WS_EX_TOPMOST 似乎什么也没做

Question

我有一个

pyglet

Window 子类，它在他的

__init__

函数中得到了这个。每个标志都有效，但

WS_EX_TOPMOST

。

hwnd = self._hwnd # type: ignore

GWL_EXSTYLE = -20
WS_EX_LAYERED = 0x80000
WS_EX_TOOLWINDOW = 0x00000080
WS_EX_TOPMOST = 0x00000008
LWA_COLORCODE = 0x1

ex_style = windll.user32.GetWindowLongW(hwnd, GWL_EXSTYLE)
windll.user32.SetWindowLongW(hwnd, GWL_EXSTYLE, ex_style | WS_EX_LAYERED | WS_EX_TOOLWINDOW | WS_EX_TOPMOST)
windll.user32.SetLayeredWindowAttributes(hwnd, 0, 255, LWA_COLORCODE)
windll.user32.SetWindowPos(hwnd, -1, 0, 0, 0, 0, 0x0001 | 0x0002)

完整的

__init__

代码一团糟，但我也会提供它以防止任何误解。

    def __init__(self, *args, **kwargs):

        # Overriding something for beauty's sake
        kwargs['style'] = 'borderless'
        kwargs['width'] = bg_img.width
        kwargs['height'] = screen.height
        super().__init__(*args, **kwargs)
        glClearColor(0, 0, 0, 0)

        # Doing some unusual low-level gibberish to explain Windows how our pyglet app should behave and look like
        hwnd = self._hwnd # type: ignore
        GWL_EXSTYLE = -20
        WS_EX_LAYERED = 0x80000
        WS_EX_TOOLWINDOW = 0x00000080
        WS_EX_TOPMOST = 0x00000008
        LWA_COLORCODE = 0x1
        ex_style = windll.user32.GetWindowLongW(hwnd, GWL_EXSTYLE)
        windll.user32.SetWindowLongW(hwnd, GWL_EXSTYLE, ex_style | WS_EX_LAYERED | WS_EX_TOOLWINDOW | WS_EX_TOPMOST)
        windll.user32.SetLayeredWindowAttributes(hwnd, 0, 255, LWA_COLORCODE)
        windll.user32.SetWindowPos(hwnd, -1, 0, 0, 0, 0, 0x0001 | 0x0002)

        self.set_location(screen.width - self.width, 0)

        self.shown = True

        self.cursors = {
            'default': self.get_system_mouse_cursor(Window.CURSOR_DEFAULT),
            'hand': self.get_system_mouse_cursor(Window.CURSOR_HAND)
        }

        # omelette w/ bacon
        self.batch = Batch()
        self.bg = Sprite(bg_img, batch = self.batch)

Answer 1

WS_EX_TOPMOST

扩展样式用于使窗口始终出现在所有其他窗口的top上。 但是，单独设置

WS_EX_TOPMOST

不会自动将窗口带到 Z 顺序的顶部。您还需要使用

SetWindowPos

指定窗口位置，因此您需要通过更新这部分代码来确保窗口位于最顶层：

    .....
        # new styles
        windll.user32.SetWindowLongW(hwnd, GWL_EXSTYLE, ex_style | WS_EX_LAYERED | WS_EX_TOOLWINDOW | WS_EX_TOPMOST)
        windll.user32.SetLayeredWindowAttributes(hwnd, 0, 255, LWA_COLORCODE)

        # topmost window
        HWND_TOPMOST = -1
        SWP_NOSIZE = 0x0001
        SWP_NOMOVE = 0x0002
        SWP_SHOWWINDOW = 0x0040
        windll.user32.SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_SHOWWINDOW)
    .....