topic Re: Change focus event in Archicad C++ API

Change focus event

Emkave — Fri, 14 Feb 2025 08:26:29 GMT

Hello. I am trying to implement one algorithm but for that I need somehow to detect that you have opened a certain window in Archicad that changes the focus of the application to that window, for ex. a modal dialogue or windows such as those:

I guess you got it. Do you know any Archicad API command that could help detecting such focus changes? I have been searching for that command, however, I am either blind or the command does not exist. Thank you in advance!

Operating system used: Windows 11

Re: Change focus event

Miklos Vegh — Mon, 09 Dec 2024 13:20:09 GMT

Hi, there is a function in the DG.h header file:

DG_DLL_EXPORT bool CCALL DGIsInModalState (void);

This can be used to decide whether a modal dialog is open or not.

And if you attach to the DG::ApplicationObserver, you will be notified about modal state change.

class DG_DLL_EXPORT ApplicationObserver: public GS::EventObserver { ... virtual void ModalStateBegin (void); virtual void ModalStateEnd (void); ... public: ApplicationObserver (); virtual ~ApplicationObserver (); };

Re: Change focus event

Emkave — Tue, 31 Dec 2024 19:25:31 GMT

Hi. Thank you for the help. I suppose those functions should be overridden and are invoked by Archicad itself, right? Shouldn't I somehow attach it to Archicad or? I just added the solution to the code, and put a breakpoint to debug, but nothing happened. None of those functions were invoked by Archicad or anything else. In the screenshots you will see some of my attempts to invoke the functions by overriding or defining them, however nothing happened.

Re: Change focus event

Miklos Vegh — Thu, 02 Jan 2025 09:40:12 GMT

You should implement a new class having the DG::ApplicationObserver as a base, this way inheriting the virtual notification functions which will be overridden. Then you attach the instance of your class to the DG::Application (which is a DG::EventSource). When the events emerge, DG::Application (the EventSource) will call the overridden virtual functions in your attached observer class. You can try something like this:

class AppObserver: public DG::ApplicationObserver { private: bool isInModalState = false; public: AppObserver (); ~AppObserver (); bool IsInModalState () const; protected: virtual void ModalStateBegin (void) override; virtual void ModalStateEnd (void) override; }; AppObserver::AppObserver () { DG::Application::GetInstance ()->Attach (*this); } AppObserver::~AppObserver () { DG::Application::GetInstance ()->Detach (*this); } bool IsInModalState () const { return isInModalState; } void AppObserver::ModalStateBegin (void) { isInModalState = true; } void AppObserver::ModalStateEnd (void) { isInModalState = false; }

(I did not try to compile these lines).

Re: Change focus event

Emkave — Thu, 02 Jan 2025 10:21:40 GMT

Thank you for the solution! It really helped!