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#ifndef __com_sun_star_container_XContainer_idl__ 
#define __com_sun_star_container_XContainer_idl__ 
 
#include <com/sun/star/uno/XInterface.idl> 
 
#include <com/sun/star/container/XContainerListener.idl> 
 
 
//============================================================================= 
 
module com {  module sun {  module star {  module container {  
 
//============================================================================= 
 
/** supports quick access to the information if a container currently 
    contains elements.
    
    <p>The <type>XContainer</type> interface is provided for containers
    which need to broadcast changes within the container; that means 
    the actions of adding or removing elements are broadcast to the 
    listeners.  </p>

    <p>This can be useful for UI to enable/disable some functions
    without actually accessing the data.  </p>

    @see XContent
    @see XIndexAccess
    @see XNameAcces
    @see XEnumerationAccess
 */
published interface XContainer: com::sun::star::uno::XInterface
{ 
    //------------------------------------------------------------------------- 
     
    /** adds the specified listener to receive events when
        elements are inserted or removed.

       <p>It is suggested to allow multiple registration of the same listener,
        thus for each time a listener is added, it has to be removed.

        @see XContainerListener
     */
    [oneway] void addContainerListener( [in] com::sun::star::container::XContainerListener xListener ); 
 
    //------------------------------------------------------------------------- 
     
    /** removes the specified listener so it does not receive
        any events from this container.

       <p>It is suggested to allow multiple registration of the same listener,
        thus for each time a listener is added, it has to be removed.
        
        @see XContainerListener
     */
    [oneway] void removeContainerListener( [in] com::sun::star::container::XContainerListener xListener ); 
 
}; 
 
//============================================================================= 
 
}; }; }; };  
 
#endif 
