Hello, I am not sure if this is a bug or not in the wxwidgets driver?:

After running plbox(), it is neccesary to run plcol0() afterwards. If not, the 
following plline() is invisible. This is not neccesary when using the xwin 
driver. Here is some example c++-code:

//////////////////////////////////////////
#include <plplot/plplot.h>

using namespace std;

int main() {
        double x[] = { 0.1, 0.5, 0.2, 0.4, 0.4 };
        double y[] = { 0.5, 0.4, 0.4, 0.8, 0.9 };

        plsdev("wxwidgets");
        plinit();
        plenv(0, 1, 0, 1, 1, -2);
        
        plbox("bcinst", 0, 0, "bcinst", 0, 0);
        
        plcol0(1); // Without this the lines are invisible!
        plline(5, x, y);
        
        plend();

        return(0);
}
////////////////////////////////////////////

Debian Sid (PLPlot 5.8.0-6 and NVidia driver 100.14.19)

Best regards,
Torquil Sørensen

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