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#ifndef __com_sun_star_datatransfer_dnd_XDropTargetListener_idl__
#define __com_sun_star_datatransfer_dnd_XDropTargetListener_idl__

#include <com/sun/star/datatransfer/dnd/DropTargetDragEnterEvent.idl>
#include <com/sun/star/datatransfer/dnd/DropTargetDropEvent.idl>
#include <com/sun/star/lang/XEventListener.idl>

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

module com { module sun { module star { module datatransfer { module dnd {

//=============================================================================
/** This interface is the callback interface used by the drop target object to
    provide notification of Drag and Drop operations that involve the subject
    drop target.

    <p>Methods of this interface may be implemented to provide "drag under"
    visual feedback to the user throughout the Drag and Drop operation.</p>
*/

published interface XDropTargetListener: com::sun::star::lang::XEventListener
{
    //-------------------------------------------------------------------------
    /** The drag operation has terminated with a drop on this drop target.

        <p><strong>NOTE:</strong> This method should not be oneway. The implementation
        has to wait until the method <method>XDropTargetDropContext::dropComplete</method>
        is called before releasing the data for the drop operation. This
        should occur before returning from drop in a normal flow of operation.
        Also, the implementor of <type>XDropTargetListener</type> should not assume
        the <type>DropTargetDropEvent</type> to be meaningful after returning
        from the <member>XDropTargetListener::drop()</member> method.</p>

        @param dtde
        The <type>DropTargetDropEvent</type>.
    */

    void drop( [in] DropTargetDropEvent dtde );

      //-------------------------------------------------------------------------
    /** Called when a drag operation has encountered the drop target.

        @param dtde
        The <type>DropTargetDragEvent</type>.
    */

    [oneway] void dragEnter( [in] DropTargetDragEnterEvent dtdee );

      //-------------------------------------------------------------------------
    /** The drag operation has departed the drop target without dropping.

        @param dte
        The <type>DropTargetEvent</type>.
    */

    [oneway] void dragExit( [in] DropTargetEvent dte );

      //-------------------------------------------------------------------------
    /** Called when a drag operation is ongoing on the drop target.

        @param dtde
        The <type>DropTargetEvent</type>.
    */

    [oneway] void dragOver( [in] DropTargetDragEvent dtde );

      //-------------------------------------------------------------------------
    /** Called when the user has modified the drop gesture.

        @param dtde
        The <type>DropTargetEvent</type>.
    */

    [oneway] void dropActionChanged( [in] DropTargetDragEvent dtde );
};

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

}; }; }; }; };

#endif

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