PIU_Stoper_Paszkwil

#define SCREEN_WIDTH 700
#define SCREEN_HEIGHT 600
#define TIMER_ID 1
#define BUFF_SIZE 128
#define ID_BUTTON1 1
#define ID_BUTTON2 2
#define ID_BUTTON3 3
#define ID_TEXTFIELD1 4

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

TCHAR className[] = TEXT("Class");
TCHAR appName[] = TEXT("Stoper");

HWND hwnd;
MSG msg;

void SetTimeInWindow(HWND& hwnd, UINT miliSeconds) {
    UINT value = miliSeconds;
    UINT minute = 0, second = 0, miliSecond = 0;

    if (value / 60000 >= 1) {
        minute = value / 60000;
        value -= (60000 * minute);
    }

    if (value / 1000 >= 1) {
        second = value / 1000;
        value -= (1000 * second);
    }

    miliSecond = value;

    TCHAR timeBuf[BUFF_SIZE];



    _swprintf(timeBuf, TEXT("%i:%i:%i"), minute, second, miliSecond);

    SetWindowText(hwnd, timeBuf);
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
    static HWND valueTextField, button1, button2, button3;
    static RECT clientRect;
    static SYSTEMTIME zeroTime, currentTime;
    static UINT miliSeconds = 0;
    static UINT test = 0;
    static bool isStart = false;

    switch (msg){
        case WM_CREATE: {
            SetTimer(hwnd, TIMER_ID, 1, NULL);
            GetClientRect(hwnd, &clientRect);

            HINSTANCE &hInstance = ((LPCREATESTRUCT)lParam)->hInstance;

            valueTextField = CreateWindowEx(0, TEXT("STATIC"), TEXT("00:00:00"), WS_CHILD | WS_VISIBLE | WS_BORDER, 0, 0, 0, 0, hwnd, (HMENU) ID_TEXTFIELD1, hInstance, 0);
            if (valueTextField == NULL) {
                MessageBox(NULL, TEXT("Some problem with CreateWindowEx by valueTextField"), className, MB_OK);
                return 1;
            }

            button1 = CreateWindowEx(0, TEXT("BUTTON"), TEXT("START"), WS_CHILD | WS_VISIBLE | WS_BORDER, 0, 0, 0, 0, hwnd, (HMENU)ID_BUTTON1, hInstance, 0);
            if (button1 == NULL) {
                MessageBox(NULL, TEXT("Some problem with CreateWindowEx by button"), className, MB_OK);
                return 1;
            }

            button2 = CreateWindowEx(0, TEXT("BUTTON"), TEXT("STOP"), WS_CHILD | WS_VISIBLE | WS_BORDER, 0, 0, 0, 0, hwnd, (HMENU)ID_BUTTON2, hInstance, 0);
            if (button2 == NULL) {
                MessageBox(NULL, TEXT("Some problem with CreateWindowEx by button1"), className, MB_OK);
                return 1;
            }

            button3 = CreateWindowEx(0, TEXT("BUTTON"), TEXT("RESET"), WS_CHILD | WS_VISIBLE | WS_BORDER, 0, 0, 0, 0, hwnd, (HMENU)ID_BUTTON3, hInstance, 0);
            if (button3 == NULL) {
                MessageBox(NULL, TEXT("Some problem with CreateWindowEx by button2"), className, MB_OK);
                return 1;
            }
            }break;

        case WM_TIMER: {
            if (isStart) {
                GetLocalTime(&currentTime);

                miliSeconds += (((currentTime.wMinute - zeroTime.wMinute) * 60000) + ((currentTime.wSecond - zeroTime.wSecond) * 1000) + (currentTime.wMilliseconds - zeroTime.wMilliseconds) - test);
                test = (((currentTime.wMinute - zeroTime.wMinute) * 60000) + ((currentTime.wSecond - zeroTime.wSecond) * 1000) + (currentTime.wMilliseconds - zeroTime.wMilliseconds));

                SetTimeInWindow(valueTextField, miliSeconds);
            }
            }break;

        case WM_SIZE: {
            GetClientRect(hwnd, &clientRect);

            MoveWindow(valueTextField, clientRect.right / 3, clientRect.bottom / 2.5, clientRect.right / 7, clientRect.bottom / 20, 1);
            MoveWindow(button1, clientRect.right / 3, clientRect.bottom / 2, clientRect.right / 7, clientRect.bottom / 20, 1);
            MoveWindow(button2, clientRect.right / 2, clientRect.bottom / 2, clientRect.right / 7, clientRect.bottom / 20, 1);
            MoveWindow(button3, clientRect.right / 2, clientRect.bottom / 2.5, clientRect.right / 7, clientRect.bottom / 20, 1);
            }break;

        case WM_GETMINMAXINFO:
            ((MINMAXINFO*)lParam)->ptMinTrackSize.x = 600;
            ((MINMAXINFO*)lParam)->ptMinTrackSize.y = 500;
            break;

        case WM_COMMAND:
            switch (wParam) {
                case ID_BUTTON1:
                    test = 0;
                    isStart = true;
                    GetLocalTime(&zeroTime);
                    break;

                case ID_BUTTON2:
                    isStart = false;
                    break;

                case ID_BUTTON3:
                    miliSeconds = test = 0;
                    isStart = false;
                    SetTimeInWindow(valueTextField, miliSeconds);
                    break;
            }
            break;

        case WM_CLOSE:
            DestroyWindow(hwnd);
            break;

        case WM_DESTROY: {
            KillTimer(hwnd, TIMER_ID);
            PostQuitMessage(0);
            }break;

        default:
            return DefWindowProc(hwnd, msg, wParam, lParam);
    }

    return 0;
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    WNDCLASSEX wc;
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.lpfnWndProc = WndProc;
    wc.lpszClassName = className;
    wc.lpszMenuName = NULL;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);

    if (RegisterClassEx(&wc) == 0) {
        MessageBox(NULL, TEXT("Some problem with RegisterClassEx"), className, MB_OK);
        return 1;
    }

    hwnd = CreateWindowEx(WS_EX_APPWINDOW | WS_EX_CLIENTEDGE, className, appName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, SCREEN_WIDTH, SCREEN_HEIGHT, 0, 0, hInstance, 0);
    if (hwnd == NULL) {
        MessageBox(NULL, TEXT("Some problem with CreateWindowEx by hwnd"), className, MB_OK);
        return 1;
    }

    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);

    while (GetMessage(&msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    UnregisterClass(className, hInstance);

    return msg.wParam;
}