feat(a380x/fcu): add TRUE indication on FCU when TRUE/MAG pb is pushed

.github/CHANGELOG.md

@@ -98,6 +98,7 @@
 1. [ELEC] Improved elec system startup behaviour - @Gurgel100 (Pascal) - @saschl
 1. [A380X] Improve pilot and copilot camera positions - @heclak (Heclak)
 1. [A380X/EFIS] Illuminate ND range and mode selectors during light test - @BravoMike99 (bruno_pt99)
+1. [A380X/FCU]  Add TRUE indication on FCU when TRUE North reference is selected on AFS CP - @heclak (Heclak)
 
 ## 0.12.0
 

fbw-a380x/src/systems/instruments/src/FCU/Components/FcuDisplay.tsx

@@ -22,7 +22,7 @@ export class FcuDisplay extends DisplayComponent<FcuDisplayProps> {
           <div id="Electricity" state={this.props.isHidden.map((v) => (v ? 'off' : 'on'))}>
             <div id="LargeScreen">
               <Speed />
-              <Heading />
+              <Heading bus={this.props.bus} />
 
               <div id="AltVS">
                 <Altitude bus={this.props.bus} />

fbw-a380x/src/systems/instruments/src/FCU/Components/Heading.tsx

@@ -1,16 +1,58 @@
 //  Copyright (c) 2023-2024 FlyByWire Simulations
 //  SPDX-License-Identifier: GPL-3.0
 
-import { DisplayComponent, FSComponent, VNode } from '@microsoft/msfs-sdk';
+import {
+  ConsumerSubject,
+  DisplayComponent,
+  EventBus,
+  FSComponent,
+  MappedSubject,
+  SubscribableMapFunctions,
+  VNode,
+} from '@microsoft/msfs-sdk';
+import { FcuEvents } from 'instruments/src/FCU/Publishers/FcuPublisher';
+import { OverheadEvents } from 'instruments/src/MsfsAvionicsCommon/providers/OverheadPublisher';
 
-export interface HeadingProps {}
+export interface HeadingProps {
+  readonly bus: EventBus;
+}
 
 export class Heading extends DisplayComponent<HeadingProps> {
+  private readonly sub = this.props.bus.getSubscriber<FcuEvents & OverheadEvents>();
+
+  private readonly isLightTestActive = ConsumerSubject.create(this.sub.on('ovhd_ann_lt_test_active'), false);
+  private readonly trueRefActive = ConsumerSubject.create(this.sub.on('fcu_push_true_ref'), false);
+
+  private readonly trueIndicatorActive = MappedSubject.create(
+    ([isLightTest, trueRef]) => {
+      if (isLightTest) {
+        return true;
+      } else {
+        return trueRef;
+      }
+    },
+    this.isLightTestActive,
+    this.trueRefActive,
+  );
+
+  onAfterRender(node: VNode): void {
+    super.onAfterRender(node);
+  }
+
   render(): VNode | null {
     return (
       <div id="Heading">
         <svg width="100%" height="100%">
-          <text id="TRUE" class="Common Active " x="23%" y="20%">
+          <text
+            id="TRUE"
+            class={{
+              Common: true,
+              Active: this.trueIndicatorActive,
+              Inactive: this.trueIndicatorActive.map(SubscribableMapFunctions.not()),
+            }}
+            x="23%"
+            y="20%"
+          >
             TRUE
           </text>
           <text id="HDG" class="Common Active" x="48%" y="20%">

fbw-a380x/src/systems/instruments/src/FCU/Managers/HeadingManager.ts

@@ -222,12 +222,10 @@ export class HeadingManager extends TemporaryHax implements Instrument {
       this.isTRKMode = _isTRKMode;
       this.showSelectedHeading = _showSelectedHeading;
       this.currentValue = _value;
-      this.setTextElementActive(this.textTRUE, false);
       this.setTextElementActive(this.textHDG, !this.isTRKMode);
       this.setTextElementActive(this.textTRK, !!this.isTRKMode);
       this.lightsTest = _lightsTest;
       if (this.lightsTest) {
-        this.setTextElementActive(this.textTRUE, true);
         this.setTextElementActive(this.textHDG, true);
         this.setTextElementActive(this.textTRK, true);
         this.setElementVisibility(this.signDegrees, true);

fbw-a380x/src/systems/instruments/src/FCU/Publishers/FcuPublisher.ts

@@ -9,6 +9,7 @@ interface FcuBaseEvents {
   fcu_trk_fpa_active: boolean;
   fcu_left_navaid_mode: NavAidMode;
   fcu_right_navaid_mode: NavAidMode;
+  fcu_push_true_ref: boolean;
 }
 
 type IndexedTopics = 'fcu_left_navaid_mode' | 'fcu_right_navaid_mode';
@@ -36,6 +37,7 @@ export class FcuPublisher extends SimVarPublisher<FcuEvents> {
         'fcu_right_navaid_mode',
         { name: `L:A32NX_EFIS_R_NAVAID_#index#_MODE`, type: SimVarValueType.Enum, indexed: true },
       ],
+      ['fcu_push_true_ref', { name: `L:A32NX_PUSH_TRUE_REF`, type: SimVarValueType.Bool }],
     ]);
 
     super(simvars, bus, pacer);