startup_pet.c

#include <windows.h>
#include <stdlib.h>
#include <time.h>

#define PET_COUNT 5
#define TIMER_ID 1
#define TIMER_INTERVAL 500

typedef struct {
    const char *name;
    const char *art_open;
    const char *art_closed;
} Pet;

Pet pets[PET_COUNT];
Pet currentPet;
int blink = 0;

// Window procedure
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
    switch (msg) {
        case WM_TIMER:
            blink = !blink;
            InvalidateRect(hwnd, NULL, TRUE);
            return 0;

        case WM_PAINT: {
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(hwnd, &ps);
            RECT rect;
            GetClientRect(hwnd, &rect);
            SetBkMode(hdc, TRANSPARENT);
            SetTextColor(hdc, RGB(255, 105, 180)); // cute pink

            HFONT hFont = CreateFont(32, 16, 0, 0, FW_BOLD, FALSE, FALSE, FALSE,
                                     DEFAULT_CHARSET, OUT_OUTLINE_PRECIS,
                                     CLIP_DEFAULT_PRECIS, ANTIALIASED_QUALITY,
                                     FF_DONTCARE, TEXT("Consolas"));
            SelectObject(hdc, hFont);

            const char *art = blink ? currentPet.art_closed : currentPet.art_open;
            DrawText(hdc, art, -1, &rect, DT_CENTER | DT_VCENTER | DT_NOCLIP | DT_WORDBREAK);

            DeleteObject(hFont);
            EndPaint(hwnd, &ps);
            return 0;
        }

        case WM_KEYDOWN:
            if (wParam == VK_ESCAPE) DestroyWindow(hwnd); // ESC closes pet
            return 0;

        case WM_LBUTTONDOWN:
        case WM_RBUTTONDOWN:
            DestroyWindow(hwnd); // click closes pet
            return 0;

        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;
    }
    return DefWindowProc(hwnd, msg, wParam, lParam);
}

// Initialize pets
void initPets() {
    srand((unsigned int)time(NULL));

    pets[0] = (Pet){"Buddy",
        " / \\__\n( o_o )\n /     O\nDog",
        " / \\__\n( -_- )\n /     O\nDog"};

    pets[1] = (Pet){"Whiskers",
        " |\\---/|\n | o_o |\n  \\_^_/\nCat",
        " |\\---/|\n | -_- |\n  \\_^_/\nCat"};

    pets[2] = (Pet){"Bubbles",
        " ><(((('>\nFish",
        " ><(((('>\nFish"};

    pets[3] = (Pet){"Thumper",
        " (\\_/)\n (•_•)\n / >🥕\nBunny",
        " (\\_/)\n (-_-) \n / >🥕\nBunny"};

    pets[4] = (Pet){"Sunny",
        "   \\_v_/\n   (o o)\n   ( - )\nParrot",
        "   \\_v_/\n   (- -)\n   ( - )\nParrot"};

    currentPet = pets[rand() % PET_COUNT];
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine, int nCmdShow) {
    initPets();

    const char CLASS_NAME[] = "FloatingPet";

    WNDCLASS wc = {0};
    wc.lpfnWndProc = WndProc;
    wc.hInstance = hInstance;
    wc.lpszClassName = CLASS_NAME;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    RegisterClass(&wc);

    HWND hwnd = CreateWindowEx(
        WS_EX_TOPMOST | WS_EX_LAYERED | WS_EX_TOOLWINDOW,
        CLASS_NAME,
        currentPet.name,
        WS_POPUP,
        100, 100, 400, 200,
        NULL, NULL, hInstance, NULL
    );

    SetLayeredWindowAttributes(hwnd, 0, 255, LWA_ALPHA);
    ShowWindow(hwnd, SW_SHOW);

    SetTimer(hwnd, TIMER_ID, TIMER_INTERVAL, NULL);

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

    return 0;
}