UI for rom info

src/UI/RomInfo.cpp

@@ -1,5 +1,7 @@
 #include "RomInfo.h"
 
+#include <filesystem>
+
 #include "imgui.h"
 
 RomInfo::RomInfo(
@@ -10,11 +12,33 @@ RomInfo::RomInfo(
     machine_state{std::move(machine_state)},
     callback_manager{std::move(callback_manager)}
 {
+    this->callback_manager->rom_load_callback.push_back(std::bind(
+        &RomInfo::on_rom_load,
+        this,
+        std::placeholders::_1
+    ));
 }
 
 void RomInfo::render()
 {
     if (ImGui::Begin("Chip-8 - ROM Info"))
     {
+        if (!this->rom_path.empty())
+        {
+            ImGui::Text("ROM: %s", this->rom_path.c_str());
+        }
+        else
+        {
+            ImGui::Text("ROM: None");
+        }
     }
+    ImGui::End();
+}
+
+void RomInfo::on_rom_load(const std::string& rom_path)
+{
+    std::filesystem::path home = SDL_GetUserFolder(SDL_FOLDER_HOME);
+    std::filesystem::path path = rom_path;
+
+    this->rom_path = std::filesystem::relative(path, home).string();
 }