Add CommandManager::ShowWhichKey and include src in build

src/app/editor/system/command_manager.cc

@@ -0,0 +1,27 @@
+#include "command_manager.h"
+
+#include "imgui/imgui.h"
+
+namespace yaze {
+namespace app {
+namespace editor {
+
+// When the player presses Space, a popup will appear fixed to the bottom of the
+// ImGui window with a list of the available key commands which can be used.
+void CommandManager::ShowWhichKey() {
+  if (ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Space))) {
+    ImGui::OpenPopup("WhichKey");
+  }
+
+  if (ImGui::BeginPopup("WhichKey")) {
+    for (const auto& [shortcut, command] : commands_) {
+      ImGui::Text("%s: %s", shortcut.c_str(),
+                  command->GetDescription().c_str());
+    }
+    ImGui::EndPopup();
+  }
+}
+
+}  // namespace editor
+}  // namespace app
+}  // namespace yaze

src/app/editor/system/command_manager.h

@@ -1,6 +1,7 @@
 #ifndef YAZE_APP_EDITOR_SYSTEM_COMMAND_MANAGER_H
 #define YAZE_APP_EDITOR_SYSTEM_COMMAND_MANAGER_H
 
+#include <stack>
 #include <string>
 #include <unordered_map>
 
@@ -16,6 +17,8 @@ class Command {
 
 class CommandManager {
  public:
+  void ShowWhichKey();
+
   void RegisterCommand(const std::string& shortcut, Command* command) {
     commands_[shortcut] = command;
   }
@@ -50,4 +53,6 @@ class CommandManager {
 
 }  // namespace editor
 }  // namespace app
-}  // namespace yaze
+}  // namespace yaze
+
+#endif  // YAZE_APP_EDITOR_SYSTEM_COMMAND_MANAGER_H