Add flag selection to flag decals

• Add flag selection code blatantly stolen from WBDecals
• Fix attachment of symmetrically attached decals

Source/ConformalDecals/ModuleConformalDecal.cs

@@ -324,7 +324,7 @@ namespace ConformalDecals {
         }
 
         protected void OnEditorEvent(ConstructionEventType eventType, Part eventPart) {
-            if (eventPart != this.part) return;
+            if (this.part != eventPart && !part.symmetryCounterparts.Contains(eventPart)) return;
             switch (eventType) {
                 case ConstructionEventType.PartAttached:
                     OnAttach();

Source/ConformalDecals/ModuleConformalFlag.cs

@@ -1,45 +1,109 @@
 using ConformalDecals.Util;
+using UnityEngine;
 
 namespace ConformalDecals {
     public class ModuleConformalFlag : ModuleConformalDecal {
         private const string DefaultFlag = "Squad/Flags/default";
 
+        [KSPField(isPersistant = true)] public string flagUrl = DefaultFlag;
+
+        [KSPField(isPersistant = true)] public bool useCustomFlag;
+
+        public string MissionFlagUrl {
+            get {
+                if (HighLogic.LoadedSceneIsEditor) {
+                    return string.IsNullOrEmpty(EditorLogic.FlagURL) ? HighLogic.CurrentGame.flagURL : EditorLogic.FlagURL;
+                }
+
+                if (HighLogic.LoadedSceneIsFlight) {
+                    return string.IsNullOrEmpty(part.flagURL) ? HighLogic.CurrentGame.flagURL : part.flagURL;
+                }
+
+                return DefaultFlag;
+            }
+        }
+
         public override void OnLoad(ConfigNode node) {
             base.OnLoad(node);
 
-            UpdateFlag(GetDefaultFlag());
+            if (useCustomFlag) {
+                SetFlag(flagUrl);
+            }
+            else {
+                SetFlag(MissionFlagUrl);
+            }
         }
 
         public override void OnStart(StartState state) {
             base.OnStart(state);
 
             if (HighLogic.LoadedSceneIsGame) {
-                GameEvents.onMissionFlagSelect.Add(UpdateFlag);
+                GameEvents.onMissionFlagSelect.Add(OnEditorFlagSelected);
+            }
+
+            if (HighLogic.LoadedSceneIsEditor) {
+                Events[nameof(ResetFlag)].guiActiveEditor = useCustomFlag;
             }
 
-            UpdateFlag(GetDefaultFlag());
+            if (useCustomFlag) {
+                SetFlag(flagUrl);
+            }
+            else {
+                SetFlag(MissionFlagUrl);
+            }
         }
 
         public override void OnDestroy() {
-            GameEvents.onMissionFlagSelect.Remove(UpdateFlag);
+            GameEvents.onMissionFlagSelect.Remove(SetFlag);
             base.OnDestroy();
         }
 
-        private string GetDefaultFlag() {
-            if (HighLogic.LoadedSceneIsGame) {
-                return EditorLogic.FlagURL != string.Empty ? EditorLogic.FlagURL : HighLogic.CurrentGame.flagURL;
-            }
-            else {
-                return DefaultFlag;
+        [KSPEvent(guiActive = false, guiActiveEditor = true, guiName = "Select Flag")]
+        public void SelectFlag() {
+            var flagBrowser = (Instantiate((Object) (new FlagBrowserGUIButton(null, null, null, null)).FlagBrowserPrefab) as GameObject).GetComponent<FlagBrowser>();
+            flagBrowser.OnFlagSelected = OnCustomFlagSelected;
+        }
+
+        [KSPEvent(guiActive = false, guiActiveEditor = true, guiName = "Reset Flag")]
+        public void ResetFlag() {
+            SetFlag(MissionFlagUrl);
+            SetFlagSymmetryCounterparts(MissionFlagUrl);
+
+            useCustomFlag = false;
+            Events[nameof(ResetFlag)].guiActiveEditor = false;
+        }
+
+        private void OnCustomFlagSelected(FlagBrowser.FlagEntry newFlagEntry) {
+            SetFlag(newFlagEntry.textureInfo.name);
+            SetFlagSymmetryCounterparts(newFlagEntry.textureInfo.name);
+
+            useCustomFlag = true;
+            Events[nameof(ResetFlag)].guiActiveEditor = true;
+        }
+
+        private void OnEditorFlagSelected(string newFlagUrl) {
+            if (useCustomFlag) {
+                SetFlag(newFlagUrl);
+                SetFlagSymmetryCounterparts(newFlagUrl);
             }
         }
 
-        private void UpdateFlag(string flagUrl) {
-            this.Log($"Loading flag texture '{flagUrl}'.");
+        private void SetFlag(string newFlagUrl) {
+            this.Log($"Loading flag texture '{newFlagUrl}'.");
 
-            materialProperties.AddOrGetTextureProperty("_Decal", true).TextureUrl = flagUrl;
+            flagUrl = newFlagUrl;
+            materialProperties.AddOrGetTextureProperty("_Decal", true).TextureUrl = newFlagUrl;
 
             UpdateMaterials();
         }
+
+        private void SetFlagSymmetryCounterparts(string newFlagUrl) {
+            foreach (var counterpart in part.symmetryCounterparts) {
+                var decal = counterpart.GetComponent<ModuleConformalFlag>();
+
+                decal.SetFlag(newFlagUrl);
+                decal.useCustomFlag = useCustomFlag;
+            }
+        }
     }
 }