#include <windows.h>
#include <windowsx.h>
#include <tchar.h>
#include <cmath>

#define PI 3.14159265

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

VOID CALLBACK TimerEvent( HWND window, UINT Msg, UINT_PTR EventID, DWORD SYSTime);

int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
	LPSTR lpCmdLine, int nCmdShow )
{
	MSG  msg ;    
	WNDCLASS wc;
	ZeroMemory(&wc, sizeof(wc));

	wc.lpszClassName = TEXT( "Timer" );
	wc.hInstance     = hInstance ;
	wc.hbrBackground = CreateSolidBrush(RGB(255,255,255));
	wc.lpfnWndProc   = WndProc ;
	wc.hCursor       = LoadCursor(0, IDC_ARROW);


	RegisterClass(&wc);
	CreateWindow( wc.lpszClassName, TEXT("Stop Watch"),
		WS_SYSMENU | WS_VISIBLE,
		150, 150, 230, 230, 0, 0, hInstance, 0);  

	while( GetMessage(&msg, NULL, 0, 0)) {
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return (int) msg.wParam;
}

const double mdeg = 270;
double SecDeg = mdeg;
double MinDeg = mdeg;
int globTime = 0;

int CalculateTime(int time)
{
	int csec = time;
	do 
	{

		if(csec - 60 <= 0)
			break;
		csec -= 60;

	} while (1);

	return csec << 16 | ((time - csec) / 60);
}

LRESULT CALLBACK WndProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
	static HWND MenuItems[3] = {0};
	static POINT pt = {230/2, 230/2 - 40};
	static int widthLine = 70;

	switch(msg)  
	{
	case WM_CREATE:
		{
			MenuItems[0] = CreateWindow(TEXT("button"), TEXT("Старт"),    
				WS_VISIBLE | WS_CHILD | BS_PUSHBUTTON,
				120, 150, 80, 25,        
				hwnd, (HMENU) 1, NULL, NULL);  

			MenuItems[1] = CreateWindow(TEXT("button"), TEXT("Стоп"),    
				WS_VISIBLE | WS_CHILD | BS_PUSHBUTTON,
				20, 150, 80, 25,        
				hwnd, (HMENU) 2, NULL, NULL);

			break;
		}

	case WM_COMMAND:
		{
			if(HIWORD(wParam) == BN_CLICKED)
			{
				if (LOWORD(wParam) == 1) 
				{
					SecDeg = mdeg;
					globTime = 0;
					KillTimer(hwnd, 1);
					SetTimer(hwnd, 1, 1000, TimerEvent);
				} 
				else if(LOWORD(wParam) == 2)
				{
					SecDeg = mdeg;
					globTime = 0;
					InvalidateRect(hwnd, 0, true);
					KillTimer(hwnd, 1);
				}
			}
			break;
		}
	case WM_PAINT:
		{
			PAINTSTRUCT ps;

			HDC hd = BeginPaint(hwnd, &ps);

			MoveToEx(hd, pt.x, pt.y, 0);
			for(int i=0;i<360;i+=6)
			{
				SetPixel(hd, pt.x + (cos(i*PI/180)*(widthLine+1)), pt.y + (cos((180-(i+90))*PI/180)*(widthLine + 1)), RGB(0,0,0));
			}

			for(int i=0;i<360;i+=30)
			{
				Rectangle(hd, pt.x + (cos(i*PI/180)*(widthLine + 1)), pt.y + (cos((180-(i+90))*PI/180)*(widthLine + 1)), pt.x + (cos(i*PI/180)*(widthLine + 4)), pt.y + (cos((180-(i+90))*PI/180)*(widthLine + 4)));
			}
			
			SecDeg = mdeg + (CalculateTime(globTime) >> 16) * 6;
			MinDeg = mdeg + (CalculateTime(globTime) & 0xFFFF) * 6;

			SelectPen(hd, CreatePen(PS_SOLID, 2, RGB(0,0,255)));
			LineTo(hd,pt.x + (cos(SecDeg*PI/180)*widthLine),pt.y + (cos((180-(SecDeg+90))*PI/180)*(widthLine)));

			SelectPen(hd, CreatePen(PS_SOLID, 2, RGB(255,0,0)));
			MoveToEx(hd, pt.x, pt.y, 0);

			LineTo(hd,pt.x + (cos(MinDeg*PI/180)*widthLine / 2),pt.y + (cos((180-(MinDeg+90))*PI/180)*(widthLine)/2));

			EndPaint(hwnd, &ps);
			break;
		}
	case WM_DESTROY:
		{
			KillTimer(hwnd, 1);
			PostQuitMessage(0);
			break;
		}
	}
	return DefWindowProc(hwnd, msg, wParam, lParam);
}

VOID CALLBACK TimerEvent( HWND window, UINT Msg, UINT_PTR EventID, DWORD SYSTime)
{
	globTime++;
	InvalidateRect(window, 0, true);
}