1 files changed, 61 insertions, 0 deletions
diff --git a/src/drivers/Unix/Fl_Unix_Screen_Driver.H b/src/drivers/Unix/Fl_Unix_Screen_Driver.H
new file mode 100644
index 000000000..ebd0ed706
--- /dev/null
+++ b/src/drivers/Unix/Fl_Unix_Screen_Driver.H
@@ -0,0 +1,61 @@
+//
+// Definition of the part of the screen driver shared by X11 and Wayland platforms
+// for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 2021-2022 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     https://www.fltk.org/COPYING.php
+//
+// Please see the following page on how to report bugs and issues:
+//
+//     https://www.fltk.org/bugs.php
+//
+
+#ifndef FL_UNIX_SCREEN_DRIVER_H
+#define FL_UNIX_SCREEN_DRIVER_H
+
+#include "../../Fl_Screen_Driver.H"
+
+#  if USE_POLL
+
+#    include <poll.h>
+static pollfd *pollfds = 0;
+
+#  else
+#    if HAVE_SYS_SELECT_H
+#      include <sys/select.h>
+#    endif /* HAVE_SYS_SELECT_H */
+
+// The following #define is only needed for HP-UX 9.x and earlier:
+//#define select(a,b,c,d,e) select((a),(int *)(b),(int *)(c),(int *)(d),(e))
+
+#    define POLLIN 1
+#    define POLLOUT 4
+#    define POLLERR 8
+
+#  endif /* USE_POLL */
+
+
+class Fl_Unix_Screen_Driver : public Fl_Screen_Driver {
+public:
+  static fd_set fdsets[3];
+  static int maxfd;
+  static int nfds;
+  static struct FD {
+  #  if !USE_POLL
+    int fd;
+    short events;
+  #  endif
+    void (*cb)(int, void*);
+    void* arg;
+  } *fd;
+  virtual int poll_or_select_with_delay(double time_to_wait);
+  virtual int poll_or_select();
+  virtual void *control_maximize_button(void *) { return NULL; }
+};
+
+#endif /* FL_UNIX_SCREEN_DRIVER_H */