From 336bd01f16b978dfe377524867b4a44f6240acff Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Wed, 16 Aug 2023 12:35:50 +0200
Subject: X11 platform: give number keys layout-independent keysym's

Without this, the sudoku app is unusable with a French keyboard
---
 src/Fl_x.cxx | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Fl_x.cxx b/src/Fl_x.cxx
index f679375d5..1dffa6e1c 100644
--- a/src/Fl_x.cxx
+++ b/src/Fl_x.cxx
@@ -1870,6 +1870,15 @@ int fl_handle(const XEvent& thisevent)
         keysym = FL_Favorites;
         break;
     }
+
+    // Special processing for number keys == keycodes 10-19
+    // necessary to support keyboard layouts with digits in uppercase :
+    if (keycode >= 10 && keycode <= 18) {
+      keysym = '1' + (keycode - 10);
+    } else if (keycode == 19) {
+      keysym = '0';
+    }
+
     // We have to get rid of the XK_KP_function keys, because they are
     // not produced on Windoze and thus case statements tend not to check
     // for them.  There are 15 of these in the range 0xff91 ... 0xff9f
-- 
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