sample/database/test_dg

//////////////////////////////////////////////////////////////////////////////
//
//  Copyright 2021 Autodesk, Inc.  All rights reserved.
//
//  Use of this software is subject to the terms of the Autodesk license 
//  agreement provided at the time of installation or download, or which 
//  otherwise accompanies this software in either electronic or hard copy form.   
//
//////////////////////////////////////////////////////////////////////////////
//
//  testdb.cpp



#if defined(_DEBUG) && !defined(AC_FULL_DEBUG)

#error _DEBUG should not be defined except in internal Adesk debug builds

#endif

#include <Windows.h>

#include "rxregsvc.h"

#include "aced.h"

#include "dbsymtb.h"

#include "adslib.h"

#include "dbents.h"

#include "tchar.h"







// THE FOLLOWING CODE APPEARS IN THE SDK DOCUMENT.



void

createDwg()

{
    //创建AcDbDatabase 指针
    AcDbDatabase *pDb = new AcDbDatabase();

  

    AcDbBlockTable *pBtbl;
    //从pDb中获取块表指针
    pDb->getSymbolTable(pBtbl, AcDb::kForRead);



    AcDbBlockTableRecord *pBtblRcd;
    //从pBtbl中获取当前模型控件块表记录指针
    pBtbl->getAt(ACDB_MODEL_SPACE, pBtblRcd,

        AcDb::kForWrite);

    pBtbl->close();


    //创建圆1 和 圆2
    AcDbCircle *pCir1 = new AcDbCircle(AcGePoint3d(1,1,1),

                                       AcGeVector3d(0,0,1),

                                       1.0),

               *pCir2 = new AcDbCircle(AcGePoint3d(4,4,4),

                                       AcGeVector3d(0,0,1),

                                       2.0);


    //添加到块表记录中
    pBtblRcd->appendAcDbEntity(pCir1);
    //close圆1
    pCir1->close();

    
    //添加到块表记录中
    pBtblRcd->appendAcDbEntity(pCir2);
    //close圆1
    pCir2->close();
    //关闭块表记录
    pBtblRcd->close();

    // AcDbDatabase::saveAs() does NOT automatically
    // append a DWG file extension, so it
    // must be specified.
    //
    // 
    //保存database
    pDb->saveAs(_T("./test1.dwg"));
    //将pDb指针delete
    delete pDb;

}

void readDwg()
{

    // Set constructor parameter to kFalse so that the

    // database will be constructed empty.  This way only

    // what is read in will be in the database.

    //
    //将第一个参数值设为kFalse,这样就会创建一个空的数据库。
    AcDbDatabase *pDb = new AcDbDatabase(Adesk::kFalse);



    // The AcDbDatabase::readDwgFile() function

    // automatically appends a DWG extension if it is not

    // specified in the filename parameter.

    //

    //读取数据库
    if(Acad::eOk != pDb->readDwgFile(_T("./test1.dwg")))
        return;



    // Open the model space block table record.

    //
    //打开块表 只读 
    AcDbBlockTable *pBlkTbl;
    pDb->getSymbolTable(pBlkTbl, AcDb::kForRead);


    //打开模型空间块表记录 只读
    AcDbBlockTableRecord *pBlkTblRcd;

    pBlkTbl->getAt(ACDB_MODEL_SPACE, pBlkTblRcd,

        AcDb::kForRead);

    pBlkTbl->close();


    //创建块表记录遍历器 遍历块表记录的每一个图元
    AcDbBlockTableRecordIterator *pBlkTblRcdItr;

    pBlkTblRcd->newIterator(pBlkTblRcdItr);



    AcDbEntity *pEnt;

    for (pBlkTblRcdItr->start(); !pBlkTblRcdItr->done();

        pBlkTblRcdItr->step())

    {
        //获取图元实体
        pBlkTblRcdItr->getEntity(pEnt,

            AcDb::kForRead);
        //输出图元的类名
        acutPrintf(_T("classname: %s\n"),

            (pEnt->isA())->name());
        //关闭图元
        pEnt->close();

    }

    pBlkTblRcd->close();

    delete pBlkTblRcdItr;

    delete pDb;

}



// END CODE APPEARING IN SDK DOCUMENT.


//初始化app 注册命令
void

initApp()

{

    acedRegCmds->addCommand(_T("ASDK_DWG_COMMANDS"),

        _T("ASDK_CREATE"), _T("CREATE"), ACRX_CMD_MODAL, createDwg);



    acedRegCmds->addCommand(_T("ASDK_DWG_COMMANDS"),

        _T("ASDK_READ"), _T("READ"),  ACRX_CMD_MODAL, readDwg);

}


//卸载app 注销命令
void

unloadApp()

{

    acedRegCmds->removeGroup(_T("ASDK_DWG_COMMANDS"));

}


//arx的函数入口点 从此进入arxS
extern "C" AcRx::AppRetCode
acrxEntryPoint(AcRx::AppMsgCode msg, void* appId)

{

    switch (msg) {

    case AcRx::kInitAppMsg:

        acrxDynamicLinker->unlockApplication(appId);

		acrxDynamicLinker->registerAppMDIAware(appId);

        initApp();

        break;

    case AcRx::kUnloadAppMsg:

        unloadApp();

    }

    return AcRx::kRetOK;

}