ObjectArx学习笔记-创建多段线

1、创建一个工具类CTool。

Tool.h：

static ads_real GetWidth();
static int GetColorIndex();

Tool.cpp
ads_real CTool::GetWidth()
{
ads_real width = 0;
if(acedGetReal(_T(" 输入线宽："), &width)==RTNORM)
{
return width;
}
else
{
return 0;
}
}

int CTool::GetColorIndex()
{
int colorIndex = 0;
if(acedGetInt(_T("输入颜色索引值(0~256)："), &colorIndex) != RTNORM)
{
return 0;
}

while(colorIndex < 0 || colorIndex >256)
{
acedPrompt(_T("输入了错误的颜色索引值！"));
if(acedGetInt(_T("输入颜色索引值(0~256)"), &colorIndex) != RTNORM)
{
return 0;
}
}

return colorIndex;
}

2、添加命令AddPoly
实现代码如下：

static void qxzyAddPolyDynamicCommands_AddPoly(void)
{
// Add your code for command qxzyAddPolyDynamicCommands._AddPoly here
int colorIndex = 0;
ads_real width = 0;


int index = 2;
ads_point ptStart;

if(acedGetPoint(NULL, _T(" 输入第一点:"), ptStart) != RTNORM)
return;
ads_point ptPrevious,ptCurrent;
acdbPointSet(ptStart, ptPrevious);
AcDbObjectId polyId;

acedInitGet(NULL, _T("W C O"));
int rc = acedGetPoint(ptPrevious,
_T(" 输入下一点[宽度(W)/颜色(C)]<完成(O)>"), ptCurrent);
while(rc == RTNORM || rc == RTKWORD)
{
if(rc == RTKWORD)
{
ACHAR kword[20];
if(acedGetInput(kword)!=RTNORM)
return;
if(strcmp((LPSTR)(LPCTSTR)kword,"W")==0)
{
width = CTool::GetWidth();
}
else if(strcmp((LPSTR)(LPCTSTR)kword,"C")==0)
{
colorIndex = CTool::GetColorIndex();
}
else if(strcmp((LPSTR)(LPCTSTR)kword, "O")==0)
{
return;
}
else
{
acutPrintf(_T(" 无效的关键字"));
}
}
else if(rc == RTNORM)
{
if(index == 2)
{
AcDbPolyline *pPoly= new AcDbPolyline(2);
AcGePoint2d ptGe1,ptGe2;
ptGe1[X]=ptPrevious[X];
ptGe1[Y]=ptPrevious[Y];
ptGe2[X]=ptCurrent[X];
ptGe2[Y]=ptCurrent[Y];
pPoly->addVertexAt(0, ptGe1);
pPoly->addVertexAt(1, ptGe2);

pPoly->setConstantWidth(width);
pPoly->setColorIndex(colorIndex);

AcDbBlockTable *pBlkTbl;
acdbHostApplicationServices()->workingDatabase()
->getSymbolTable(pBlkTbl, AcDb::kForRead);

AcDbBlockTableRecord *pBlkTblRcd;
pBlkTbl->getAt(ACDB_MODEL_SPACE, pBlkTblRcd, AcDb::kForWrite);

pBlkTblRcd->appendAcDbEntity(polyId, pPoly);

pBlkTblRcd->close();
pBlkTbl->close();
pPoly->close();

}
else if(index>2)
{
AcDbPolyline *pPoly;
acdbOpenObject(pPoly, polyId, AcDb::kForWrite);

AcGePoint2d ptGe;
ptGe[X]=ptCurrent[X];
ptGe[Y]=ptCurrent[Y];

pPoly->addVertexAt(index-1,ptGe);
pPoly->setConstantWidth(width);
pPoly->setColorIndex(colorIndex);

pPoly->close();
}
index++;

acdbPointSet(ptCurrent,ptPrevious);
}

acedInitGet(NULL, _T("W C O"));
rc = acedGetPoint(ptPrevious,
_T(" 输入下一点[宽度(W)/颜色(C)]<完成(O)>"), ptCurrent);
}


}