Slot function doesn't work when Compile the code

[Crisps]

Dear experts,

I found that when I use interactive ROOT to execute macro which contains TCanvas::HighlightConnect() it works fine, but with the same code (with additional main()) if I compile it first by root-config --cxx --cflags --libs -lMinuit2 then it will give the runtime error message:

Error in <TQObject::CheckConnectArgs>: slot DocaHighlighted(TVirtualPad*,TObject*,int,int) does not exist

why?

[bellenot]

GUI - Use external function in a widget

ROOT Version: 6.18/04 Platform: Ubuntu 18.04 Compiler: gcc 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04) Dear co-rooters, I’m building a GUI that will unpack some signals and then draw them. What I would like to do is connect a widget (i.e. a button) with external functions. I have divided my code to practically 3 parts: gui (.cxx, .h) in which a class MainFrame is defined, unpacker (.cxx, .h) which will unpack the signals and main (.cxx, .h) which will execute any functions. I compiled everything…

[Crisps]

Thank you, should I add parameters in the #pragma? Like #pragma link C++ function PosHighlighted(TVirtualPad* pad, TObject* obj, Int_t ihp, Int_t y)+;?

[bellenot]

Try

gInterpreter->Declare("void PosHighlighted(TVirtualPad* pad, TObject* obj, Int_t ihp, Int_t y);");

[Crisps]

It works! thank you