Command line arguments in wxWidgets

Question

Is there a way I can read the command line arguments passed into a C++ wxWidgets application? If so, could you please provide an example of how to do so.

Your `main` function has two arguments, normally called `argc` and `argv`. Those are the command line arguments passed to your application, and which you pass on to wxWidgets. Just check those arguments to `main` yourself if you need to. — Some programmer dude, Apr 12 '12 at 06:22
@JoachimPileborg: I am not sure if you are familiar with how wxWidgets programs initialized, however, they typically use wxFrame and wxApplication windows and you don't plainly have access to those two variables. — jack, Apr 12 '12 at 06:28
If there's no methods in the application class to get the parameters, maybe you have to re-implement the `IMPLEMENT_APP` macro, to get the arguments from there. — Some programmer dude, Apr 12 '12 at 06:31

score 7 · Answer 1 · answered Apr 12 '12 at 20:15

In plain C++, there is argc and argv. When you are building a wxWidgets application, you can access these using wxApp::argc, wxApp::argv[] or wxAppConsole::argc, wxAppConsole::argv[]. Note that wxApp is derived from wxAppConsole, so either works depending on if you have a console app or GUI app. See wxAppConsole

IMPLEMENT_APP(MyApp)

bool MyApp::OnInit() {
// Access command line arguments with wxApp::argc, wxApp::argv[0], etc.
// ...
}

You may also be interested in wxCmdLineParser.

Thank you JohnPS, its exactly what i need. – Saif Jun 06 '18 at 16:22 — Saif, Jun 06 '18 at 16:22

score 1 · Accepted Answer · edited Oct 11 '14 at 05:30

Have a look at these examples (1, 2) or:

int main(int argc, char **argv) 
{ 
    wxApp::CheckBuildOptions(WX_BUILD_OPTIONS_SIGNATURE, "program"); 

    wxInitializer initializer; 
    if (!initializer) 
    { 
        fprintf(stderr, "Failed to initialize the wxWidgets library, aborting."); 
        return -1; 
    } 

    static const wxCmdLineEntryDesc cmdLineDesc[] = 
    { 
        { wxCMD_LINE_SWITCH, "h", "help", "show this help message", 
            wxCMD_LINE_VAL_NONE, wxCMD_LINE_OPTION_HELP }, 
        // ... your other command line options here... 

        { wxCMD_LINE_NONE } 
    }; 

    wxCmdLineParser parser(cmdLineDesc, argc, wxArgv); 
    switch ( parser.Parse() ) 
    { 
        case -1: 
            wxLogMessage(_T("Help was given, terminating.")); 
            break; 

        case 0: 
            // everything is ok; proceed 
            break; 

        default: 
            wxLogMessage(_T("Syntax error detected, aborting.")); 
            break; 
    } 
    return 0; 
}

score 1 · Answer 3 · answered Apr 12 '12 at 07:49

1

You can access the command line variables from your wxApp as it inherites from wxAppConsole which provides wxAppConsole::argc and wxAppConsole::argv.

answered Apr 12 '12 at 07:49

SteveL

1,811
1
13
23

Command line arguments in wxWidgets

3 Answers3

Linked