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

using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Colors;
using Autodesk.AutoCAD.Windows;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.DatabaseServices;

namespace T_cad
{



    /// <summary>
    /// RGB三原色
    /// </summary>
    public struct colorgb
    {
        public byte red;
        public byte green;
        public byte blue;

        public colorgb(byte r, byte g, byte b)
        {
            this.red = r;
            this.green = g;
            this.blue = b;
        }
    }



    /// <summary>
    /// 对图层的操作处理，包括新建图层、
    /// 把指定图层设置为当前图层和检查是否包含某个图层名
    /// </summary>
    class LayerControl
    {
        /// <summary>
        /// 创建高程点错误标记层
        /// </summary>
        /// <param name="layername">要创建的图层的名字</param>
        /// <param name="colo">RGB三原色</param>
        public void creatlayer(string layername, colorgb colo)
        {
            Database database = Autodesk.AutoCAD.DatabaseServices.HostApplicationServices.WorkingDatabase;
            DocumentLock doclock = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();
            Transaction traction = database.TransactionManager.StartTransaction();
            LayerTable lt = traction.GetObject(database.LayerTableId, OpenMode.ForWrite) as LayerTable;
            try
            {
                LayerTableRecord layertablerecord = new LayerTableRecord();
                layertablerecord.Name = layername;//设置层表记录的名字
                layertablerecord.Color = Autodesk.AutoCAD.Colors.Color.FromRgb(colo.red, colo.green, colo.blue);//为层表记录赋颜色紫色
                //layertablerecord.Color = Autodesk.AutoCAD.Colors.Color.FromColor(System.Drawing.Color.Magenta);


                lt.Add(layertablerecord);
                traction.AddNewlyCreatedDBObject(layertablerecord, true);
                traction.Commit();
            }
            catch (Autodesk.AutoCAD.Runtime.Exception)
            {
                traction.Abort();
            }
            finally
            {
                traction.Dispose();
                doclock.Dispose();
            }
        }


        /// <summary>
        /// 将指定图层设置为当前图层
        /// </summary>
        /// <param name="layername">要设置为当前图层的图层名字</param>
        //public void movelayertofront(string layername)
        //{
        //    Database database = Autodesk.AutoCAD.DatabaseServices.HostApplicationServices.WorkingDatabase;
        //    DocumentLock doclock = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();
        //    Transaction traction = database.TransactionManager.StartTransaction();
        //    try
        //    {
        //        LayerTable layertable = traction.GetObject(database.LayerTableId, OpenMode.ForRead) as LayerTable;
        //        database.Clayer = layertable[layername];//把图层选为当前图层
        //        traction.Commit();
        //    }
        //    catch (Autodesk.AutoCAD.Runtime.Exception)
        //    {
        //        traction.Abort();
        //    }
        //    finally
        //    {
        //        traction.Dispose();
        //        doclock.Dispose();
        //    }
        //}



        /// <summary>
        /// 判断所命图层名是否已经存在
        /// </summary>
        /// <param name="layername">要判断的图层名字</param>
        /// <returns>返回true表示在层表中存在要判断的图层名，
        /// 返回false表示层表中不存在判断的图层名</returns>
        public bool haslayername(string layername)
        {
            Database database = Autodesk.AutoCAD.DatabaseServices.HostApplicationServices.WorkingDatabase;
            using (Transaction traction = database.TransactionManager.StartTransaction())
            {
                LayerTable lt = traction.GetObject(database.LayerTableId, OpenMode.ForRead) as LayerTable;

                if (lt.Has(layername))
                {
                    traction.Commit();
                    return true;
                }
                else
                {
                    traction.Commit();
                    return false;
                }
            }



        }




        public void clear(string layername)
        {
           
            Document document = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
            Database database = HostApplicationServices.WorkingDatabase;

           
            

            DocumentLock documentlock = null;
            Transaction traction = null;
            try
            {
                traction = database.TransactionManager.StartTransaction();
                documentlock = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument();

                BlockTable blocktable = traction.GetObject(database.BlockTableId,
                                          OpenMode.ForWrite) as BlockTable;

                BlockTableRecord blocktablerecord = traction.GetObject(blocktable[BlockTableRecord.ModelSpace],
                                                OpenMode.ForWrite) as BlockTableRecord;


                Editor editor = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
                TypedValue[] typedvalue = new TypedValue[2];

                typedvalue.SetValue(new TypedValue((int)DxfCode.Start, "Circle"), 0);
                typedvalue.SetValue(new TypedValue((int)DxfCode.LayerName, "Cir"), 1);

                SelectionFilter selectionfilter = new SelectionFilter(typedvalue);
                PromptSelectionResult select = editor.SelectAll(selectionfilter);

                if (select.Status == PromptStatus.OK)
                {
                    SelectionSet set = select.Value;

                    ObjectId[] obj = new ObjectId[set.Count];
                    obj = set.GetObjectIds();
                    for (int i = 0; i < obj.Length; i++)
                    {
                        ObjectId objid = obj[i];
                        Entity entity = (Entity)traction.GetObject(objid, OpenMode.ForWrite);
                        entity.Erase();
                    }
                }
                traction.Commit();
            }
            catch (Autodesk.AutoCAD.Runtime.Exception)
            {
               
            }
        }
    }
}