Sending NPPM_SWITCHTOFILE command freeze npp

Gregory D.

Hello, I’m trying to swith to a specific file tab by sending the NPPM_SWITCHTOFILE command with the full local path, but it makes notepad++ unresponsive.
This is my code:

wstring localpath=L"c:\\test.txt";

int which = -1;
::SendMessage(nppData._nppHandle, NPPM_GETCURRENTSCINTILLA, 0, (LPARAM)&which);
if (which == -1)
	return;

HWND curScintilla = (which == 0) ? nppData._scintillaMainHandle : nppData._scintillaSecondHandle;

::SendMessage(curScintilla, NPPM_SWITCHTOFILE, 0, (LPARAM)localpath.c_str());

(SendMessage returns 0)

What’s the problem with my code ? I don’t find example of how to call this command.
THanks

PeterJones

My guess is it’s because you are sending a Notepad++ message to one of the Scintilla windows, instead of to Notepad++ itself.

Try:

::SendMessage(nppData._nppHandle, NPPM_SWITCHTOFILE, 0, (LPARAM)localpath.c_str());

As a reminder, all Notepad++ messages start with NPPM_, and go to the NPP handle. Scintilla messages start with SCI_ and go to one of the Scintilla handles.

For future reference, the Notepad++ messages are officially documented at https://npp-user-manual.org/docs/plugin-communication/ … though @Ekopalypse just did a revamp which is available at github but not yet on the official site.

Though the docs wouldn’t have been the Rubber Duck that I provided. :-)

Alan Kilborn

I don’t think this was a “rubber duck” issue.
Why?
Because if the rubber duck method had been used by the OP, the OP probably would have realized the mistake while talking to the duck, and a posting never would have been created.

Gregory D.

Don’t know anything about the rubber duck, but thank you this was the problem, thank you !

Alan Kilborn

@Gregory-D said in Sending NPPM_SWITCHTOFILE command freeze npp:

Don’t know anything about the rubber duck

Probably should learn about the duck.
He’s helpful.
:-)

PeterJones

@Alan-Kilborn said in Sending NPPM_SWITCHTOFILE command freeze npp:

would have realized the mistake while talking to the duck

Yeah, probably not technically a rubber duck. But a second set of eyes helps, too. ;-)

Gregory D.

@PeterJones I checked wikipedia, now I understand the method and already used it without knowing :-)