//
// (C) Copyright 2003-2016 by Autodesk, Inc.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting
// documentation.
//
// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to
// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
// (Rights in Technical Data and Computer Software), as applicable.
// 


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using RApplication = Autodesk.Revit.ApplicationServices.Application;


namespace Revit.SDK.Samples.UIAPI.CS
{
   /// <summary>
   /// Implement this method as an external command for Revit.
   /// </summary>
   /// <param name="commandData">An object that is passed to the external application
   /// which contains data related to the command,
   /// such as the application object and active view.</param>
   /// <param name="message">A message that can be set by the external application
   /// which will be displayed if a failure or cancellation is returned by
   /// the external command.</param>
   /// <param name="elements">A set of elements to which the external application
   /// can add elements that are to be highlighted in case of failure or cancellation.</param>
   /// <returns>Return the status of the external command.
   /// A result of Succeeded means that the API external method functioned as expected.
   /// Cancelled can be used to signify that the user cancelled the external operation 
   /// at some point. Failure should be returned if the application is unable to proceed with
   /// the operation.</returns>
   [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
   public class PreviewCommand : IExternalCommand
   {
      public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
      {
         _dbdocument = commandData.Application.ActiveUIDocument.Document;


         TransactionGroup outerGroup = new TransactionGroup(_dbdocument, "preview control");
         outerGroup.Start();

         try
         {
            PreviewModel form = new PreviewModel(commandData.Application.Application, new ElementId(-1));
            form.ShowDialog();
         }
         catch (Exception e)
         {
            throw e;
         }
         finally
         {
            outerGroup.RollBack();
         }

         return Result.Succeeded;
      }


      private Document _dbdocument = null;
   }

}