CAD动态提示（c++）

CAD控件具有鼠标停在一个对象上，然后自动弹出一个提示信息窗口的功能。

C++接口	McEdInputPointMonitor::MonitorInputPointToolTip
设置提示时间	MxDraw::SetDynToolTipInitialTime
设置ToolTip自动提示隐藏时间	MxDraw::SetDynToolTipPopTime

McEdInputPointMonitor::MonitorInputPointToolTip方法

接口：

virtual Mcad::ErrorStatus MonitorInputPointToolTip(IN const McDbObjectIdArray& pickedEntities, IN const McGePoint3d& pickedPoint, IN CString& sNewToolTipString);

参数：

参数	说明
IN const McDbObjectIdArray& pickedEntities	当前光标下面的实体
IN const McGePoint3d& pickedPoint	光标位置
IN CString& sNewToolTipString	返回提示信息字符串

参考例子：MxDraw5.2\samples\Edit\Edit.sln中 InputPointMonitor.cpp 文件。代码如下：

Mcad::ErrorStatus CInputPointMonitor::MonitorInputPointToolTip(IN const McDbObjectIdArray& pickedEntities,
   IN const McGePoint3d& pickedPoint,
   IN CString& sNewToolTipString
   )
{
if(!pickedEntities.isEmpty())
{
AcDbObjectId entId = pickedEntities[0];
AcDbObjectPointer<AcDbEntity> spEnt(entId,AcDb::kForRead);
if(spEnt.openStatus() == Acad::eOk)
{
CString sClassName = spEnt->isA()->name();
 
AcDbHandle handle;
spEnt->getAcDbHandle(handle);
TCHAR szHandle[256];
handle.getIntoAsciiBuffer(szHandle);
 
CString sLayerName;
{
AcDbObjectPointer<AcDbLayerTableRecord> spLayerTableRec(spEnt->layerId(),AcDb::kForRead);
if(spLayerTableRec.openStatus() == Acad::eOk)
{
LPCTSTR pszLayerName = NULL;
spLayerTableRec->getName(pszLayerName);
sLayerName = pszLayerName;
}
}
 
sNewToolTipString.Format(_T("类名:%s,层名:%s,名柄:%s"),sClassName,sLayerName,szHandle);
}
}
return Mcad::eOk;
}