Merge pull request #157 from SHADE-DP/SP3-6-c-scripting

GameObjects on scripts can now be edited in the inspector and are serialized
Also credit to @srishamharan for fix to SHHierarchyPanel's drag and drop

SHADE_Engine/src/Editor/EditorWindow/HierarchyPanel/SHHierarchyPanel.cpp

@@ -195,18 +195,22 @@ namespace SHADE
     if (SHDragDrop::BeginSource())
     {
       std::string moveLabel = "Moving EID: ";
+      static std::vector<EntityID> draggingEntities = editor->selectedEntities;
       if (!isSelected)
-        editor->selectedEntities.push_back(eid);
-      for (int i = 0; i < static_cast<int>(editor->selectedEntities.size()); ++i)
       {
-        moveLabel.append(std::to_string(editor->selectedEntities[i]));
+        draggingEntities.clear();
-        if (i + 1 < static_cast<int>(editor->selectedEntities.size()))
+        draggingEntities.push_back(eid);
+      }
+      for (int i = 0; i < static_cast<int>(draggingEntities.size()); ++i)
+      {
+        moveLabel.append(std::to_string(draggingEntities[i]));
+        if (i + 1 < static_cast<int>(draggingEntities.size()))
         {
           moveLabel.append(", ");
         }
       }
       ImGui::Text(moveLabel.c_str());
-      SHDragDrop::SetPayload<std::vector<EntityID>>(SHDragDrop::DRAG_EID, &editor->selectedEntities);
+      SHDragDrop::SetPayload<std::vector<EntityID>>(SHDragDrop::DRAG_EID, &draggingEntities);
       SHDragDrop::EndSource();
     }
     else if (SHDragDrop::BeginTarget()) //If Received DragDrop

SHADE_Engine/src/Editor/SHEditorUI.cpp

@@ -16,6 +16,7 @@ of DigiPen Institute of Technology is prohibited.
 // External Dependencies
 #include <imgui.h>
 #include "SHEditorWidgets.hpp"
+#include "ECS_Base/Managers/SHEntityManager.h"
 
 namespace SHADE
 {
@@ -287,6 +288,35 @@ namespace SHADE
     return CHANGED;
   }
 
+  bool SHEditorUI::InputGameObjectField(const std::string& label, uint32_t& value, bool* isHovered)
+  {
+    ImGui::Text(label.c_str());
+    if (isHovered)
+      *isHovered = ImGui::IsItemHovered();
+    ImGui::SameLine();
+    SHEntity* entity = SHEntityManager::GetEntityByID(value);
+    std::ostringstream oss;
+    if (entity)
+    {
+      oss << value << ": " << entity->name;
+    }
+    std::string entityName = oss.str();
+    bool changed = ImGui::InputText("##", &entityName, ImGuiInputTextFlags_ReadOnly);
+    if (SHDragDrop::BeginTarget())
+    {
+      if (const std::vector<EntityID>* payload = SHDragDrop::AcceptPayload<std::vector<EntityID>>(SHDragDrop::DRAG_EID))
+      {
+        if (!payload->empty())
+        {
+          value = payload->at(0);
+          changed = true;
+        }
+        SHDragDrop::EndTarget();
+      }
+    }
+    return changed;
+  }
+
   bool SHEditorUI::InputEnumCombo(const std::string& label, int& v, const std::vector<std::string>& enumNames, bool* isHovered)
   {
     // Clamp input value

SHADE_Engine/src/Editor/SHEditorUI.h

@@ -308,6 +308,14 @@ namespace SHADE
     /// <returns>True if the value was changed.</returns>
     static bool InputTextField(const std::string& label, std::string& value, bool* isHovered = nullptr);
     /// <summary>
+    /// Creates a drag field widget for int input.
+    /// </summary>
+    /// <param name="label">Label used to identify this widget.</param>
+    /// <param name="value">Reference to the variable to store the result.</param>
+    /// <param name="isHovered>If set, stores the hover state of this widget.</param>
+    /// <returns>True if the value was changed.</returns>
+    static bool InputGameObjectField(const std::string& label, uint32_t& value, bool* isHovered = nullptr);
+    /// <summary>
     /// Creates a combo box for enumeration input.
     /// </summary>
     /// <typeparam name="Enum">The type of enum to input.</typeparam>

SHADE_Managed/src/Editor/Editor.cxx

@@ -260,7 +260,7 @@ namespace SHADE
 
             int val = safe_cast<int>(field->GetValue(object));
             int oldVal = val;
-            if (SHEditorUI::InputEnumCombo(Convert::ToNative(field->Name), val, nativeEnumNames))
+            if (SHEditorUI::InputEnumCombo(Convert::ToNative(field->Name), val, nativeEnumNames, &isHovered))
             {
                 field->SetValue(object, val); 
                 registerUndoAction(object, field, val, oldVal);
@@ -280,12 +280,23 @@ namespace SHADE
             // Actual Field
             std::string val = Convert::ToNative(stringVal);
             std::string oldVal = val;
-            if (SHEditorUI::InputTextField(Convert::ToNative(field->Name), val))
+            if (SHEditorUI::InputTextField(Convert::ToNative(field->Name), val, &isHovered))
             {
                 field->SetValue(object, Convert::ToCLI(val));
                 registerUndoAction(object, field, Convert::ToCLI(val), Convert::ToCLI(oldVal));
             }
         }
+        else if (field->FieldType == GameObject::typeid)
+        {
+            GameObject gameObj = safe_cast<GameObject>(field->GetValue(object));
+            uint32_t entityId = gameObj.GetEntity();
+            if (SHEditorUI::InputGameObjectField(Convert::ToNative(field->Name), entityId, &isHovered))
+            {
+                GameObject newVal = GameObject(entityId);
+                field->SetValue(object, newVal);
+                registerUndoAction(object, field, newVal, gameObj);
+            }
+        }
         else
         {
             array<System::Type^>^ interfaces = field->FieldType->GetInterfaces();

SHADE_Managed/src/Serialisation/ReflectionUtilities.cxx

@@ -22,6 +22,7 @@ of DigiPen Institute of Technology is prohibited.
 #include "Math/Vector2.hxx"
 #include "Math/Vector3.hxx"
 #include "Utility/Debug.hxx"
+#include "Engine/GameObject.hxx"
 
 /*-------------------------------------------------------------------------------------*/
 /* Macro Functions                                                                     */
@@ -167,6 +168,11 @@ namespace SHADE
                 fieldNode.push_back(vec.y);
                 fieldNode.push_back(vec.z);
             }
+            else if (fieldInfo->FieldType == GameObject::typeid)
+            {
+                GameObject gameObj = safe_cast<GameObject>(fieldInfo->GetValue(object));
+                fieldNode = gameObj.GetEntity();
+            }
             else // Not any of the supported types
             {
                 Debug::LogWarning(Convert::ToNative(System::String::Format
@@ -242,6 +248,10 @@ namespace SHADE
                 );
             }
         }
+        else if (fieldInfo->FieldType == GameObject::typeid)
+        {
+            fieldInfo->SetValue(object, GameObject(node.as<uint32_t>()));
+        }
         else // Not any of the supported types
         {
             Debug::LogWarning(Convert::ToNative(System::String::Format