/***********************
* 说明：visio 事件处理类
* 创建人：姜棚
* 创建日期：
* 修改人：
* 修改日期：
* 修改备注：
* 版本：1.0.0.0
***********************/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Office.Interop.Visio;
using System.Runtime.InteropServices;

namespace Lskj.Visio
{
    [ComVisible(true)]
    public sealed class EventSink : IVisEventProc
    {
        private int alertResponse;
        public Document eventDocument; //Visio文档对象 
        private Application eventApplication; //Visio应用程序对象 
        public delegate void VisioEventHandler(object sender, EventArgs e);
        public event VisioEventHandler OnTextEdit;      //文本编辑事件
        private const short visEvtAdd = -32768;
        public EventSink()
        {

        }

        [CLSCompliant(false)]
        public void AddAdvise(Application callingApplication, Document callingDocument)
        {
            // 保存应用程序对象，方便设置事件处理
            eventApplication = callingApplication;
            // 缓存AlertResponse 对象的值
            alertResponse = callingApplication.AlertResponse;
            // 保存文档对象，方便设置事件处理
            eventDocument = callingDocument;
            setAddAdvise();
            return;
        }

        /// <summary>
        /// 添加事件参数
        /// </summary>
        /// <param name="eventCode"></param>
        /// <param name="description"></param>
        private void addEventDescription(
            short eventCode,
            string description)
        {

            string key = Convert.ToString(eventCode,
                System.Globalization.CultureInfo.InvariantCulture);
            eventDescriptions.Add(key, description);
        }

        private System.Collections.Specialized.StringDictionary eventDescriptions;

        /// <summary>
        /// 每次事件调用函数
        /// </summary>
        /// <param name="eventCode"></param>
        /// <param name="source"></param>
        /// <param name="eventId"></param>
        /// <param name="eventSequenceNumber"></param>
        /// <param name="subject"></param>
        /// <param name="moreInfo"></param>
        /// <returns></returns>
        public object VisEventProc(short eventCode, object source, int eventId,
    int eventSequenceNumber, object subject, object moreInfo)
        {
            Application eventProcApplication = null;
            Document eventProcDocument = null;
            Shape eventShape = null;
            Selection subjectSelection = null;

            object result = null;

            // 获得传递过来的应用程序对象或者文档对象
            if (source is IVApplication)
            {
                eventProcApplication = (Microsoft.Office.Interop.Visio.Application)source;
            }
            else if (source is IVDocument)
            {
                eventProcDocument = (Document)source;
            }

            // 检查每个事件代码是否被处理了。事件代码是对象和事件动作的联合对象。
            // 仅当事件在SetAddAdvise方法里面增加后，事件会被发送到这里进行处理。
            switch (eventCode)
            {
                case (short)Microsoft.Office.Interop.Visio.VisEventCodes.
                    visEvtDoc + (short)Microsoft.Office.Interop.Visio.
                    VisEventCodes.visEvtDel:
                    break;

                case (short)Microsoft.Office.Interop.Visio.VisEventCodes.
                    visEvtShape + (short)Microsoft.Office.Interop.Visio.
                    VisEventCodes.visEvtDel:
                    break;
                // 形状Text 改变事件
                case (short)Microsoft.Office.Interop.Visio.VisEventCodes.visEvtCodeShapeBeforeTextEdit:
                    eventShape = (Shape)subject;
                    handleShapeExitTextEdit(eventShape);
                    break;
                case (short)Microsoft.Office.Interop.Visio.VisEventCodes.visEvtCodeShapeExitTextEdit:
                    eventShape = (Shape)subject;
                    handleShapeExitTextEdit(eventShape);
                    break;
                default:
                    break;
            }

            return result;
        }

        /// <summary>
        /// 查看是否包含指定的事件
        /// </summary>
        private bool IsContainEvent(EventList eventList, string eventTargetArgs)
        {
            foreach (Event oneEvent in eventList)
            {
                if (oneEvent.TargetArgs == eventTargetArgs)
                {
                    return true;
                }
            }
            return false;
        }

        /// <summary>
        /// 要添加事件就往这里加
        /// </summary>
        private void setAddAdvise()
        {
            const string sink = "";
            Event newEvent = null;

            EventList applicationEvents = eventApplication.EventList;
            EventList documentEvents = eventDocument.EventList;

            // Add the BeforeShapeDelete event.
            //AddAdvise(生成通知的事件,对对象上接收事件通知的 COM 接口的引用,可传参数,可传参数);
            documentEvents.AddAdvise(((short)Microsoft.Office.Interop.Visio.
                VisEventCodes.visEvtDel + (short)Microsoft.Office.Interop.
                Visio.VisEventCodes.visEvtShape),
                this, "", "");

            // Add the PageAdded event.
            documentEvents.AddAdvise((short)Microsoft.Office.Interop.Visio.
                VisEventCodes.visEvtPage + visEvtAdd,
                this, "", "");

            // Add the ShapeAdded event.
            documentEvents.AddAdvise((short)Microsoft.Office.Interop.Visio.
                VisEventCodes.visEvtShape + visEvtAdd,
            this, "", "");
            applicationEvents.AddAdvise((short)Microsoft.Office.Interop.Visio.VisEventCodes.visEvtCodeShapeExitTextEdit, this, "", "");
        }

        /// <summary>
        /// 该方法在形状添加后触发调用。
        /// 形状对象已经存在，因此可以在后续使用进行引用处理。
        /// 形状添加的实际处理过程，是在所有Visio事件处理完毕后进行。
        /// </summary>
        /// <param name="addedShape">待添加的形状对象</param>
        /// <summary>
        /// 形状文本退出修改的事件处理
        /// </summary>
        /// <param name="shape">形状对象</param>
        private void handleShapeExitTextEdit(Shape shape)
        {
            if (OnTextEdit != null)
            {
                OnTextEdit(shape, new EventArgs());
            }
        }
    }
}