/*************************************************************************
 *
 *  $RCSfile: ValueBinding.idl,v $
 *
 *  $Revision: 1.3.40.1 $
 *
 *  last change: $Author: vg $ $Date: 2003/11/14 10:52:22 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
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 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
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 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
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 ************************************************************************/

#ifndef __drafts_com_sun_star_form_ValueBinding_idl__
#define __drafts_com_sun_star_form_ValueBinding_idl__

#ifndef __drafts_com_sun_star_util_XValueBinding_idl__
#include <drafts/com/sun/star/form/XValueBinding.idl>
#endif
#ifndef __com_sun_star_beans_XPropertySet_idl__
#include <com/sun/star/beans/XPropertySet.idl>
#endif
#ifndef __com_sun_star_lang_XComponent_idl__
#include <com/sun/star/lang/XComponent.idl>
#endif
#ifndef __com_sun_star_util_XModifyBroadcaster_idl__
#include <com/sun/star/util/XModifyBroadcaster.idl>
#endif

//=============================================================================

module drafts { module com {  module sun {  module star {  module form {

//=============================================================================

/** defines a component which allows access to a single value

    <p>Read/Write access to the value represented by this component is supported,
    as well as (optionally) active broadcasting of value changes</p>
*/
service ValueBinding
{
    /** determines whether the value is currently readonly

        <p>For instance, you could imagine a <type>ValueBinding</type> which
        represents a cell in a spreadsheet document, and whose value is readonly
        as long as the spreadsheet is locked.</p>
    */
    [property, bound, readonly]  boolean  ReadOnly;

	//-------------------------------------------------------------------------
	/** allows access to the properties of the binding
    */
    interface   com::sun::star::beans::XPropertySet;

    //-------------------------------------------------------------------------
	/** allows read and write access to the value represented by this binding
    */
    interface XValueBinding;

    /** allows other components to be notified when the value represented
        by the <type>ValueBinding</type> instance changes.

        <p>This interface is optional, since a binding may not support
        actively notifying changes in it's value. Note, however, that in case
        this interface is not supported, the bound component cannot react
        on value changes, and will thus override any values which are
        set by an instance other than itself.</p>
    */
    [optional] interface com::sun::star::util::XModifyBroadcaster;

    /** allows life time control for the component

        <p>An <type>ValueBinding</type> may be known to one ore more components
        supporting the <type>XBindableValue</type> interface, which all work with
        this binding. However, they will not <em>own</em> the <type>ValueBinding</type>.
        The ownership is with another instance, which may also decide to obsolete
        the <type>ValueBinding</type> for whatever reasons (e.g. because the data model
        which the binding reflected died). For this reason, a <type>ValueBinding</type>
        must offer a possibility to be obsoleted by it's owner, and to notify this
        obsoletion to other interested parties, such as <type>XBindableValue</type>s.</p>
    */
    interface com::sun::star::lang::XComponent;
};

//=============================================================================

}; }; }; }; };

#endif
