InDesign C++ SDK: How to Programmatically Create or Resize Primary Text Frame?

Question

I’m currently working on a project that involves programmatically resizing the primary text frame in Adobe InDesign, and in some cases, creating one if it doesn’t already exist. I’ve reviewed the InDesign C++ SDK documentation, but I haven’t found any clear guidance or relevant interfaces that address how to create or resize the primary text frame using the SDK.

Could someone please clarify:

Is it possible to programmatically create or resize the primary text frame using the InDesign C++ SDK?
If so, which interfaces and methods should be used to accomplish this?

Any examples, pointers, or references to relevant SDK classes or sample code would be greatly appreciated.

Thank you!

Manan Joshi · Accepted Answer

You can use the kSetPrimaryTextFlowCmdBoss to make a textframe present on a parent page as primary textframe. The itemlist of this command would be set with the kMasterPagesBoss and the IFlowData interface needs to be set with the story ref. The following code should work

UIDRef GetStoryFromFrame(UIDRef& frameRef){
	UIDRef toReturn = UIDRef::gNull;
	do
	{
		if(frameRef == UIDRef::gNull)
			break;

		InterfacePtr<IGraphicFrameData> iGraphicFrameData(frameRef, UseDefaultIID());
		ASSERT(iGraphicFrameData);
		if(!iGraphicFrameData)
			break;

		InterfacePtr<IMultiColumnTextFrame> iMultiColumnTextFrame(frameRef.GetDataBase(),iGraphicFrameData->GetTextContentUID(), UseDefaultIID());
		ASSERT(iMultiColumnTextFrame);
		if(!iMultiColumnTextFrame)
			break;

		InterfacePtr<ITextModel> iTextModel(iMultiColumnTextFrame->QueryTextModel());
		ASSERT(iTextModel);
		if(!iTextModel)
			break;

		toReturn = ::GetUIDRef(iTextModel);
	}while(kFalse);
	return toReturn;
}

ErrorCode SetFramePrimaryTextFrame(UIDRef &frameRef){
	ErrorCode status = kFailure;
	do{
		if(frameRef == UIDRef::gNull)
			break;
		
		InterfacePtr<IHierarchy> iHierarchy(frameRef, UseDefaultIID());
		ASSERT(iHierarchy);
		if (!iHierarchy)
			break;

		InterfacePtr<ISpread> iSpread(Utils<IPasteboardUtils>()->QuerySpread(iHierarchy));
		ASSERT(iSpread);
		if (!iSpread)
			break;

		if(!Utils<ILayoutUtils>()->IsAMaster(::GetUID(iSpread), ::GetDataBase(iSpread)))
		   break;

		UIDRef storyRef = GetStoryFromFrame(frameRef);
		if(storyRef == UIDRef::gNull)
			break;

		InterfacePtr<ICommand> iCommand(CmdUtils::CreateCommand(kSetPrimaryTextFlowCmdBoss));
		ASSERT(iCommand);
		if (!iCommand)
			break;

		iCommand->SetItemList(::GetUIDRef(iSpread));
		InterfacePtr<IFlowData> iFlowData(iCommand, UseDefaultIID());
		ASSERT(iFlowData);
		if (!iFlowData)
			break;

		iFlowData->SetPrimaryTextFlowStory(storyRef.GetUID());
		CmdUtils::ProcessCommand(iCommand);
	}while(kFalse);
	return status;
}

-Manan

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