Re: [fltk.general] Caps Lock detection

[Howard Rubin]

On Mon, 08 Apr 2013 20:17:31 -0700, Greg Ercolano <e...@seriss.com> wrote:
>               unsigned n;
>               XkbGetIndicatorState(d, XkbUseCoreKbd, &n);
>               caps_state = (n & 0x01) == 1;

That works perfectly, and even better, needs no timer. Test program below.

Will this be fixed in a future release of FLTK?

- Howard Rubin

======================

#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Output.H>
#include <FL/Fl_Secret_Input.H>
#include <iostream>
#include <X11/XKBlib.h>

bool isCapsLock() {
     Display* d = XOpenDisplay(NULL);
     if (!d)
         return false;
     unsigned n;
     XkbGetIndicatorState(d, XkbUseCoreKbd, &n);
     return (n & 0x01) == 1;
}

class myWindow : public Fl_Window {
public:
     myWindow(int x, int y, const char* l) : Fl_Window(x, y, l), 
pOutput(NULL) {
     }
     Fl_Output* pOutput;

     virtual int handle(int event) {
         static bool haveDoneOnce = false;
         if (!haveDoneOnce || (event== FL_SHORTCUT && Fl::event_key() == 
FL_Caps_Lock)) {
             haveDoneOnce = true;

             if (isCapsLock()) {
                 pOutput->show();
             } else {
                 pOutput->hide();
             }
         }
         return Fl_Window::handle(event);
     }
};

int main(int argc, char* argv[]) {
     myWindow* win = new myWindow(300, 200, "");

     new Fl_Secret_Input(20, 20, 100, 15, "");

     win->pOutput = new Fl_Output(120, 50, 0, 15, "Caps Lock");

     win->end();
     win->show();

     return Fl::run();
}


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