1 files changed, 70 insertions, 0 deletions
diff --git a/src/platform_win/win_application.cpp b/src/platform_win/win_application.cpp
new file mode 100644
index 00000000..a90f509c
--- /dev/null
+++ b/src/platform_win/win_application.cpp
@@ -0,0 +1,70 @@
+#include "cru/platform/win/win_application.hpp"
+
+#include <VersionHelpers.h>
+
+#include "cru/platform/win/exception.hpp"
+#include "cru/platform/win/god_window.hpp"
+#include "god_window_message.hpp"
+#include "timer.hpp"
+
+namespace cru::platform::win {
+WinApplication* WinApplication::instance_ = nullptr;
+
+WinApplication* WinApplication::GetInstance() {
+  if (instance_ == nullptr)
+    instance_ = new WinApplication(::GetModuleHandleW(nullptr));
+  return instance_;
+}
+
+WinApplication::WinApplication(HINSTANCE h_instance) : h_instance_(h_instance) {
+  if (instance_)
+    throw std::runtime_error("A application instance already exists.");
+
+  instance_ = this;
+
+  if (!::IsWindows8OrGreater())
+    throw std::runtime_error("Must run on Windows 8 or later.");
+
+  god_window_ = std::make_shared<GodWindow>(this);
+  timer_manager_ = std::make_shared<TimerManager>(god_window_.get());
+}
+
+WinApplication::~WinApplication() { instance_ = nullptr; }
+
+int WinApplication::Run() {
+  MSG msg;
+  while (GetMessageW(&msg, nullptr, 0, 0)) {
+    TranslateMessage(&msg);
+    DispatchMessageW(&msg);
+  }
+  return static_cast<int>(msg.wParam);
+}
+
+void WinApplication::Quit(const int quit_code) { ::PostQuitMessage(quit_code); }
+
+void WinApplication::InvokeLater(const std::function<void()>& action) {
+  // copy the action to a safe place
+  auto p_action_copy = new std::function<void()>(action);
+
+  if (PostMessageW(GetGodWindow()->GetHandle(), invoke_later_message_id,
+                   reinterpret_cast<WPARAM>(p_action_copy), 0) == 0)
+    throw Win32Error(::GetLastError(), "InvokeLater failed to post message.");
+}
+
+unsigned long WinApplication::SetTimeout(std::chrono::milliseconds milliseconds,
+                                         const std::function<void()>& action) {
+  return static_cast<unsigned long>(timer_manager_->CreateTimer(
+      static_cast<UINT>(milliseconds.count()), false, action));
+}
+
+unsigned long WinApplication::SetInterval(
+    std::chrono::milliseconds milliseconds,
+    const std::function<void()>& action) {
+  return static_cast<unsigned long>(timer_manager_->CreateTimer(
+      static_cast<UINT>(milliseconds.count()), true, action));
+}
+
+void WinApplication::CancelTimer(unsigned long id) {
+  timer_manager_->KillTimer(static_cast<UINT_PTR>(id));
+}
+}  // namespace cru::platform::win