CAD定义图块（网页版）

js将选中的实体做成块实现代码：

//实例化一个构造选择集进行过滤,该类封装了选择集及其处理函数。

var ss = mxOcx.NewSelectionSet();

//构造一个过滤链表

var spFilte = mxOcx.NewResbuf();

//用户选择对象  得到用户选取的实体

ss.Select2(8, null, null, null, spFilte);

 

var aryId = new Array();

for (var i = 0; i < ss.Count; i++)

{

    var ent = ss.Item(i);

    if (ent != null)

    {

        aryId.push(ent.ObjectID);

        ent.Close();

    }

}

//返回控件的数据库对象

var curDatabase =mxOcx.GetDatabase();

var dMinX = 0, dMinY = 0, dMaxX = 0, dMaxY = 0;

var isFirstEnt = true;

for (var l = 0; l < aryId.length; l++)

{

    var pObj = curDatabase.ObjectIdToObject(aryId[l]);

    if (pObj == null)

        continue;

    var pEnt = pObj;

    if (pEnt == null)

        continue;

    var  points = pEnt.GetBoundingBox2();

 

    var minPt = points.Item(0);

    var maxPt = points.Item(1);

 

    if (minPt != null && maxPt != null)

    {

        if(isFirstEnt)

        {

            dMinX = minPt.x;

            dMinY = minPt.y;

            dMaxX = maxPt.x;

            dMaxY = maxPt.y;

            isFirstEnt = false;

        }

        else

        {

            if (dMinX > minPt.x)

                dMinX = minPt.x;

 

            if (dMinY > minPt.y)

                dMinY = minPt.y;

 

            if (dMaxX < maxPt.x)

                dMaxX = maxPt.x;

 

            if (dMaxY < maxPt.y)

                dMaxY = maxPt.y;

        }

    }

}

 

if(isFirstEnt)

{

    // 没有实体

    return;

}

var pos = mxOcx.NewPoint();

pos.x = dMinX + (dMaxX - dMinX) / 2.0;

pos.y = dMinY + (dMaxY - dMinY) / 2.0;

 

// 检查新创建的块名，在当前数据库是否已经存在.

 

var blkTable = curDatabase.GetBlockTable();

var curSpace = curDatabase.CurrentSpace();

 

var sNewBlakName;

 

var blkNewRec = blkTable.Add("");

sNewBlakName = blkNewRec.Name;

 

blkNewRec.Origin = pos;

 

for (var l = 0; l < aryId.length; l++)

{

 

    blkNewRec.AddCloneEntity(aryId[l]);

    // 把以前实体删除 。

    var pObj = curDatabase.ObjectIdToObject(aryId[l]);

    if (pObj == null)

        continue;

    pObj.Erase();

}

if (blkNewRec != null)

{

    var blkRef = curSpace.InsertBlock(pos.x,pos.y, sNewBlakName, 1.0, 0.0);

    var attrib = blkRef.AppendAttribute();

    attrib.Position = pos;

    attrib.AlignmentPoint = pos;

    attrib.Oblique = 0.0;

    attrib.Rotation = 0.0;

    attrib.Height = 2.0;

    attrib.Tag = "TestTag";

    attrib.IsInvisible = false;

 

    blkRef.Position = blkRef.Position;

 

}

 

return;