[求助]获得CAD当前活动图形的基本信息的大体思路？

zidane_mt 发表于 2008-7-7 09:06:00

本帖最后由作者于 2008-7-7 9:08:04 编辑 如题。新手求助。。       我的问题是假如我在CAD中画了一条线，那么我如何通过ARX程序获得它的图层，线性，颜色，线宽等基本信息呢？即如何从当前的块表记录获得相关对象的ObjectID呢？        再扩展一下，假如是读取一个块对象的信息的话，如果用Iterator来实现的话，那么相关对象的类型判断如何解决呢？       只求一个思路（如解决办法，相关函数，变量等），谢谢!    :-)

zhang007 发表于 2008-7-9 09:32:00

首先是你想怎样使用这条线的信息，如果仅仅是想显示出来，就看看这个ObjectARX 2004\samples\entity\MultilineTooltipSamp\MultilineTooltipSamp.vcproj代码贴上来，让你看的眼花：CSampleIPM::CSampleIPM(const bool storeInDocVars, AcApDocument* pDoc) {  if (storeInDocVars) {  assert(gDocVars.docData(pDoc).m_pIPM == NULL);  m_pDoc = pDoc;   m_pDoc->inputPointManager()->addPointMonitor(this);   gDocVars.docData().m_pIPM = this; } else   m_pDoc = NULL; }CSampleIPM::~CSampleIPM() {  if (m_pDoc)   if (gDocVars.docData(m_pDoc).m_pIPM) {    m_pDoc->inputPointManager()->removePointMonitor(this);    gDocVars.docData(m_pDoc).m_pIPM = NULL;   } }bool CSampleIPM::excludeFromOsnapCalculation(const AcArray<AcDbObjectId>& nestedEntity,                                     int gsSelectionMark) {   return false; } // // This is where we take advantage of quite a bit of information // provide by this big function to display multiline tooltip // (new feature in Acad 2002) under the cursor aperture. // // It gets even more interesting when you mix it with OSNAP info. // // Have fun! // Acad::ErrorStatus CSampleIPM::monitorInputPoint(   bool& bAppendToTooltipStr,      char*& pAdditionalTooltipString,      AcGiViewportDraw* pDrawContext,      AcApDocument* pDocument,      bool pointComputed,      int history,      const AcGePoint3d& lastPoint,      const AcGePoint3d& rawPoint,      const AcGePoint3d& grippedPoint,      const AcGePoint3d& cartesianSnappedPoint,      const AcGePoint3d& osnappedPoint,      AcDb::OsnapMask osnapMask,      const AcArray<AcDbCustomOsnapMode*>& customOsnapModes,      AcDb::OsnapMask osnapOverrides,      const AcArray<AcDbCustomOsnapMode*>& customOsnapOverrides,      const AcArray<AcDbObjectId>& apertureEntities,      const AcArray< AcDbObjectIdArray,      AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedApertureEntities,      const AcArray<int>& gsSelectionMark,      const AcArray<AcDbObjectId>& keyPointEntities,      const AcArray< AcDbObjectIdArray,      AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedKeyPointEntities,      const AcArray<int>& keyPointGsSelectionMark,      const AcArray<AcGeCurve3d*>& alignmentPaths,      const AcGePoint3d& computedPoint,      const char* pTooltipString) {  char mtooltipStr,    tempStr;  mtooltipStr = '\0'; Acad::ErrorStatus es;  AcDbEntity* pEnt;  AcDbObjectId highlightId = AcDbObjectId::kNull; if (pointComputed)  {   //   // Analyze the aperture entities.   //   if (apertureEntities.length() > 0)   {    if(strlen(mtooltipStr) > 0)     strcpy(mtooltipStr, "\nEntities under the cursor aperture:");    else     strcpy(mtooltipStr, "Entities under the cursor aperture:");   for (int i = 0; i < apertureEntities.length(); ++i)    {     if (Acad::eOk != (es = acdbOpenAcDbEntity(pEnt, apertureEntities, AcDb::kForRead)))      continue;     sprintf(tempStr, "\n  %s%s%d%s", pEnt->isA()->name(), " <Object ID: ", pEnt->objectId(), ">");      strcat(mtooltipStr, tempStr);      pEnt->close();     // Analyze the nested aperture entities.      AcDbObjectIdArray nestedIds = nestedApertureEntities;      int length = nestedIds.length();      if (length > 1)      {       // There is a nested entitiy: get it.       AcDbEntity* pEnt2;       if (Acad::eOk == (es = acdbOpenAcDbEntity(pEnt2, nestedIds, AcDb::kForRead))) {        sprintf(tempStr, "\n  nested: %s", pEnt2->isA()->name());        strcat(mtooltipStr, tempStr);        pEnt2->close();       }      }    }    highlightId = apertureEntities;   }  //   // Analyze OSNAP.   //  if (history && Acad::eOsnapped)   {    char osnapInfo;    osnapInfo = '\0';   switch (osnapMask)    {    case AcDb::kOsMaskEnd:     strcpy(osnapInfo, "\nOsnap:\n  end");     break;    case AcDb::kOsMaskMid:     strcpy(osnapInfo, "\nOsnap:\n  mid");     break;    case AcDb::kOsMaskCen:     strcpy(osnapInfo, "\nOsnap:\n  center");     break;    case AcDb::kOsMaskNode:     strcpy(osnapInfo, "\nOsnap:\n  node");     break;    case AcDb::kOsMaskQuad:     strcpy(osnapInfo, "\nOsnap:\n  quadrant");     break;    case AcDb::kOsMaskInt:     strcpy(osnapInfo, "\nOsnap:\n  intersection");     break;    case AcDb::kOsMaskIns:     strcpy(osnapInfo, "\nOsnap:\n  insert");     break;    case AcDb::kOsMaskPerp:     strcpy(osnapInfo, "\nOsnap:\n  perpendicular");     break;    case AcDb::kOsMaskTan:     strcpy(osnapInfo, "\nOsnap:\n  tangent");     break;    case AcDb::kOsMaskNear:     strcpy(osnapInfo, "\nOsnap:\n  near");     break;    case AcDb::kOsMaskQuick:     strcpy(osnapInfo, "\nOsnap:\n  quick");     break;    case AcDb::kOsMaskApint:     strcpy(osnapInfo, "\nOsnap:\n  apint");     break;    case AcDb::kOsMaskImmediate:     strcpy(osnapInfo, "\nOsnap:\n  immediate");     break;   case AcDb::kOsMaskAllowTan:     strcpy(osnapInfo, "\nOsnap:\n  allowTan");     break;    case AcDb::kOsMaskDisablePerp:     strcpy(osnapInfo, "\nOsnap:\n  DisablePerp");     break;    case AcDb::kOsMaskRelCartesian:     strcpy(osnapInfo, "\nOsnap:\n  RelCartesian");     break;    case AcDb::kOsMaskRelPolar:     strcpy(osnapInfo, "\nOsnap:\n  RelPolar");     break;    }    if (strlen(osnapInfo))    {     if (keyPointEntities.length())     {      strcat(osnapInfo, "\nKey entities:");      for (int i=0; i<keyPointEntities.length(); ++i)      {       if (Acad::eOk != (es = acdbOpenAcDbEntity(pEnt, keyPointEntities, AcDb::kForRead)))        continue;      sprintf(tempStr, "\n    %s", pEnt->isA()->name());       strcat(osnapInfo, tempStr);       pEnt->close();      }     }    }    strcat(mtooltipStr, osnapInfo);   }  } //  // Do highlighting, only the top level entity is highlighted.  //  static AcDbObjectId oldHighlightId = AcDbObjectId::kNull;  if(highlightId != oldHighlightId)  {   if (AcDbObjectId::kNull != oldHighlightId)   {    es = acdbOpenAcDbEntity(pEnt, oldHighlightId, AcDb::kForRead);    if (es == Acad::eOk)    {     es = pEnt->unhighlight();     pEnt->close();     oldHighlightId = AcDbObjectId::kNull;    }   }   es = acdbOpenAcDbEntity(pEnt, highlightId, AcDb::kForRead);   if (es == Acad::eOk)   {    es = pEnt->highlight();    pEnt->close();    oldHighlightId = highlightId;   }  } // Turn on additional tooltip.  bAppendToTooltipStr = true;  pAdditionalTooltipString = mtooltipStr;  return Acad::eOk; }void MTooltipOn() {   if (!gDocVars.docData().m_pIPM)     new CSampleIPM; }void MTooltipOff() {   if (gDocVars.docData().m_pIPM)     delete gDocVars.docData().m_pIPM; }// Init this application. Register your // commands, reactors... void InitApplication() {  acedRegCmds->addCommand("ASDK", "MTOOPTIPON", "MTON", ACRX_CMD_MODAL, MTooltipOn);  acedRegCmds->addCommand("ASDK", "MTOOPTIPOFF", "MTOFF", ACRX_CMD_MODAL, MTooltipOff); acutPrintf("\nCommands are: MTOOPTIPON (MTON) and MTOOPTIPOFF (MTOFF).");  MTooltipOn();  acutPrintf("\nSample multiline tooltip is on."); }

liub1979 发表于 2009-5-24 12:42:00

该程序不是很稳定如果用鼠标在窗口中快速移动经常会莫名奇妙自动退出！而且没有任何提示！

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[求助]获得CAD当前活动图形的基本信息的大体思路？