topic Re: Why null char[] checking not working? in Archicad C++ API

Why null char[] checking not working?

Newbie — Mon, 17 Jul 2023 20:13:25 GMT

I am try to put a condition checking for empty value of char[] as below code but still not working.

GS::Array<API_NavigatorItem> items; API_NavigatorItem item = {}; char str[128]; memset(str, '\0', sizeof(str)); item.guid = guid; item.mapId = mapId; //NavigatorPaletteTestGlobals::GetInstance().GetNavigatorMapID(); GSErrCode err = ACAPI_Navigator(APINavigator_GetNavigatorChildrenItemsID, &item, nullptr, &items); if (err != NoError) return; for (API_NavigatorItem& childItem : items) { if (GS::UniString(childItem.uiId).ToCStr().Get() != NULL) { ACAPI_WriteReport("Value >>%s<>%s =>%i", true, GS::UniString(childItem.uiId).ToCStr().Get(), GS::UniString(str).ToCStr().Get(),childItem.isIndependent); } }

Appreciated for any help to fix this issue.

Re: Why null char[] checking not working?

BerndSchwarzenbacher — Mon, 10 Jul 2023 06:44:23 GMT

I think this condition

GS::UniString(childItem.uiId).ToCStr().Get() != NULL

will never be true, since you are creating an UniString object right there and this will have a pointer existing.

It's a bit unclear what exactly you want to achieve.

Maybe you need this?

!GS::UniString(childItem.uiId).IsEmpty()

Re: Why null char[] checking not working?

Newbie — Mon, 10 Jul 2023 08:24:29 GMT

Hello bschwb,

Actually I want to list the viewmap of navigator and check whether the item can be deleted or not as below picture but still can't find our the way.

Not sure you have any suggestion or not.

Thanks in advance.

Re: Why null char[] checking not working?

BerndSchwarzenbacher — Tue, 11 Jul 2023 11:31:09 GMT

Which ones in the picture do you want to delete?

Re: Why null char[] checking not working?

Newbie — Tue, 11 Jul 2023 14:24:30 GMT

Hello bschwb,

From the given picture, if you select 'Floor Plans' then you can delete, but it's sub items such as story 1 you can't delete. I still can't find way to check whether the selected item can or can not delete from API function.

Thanks.

Re: Why null char[] checking not working?

BerndSchwarzenbacher — Tue, 11 Jul 2023 19:53:43 GMT

OK now I think I've understood. And I've tested it a bit.
It seems that you can't delete items which are part of a cloned folder as you've found out.
The cloned folders have itemType = API_UndefinedNavItem.

So you could check if an items parent has this item type.

To get an items parent you can use APINavigator_GetNavigatorParentItemID.

Hope that helps!

Re: Why null char[] checking not working?

Newbie — Wed, 12 Jul 2023 02:49:45 GMT

Hello bschwb,

You're right, It does what I am looking.

Thanks for suggestion.