光标提示实体信息(EntInfoTip)

LoveArx

基本思路：

（1） 创建一个新工程EntInfoTip.

添加一个从AcEdInputPointMonitor类继承的类CEntInfoTipHandler.

类CEntInfoTipHandler的头文件实现代码：

[C++] 纯文本查看 复制代码

class CEntInfoTipHandler :
        public AcEdInputPointMonitor
{
public:
        CEntInfoTipHandler(const bool storeInDocVars = true,AcApDocument* pDoc
         = curDoc());
        virtual ~CEntInfoTipHandler();

        //计算需要从自动捕捉中排除的实体
        virtual bool excludeFromOsnapCalculation(const AcArray<AcDbObjectId>&
                nestedEntity, int gsSelectionMark);

        //监控输入点信息
        virtual Acad::ErrorStatus monitorInputPoint(
                bool& bAppendToTooltipStr,
                TCHAR*& pAdditionalTooltipString,
                AcGiViewportDraw* pDrawContext,
                AcApDocument* pDocument,
                bool pointComputed,
                int history,
                const AcGePoint3d& lastPoint,
                const AcGePoint3d& rawPoint,
                const AcGePoint3d& grippedPoint,
                const AcGePoint3d& cartesianSnappendPoint,
                const AcGePoint3d& osnapppendPoint,
                AcDb::OsnapMask osnapMask,
                const AcArray<AcDbCustomOsnapMode*>& customOsnapModes,
                AcDb::OsnapMask osnapOverrides,
                const AcArray<AcDbObjectId>& customOsnapOverrides,
                const AcArray<AcDbObjectId>& apertureEntitise,
                const AcArray<AcDbObjectIdArray,
                AcArrayObjectCopyReallocator<AcDbObjectIdArray>>&
                nestedApertureEntities,
                const AcArray<int>& gsSelectionMark,
                const AcArray<AcDbObjectId>& keyPointEntities,
                const AcArray<AcDbObjectIdArray,
                AcArrayObjectCopyReallocator<AcDbObjectIdArray>>&nestedKeyPointEntities,
                const AcArray<int>& keyPointGetSelectionMark,
                const AcArray<AcGeCurve3d*>& aligmentPaths,
                const AcGePoint3d& computedPoint,
                const TCHAR* pTooltipString);

private:
        //指向这个对象所属的文档
        AcApDocument* m_pDoc;
};

2）在类CDocData的声明中添加CEntInfoTipHandler类型的成员变量：

[C++] 纯文本查看 复制代码

class CDocData {

        //----- TODO: here you can add your variables

public:
        CDocData () ;
        CDocData (const CDocData &data) ;
        ~CDocData () ;

        CEntInfoTipHandler* m_pIPM;
} ;

需要添加头文件：

[C++] 纯文本查看 复制代码

#include "EntInfoTipHandler.h"

3）CDocDate类的实现代码：

[C++] 纯文本查看 复制代码

AsdkDataManager<CDocData> DocVars;
//----- Implementation of the document data class.
CDocData::CDocData ():m_pIPM(NULL) {
}

//-----------------------------------------------------------------------------
CDocData::CDocData (const CDocData &data):m_pIPM(NULL){
}

//-----------------------------------------------------------------------------
CDocData::~CDocData () {
        if (m_pIPM)
        {
                delete m_pIPM;
        }
}

注意：要是 StdAfx.h 文件中已经定义 extern AcApDataManager<CDocData> DocVars ;  此时，DocVars已经被定义，所以你需要将 AsdkDataManager<CDocData> DocVars; 的变量名更换。

（4）在CEntInfoTipHandler类的构造函数中，为当前的图形文件添加输入点监视器：

[C++] 纯文本查看 复制代码

CEntInfoTipHandler::CEntInfoTipHandler(const bool storeInDocVars /*= true*/,
        AcApDocument* pDoc/*= curDoc()*/)
{
        if (storeInDocVars)
        {
                assert(DocVars.docData(pDoc).m_pIPM == NULL);
 
                //添加输入点监视器
                m_pDoc->inputPointManager()->addPointMonitor(this);
                DocVars.docData().m_pIPM = this;
        }
        else
        {
                m_pDoc = NULL;
        }
}

在当前cpp文件的开头添加下面的语句:

extern AsdkDataManager<CDocData> DocVars;
（5）在CEntInfoTipHandler类的构造函数中，删除当前文档的输入点监视器：

[C++] 纯文本查看 复制代码

CEntInfoTipHandler::~CEntInfoTipHandler()
{
        if (m_pDoc)
        {
                if (DocVars.docData(m_pDoc).m_pIPM)
                {
                        //删除输入点监视器
                        m_pDoc->inputPointManager()->removePointMonitor(this);
                        DocVars.docData(m_pDoc).m_pIPM = NULL;
                }
        }
}

（6）excludeFromOsnapCalculation函数的实现代码：

[C++] 纯文本查看 复制代码

bool CEntInfoTipHandler::excludeFromOsnapCalculation(
        const AcArray<AcDbObjectId>& nestedEntity, int gsSelectionMark)
{
        return false;
}

（7）monitorInputPoint函数的实现代码：

[C++] 纯文本查看 复制代码

Acad::ErrorStatus CEntInfoTipHandler::monitorInputPoint(
        bool& bAppendToTooltipStr,
        TCHAR*& pAdditionalTooltipString,
        AcGiViewportDraw* pDrawContext,
        AcApDocument* pDocument,
        bool pointComputed,
        int history,
 
        const AcGePoint3d& lastPoint,
        const AcGePoint3d& rawPoint,
        const AcGePoint3d& grippedPoint,
        const AcGePoint3d& cartesianSnappendPoint,
        const AcGePoint3d& osnapppendPoint,
 
        AcDb::OsnapMask osnapMask,
        const AcArray<AcDbCustomOsnapMode*>& customOsnapModes,
        AcDb::OsnapMask osnapOverrides,
        const AcArray<AcDbObjectId>& 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>& keyPointGetSelectionMark,
        const AcArray<AcGeCurve3d*>& aligmentPaths,
        const AcGePoint3d& computedPoint,
        const TCHAR* pTooltipString)
{
        //一定要注意检查缓冲区的大小，避免越界导致的Acad直接跳出
        TCHAR mtooltipStr[1024], tempStr[1024];
        mtooltipStr[0] = '\0';
 
        Acad::ErrorStatus es;
        AcDbEntity* pEnt;
        AcDbObjectId highlightId = AcDbObjectId::kNull;
 
        if (pointComputed)
        {
                //分析光标所覆盖的实体
                if (apertureEntities .length() > 0)
                {
                        for (int i = 0; i < apertureEntities.length(); i++)
                        {
                                //避免显示更多的实体(根据需要确定是否需要)
                                if (i > 0)
                                {
                                        break;
                                }
 
                                if (Acad::eOk != (acdbOpenAcDbEntity(pEnt, apertureEntities[i],
                                        AcDb::kForRead)))
                                {
                                        continue;
                                }
 
                                if (pEnt->isKindOf(AcDbLine::desc()))
                                {
                                        //实体类型信息
                                        if (_tcslen(mtooltipStr) > 0)
                                        {
                                                _tcscpy(mtooltipStr, TEXT("直线:"));
                                        }
                                        else
                                        {
                                                _tcscpy(mtooltipStr, TEXT("\n直线:"));
                                        }
 
                                        //实体详细信息
                                        AcDbLine* pLine = AcDbLine::cast(pEnt);
                                        double length = pLine->startPoint.distanceTo(pLine->
                                                endPoint());
                                        AcGeVector3d vec = pLine->endPoint() - pLine->startPoint();
                                        double angle = vec.convert2d(AcGePlane::kXYPlane).angle();
                                        _stprintf(tempStr, TEXT("\n 长度: %.2f \n 倾角 : %.2f"),
                                                length, RadianToAngle(angle));
                                }
                                else if (pEnt->isKindOf(AcDbCircle::desc()))
                                {
                                        //实体类型信息
                                        if (_tcslen(mtooltipStr) > 0)
                                        {
                                                _tcscpy(mtooltipStr, TEXT("\n圆:"));
                                        }
                                        else
                                        {
                                                _tcscpy(mtooltipStr, TEXT("\n圆:"));
                                        }
 
                                        //实体详细信息
                                        AcDbCircle* pCircle = AcDbCircle::cast(pEnt);
                                        double radius = pCircle->radius();
                                        double area = PI() * radius * radius;
                                        _stprintf(tempStr, TEXT("\n 半径: %.2f \n面积: %.2f"),
                                                radius, area);
                                        _tcscat(mtooltipStr, tempStr);
                                        
                                }
                                pEnt->close();
                        }
                        highlightId = apertureEntities[0];
                }
                
        }
 
        //执行高亮显示，只有在显示最顶层的实体会被高亮显示
        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;
                }
                //显示其他提示内容
                bAppendToTooltipStr = true;
                pAdditionalTooltipString = mtooltipStr;
 
                return Acad::eOk;
        }
}

RadianToAngle函数的实现：

[C++] 纯文本查看 复制代码

double CEntInfoTipHandler::RadianToAngle(double radian)
{
        return radian * 180 / CEntInfoTipHandler::PI();
}
 
double CEntInfoTipHandler::PI()
{
        return atan(1.0) * 4;
}

（8）注册新命令 EntTipOn

[C++] 纯文本查看 复制代码

if (!DocVars.docData().m_pIPM)
{
                        new CEntInfoTipHandler;
}

添加头文件：

[C++] 纯文本查看 复制代码

#include "EntInfoTipHandler.h"

别忘了声明DocVars:

[C++] 纯文本查看 复制代码

// 声明这个全局函数的定义在其他的obj中
extern AsdkDataManager<CDocData> DocVars;

添加AsdkDataManager的头文件：

[C++] 纯文本查看 复制代码

#include "AdskDMgr.h"

（9）注册新命令EntTipOff，关闭当前文档中实体信息动态显示的功能：

[C++] 纯文本查看 复制代码

if (DocVars.docData().m_pIPM)
{
        delete DocVars.docData().m_pIPM;
        DocVars.docData().m_pIPM = NULL;
}

（10）完整项目源代码

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Reference:

张帆《AutoCAD ObjectARX(VC)开发基础与实例教程》

edata

前天有个网友刚好问到我这个问题，就是用的这个源码，我发现高版本（CAD2008及其以上版本开始）更改了一个函数的参数类型
monitorInputPoint的const AcArray<int>& gsSelectionMark,和const AcArray<int>& keyPointGetSelectionMark,中的int类型均改为了Adesk::GsMarker，否则无法触发反应器，
我记得自定义实体中也有几处改成了Adesk::GsMarker的地方，我记得好像是捕捉的函数参数。

1. #if _MSC_VER>1400
   
2. Acad::ErrorStatus CEntInfoTipHandler::monitorInputPoint(
   
3.         bool& bAppendToTooltipStr,
   
4.         TCHAR*& pAdditionalTooltipString,
   
5.         AcGiViewportDraw* pDrawContext,
   
6.         AcApDocument* pDocument,
   
7.         bool pointComputed,
   
8.         int history,
   
9.         const AcGePoint3d& lastPoint,
   
10.         const AcGePoint3d& rawPoint,
    
11.         const AcGePoint3d& grippedPoint,
    
12.         const AcGePoint3d& cartesianSnappedPoint,
    
13.         const AcGePoint3d& osnappedPoint,
    
14.         AcDb::OsnapMask osnapMask,
    
15.         const AcArray<AcDbCustomOsnapMode*>& customOsnapModes,
    
16.         AcDb::OsnapMask osnapOverrides,
    
17.         const AcArray<AcDbCustomOsnapMode*>& customOsnapOverrides,
    
18.         const AcArray<AcDbObjectId>& apertureEntities,
    
19.         const AcArray< AcDbObjectIdArray,
    
20.         AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedApertureEntities,
    
21.         const AcArray<Adesk::GsMarker>& gsSelectionMark,
    
22.         const AcArray<AcDbObjectId>& keyPointEntities,
    
23.         const AcArray< AcDbObjectIdArray,
    
24.         AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedKeyPointEntities,
    
25.         const AcArray<Adesk::GsMarker>& keyPointGsSelectionMark,
    
26.         const AcArray<AcGeCurve3d*>& alignmentPaths,
    
27.         const AcGePoint3d& computedPoint,
    
28.         const TCHAR* pTooltipString)
    
29. #else
    
30. Acad::ErrorStatus CEntInfoTipHandler::monitorInputPoint(
    
31.         bool& bAppendToTooltipStr,
    
32.         TCHAR*& pAdditionalTooltipString,
    
33.         AcGiViewportDraw* pDrawContext,
    
34.         AcApDocument* pDocument,
    
35.         bool pointComputed,
    
36.         int history,
    
37.         const AcGePoint3d& lastPoint,
    
38.         const AcGePoint3d& rawPoint,
    
39.         const AcGePoint3d& grippedPoint,
    
40.         const AcGePoint3d& cartesianSnappedPoint,
    
41.         const AcGePoint3d& osnappedPoint,
    
42.         AcDb::OsnapMask osnapMask,
    
43.         const AcArray<AcDbCustomOsnapMode*>& customOsnapModes,
    
44.         AcDb::OsnapMask osnapOverrides,
    
45.         const AcArray<AcDbCustomOsnapMode*>& customOsnapOverrides,
    
46.         const AcArray<AcDbObjectId>& apertureEntities,
    
47.         const AcArray< AcDbObjectIdArray,
    
48.         AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedApertureEntities,
    
49.         const AcArray<int>& gsSelectionMark,
    
50.         const AcArray<AcDbObjectId>& keyPointEntities,
    
51.         const AcArray< AcDbObjectIdArray,
    
52.         AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedKeyPointEntities,
    
53.         const AcArray<int>& keyPointGsSelectionMark,
    
54.         const AcArray<AcGeCurve3d*>& alignmentPaths,
    
55.         const AcGePoint3d& computedPoint,
    
56.         const TCHAR* pTooltipString)
    
57. #endif
    

#if _MSC_VER>1400<br /> Acad::ErrorStatus CEntInfoTipHandler::monitorInputPoint(<br />         bool& bAppendToTooltipStr,<br />         TCHAR*& pAdditionalTooltipString,<br />         AcGiViewportDraw* pDrawContext,<br />         AcApDocument* pDocument,<br />         bool pointComputed,<br />         int history,<br />         const AcGePoint3d& lastPoint,<br />         const AcGePoint3d& rawPoint,<br />         const AcGePoint3d& grippedPoint,<br />         const AcGePoint3d& cartesianSnappedPoint,<br />         const AcGePoint3d& osnappedPoint,<br />         AcDb::OsnapMask osnapMask,<br />         const AcArray<AcDbCustomOsnapMode*>& customOsnapModes,<br />         AcDb::OsnapMask osnapOverrides,<br />         const AcArray<AcDbCustomOsnapMode*>& customOsnapOverrides,<br />         const AcArray<AcDbObjectId>& apertureEntities,<br />         const AcArray< AcDbObjectIdArray,<br />         AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedApertureEntities,<br />         const AcArray<Adesk::GsMarker>& gsSelectionMark,<br />         const AcArray<AcDbObjectId>& keyPointEntities,<br />         const AcArray< AcDbObjectIdArray,<br />         AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedKeyPointEntities,<br />         const AcArray<Adesk::GsMarker>& keyPointGsSelectionMark,<br />         const AcArray<AcGeCurve3d*>& alignmentPaths,<br />         const AcGePoint3d& computedPoint,<br />         const TCHAR* pTooltipString)<br /> #else<br /> Acad::ErrorStatus CEntInfoTipHandler::monitorInputPoint(<br />         bool& bAppendToTooltipStr,<br />         TCHAR*& pAdditionalTooltipString,<br />         AcGiViewportDraw* pDrawContext,<br />         AcApDocument* pDocument,<br />         bool pointComputed,<br />         int history,<br />         const AcGePoint3d& lastPoint,<br />         const AcGePoint3d& rawPoint,<br />         const AcGePoint3d& grippedPoint,<br />         const AcGePoint3d& cartesianSnappedPoint,<br />         const AcGePoint3d& osnappedPoint,<br />         AcDb::OsnapMask osnapMask,<br />         const AcArray<AcDbCustomOsnapMode*>& customOsnapModes,<br />         AcDb::OsnapMask osnapOverrides,<br />         const AcArray<AcDbCustomOsnapMode*>& customOsnapOverrides,<br />         const AcArray<AcDbObjectId>& apertureEntities,<br />         const AcArray< AcDbObjectIdArray,<br />         AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedApertureEntities,<br />         const AcArray<int>& gsSelectionMark,<br />         const AcArray<AcDbObjectId>& keyPointEntities,<br />         const AcArray< AcDbObjectIdArray,<br />         AcArrayObjectCopyReallocator< AcDbObjectIdArray > >& nestedKeyPointEntities,<br />         const AcArray<int>& keyPointGsSelectionMark,<br />         const AcArray<AcGeCurve3d*>& alignmentPaths,<br />         const AcGePoint3d& computedPoint,<br />         const TCHAR* pTooltipString)<br /> #endif<br />