UI Screenshots

pip install playwright Pillow -q
playwright install chromium

from playwright.async_api import async_playwright

async def capture(url="http://localhost:3000", out="screenshot-raw.png", width=1400, height=5000):
    async with async_playwright() as p:
        browser = await p.chromium.launch()
        page = await browser.new_page(viewport={"width": width, "height": height})
        await page.goto(url, wait_until="networkidle")
        await page.wait_for_timeout(4000)  # let charts/animations render
        await page.screenshot(path=out, full_page=True)
        await browser.close()

from PIL import Image

img = Image.open("screenshot-raw.png")
cropped = img.crop((left, top, right, bottom))  # adjust based on what you see
cropped.save("screenshot-final.png")

element = page.locator("selector").first
await element.hover()
await page.wait_for_timeout(1000)  # let tooltip appear
await page.screenshot(path="screenshot-hover.png", full_page=True)

await element.click()
await page.mouse.move(300, 300)  # move away so hover doesn't show
await page.wait_for_timeout(500)
await page.screenshot(path="screenshot-selected.png", full_page=True)

img.crop((0, 200, 920, 900)).save("screenshot-header.png")
img.crop((0, 900, 920, 1600)).save("screenshot-main.png")

import ctypes
from ctypes import c_int, Structure, byref, windll
import mss
from PIL import Image

user32 = windll.user32

def find_window(title_contains):
    """Find visible windows matching a title substring."""
    results = []
    WNDENUMPROC = ctypes.WINFUNCTYPE(ctypes.c_bool, ctypes.c_void_p, ctypes.c_void_p)
    def cb(hwnd, _):
        if user32.IsWindowVisible(hwnd):
            buf = ctypes.create_unicode_buffer(256)
            user32.GetWindowTextW(hwnd, buf, 256)
            if title_contains.lower() in buf.value.lower():
                results.append((hwnd, buf.value))
        return True
    user32.EnumWindows(WNDENUMPROC(cb), 0)
    return results

def capture_window(title_contains, output_path):
    """Capture a window by title substring."""
    windows = find_window(title_contains)
    if not windows:
        raise ValueError(f"No window matching '{title_contains}'")
    hwnd = windows[0][0]

    class RECT(Structure):
        _fields_ = [('left', c_int), ('top', c_int), ('right', c_int), ('bottom', c_int)]
    rect = RECT()
    user32.GetWindowRect(hwnd, byref(rect))
    w, h = rect.right - rect.left, rect.bottom - rect.top

    with mss.mss() as sct:
        shot = sct.grab({'left': rect.left, 'top': rect.top, 'width': w, 'height': h})
        img = Image.frombytes('RGB', shot.size, shot.rgb)
        img.save(output_path)
        return img

# Usage:
capture_window('Visual Studio Code', 'vscode-capture.png')

const { _electron: electron } = require('playwright');
const app = await electron.launch({
    executablePath: 'C:\\Program Files\\Microsoft VS Code\\Code.exe',
    args: ['--new-window', '--disable-extensions', '--user-data-dir=' + tmpDir]
});
const window = await app.firstWindow();
await window.waitForLoadState('domcontentloaded');

// Minimize immediately — captures still work via CDP
await app.evaluate(({ BrowserWindow }) => {
    BrowserWindow.getAllWindows()[0].minimize();
});

await window.screenshot({ path: 'capture.png' }); // works while minimized!
await app.close();