Improved Borderless Windows (shadows and Windows 11 rounded edges)

[yllhwa]

Specification

• pywebview version: 4.4.1
• operating system: Windows 11
• web renderer: edgechromium

Description

By default, borderless windows lose shadows and rounded corners.

Use the following code to create an unbounded window with shadows and rounded corners(looks much better now).

import webview
import ctypes
import ctypes.wintypes
import win32process, win32gui
import os

def DwmSetWindowAttribute(hwnd, attr, value, size=4):
    DwmSetWindowAttribute = ctypes.windll.dwmapi.DwmSetWindowAttribute
    DwmSetWindowAttribute.argtypes = [ctypes.wintypes.HWND, ctypes.wintypes.DWORD, ctypes.c_void_p, ctypes.wintypes.DWORD]
    return DwmSetWindowAttribute(hwnd, attr, ctypes.byref(ctypes.c_int(value)), size)

def ExtendFrameIntoClientArea(hwnd):

    class _MARGINS(ctypes.Structure):
        _fields_ = [("cxLeftWidth", ctypes.c_int),
                    ("cxRightWidth", ctypes.c_int),
                    ("cyTopHeight", ctypes.c_int),
                    ("cyBottomHeight", ctypes.c_int)
                    ]

    DwmExtendFrameIntoClientArea = ctypes.windll.dwmapi.DwmExtendFrameIntoClientArea
    m = _MARGINS()
    m.cxLeftWidth = 1
    m.cxRightWidth = 1
    m.cyTopHeight = 1
    m.cyBottomHeight = 1
    return DwmExtendFrameIntoClientArea(hwnd, ctypes.byref(m))

def get_hwnds_for_pid(pid):
    hwnds = []
    def callback(hwnd, hwnds):
        if win32gui.IsWindowVisible(hwnd) and win32gui.IsWindowEnabled(hwnd):
            found_tid, found_pid = win32process.GetWindowThreadProcessId(hwnd)
            if found_pid == pid:
                hwnds.append(hwnd)
            return True
    win32gui.EnumWindows(callback, hwnds)
    return hwnds

def setup_all_windows_borderless():
    hwnds = get_hwnds_for_pid(os.getpid())
    print(hwnds)
    for hwnd in hwnds:
        DwmSetWindowAttribute(hwnd, 2, 2, 4)
        ExtendFrameIntoClientArea(hwnd)

if __name__ == '__main__':
    window = webview.create_window('test', "https://example.com/", frameless=True, height=300)
    window.events.loaded += setup_all_windows_borderless
    webview.start()

can this feature be built-in into the library(like electron/wails/tauri)?

Additionally, the method of getting handles is not elegant and may be more convenient to implement internally

Practicalities

• YES I am willing to work on this issue myself(this seems like a big project, I may not be able to do much).

• NO I am prepared to support this issue financially.

[paulocoutinhox]

+1

[ylm-king]

good!

[r0x0r]

Looks good. Feel free to create a PR.

[github-actions[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.