Bug 175664 [Mac] Unexpected internal exception occurs when invoke expression builder
Description: There are two problems: 1. "fx" button (Click this button to invoke Expression Builder) could not be displayed correctly, nothing displayed in the button. 2. Click on the button, an unexpected internal exception occurs. Version:2.2.0.v20070205 Steps to reproduce: 1.Insert a Data item to the layout. Click "fx" button to invoke the expression builder, although on Mac "fx" button could not display correctly. Error log: Argument cannot be null Plug-in Provider: Eclipse.org Plug-in Name: BIRT Designer UI Plug-in ID: org.eclipse.birt.report.designer.ui Error Code: Error.GUIException.invokedByUnexpectedException Error Message:Argument cannot be null
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
/**
	 * Check if the property should add quote. Currently use in set fontfamily
	 * property.
	 * 
	 * @param elementName
	 * @param property
	 * @param value
	 * @return
	 */
	public static boolean needAddQuote( String elementName, String property,
			String value )
	{
		IChoice[] choices = ChoiceSetFactory.getElementChoiceSet( elementName,
				property ).getChoices( );
		for ( int i = 0; i < choices.length; i++ )
		{
			if ( choices[i].getValue( ).equals( value ) )
			{
				return false;
			}
		}
		return true;
	}
	/**
	 * Notice: Please dispose the image after done.
	 * 
	 * @param composite
	 * @return
	 */
	public static Image newImageFromComposite( Composite composite )