using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;

using System;

namespace HYJig
{
    [Regeneration(0)]
    [Transaction(TransactionMode.Manual)]
    public class Jig3PtArc : IExternalCommand
    {
        public Result Execute(ExternalCommandData cmdData, ref string message, ElementSet elements)
        {
            UIDocument activeUIDocument = cmdData.Application.ActiveUIDocument;
            ViewAssist.ViewValidating(activeUIDocument.Document, activeUIDocument.ActiveView);
            XArc3PtJig xarc3PtJig = new XArc3PtJig(activeUIDocument);
            XYZ xyz = xarc3PtJig.PickStartPoint("请确定圆弧起点：");
            Result result;
            if (xyz == null)
            {
                xarc3PtJig.Dispose();
                result = 0;
            }
            else
            {
                XYZ xyz2 = xarc3PtJig.PickEndPoint(xyz, "请确定圆弧终点：");
                if (xyz2 == null)
                {
                    xarc3PtJig.Dispose();
                    result = 0;
                }
                else
                {
                    XYZ xyz3 = xarc3PtJig.PickOnCurvePoint(xyz, xyz2, "请确定圆弧上的点：");
                    if (xyz3 == null)
                    {
                        xarc3PtJig.Dispose();
                        result = 0;
                    }
                    else
                    {
                        Transaction transaction = new Transaction(activeUIDocument.Document);
                        transaction.Start("CreateCurve");
                        Arc arc = Arc.Create(xyz, xyz2, xyz3);
                        activeUIDocument.Document.Create.NewDetailCurve(activeUIDocument.ActiveView, arc);
                        transaction.Commit();
                        xarc3PtJig.Dispose();
                        result = 0;
                    }
                }
            }
            return result;
        }
    }
}