Allow configuration of XBE-24 keyboard layout

PamhagenSysCtrl/Helpers/Config.cs

@@ -12,8 +12,11 @@ namespace PamhagenSysCtrl.Helpers {
         public string? UpdateUrl;
         public bool UpdateAuto;
 
+        public PamhagenPlant.ShortcutKey?[] Xbe24KeyMap;
+
         public Config(string filename) {
             FileName = filename;
+            Xbe24KeyMap = new PamhagenPlant.ShortcutKey?[24];
             Read();
         }
 
@@ -23,10 +26,26 @@ namespace PamhagenSysCtrl.Helpers {
                 PlcPort = config["plc:port"] ?? "COM1";
                 UpdateUrl = config["update:url"];
                 UpdateAuto = TrueValues.Contains(config["update:auto"]?.ToLower());
+                var xbe24 = config.GetSection("xbe24");
+                for (char c = 'a'; c <= 'd'; c++) {
+                    for (int r = 1; r <= 6; r++) {
+                        int n = (c - 'a') * 6 + r - 1;
+                        var s = xbe24[$"{c}{r}"]?.ToUpper();
+                        Xbe24KeyMap[n] = s == null ? null : Enum.Parse<PamhagenPlant.ShortcutKey>(s);
+                    }
+                }
             } catch (Exception exc) {
                 MessageBox.Show($"Die Konfigurationsdatei konnte nicht gelesen werden:\n\n{exc.Message}", "Konfigurationsdatei lesen", MessageBoxButton.OK, MessageBoxImage.Error);
                 Application.Current.Shutdown();
             }
         }
+
+        public PamhagenPlant.ShortcutKey? MapKey(int n) {
+            return n < 0 || Xbe24KeyMap.Length < n ? null : Xbe24KeyMap[n];
+        }
+
+        public int? MapKey(PamhagenPlant.ShortcutKey key) {
+            return Xbe24KeyMap.IndexOf(key) is int n ? n == -1 ? null : n : null;
+        }
     }
 }