
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.swt.events.VerifyListener#verifyText(org.eclipse.swt.events.VerifyEvent)
			 */
			public void verifyText( VerifyEvent event )
			{
				if ( event.text.length( ) <= 0 )
				{
					return;
				}
				int beginIndex = Math.min( event.start, event.end );
				int endIndex = Math.max( event.start, event.end );
				String inputtedText = intervalRange.getText( );
				String newString = inputtedText.substring( 0, beginIndex );
				newString += event.text;
				newString += inputtedText.substring( endIndex );
				event.doit = false;
				try
				{
					double value = Double.parseDouble( newString );
					if ( value >= 0 )
					{
						event.doit = true;
					}
				}