Implement imgui

Author: Kade-github

CMakeLists.txt

@@ -9,7 +9,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED True)
 project ("EncounterMaster" C CXX)
 
 # Add source to this project's executable.
-add_executable (EncounterMaster "EncounterMaster.cpp" )
+add_executable (EncounterMaster "EncounterMaster.cpp" "imgui/imgui.cpp" "imgui/imgui_draw.cpp" "imgui/imgui_demo.cpp" "imgui/imgui_tables.cpp" "imgui/imgui_widgets.cpp" "imgui/backends/imgui_impl_sdlrenderer3.cpp" "imgui/backends/imgui_impl_sdl3.cpp")
 
 # VCPKG configuration (wouldn't work without manually setting it sorry)
 set(CMAKE_TOOLCHAIN_FILE "E:/vcpkg/scripts/buildsystems/vcpkg.cmake")

EncounterMaster.cpp

@@ -2,6 +2,10 @@
 #include <SDL3/SDL_main.h>
 #include <SDL3/SDL.h>
 
+#include "imgui/imgui.h"
+#include "imgui/backends/imgui_impl_sdl3.h"
+#include "imgui/backends/imgui_impl_sdlrenderer3.h"
+
 struct ToolState {
   SDL_Window* window;
   SDL_Renderer* renderer;
@@ -45,18 +49,48 @@ SDL_AppResult SDL_AppInit(void** appstate, int argc, char* argv[]) {
 
   SDL_SetRenderVSync(state->renderer, -1);  // Enable VSync if available
 
+  IMGUI_CHECKVERSION();
+  ImGui::CreateContext();
+  ImGuiIO& io = ImGui::GetIO();
+
+  ImGui::StyleColorsDark();
+
+  ImGui_ImplSDL3_InitForSDLRenderer(state->window, state->renderer);
+  ImGui_ImplSDLRenderer3_Init(state->renderer);
+
   return SDL_APP_CONTINUE;
 }
 
 SDL_AppResult SDL_AppEvent(void* appstate, SDL_Event* event) {
+
+  ImGui_ImplSDL3_ProcessEvent(event);
+
   if (event->type == SDL_EVENT_QUIT) {
     return SDL_APP_SUCCESS;  // Exit the application
   }
   return SDL_APP_CONTINUE;
 }
 
 SDL_AppResult SDL_AppIterate(void* appstate) { 
-    return SDL_APP_CONTINUE;
+  SDL_Renderer* renderer = ((ToolState*)appstate)->renderer;
+  ImGuiIO& io = ImGui::GetIO();
+  static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
+    
+  ImGui_ImplSDLRenderer3_NewFrame();
+  ImGui_ImplSDL3_NewFrame();
+  ImGui::NewFrame();
+
+  ImGui::ShowDemoWindow();
+  ImGui::Render();
+  SDL_SetRenderScale(renderer, io.DisplayFramebufferScale.x,
+                     io.DisplayFramebufferScale.y);
+  SDL_SetRenderDrawColorFloat(renderer, clear_color.x, clear_color.y,
+                              clear_color.z, clear_color.w);
+  SDL_RenderClear(renderer);
+  ImGui_ImplSDLRenderer3_RenderDrawData(ImGui::GetDrawData(), renderer);
+  SDL_RenderPresent(renderer);
+
+  return SDL_APP_CONTINUE;
 }
 
 void SDL_AppQuit(void* appstate, SDL_AppResult result) {