gui.cpp

#include "gui.h"

#include <imgui.h>
#include <imgui_impl_glfw.h>
#include <imgui_impl_opengl3.h>

#include "window_manager.h"

namespace sraphy::gui
{
	void Setup()
	{
		IMGUI_CHECKVERSION();
		ImGui::CreateContext();

		ImGuiIO& io = ImGui::GetIO();
		io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
		io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;
		io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;

		io.FontGlobalScale = 1.8f;

		ImGuiStyle& style = ImGui::GetStyle();
		if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
		{
			style.WindowRounding = 0.0f;
			style.Colors[ImGuiCol_WindowBg].w = 1.0f;
		}

		auto* window = WindowManager::GetFocusedWindow();
		ImGui_ImplGlfw_InitForOpenGL(window, true);
		ImGui_ImplOpenGL3_Init("#version 460");

		ImGui::StyleColorsDark();

		auto& colors = ImGui::GetStyle().Colors;
		colors[ImGuiCol_WindowBg] = ImVec4{ 0.1f, 0.105f, 0.11f, 1.0f };

		// Headers
		colors[ImGuiCol_Header] = ImVec4{ 0.2f,  0.205f,  0.21f, 1.0f };
		colors[ImGuiCol_HeaderHovered] = ImVec4{ 0.3f,  0.305f,  0.31f, 1.0f };
		colors[ImGuiCol_HeaderActive] = ImVec4{ 0.15f, 0.1505f, 0.151f, 1.0f };

		// Buttons
		colors[ImGuiCol_Button] = ImVec4{ 0.2f,  0.205f,  0.21f, 1.0f };
		colors[ImGuiCol_ButtonHovered] = ImVec4{ 0.3f,  0.305f,  0.31f, 1.0f };
		colors[ImGuiCol_ButtonActive] = ImVec4{ 0.15f, 0.1505f, 0.151f, 1.0f };

		// Frame BG
		colors[ImGuiCol_FrameBg] = ImVec4{ 0.2f,  0.205f,  0.21f, 1.0f };
		colors[ImGuiCol_FrameBgHovered] = ImVec4{ 0.3f,  0.305f,  0.31f, 1.0f };
		colors[ImGuiCol_FrameBgActive] = ImVec4{ 0.15f, 0.1505f, 0.151f, 1.0f };

		// Tabs
		colors[ImGuiCol_Tab] = ImVec4{ 0.15f, 0.1505f, 0.151f, 1.0f };
		colors[ImGuiCol_TabHovered] = ImVec4{ 0.38f, 0.3805f, 0.381f, 1.0f };
		colors[ImGuiCol_TabActive] = ImVec4{ 0.28f, 0.2805f, 0.281f, 1.0f };
		colors[ImGuiCol_TabUnfocused] = ImVec4{ 0.15f, 0.1505f, 0.151f, 1.0f };
		colors[ImGuiCol_TabUnfocusedActive] = ImVec4{ 0.2f,  0.205f,  0.21f, 1.0f };

		// Title
		colors[ImGuiCol_TitleBg] = ImVec4{ 0.15f, 0.1505f, 0.151f, 1.0f };
		colors[ImGuiCol_TitleBgActive] = ImVec4{ 0.15f, 0.1505f, 0.151f, 1.0f };
		colors[ImGuiCol_TitleBgCollapsed] = ImVec4{ 0.15f, 0.1505f, 0.151f, 1.0f };
	}

	void Shutdown()
	{
		ImGui_ImplOpenGL3_Shutdown();
		ImGui_ImplGlfw_Shutdown();
		ImGui::DestroyContext();
	}

	void Start()
    {
		ImGui_ImplOpenGL3_NewFrame();
		ImGui_ImplGlfw_NewFrame();
		ImGui::NewFrame();
    }
	
	void End()
	{
		ImGuiIO& io = ImGui::GetIO();

		// Rendering
		ImGui::Render();
		ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());

		if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
		{
			auto* backup_current_context = WindowManager::GetFocusedWindow();
			ImGui::UpdatePlatformWindows();
			ImGui::RenderPlatformWindowsDefault();
			glfwMakeContextCurrent(backup_current_context);
		}
	}
} // namespace sraphy::gui