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#include "application.h"
#include "timer.h"
#include "ui/window.h"
#include "graph/graph.h"
namespace cru {
constexpr int invoke_later_message_id = WM_USER + 2000;
Application* Application::instance_ = nullptr;
Application * Application::GetInstance() {
return instance_;
}
Application::Application(HINSTANCE h_instance)
: h_instance_(h_instance) {
if (instance_)
throw std::runtime_error("A application instance already exists.");
instance_ = this;
window_manager_ = std::make_unique<ui::WindowManager>();
graph_manager_ = std::make_unique<graph::GraphManager>();
timer_manager_ = std::make_unique<TimerManager>();
}
Application::~Application()
{
instance_ = nullptr;
}
int Application::Run()
{
MSG msg;
while (GetMessage(&msg, nullptr, 0, 0))
{
if (!HandleThreadMessage(msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return static_cast<int>(msg.wParam);
}
void Application::Quit(const int quit_code) {
::PostQuitMessage(quit_code);
}
bool Application::HandleThreadMessage(const MSG& message)
{
if (message.hwnd != nullptr)
return false;
switch (message.message)
{
case invoke_later_message_id:
{
const auto p_action = reinterpret_cast<InvokeLaterAction*>(message.wParam);
(*p_action)();
delete p_action;
return true;
}
case WM_TIMER:
{
const auto action = timer_manager_->GetAction(static_cast<UINT_PTR>(message.wParam));
if (action.has_value())
{
action.value()();
return true;
}
break;
}
default:
return false;
}
return false;
}
void InvokeLater(InvokeLaterAction&& action) {
//copy the action to a safe place
auto p_action_copy = new InvokeLaterAction(std::move(action));
PostMessage(
nullptr,
invoke_later_message_id,
reinterpret_cast<WPARAM>(p_action_copy),
0
);
}
}
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