How to display values other than double in OPM when using element grouping?

[maisoui]

Hi,

I created a COM wrapper to display properties of my custom entity property palette. My entity contains several points and for each point, you can define a string. So I use GetGroupCount and GetElementGrouping to display a property with a spin control to go to previous or next point (similar to vertex property of AcDbPolyline). So for each point, it will display X, Y and Z values of the position and normally the text. But, it seems like when I'm using element grouping, only double values are understood. I tried to display string or bool, but it doesn't work:

varOut->vt = VT_BOOL;
varOut->boolVal = TRUE;

or

varOut->vt = VT_BSTR;
varOut->bstrVal = ::SysAllocString(_T("TEST"));

or

BSTR str = T2BSTR(_T("TEST"));
*varOut = CComVariant(str);

 Does anyone have a suggestion?

Regards,

[Anonymous]

see if this helps:

http://adndevblog.typepad.com/autocad/2012/12/how-to-create-a-polyline-like-vertex-edit-with-a-spin-...

[maisoui]

Yes, it could have been. Problem, this sample only displays double values...

[Balaji_Ram · Accepted solution]

Hi Jonathan,

Sorry, the "IOPMPropertyExpander" is only capable of handling doubles.

You will find this in the documentation on "IOPMPropertyExpander" :

<<<

Note As of this writing, this interface is used only for point properties whose type is a VARIANT that contains a SAFEARRAY of doubles.

>>>

Regards,

Balaji

[maisoui]

Hi Balaji,

Sorry, I missed that. Situation is now clear (I will try to find a workaround). Thank you.

Regards,

Jonathan