Added basic debug log window

CMakeLists.txt

@@ -36,6 +36,7 @@ set(LUNARIUM_SRC
 "src/input/keyboard.cpp"
 "src/input/inputManager.cpp"
 "src/graphics/gui/gui.cpp"
+"src/graphics/gui/logGui.cpp"
 )
 
 # add the executable

docs/Tasks.todo

@@ -13,8 +13,11 @@ Core:
         ✔ Implement the Image creation methods @done (9/9/2021, 2:50:20 PM)
 
         
-        Dear ImGui:
+        GUI:
-            ☐ Dear ImGui class with basic initialization
+            ✔ Dear ImGui class with basic initialization @done (9/10/2021, 1:42:19 PM)
+            ✔ Debug log window @done (9/10/2021, 4:44:48 PM)
+            ☐ Add key to show debug log window
+.
 
     Input:
         ✔ Port over the Element2D input system and adjust it to use glfw @done (9/8/2021, 8:20:07 PM)

src/core/core.cpp

@@ -13,6 +13,7 @@
 #include <window/window.h>
 #include <graphics/opengl/glGraphics.h>
 #include <graphics/gui/gui.h>
+#include <graphics/gui/logGui.h>
 
 namespace lunarium
 {
@@ -42,6 +43,7 @@ namespace lunarium
         Logger::Log(LogCategory::CORE, LogLevel::INFO, "Lunarium is shutting down!");
 
         // Shutdown subsystems
+        LogGui::FreeInstance();
         GUI::GetInstance().Shutdown();
         GUI::FreeInstance();
 
@@ -83,6 +85,15 @@ namespace lunarium
 		if (mErrorLogFile.is_open())
 			Logger::GetInstance()->AddListener(new FileListener(mErrorLogFile, LogLevel::ERROR | LogLevel::FATAL_ERROR));
         
+        // Init the Debug log window
+        OpRes result;
+        result = LogGui::GetInstance().Initialize();
+        if (Failed(result))
+        {
+            Logger::Log(LogCategory::CORE, LogLevel::WARNING,
+                    "Could not initialized the debug log window: %s", result.Description);
+        }
+        
         Logger::Log(LogCategory::CORE, LogLevel::INFO, "Running Lunarium version %s", Version::GetVersion().ToString().c_str());
 
         // Attempt to load the engine state file. This file should be placed in the same directory as the lunarium program.
@@ -100,8 +111,6 @@ namespace lunarium
         std::vector<Args::SwitchDesc> sd;
         mpArgs = new Args(argc, argv, '-', sd);
 
-        OpRes result;
-
         // Init Graphics/Window system
         mpWindow = new Window;
         result = mpWindow->Initialize(mState);
@@ -151,6 +160,12 @@ namespace lunarium
 
         // GUI
         mGUI.Initialize(mpWindow);
+        result = LogGui::GetInstance().Initialize();
+        if (Failed(result))
+        {
+            Logger::Log(LogCategory::CORE, LogLevel::WARNING,
+                    "Could not initialized the debug log window: %s", result.Description);
+        }
 
         mbIsInit = true;
     }
@@ -208,13 +223,15 @@ namespace lunarium
             mpGraphics->BeginDraw();
 
             // DEBUG: Render test ImGUI window
-            mGUI.ShowDemoWindow();
+            // mGUI.ShowDemoWindow();
+            LogGui::GetInstance().Show();
 
             // DEBUG: Graphics tests
             mpGraphics->DrawFilledEllipse(glm::vec2(600, 300), glm::vec2(100, 150), Color(1.0f, 0.0f, 1.0f, 1.0f), 100);
             mpGraphics->DrawString("This is a test of the text renderer!", Rectangle(100, 200, width, 300), 
                                     Color(0.0f, 1.0f, 1.0f, 1.0f), 0.5f, mpGraphics->DefaultFont());
 
+            mGUI.EndFrame();
             mpGraphics->EndDraw();
         }
     }

src/graphics/gui/gui.cpp

@@ -98,22 +98,25 @@ namespace lunarium
         ImGui::NewFrame();
     }
 
-    void GUI::ShowDemoWindow()
+    void GUI::EndFrame()
     {
-        if (!mbIsInit)
-            return;
-
-            
-        ImGui::ShowDemoWindow(&mbShowDemo);       
         ImGui::Render();
         ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
 
         if (ImGui::GetIO().ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
         {
-            //GLFWwindow* backup_current_context = glfwGetCurrentContext();
+            GLFWwindow* backup_current_context = glfwGetCurrentContext();
             ImGui::UpdatePlatformWindows();
             ImGui::RenderPlatformWindowsDefault();
-            //glfwMakeContextCurrent(backup_current_context);
+            glfwMakeContextCurrent(backup_current_context);
+        }
     }
+
+    void GUI::ShowDemoWindow()
+    {
+        if (!mbIsInit)
+            return;
+            
+        ImGui::ShowDemoWindow(&mbShowDemo);       
     }
 }

src/graphics/gui/gui.h

@@ -23,6 +23,7 @@ namespace lunarium
         void Shutdown();
 
         void NewFrame();
+        void EndFrame();
         void ShowDemoWindow();
 
     private:

src/graphics/gui/logGui.cpp

@@ -0,0 +1,116 @@
+/******************************************************************************
+*	File		-	logGui.cpp
+*	Author		-	Joey Pollack
+*	Date		-	2021/09/09 (y/m/d)
+*	Mod Date	-	2021/09/10 (y/m/d)
+*	Description	-	A debug log window
+******************************************************************************/
+
+#include "logGui.h"
+#include <imgui.h>
+#include <imgui_impl_glfw.h>
+#include <imgui_impl_opengl3.h>
+#include <sstream>
+
+namespace lunarium
+{
+    ////////////////////////////////////////////////////////////
+    //				GUI LOG LISTENER
+    ////////////////////////////////////////////////////////////
+    GuiListener::GuiListener(LogGui* pGui, uint32_t acceptedLogLevels, uint32_t acceptedLogCategories, const char* myName)
+        : LogListener(acceptedLogLevels, acceptedLogCategories, myName), mpGui(pGui)
+    {
+
+    }
+
+	bool GuiListener::Log(LogMessage& message)
+    {
+        if (!LevelIsSet(message.LogLevel) ||
+			!CategoryIsSet(message.LogCategory))
+			return false;
+
+        std::ostringstream oss;
+
+		oss << std::endl << Logger::TimeStamp() << Logger::GetCategoryName(message.LogCategory)
+					<< Logger::GetLevelName(message.LogLevel) << message.Message << std::flush;
+        
+        mpGui->mMsgHistory.push_back(oss.str());
+		return true;
+    }
+
+    ////////////////////////////////////////////////////////////
+    //				GUI LOGGER
+    ////////////////////////////////////////////////////////////
+    LogGui* LogGui::mpInstance = nullptr;
+    LogGui::LogGui()
+        : mbShow(true), mListener(this)
+    {
+
+    }
+
+    LogGui& LogGui::GetInstance()
+    {
+        if (!mpInstance)
+        {
+            mpInstance = new LogGui;
+        }
+
+        return *mpInstance;
+    }
+
+    void LogGui::FreeInstance()
+    {
+        Logger::GetInstance()->RemoveListener(&mpInstance->mListener);
+
+        delete mpInstance;
+        mpInstance = nullptr;
+    }
+    
+    OpRes LogGui::Initialize()
+    {
+        Logger::GetInstance()->AddListener(&mListener);
+        return OpRes::OK();
+    }
+    
+    void LogGui::Show()
+    {
+        if (!mbShow)
+            return;
+
+        ImGui::SetNextWindowSize(ImVec2(500, 400), ImGuiCond_FirstUseEver);
+        if (!ImGui::Begin("Debug Log", &mbShow))
+        {
+            ImGui::End();
+            return;
+        }
+
+        ImGui::BeginChild("scrolling", ImVec2(0, 0), false, ImGuiWindowFlags_HorizontalScrollbar);
+        for (int i = 0; i < mMsgHistory.size(); i++)
+        {
+            const char* msg = mMsgHistory[i].c_str();
+            int len = strlen(msg);
+            ImGui::TextUnformatted(msg);
+        }
+
+        if (ImGui::GetScrollY() >= ImGui::GetScrollMaxY())
+            ImGui::SetScrollHereY(1.0f);
+
+        ImGui::EndChild();
+        ImGui::End();
+    }
+    
+    void LogGui::Clear()
+    {
+        mMsgHistory.clear();
+    }
+    
+    void LogGui::SetShow(bool show)
+    {
+        mbShow = show;
+    }
+    
+    bool LogGui::IsShown() const
+    {
+        return mbShow;
+    }
+}

src/graphics/gui/logGui.h

@@ -0,0 +1,57 @@
+/******************************************************************************
+*	File		-	logGui.h
+*	Author		-	Joey Pollack
+*	Date		-	2021/09/09 (y/m/d)
+*	Mod Date	-	2021/09/10 (y/m/d)
+*	Description	-	A debug log window
+******************************************************************************/
+
+#ifndef LOG_GUI_H_
+#define LOG_GUI_H_
+
+#include <utils/opRes.h>
+#include <vector>
+#include <string>
+#include <utils/logger.h>
+
+namespace lunarium
+{
+    class LogGui;
+    class GuiListener : public LogListener
+    {
+    public:
+        GuiListener(LogGui* pGui, uint32_t acceptedLogLevels = LogLevel::ANY, uint32_t acceptedLogCategories = LogLevel::ANY, const char* myName = "Gui Listener");
+		virtual bool Log(LogMessage& message);
+
+    private:
+        LogGui* mpGui;
+    };
+
+    class LogGui
+    {
+    public:
+        static LogGui& GetInstance();
+        static void FreeInstance();
+
+        OpRes Initialize();
+        void Show();
+        void Clear();
+
+        void SetShow(bool show);
+        bool IsShown() const;
+
+    private:
+        static LogGui* mpInstance;
+        bool mbShow;
+        std::vector<std::string> mMsgHistory;
+        friend GuiListener;
+        GuiListener mListener;
+
+    private:
+        LogGui();
+        LogGui(const LogGui&) = delete;
+        const LogGui& operator=(const LogGui&) = delete;
+    };
+}
+
+#endif // LOG_GUI_H_