如何设置平滑过渡的 Windows 10 桌面背景？

Question

我正在使用以下代码更改我的 windows 桌面背景

ctypes.windll.user32.SystemParametersInfoW(20, 0, "C:/image/jkk7LGN03aY.jpg" , 0)

我的image 目录有很多图片，我将它们一一设置如下

for path in image_list:
    ctypes.windll.user32.SystemParametersInfoW(20, 0, path , 0)
    time.sleep(5)

桌面背景图片突然变化，但我想要平滑过渡。我该怎么做？

Answer 1

这是一个我经常使用的纯 Python sn-p：

它使用pywin32 启用活动桌面并使用平滑过渡设置壁纸（确保您没有禁用窗口效果，否则您将看不到任何淡入淡出效果）

import ctypes
from typing import List

import pythoncom
import pywintypes
import win32gui
from win32com.shell import shell, shellcon

user32 = ctypes.windll.user32


def _make_filter(class_name: str, title: str):
    """https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-enumwindows"""

    def enum_windows(handle: int, h_list: list):
        if not (class_name or title):
            h_list.append(handle)
        if class_name and class_name not in win32gui.GetClassName(handle):
            return True  # continue enumeration
        if title and title not in win32gui.GetWindowText(handle):
            return True  # continue enumeration
        h_list.append(handle)

    return enum_windows


def find_window_handles(parent: int = None, window_class: str = None, title: str = None) -> List[int]:
    cb = _make_filter(window_class, title)
    try:
        handle_list = []
        if parent:
            win32gui.EnumChildWindows(parent, cb, handle_list)
        else:
            win32gui.EnumWindows(cb, handle_list)
        return handle_list
    except pywintypes.error:
        return []


def force_refresh():
    user32.UpdatePerUserSystemParameters(1)


def enable_activedesktop():
    """https://stackoverflow.com/a/16351170"""
    try:
        progman = find_window_handles(window_class='Progman')[0]
        cryptic_params = (0x52c, 0, 0, 0, 500, None)
        user32.SendMessageTimeoutW(progman, *cryptic_params)
    except IndexError as e:
        raise WindowsError('Cannot enable Active Desktop') from e


def set_wallpaper(image_path: str, use_activedesktop: bool = True):
    if use_activedesktop:
        enable_activedesktop()
    pythoncom.CoInitialize()
    iad = pythoncom.CoCreateInstance(shell.CLSID_ActiveDesktop,
                                     None,
                                     pythoncom.CLSCTX_INPROC_SERVER,
                                     shell.IID_IActiveDesktop)
    iad.SetWallpaper(str(image_path), 0)
    iad.ApplyChanges(shellcon.AD_APPLY_ALL)
    force_refresh()


if __name__ == '__main__':
    set_wallpaper(r'D:\Wallpapers\Cool\enchanted_mountain_4k.jpg')