Base work on reimplementing editor GUI

include/Engine/Editor/EditorGUI.h

@@ -0,0 +1,65 @@
+#ifndef EditorGUI_h__
+#define EditorGUI_h__
+
+#include <imgui/imgui.h>
+#define IMGUI_DEFINE_MATH_OPERATORS
+#include <imgui/imgui_internal.h>
+#include <nativefiledialog/nfd.h>
+#include <boost/filesystem.hpp>
+#include "../Common.h"
+
+#include "../Core/EventBroker.h"
+#include "../Core/World.h"
+#include "../Core/EntityWrapper.h"
+
+class EditorGUI
+{
+public:
+    EditorGUI(EventBroker* eventBroker)
+        : m_EventBroker(eventBroker)
+    { }
+
+    void Draw(World* world);
+
+    void SelectEntity(EntityWrapper entity);
+
+    // Called when an entity is selected in the entity tree
+    typedef std::function<void(EntityWrapper)> OnEntitySelectedCallback_t;
+    void SetEntitySelectedCallback(OnEntitySelectedCallback_t f) { m_OnEntitySelected = f; }
+    // Called when the user means to import an entity file. 
+    // Expects an EntityWrapper of the newly created entity in return.
+    typedef std::function<EntityWrapper(boost::filesystem::path)> OnEntityImport_t;
+    void SetEntityImportCallback(OnEntityImport_t f) { m_OnEntityImport = f; }
+    // Called when the user means to save an entity to file.
+    // Expects a bool indicating whether the save was successful or not in return.
+    typedef std::function<bool(EntityWrapper, boost::filesystem::path)> OnEntitySave_t;
+    void SetEntitySaveCallback(OnEntitySave_t f) { m_OnEntitySave = f; }
+    // Called when the user means to create a new entity.
+    // @param EntityWrapper The parent of the entity to be created
+    // @return EntityWrapper The newly created entity
+    typedef std::function<EntityWrapper(EntityWrapper)> OnEntityCreate_t;
+    void SetEntityCreateCallback(OnEntityCreate_t f) { m_OnEntityCreate = f; }
+    // Called when the user means to delete an entity.
+    typedef std::function<void(EntityWrapper)> OnEntityDelete_t;
+    void SetEntityCreateCallback(OnEntityDelete_t f) { m_OnEntityDelete = f; }
+
+private:
+    EventBroker* m_EventBroker;
+
+    // State variables
+    EntityWrapper m_CurrentSelection = EntityWrapper::Invalid;
+
+    // Callbacks
+    OnEntitySelectedCallback_t m_OnEntitySelected = nullptr;
+    OnEntityImport_t m_OnEntityImport = nullptr;
+    OnEntitySave_t m_OnEntitySave = nullptr;
+    OnEntityCreate_t m_OnEntityCreate = nullptr;
+    OnEntityDelete_t m_OnEntityDelete = nullptr;
+    
+    void drawMenu();
+    void drawEntities(World* world);
+    void drawEntitiesRecursive(World* world, EntityID parent);
+    bool drawEntityNode(EntityWrapper entity);
+};
+
+#endif

include/Engine/Editor/EditorSystem.h

@@ -8,6 +8,7 @@
 #include "../Core/ResourceManager.h"
 #include "../Core/EntityFilePreprocessor.h"
 #include "../Core/EntityFileParser.h"
+#include "EditorGUI.h"
 
 class EditorSystem : public ImpureSystem
 {
@@ -23,8 +24,10 @@ private:
     World* m_EditorWorld;
     SystemPipeline* m_EditorWorldSystemPipeline;
     Camera* m_EditorCamera;
-
     EntityWrapper m_Widget = EntityWrapper::Invalid;
     EntityWrapper m_Camera = EntityWrapper::Invalid;
     DebugCameraInputController<EditorSystem>* m_DebugCameraInputController;
+    EditorGUI* m_EditorGUI;
+
+    void OnEntitySelected(EntityWrapper entity);
 };

include/Engine/Editor/EditorUI.h

@@ -1,8 +0,0 @@
-#include <imgui/imgui.h>
-#include <nativefiledialog/nfd.h>
-
-class EditorUI
-{
-public:
-    EditorUI();
-};