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/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Activity management for Evolution.
 *
 * Authors:
 *   Ettore Perazzoli <ettore@ximian.com>
 *
 * Copyright (C) 2000, 2001 Ximian, Inc.
 */

module GNOME {
module Evolution {

interface Activity : Bonobo::Unknown {
    typedef long ActivityID;

    enum DialogType {
        DIALOG_TYPE_NONE,
        DIALOG_TYPE_MESSAGE,
        DIALOG_TYPE_WARNING,
        DIALOG_TYPE_INPUT,
        DIALOG_TYPE_ERROR
    };

    enum DialogAction {
        DIALOG_ACTION_DISPLAY,
        DIALOG_ACTION_POSTPONE
    };

    exception InvalidIcon {};
    exception IdNotFound {};

    /* Events propagated through the listener:

       - "Clicked": The status widget has been clicked on.

       - "DisplayProgress": Display a nice progress dialog for this
         operation.

       - "DisplayDialog": The dialog that the component has requested
         through ::requestDialog() can now be safely displayed.

       - "Cancelled": The user wants the operation to be cancelled.
     */

    /**
     * operationStarted:
     * @component_id: ID of the component starting the operation.
     * @information: Informative string about the operation being performed.
     * @cancellable: Whether this operation should be cancellable by
     * the user from the shell view.
     * @event_listener: Listener which the events for the activity
     * widget will be passed to.
     * @activity_id: A unique ID for the activity, to be used to update the
     * status of the operation.
     * @suggest_display: Whether displaying the dialog might be a nice idea.
     */
    void operationStarted (in string component_id,
                   in AnimatedIcon icon,
                   in string information,
                   in boolean cancellable,
                   in Bonobo::Listener event_listener,
                   out ActivityID activity_id,
                   out boolean suggest_display)
        raises (InvalidIcon);

    /**
     * operationProgressing:
     * @activity: The unique ID for the activity whose status we want to update.
     * @information: New informative string.  If empty, the informative string
     * isn't changed.
     * @progress: A float from 0.0 to 1.0 indicating the status of completion.
     *
     * Update the status of the specified @activity.
     */
    void operationProgressing (in ActivityID activity,
                   in string information,
                   in float progress)
        raises (IdNotFound);

    /**
     * operationFinished:
     * @activity: The unique ID for the activity that has been completed.
     *
     * Report that the specified @activity has been completed.  After this
     * method is invoked, @activity is not considered to be a valid ID
     * anymore.
     */
    void operationFinished (in ActivityID activity);

    /**
     * requestDialog:
     *
     * Inform the shell that the specified @activity requires user input
     * from a dialog.  The returned value specifies whether the shell wants
     * the dialog to be shown now (%DIALOG_ACTION_DISPLAY) or postponed
     * (%DIALOG_ACTION_POSTPONE).  If the return value is
     * %DIALOG_ACTION_POSTPONE, the component should wait for the
     * "DisplayDialog" event before proceeding further.  In that case, the
     * shell will flash the label related to this activity, and emit
     * "DisplayDialog" through the event source when the user clicks on it.
     */
    DialogAction requestDialog (in ActivityID activity,
                    in DialogType dialog_type);
};
        
};
};