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1 files changed, 61 insertions, 0 deletions

diff --git a/src/win/gui/TimerManager.h b/src/win/gui/TimerManager.h
new file mode 100644
index 00000000..c44bd5bd
--- /dev/null
+++ b/src/win/gui/TimerManager.h
@@ -0,0 +1,61 @@
+#pragma once
+#include "cru/common/Event.h"
+#include "cru/win/WinPreConfig.h"
+
+#include "cru/common/Base.h"
+#include "cru/win/gui/GodWindow.h"
+#include "cru/win/gui/WindowNativeMessageEventArgs.h"
+
+#include <chrono>
+#include <functional>
+#include <optional>
+#include <unordered_map>
+
+namespace cru::platform::gui::win {
+enum class TimerType { Immediate, Timeout, Interval };
+
+struct TimerInfo {
+  TimerInfo(long long id, TimerType type, int period,
+            std::function<void()> action, UINT_PTR native_timer_id = 0)
+      : id(id),
+        type(type),
+        period(period),
+        action(std::move(action)),
+        native_timer_id(native_timer_id) {}
+
+  long long id;
+  TimerType type;
+  int period;  // in milliseconds
+  std::function<void()> action;
+  UINT_PTR native_timer_id;
+};
+
+class TimerManager : public Object {
+ public:
+  TimerManager(GodWindow* god_window);
+
+  CRU_DELETE_COPY(TimerManager)
+  CRU_DELETE_MOVE(TimerManager)
+
+  ~TimerManager() override = default;
+
+  // Period is in milliseconds. When type is immediate, it is not checked and
+  // used.
+  long long SetTimer(TimerType type, int period, std::function<void()> action);
+  void CancelTimer(long long id);
+
+ private:
+  void HandleGodWindowMessage(WindowNativeMessageEventArgs& args);
+
+  void CreateNativeTimer(TimerInfo* info);
+  void KillNativeTimer(TimerInfo* info);
+
+ private:
+  GodWindow* god_window_;
+
+  EventRevokerListGuard event_guard_;
+
+  long long next_id_ = 1;
+  std::unordered_map<long long, TimerInfo> info_map_;
+};
+}  // namespace cru::platform::gui::win