BaseWindow.h

#ifndef __BaseWindow_h__
#define __BaseWindow_h__

template <class DERIVED_TYPE>
class BaseWindow {
public:
	static LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
		DERIVED_TYPE* pThis = NULL;

		if (uMsg == WM_NCCREATE) {
			CREATESTRUCT* pCreate = (CREATESTRUCT*)lParam;
			pThis = (DERIVED_TYPE*)pCreate->lpCreateParams;
			SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)pThis);

			pThis->m_hwnd = hwnd;
		}
		else {
			pThis = (DERIVED_TYPE*)GetWindowLongPtr(hwnd, GWLP_USERDATA);
		}

		if (pThis) {
			return pThis->HandleMessage(uMsg, wParam, lParam);
		}
		else {
			return DefWindowProc(hwnd, uMsg, wParam, lParam);
		}
	}

	BaseWindow() :m_hwnd(NULL) {} //¹¹Ô캯Êý

	BOOL Create(
		PCWSTR lpWindowName,
		DWORD dwStyle,
		DWORD dwExStyle = 0,
		int x = CW_USEDEFAULT,
		int y = CW_USEDEFAULT,
		int nWidth = CW_USEDEFAULT,
		int nHeight = CW_USEDEFAULT,
		HWND hWndParent = 0,
		HMENU hMenu = 0
	) {
		WNDCLASS wc = {};

		wc.lpfnWndProc = DERIVED_TYPE::WindowProc;
		wc.hInstance = GetModuleHandle(NULL);
		wc.lpszClassName = ClassName();

		RegisterClass(&wc);

		m_hwnd = CreateWindowEx(
			dwExStyle, ClassName(), lpWindowName, dwStyle, x, y, nWidth, nHeight,
			hWndParent, hMenu, wc.hInstance, this
		);

		return(m_hwnd ? TRUE : FALSE);
	}

	HWND Window() const { return m_hwnd; }

protected:
	virtual PCWSTR ClassName() const = 0;
	virtual LRESULT HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam) = 0;

	HWND m_hwnd;
};

#endif // !__BaseWindow_h__