C2LC-433: Add keyboard shortcut for pen down toggle

docs/keyboard.md

@@ -33,6 +33,7 @@ follows.
 | Ctrl + Alt + p | playPauseProgram |
 | Ctrl + Alt + r | refreshScene |
 | Ctrl + Alt + s | stopProgram |
+| Ctrl + Alt + n | penDownToggle |
 | < | decreaseProgramSpeed |
 | > | increaseProgramSpeed |
 | ? | showHide |
@@ -82,6 +83,7 @@ with the starting key of a sequence.  Those key bindings are as follows:
 | Alt + p | playPauseProgram |
 | Alt + r | refreshScene |
 | Alt + s | stopProgram |
+| Alt + n | penDownToggle |
 | < | decreaseProgramSpeed |
 | > | increaseProgramSpeed |
 | ? | showHide |

src/App.js

@@ -819,6 +819,10 @@ export class App extends React.Component<AppProps, AppState> {
                                 this.handleChangeCharacterPosition('turnRight');
                             }
                             break;
+                        case("penDownToggle"):
+                            const currentPendownState = this.state.drawingEnabled;
+                            this.handleTogglePenDown(!currentPendownState);
+                            break;
                         default:
                             break;
                     }

src/KeyboardInputSchemes.js

@@ -19,6 +19,7 @@ export type ActionName =
     | "announceScene"
     | "decreaseProgramSpeed"
     | "increaseProgramSpeed"
+    | "penDownToggle"
     | "playPauseProgram"
     | "refreshScene"
     | "showHide"
@@ -281,6 +282,10 @@ const VoiceOverInputScheme: KeyboardInputScheme = Object.assign({
     stopProgram: {
         keyDef: { code: "KeyS", key: "s", altKey: true},
         actionName: "stopProgram"
+    },
+    penDownToggle: {
+        keyDef: { code: "KeyN", key: "n", altKey: true},
+        actionName: "penDownToggle"
     }
 }, ExtendedKeyboardSequences);
 
@@ -343,6 +348,10 @@ const NvdaInputScheme = Object.assign({
         keyDef: {code: "KeyS", key: "s", altKey: true, ctrlKey: true},
         actionName: "stopProgram"
     },
+    penDownToggle: {
+        keyDef: { code: "KeyN", key: "n", altKey: true, ctrlKey: true},
+        actionName: "penDownToggle"
+    }
 }, NvdaExtendedKeyboardSequences);
 
 export const KeyboardInputSchemes:KeyboardInputSchemesType = {