rename System/ImGuiConfig -> System/ImGui

and Add root window to use docking feature easily

CMakeLists.txt

@@ -120,7 +120,7 @@ target_sources(nf7
     file/sequencer_call.cc
     file/sequencer_timeline.cc
     file/system_dir.cc
-    file/system_imgui_config.cc
+    file/system_imgui.cc
     file/system_logger.cc
     file/system_native_file.cc
 )

common/gui_window.hh

@@ -15,6 +15,10 @@ namespace nf7::gui {
 
 class Window {
  public:
+  static std::string ConcatId(nf7::File& f, const std::string& name) noexcept {
+    return f.abspath().Stringify() + " | " + std::string {name};
+  }
+
   Window() = delete;
   Window(File& owner, std::string_view title, const gui::Window* src = nullptr) noexcept :
       owner_(&owner), title_(title),
@@ -54,7 +58,7 @@ class Window {
   }
 
   std::string id() const noexcept {
-    return owner_->abspath().Stringify() + " | " + title_;
+    return ConcatId(*owner_, title_);
   }
 
   bool shown() const noexcept { return shown_; }

file/system_imgui.cc

@@ -0,0 +1,82 @@
+#include <memory>
+#include <string>
+#include <string_view>
+#include <typeinfo>
+#include <utility>
+
+#include <imgui.h>
+
+#include <yas/serialize.hpp>
+#include <yas/types/std/string.hpp>
+#include <yas/types/std/string_view.hpp>
+
+#include "nf7.hh"
+
+#include "common/dir_item.hh"
+#include "common/generic_type_info.hh"
+#include "common/gui_window.hh"
+#include "common/ptr_selector.hh"
+
+
+using namespace std::literals;
+
+
+namespace nf7 {
+namespace {
+
+class ImGui_ final : public nf7::File, public nf7::DirItem {
+ public:
+  static inline const nf7::GenericTypeInfo<ImGui_> kType = {"System/ImGui", {}};
+
+  ImGui_(nf7::Env& env) noexcept :
+      nf7::File(kType, env), nf7::DirItem(nf7::DirItem::kNone) {
+  }
+  ImGui_(nf7::Env& env, Deserializer& ar) noexcept : ImGui_(env) {
+    std::string config;
+    ar(config);
+
+    if (config.size() > 0) {
+      ImGui::LoadIniSettingsFromMemory(config.data(), config.size());
+    }
+  }
+  void Serialize(Serializer& ar) const noexcept override {
+    size_t n;
+    const char* config = ImGui::SaveIniSettingsToMemory(&n);
+    ar(std::string_view(config, n));
+  }
+  std::unique_ptr<nf7::File> Clone(nf7::Env& env) const noexcept override {
+    return std::make_unique<ImGui_>(env);
+  }
+
+  void Update() noexcept override;
+
+  nf7::File::Interface* interface(const std::type_info& t) noexcept override {
+    return nf7::InterfaceSelector<nf7::DirItem>(t).Select(this);
+  }
+};
+
+void ImGui_::Update() noexcept {
+  constexpr auto kFlags =
+      ImGuiWindowFlags_NoBackground |
+      ImGuiWindowFlags_NoBringToFrontOnFocus |
+      ImGuiWindowFlags_NoDecoration |
+      ImGuiWindowFlags_NoMove |
+      ImGuiWindowFlags_NoNavFocus;
+  const auto id = nf7::gui::Window::ConcatId(*this, "Docking Root");
+
+  ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, {0, 0});
+  ImGui::SetNextWindowBgAlpha(0.f);
+  if (ImGui::Begin(id.c_str(), nullptr, kFlags)) {
+    const auto vp = ImGui::GetMainViewport();
+    ImGui::SetWindowPos({0, 0}, ImGuiCond_Always);
+    ImGui::SetWindowSize(vp->Size, ImGuiCond_Always);
+
+    ImGui::DockSpace(ImGui::GetID("DockSpace"), {0, 0},
+                     ImGuiDockNodeFlags_PassthruCentralNode);
+  }
+  ImGui::End();
+  ImGui::PopStyleVar(1);
+}
+
+}
+}  // namespace nf7

file/system_imgui_config.cc

@@ -1,67 +0,0 @@
-#include <memory>
-#include <string>
-#include <string_view>
-#include <typeinfo>
-#include <utility>
-
-#include <imgui.h>
-#include <yas/serialize.hpp>
-#include <yas/types/std/string.hpp>
-#include <yas/types/std/string_view.hpp>
-
-#include "nf7.hh"
-
-#include "common/dir_item.hh"
-#include "common/generic_type_info.hh"
-#include "common/ptr_selector.hh"
-
-
-using namespace std::literals;
-
-
-namespace nf7 {
-namespace {
-
-class ImGuiConfig final : public File, public nf7::DirItem {
- public:
-  static inline const GenericTypeInfo<ImGuiConfig> kType = {"System/ImGuiConfig", {}};
-
-  ImGuiConfig(Env& env) noexcept :
-      File(kType, env), DirItem(DirItem::kMenu) {
-  }
-  ImGuiConfig(Env& env, Deserializer& ar) noexcept : ImGuiConfig(env) {
-    std::string buf;
-    ar(buf);
-
-    if (buf.empty()) return;
-    ImGui::LoadIniSettingsFromMemory(buf.data(), buf.size());
-  }
-  void Serialize(Serializer& ar) const noexcept override {
-    if (std::exchange(const_cast<bool&>(skip_save_), false)) {
-      ar(""s);
-    } else {
-      size_t n;
-      const char* ini = ImGui::SaveIniSettingsToMemory(&n);
-      ar(std::string_view(ini, n));
-    }
-  }
-  std::unique_ptr<File> Clone(Env& env) const noexcept override {
-    return std::make_unique<ImGuiConfig>(env);
-  }
-
-  void UpdateMenu() noexcept override;
-
-  File::Interface* interface(const std::type_info& t) noexcept override {
-    return InterfaceSelector<nf7::DirItem>(t).Select(this);
-  }
-
- private:
-  bool skip_save_ = false;
-};
-
-void ImGuiConfig::UpdateMenu() noexcept {
-  ImGui::MenuItem("skip next serialization", nullptr, &skip_save_);
-}
-
-}
-}  // namespace nf7

tool/init.cc

@@ -47,7 +47,7 @@ int main(void) {
     { "_audio"s,
         Write(ar, "Audio/Context"s) },
     { "_imgui"s,
-        Write(ar, "System/ImGuiConfig"s, ""s) },
+        Write(ar, "System/ImGui"s, ""s) },
     { "_logger"s,
         Write(ar, "System/Logger"s, WINDOW_(true), 1024, false, false) },
     { "_luajit"s,