How to display sub-entity's properties in Property Palette?

[Anonymous]

How to display sub-entity's properties in Property Palette? I had tryed to run SubEntity sample in autocad2007/8/9,but Property Palette can't display the properties of the sub-entity selected.

Thanks a lot!

[Balaji_Ram]

Sorry, This is a known issue.

To my understanding, the sample was not fixed.

[Anonymous]

Thanks for you reply.

Can you tell me the other method to display sub-entity's properties in Property Palette?

[Balaji_Ram · Accepted solution]

Hi,

Sorry for the delay.

I was searching for a fixed version of that sample and finally found it. Thanks to my colleague Gopinath Taget who got this sample working with help from the engineering team.

Here are the changes and the sample project :

<<<<

The key is to inherit from IAcadSubEntity in the IDL file for your interface:

interface ICrank : IAcadSubEntity

And in the implementation header, Inherit from the IAcadBaseSubEntityImpl and IOPMPropertyExtensionImpl templates like this:

//----- CCrank

class ATL_NO_VTABLE CCrank :

public CComObjectRootEx<CComSingleThreadModel>,

public CComCoClass<CCrank, &CLSID_Crank>,

public ISupportErrorInfo,

public IAcadBaseSubEntityImpl<CCrank, &CLSID_Crank, ICrank, &IID_ICrank, &LIBID_AsdkSliderCrankDbLib>,

public IOPMPropertyExtensionImpl<CCrank>

Also make sure that the inherted templates are properly mapped like this:

BEGIN_COM_MAP(CCrank)

COM_INTERFACE_ENTRY(ICrank)

COM_INTERFACE_ENTRY(IDispatch)

COM_INTERFACE_ENTRY(ISupportErrorInfo)

COM_INTERFACE_ENTRY(IConnectionPointContainer)

COM_INTERFACE_ENTRY(IRetrieveApplication)

COM_INTERFACE_ENTRY(IAcadSubEntity)

COM_INTERFACE_ENTRY(IAcadBaseSubEntity)

COM_INTERFACE_ENTRY(IOPMPropertyExtension)

END_COM_MAP()

Finally, implement the GetResourceInstance and GetDisplayName methods of the IOpmPropertyExtension/IOpmPropertyExtensionImpl interfaces like this:

virtual HINSTANCE GetResourceInstance()

{

HINSTANCE hi = _AtlBaseModule.GetResourceInstance();

HINSTANCE dllHi = _hdllInstance;

return hi;

}

STDMETHODIMP GetDisplayName(

DISPID dispID,

BSTR *pBstr)

{

if (dispID == 0x401) { // magic dispID meaning object itself

if (pBstr==NULL)

return E_POINTER;

*pBstr = ::SysAllocString(L"TheCrank");

return S_OK;

}

return IOPMPropertyExtensionImpl<CCrank>::GetDisplayName(

dispID, pBstr);

}

The proper implementation of GetDisplayName method is vital for the subentity OPM to work.

I am attaching the sample with these modifications to the Crank subentity. Similar modifications need to be made to the other sub entities as well.

>>>>

[Anonymous]

Your code has resolved my question.

Thanks a lot.