3 files changed, 97 insertions, 0 deletions
diff --git a/include/cru/platform/gui/SaveOpenDialogOptions.hpp b/include/cru/platform/gui/SaveOpenDialogOptions.hpp
new file mode 100644
index 00000000..907ec808
--- /dev/null
+++ b/include/cru/platform/gui/SaveOpenDialogOptions.hpp
@@ -0,0 +1,81 @@
+#pragma once
+#include "Base.hpp"
+
+namespace cru::platform::gui {
+struct CRU_PLATFORM_GUI_API SaveDialogOptions {
+  String title;
+  String prompt;
+  String message;
+  std::vector<String> allowed_file_types;
+  bool allow_all_file_types = false;
+};
+
+struct CRU_PLATFORM_GUI_API OpenDialogOptions : SaveDialogOptions {
+  bool can_choose_files = true;
+  bool can_choose_directories = false;
+  bool allow_mulitple_selection = false;
+};
+
+template <typename T>
+struct CRU_PLATFORM_GUI_API SaveDialogOptionsBuilderTemplate {
+  T options;
+
+  SaveDialogOptionsBuilderTemplate& SetTitle(String title) {
+    options.title = std::move(title);
+    return *this;
+  }
+
+  SaveDialogOptionsBuilderTemplate& SetPrompt(String prompt) {
+    options.prompt = std::move(prompt);
+    return *this;
+  }
+
+  SaveDialogOptionsBuilderTemplate& SetMessage(String message) {
+    options.message = std::move(message);
+    return *this;
+  }
+
+  SaveDialogOptionsBuilderTemplate& SetAllowedFileTypes(
+      std::vector<String> allowed_file_types) {
+    options.allowed_file_types = std::move(allowed_file_types);
+    return *this;
+  }
+
+  SaveDialogOptionsBuilderTemplate& AddAllowedFileType(
+      String allowed_file_type) {
+    options.allowed_file_types.push_back(allowed_file_type);
+    return *this;
+  }
+
+  SaveDialogOptionsBuilderTemplate& SetAllowAllFileTypes(
+      bool allow_all_file_types) {
+    options.allow_all_file_types = allow_all_file_types;
+    return *this;
+  }
+
+  T Build() { return options; }
+};
+
+using SaveDialogOptionsBuilder =
+    SaveDialogOptionsBuilderTemplate<SaveDialogOptions>;
+
+struct CRU_PLATFORM_GUI_API OpenDialogOptionsBuilder
+    : SaveDialogOptionsBuilderTemplate<OpenDialogOptions> {
+  OpenDialogOptionsBuilder& SetCanChooseFiles(bool can_choose_files) {
+    options.can_choose_files = can_choose_files;
+    return *this;
+  }
+
+  OpenDialogOptionsBuilder& SetCanChooseDirectories(
+      bool can_choose_directories) {
+    options.can_choose_directories = can_choose_directories;
+    return *this;
+  }
+
+  OpenDialogOptionsBuilder& SetAllowMultipleSelection(
+      bool allow_mulitple_selection) {
+    options.allow_mulitple_selection = allow_mulitple_selection;
+    return *this;
+  }
+};
+}  // namespace cru::platform::gui
diff --git a/include/cru/platform/gui/UiApplication.hpp b/include/cru/platform/gui/UiApplication.hpp
index 5c22bd94..c917aa01 100644
--- a/include/cru/platform/gui/UiApplication.hpp
+++ b/include/cru/platform/gui/UiApplication.hpp
@@ -4,6 +4,8 @@
 #include "cru/common/Bitmask.hpp"
 #include "cru/platform/gui/Menu.hpp"
 
+#include "SaveOpenDialogOptions.hpp"
+
 #include <chrono>
 #include <functional>
 #include <memory>
@@ -60,5 +62,9 @@ struct CRU_PLATFORM_GUI_API IUiApplication : public virtual IPlatformResource {
 
   // If return nullptr, it means the menu is not supported.
   virtual IMenu* GetApplicationMenu();
+
+  virtual std::optional<String> ShowSaveDialog(SaveDialogOptions options);
+  virtual std::optional<std::vector<String>> ShowOpenDialog(
+      OpenDialogOptions options);
 };
 }  // namespace cru::platform::gui
diff --git a/src/platform/gui/UiApplication.cpp b/src/platform/gui/UiApplication.cpp
index 1f77653f..e58d34c9 100644
--- a/src/platform/gui/UiApplication.cpp
+++ b/src/platform/gui/UiApplication.cpp
@@ -14,4 +14,14 @@ IUiApplication::IUiApplication() {
 IUiApplication::~IUiApplication() { instance = nullptr; }
 
 IMenu* IUiApplication::GetApplicationMenu() { return nullptr; }
+
+std::optional<String> IUiApplication::ShowSaveDialog(
+    SaveDialogOptions options) {
+  throw Exception(u"Not implemented.");
+}
+
+std::optional<std::vector<String>> IUiApplication::ShowOpenDialog(
+    OpenDialogOptions options) {
+  throw Exception(u"Not implemented.");
+}
 }  // namespace cru::platform::gui