How to launch an instance of the app already running? Topic is solved

[Louigi Verona]

I would like to fire up another instance of the app by, say, pressing a key. Is that possible and if yes - then how? I did search the forum and wiki and documentation. Found wxExecute, but I am not sure this is the right thing.

[Auria]

Your app, or any app?

[Louigi Verona]

My app - the app that I am currently running. For instance, I am running Notepad and from within Notepad I want to be able to press a key and another Notepad opens.

[Romas]

If the working platform is Windows, all you need is to hook keyboard events (you still need a monitoring program to handle that hook [your program can do this too]). But, if you need multiplatform thing I am out of ideas

[Louigi Verona]

Yeah, I need multiplatform. Funny if this is not possible - seems like simple functionality.

[doublemax]

if you just want to start your own application from your own code again:

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::wxExecute( wxGetApp().argv[0] );

But you must take care of resources that are used multiple times, like configuration files etc. so that the instances don't conflict with each other.

[Romas]

I've understood, that Louigi Verona wants to start the app from different process, but with particular hot key. Did I understand correctly?

[Auria]

See wiki article about catching key events globally; then just do what doublemax said (even though i'm not sure relying to arg[0] is a good idea)

[mikeandtherest]

I think Auria is right. As far as I know, argv[0] only stores the name of the executable file. So if the current directory of your application is changed during the execution, then you won't be able to execute your application again because you won't have the correct path. This means: don't rely on the argv[0], put the full path instead.

Cheers,
Mihai Paraschivescu

[doublemax]

at least on Windows argv[0] always contains the whole path. If in doubt, there's always wxStandardPaths::GetExecutablePath

[Louigi Verona]

Okay, thanks guys, I will try it.

My programm already can catch key events globally, so there shouldn't be much problem!

[Louigi Verona]

When used the code you wrote, got an error: wxGetApp undeclared.

However, I tried this and it worked:

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::wxExecute(wxTheApp->argv[0]);

thanks for the help, doublemax!