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[fltk.general] FLTK 1.3.4 - Setting Window icon in Linux
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FLTK 1.3.4 - Setting Window icon in Linux Will B May 17, 2021  
  Greetings!

Following the instructions here https://www.fltk.org/doc-1.3/osissues.html , I tried to set my main window icon with the following code

    #include <X11/xpm.h>
    fl_open_display();                // needed if display has not been previously opened

    Pixmap pm;
    Pixmap mask;
    XpmCreatePixmapFromData(fl_display, DefaultRootWindow(fl_display), pmSpiritvnc_xpm, &pm, &mask, NULL);

    app->mainWin->icon(reinterpret_cast<void *>(pm));

Unfortunately this gives a compile error:

In file included from /usr/include/X11/Xlib.h:47,
                 from /usr/include/FL/x.H:37,
                 from /usr/include/FL/fl_draw.H:27,
                 from src/app.h:43,
                 from src/spiritvnc.cxx:47:
/usr/include/X11/xpm.h: In function ‘int main(int, char**)’:
/usr/include/X11/xpm.h:286:1: error: expected unqualified-id before string constant
 _XFUNCPROTOBEGIN
 ^~~~~~~~~~~~~~~~
src/spiritvnc.cxx:94:5: error: ‘XpmCreatePixmapFromData’ was not declared in this scope
     XpmCreatePixmapFromData(fl_display, DefaultRootWindow(fl_display), pmSpiritvnc_xpm, &pm, &mask, NULL);
     ^~~~~~~~~~~~~~~~~~~~~~~
src/spiritvnc.cxx:94:5: note: suggested alternative: ‘XCreatePixmapFromData’
     XpmCreatePixmapFromData(fl_display, DefaultRootWindow(fl_display), pmSpiritvnc_xpm, &pm, &mask, NULL);
     ^~~~~~~~~~~~~~~~~~~~~~~
     XCreatePixmapFromData

I am using antiX Linux 19.3, which is based on Debian. All the dev packages are installed and as noted on that OS Issues page, I am calling Fl_Window::show(int argc, char** argv). I also tried the XCreatePixmapFromData method, but it produces the same or similar error message. I have grepped for XpmCreatePixmapFromData in /usr/include and it does show up in X11/xpm.h.

I'm not a big Xlib user -- is there something else I should try?

PS: Google groups is very clunky for code entry and other programming-related text-editing...have you thought about using something else?

Thank you! :-)

Will Brokenbourgh

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