PIU_KonwerterTemperatury

#include <windows.h>
#include <stdio.h>

LRESULT CALLBACK ProceduraOkna(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

const COLORREF backgroundColor = RGB(255, 255, 255);
HINSTANCE hInstance;
enum {CELSJUSZ, KELWIN, FAHRENHEIT};

bool RejestracjaOkna(WNDCLASSEX &window)
{
    window.cbSize = sizeof(WNDCLASSEX);
    window.style = CS_VREDRAW | CS_HREDRAW;
    window.lpfnWndProc = ProceduraOkna;
    window.cbClsExtra = 0;
    window.cbWndExtra = 0;
    window.hInstance = hInstance;
    window.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    window.hCursor = LoadCursor(NULL, IDC_ARROW);
    window.hbrBackground = (HBRUSH)CreateSolidBrush(backgroundColor);
    window.lpszMenuName = NULL;
    window.lpszClassName = "StandardoweOkno";
    window.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    if (!RegisterClassEx(&window))
    {
        MessageBox(NULL, "Problem z rejestracją okna", "Rejestracja okna", MB_ICONERROR | MB_OK);
        return false;
    }
    return true;
}


int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCMD)
{
    WNDCLASSEX window;
    if (!RejestracjaOkna(window))
        return 0;

    HWND uchwytOkna = 0;

    uchwytOkna = CreateWindowEx(
        0,
        "StandardoweOkno",
        "Pierwsze okno",
        WS_OVERLAPPEDWINDOW,
        100,
        100,
        260,
        200,
        0,
        0,
        hInstance,
        0);

    ShowWindow(uchwytOkna, SW_NORMAL);
    UpdateWindow(uchwytOkna);

    MSG msg;

    for (; ;)
    {
        if (0 != GetMessage(&msg, 0, 0, 0))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        if (msg.message == WM_QUIT) break;
    }

    return (int)msg.wParam;
}

LRESULT CALLBACK ProceduraOkna(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static HWND edit_C, edit_K, edit_F, static_C, static_K, static_F;
    switch (message)
    {
    case WM_CREATE:
    {
        HINSTANCE &hInstance = ((LPCREATESTRUCT)lParam)->hInstance;
        edit_C = CreateWindowEx(NULL, TEXT("EDIT"), NULL, WS_CHILD | WS_VISIBLE | WS_BORDER, 1, 2, 3, 4, hWnd, (HMENU)0, hInstance, NULL);
        edit_K = CreateWindowEx(NULL, TEXT("EDIT"), NULL, WS_CHILD | WS_VISIBLE | WS_BORDER, 5, 6, 7, 8, hWnd, (HMENU)1, hInstance, NULL);
        edit_F = CreateWindowEx(NULL, TEXT("EDIT"), NULL, WS_CHILD | WS_VISIBLE | WS_BORDER, 9, 10, 11, 12, hWnd, (HMENU)2, hInstance, NULL);
        static_C = CreateWindowEx(NULL, TEXT("STATIC"), TEXT("Celsjusz"), WS_CHILD | WS_VISIBLE | WS_BORDER, 13, 14, 15, 16, hWnd, (HMENU)3, hInstance, NULL);
        static_K = CreateWindowEx(NULL, TEXT("STATIC"), TEXT("Kelwin"), WS_CHILD | WS_VISIBLE | WS_BORDER, 17, 18, 19, 20, hWnd, (HMENU)4, hInstance, NULL);
        static_F = CreateWindowEx(NULL, TEXT("STATIC"), TEXT("Farenheit"), WS_CHILD | WS_VISIBLE | WS_BORDER, 21, 22, 23, 24, hWnd, (HMENU)5, hInstance, NULL);
    }
        break;
    case WM_SIZE:
    {
        RECT clientRect;
        GetClientRect(hWnd, &clientRect);
        int xEdit = (clientRect.right - 50) / 2;
        int y = 10;
        int xStatic = (clientRect.right - 190) / 2;
        int widthEdit = 100;
        int height = 20;
        int widthStatic = 70;

        /////////////////////////////////////////////////////////////////////////
        MoveWindow(static_C, xStatic, y, widthStatic, height, TRUE);
        MoveWindow(edit_C, xEdit, y, widthEdit, height, TRUE);
        /////////////////////////////////////////////////////////////////////////
        MoveWindow(static_K, xStatic, y += height + 10, widthStatic, height, TRUE);
        MoveWindow(edit_K, xEdit, y, widthEdit, height, TRUE);
        /////////////////////////////////////////////////////////////////////////
        MoveWindow(static_F, xStatic, y += height + 10, widthStatic, height, TRUE);
        MoveWindow(edit_F, xEdit, y, widthEdit, height, TRUE);
        /////////////////////////////////////////////////////////////////////////
    }
        break;
    case WM_COMMAND:
    {
        static char buff[11];
        static double temp_C = 0;
        static double temp_K = 0;
        static double temp_F = 0;
        switch (LOWORD(wParam))
        {
        case CELSJUSZ:
        {
            if (GetFocus() != (HWND)lParam)
                break;
            GetWindowTextA(edit_C, buff, 10);
            temp_C = atof(buff);
            temp_K = temp_C + 273.15;
            temp_F = 1.8 * temp_C + 32;
            sprintf_s(buff, "%.2lf", temp_K);
            SetWindowTextA(edit_K, buff);
            sprintf_s(buff, "%.2lf", temp_F);
            SetWindowTextA(edit_F, buff);
        }
        break;
        case KELWIN:
        {
            if (GetFocus() != (HWND)lParam)
                break;
            GetWindowTextA(edit_K, buff, 10);
            temp_K = atof(buff);
            temp_C = temp_K - 273.15;
            temp_F = 1.8 * temp_C + 32;
            sprintf_s(buff, "%.2lf", temp_C);
            SetWindowTextA(edit_C, buff);
            sprintf_s(buff, "%.2lf", temp_F);
            SetWindowTextA(edit_F, buff);
        }
        break;
        case FAHRENHEIT:
        {
            if (GetFocus() != (HWND)lParam)
                break;
            GetWindowTextA(edit_F, buff, 10);
            temp_F = atof(buff);
            temp_C = (5.0/9.0) * (temp_F -32);
            temp_K = temp_C + 273.15;
            sprintf_s(buff, "%.2lf", temp_C);
            SetWindowTextA(edit_C, buff);
            sprintf_s(buff, "%.2lf", temp_K);
            SetWindowTextA(edit_K, buff);
        }
        break;
        }
    }
    break;
    case WM_GETMINMAXINFO:
        ((MINMAXINFO*)lParam)->ptMinTrackSize.x = 260;
        ((MINMAXINFO*)lParam)->ptMinTrackSize.y = 200;
        break;
    case WM_CLOSE:
        if (MessageBox(hWnd, "Czy chcesz zakonczyc dzialanie programu?", "Dzialanie programu", MB_YESNO | MB_ICONERROR) == IDNO)
            break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}