Bug 29755 Attach source does not allow one to select a folder... [build path]
When opening some .class that does not yet have a source attachment eclipse shows a text version of the interface defintion and a button for Attaching source. When pressing this button a window appaer where one can enter the name/location of a folder, zip or jar for the source. There are also a button for choosing it via a file selection dialog and this works fine for zip and jar files - but not for selecting a directory :( Workaround is just to enter the directory manually.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceAttachmentBlock.java
}
	}
	
	private IStatusChangeListener fContext;
	
	private StringButtonDialogField fFileNameField;
	private SelectionButtonDialogField fInternalButtonField;
	
	private IStatus fNameStatus;
	
	/**
	 * The file to which the archive path points to.
	 * Only set when the file exists.
	 */
	private File fResolvedFile; 
	/**
	 * The path to which the archive variable points.
	 * Null if invalid path or not resolvable. Must not exist.
	 */	
	private IPath fFileVariablePath;
		
	private IWorkspaceRoot fWorkspaceRoot;
	
	private Control fSWTWidget;
	private CLabel fFullPathResolvedLabel;
	
	private IJavaProject fProject;
	private IClasspathEntry fEntry;
	private IPath fContainerPath;
	/**