Bug 113938 Report is marked dirty when open/close cascading parameter dialog without doing any operation on it
description: Report is marked dirty when open/close cascading parameter dialog without doing any operation on it steps to reproduce: 1.new a cascading parameter group 2.save the reprot 3.double click the cascading parameter to bring out edit box 4.click OK to close edit box actual result: Report has been marked dirty expected result: No dirty marked for that no operations done in edit parameter dialog
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/CascadingParametersDialog.java
String type = getSelectedDataType( );
		String formatStr = ""; 
		if ( DesignChoiceConstants.PARAM_TYPE_STRING.equals( type ) )
		{
			formatStr = new StringFormatter( pattern, Locale.getDefault( ) ).format( DEFAULT_PREVIEW_STRING );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_DATETIME.equals( type ) )
		{
			formatStr = new DateFormatter( pattern ).format( new Date( ) );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_DECIMAL.equals( type )
				|| DesignChoiceConstants.PARAM_TYPE_FLOAT.equals( type ) )
		{
			formatStr = new NumberFormatter( pattern ).format( DEFAULT_PREVIEW_NUMBER );
		}
		previewLable.setText( formatStr );
	}
	private String getCategroy( String formatString )
	{
		if ( formatString != null )
		{
			return formatString.split( ":" )[0]; 
		}
		return null;
	}
	private String getPattern( String formatString )
	{
		if ( formatString != null )
		{
			int index = formatString.indexOf( ':' );