JavaFX 最小化未装饰的阶段

我有一个未装饰的JavaFX Stage，以及我自己的最小化，最大化和关闭按钮。但不幸的是，与装饰行为相比，单击Windows 7中的任务栏图标不会自动最小化舞台。

有没有办法通过单击任务栏图标来最小化纯Java代码的未装饰阶段？如果不是，我怎么能用JNA做到这一点？

编辑：好吧，我一直在尝试用JNA解决这个问题，但是几乎没有做过C / C++ / JNA，我有点麻烦。如果有人帮我把这些碎片放在一起，我将不胜感激。

这是我到目前为止的代码：

public final class Utils {

   static {
    if (PlatformUtil.isWin7OrLater()) {
            Native.register("shell32");
            Native.register("user32");
        }
    }

    // Apparently, this is the event I am after
    public static final int WM_ACTIVATEAPP = 0x1C;


    public static void registerMinimizeHandler(Stage stage) {
       // Hacky way to get a pointer to JavaFX Window
       Pointer pointer = getWindowPointer(stage);

       WinDef.HWND hwnd = new WinDef.HWND(pointer);

       // Here's my minimize/activate handler
       WinUser.WindowProc windowProc = new MinimizeHandler(stage);

       Pointer magicPointer = ... set this to point to windowProc?

       // This.. apparently, re-sets the WndProc? But how do I get the "magicPointer" that is "attached" to the windowProc?
       User32.INSTANCE.SetWindowLong(hwnd, User32.GWL_WNDPROC, magicPointer);
    }
}

 private static class MinimizeHandler implements WinUser.WindowProc {

    private Stage stage;

    private MinimizeHandler(Stage stage) {
        this.stage = stage;
    }

    @Override
    public WinDef.LRESULT callback(WinDef.HWND hWnd, int uMsg, WinDef.WPARAM wParam, WinDef.LPARAM lParam) {
        if (uMsg == WM_ACTIVATEAPP) {
            System.out.println("ACTIVATE");
        }
        return User32.INSTANCE.DefWindowProc(hWnd, uMsg, wParam, lParam);
    }
}

private static Pointer getWindowPointer(Stage stage) {
    try {
        TKStage tkStage = stage.impl_getPeer();
        Method getPlatformWindow = tkStage.getClass().getDeclaredMethod("getPlatformWindow" );
        getPlatformWindow.setAccessible(true);
        Object platformWindow = getPlatformWindow.invoke(tkStage);
        Method getNativeHandle = platformWindow.getClass().getMethod( "getNativeHandle" );
        getNativeHandle.setAccessible(true);
        Object nativeHandle = getNativeHandle.invoke(platformWindow);
        return new Pointer((Long) nativeHandle);
    } catch (Throwable e) {
        System.err.println("Error getting Window Pointer");
        return null;
    }
}

编辑2：我最终进一步了解了这一点，但是一旦我重新设置了WNDPROC，我的未装饰窗口就没有任何反应。我为一个具有工作解决方案的独立示例提供了100个声誉的赏金。Windows（7 +）只能是OK的，我甚至不知道这在其他平台上的表现如何。

编辑3：好吧，我有点放弃了这个。我正确设置了所有内容，并接收了事件，但是在找出要侦听的正确事件时遇到问题。

由于人们对这个问题有一些兴趣，如果有人想尝试继续这样做，这是我的最终代码（希望它应该开箱即用地“工作”）：

public final class Utils {

    static interface ExtUser32 extends StdCallLibrary, User32 {
        ExtUser32 INSTANCE = (ExtUser32) Native.loadLibrary(
                        "user32",
                        ExtUser32.class,
                        W32APIOptions.DEFAULT_OPTIONS);

        WinDef.LRESULT CallWindowProcW(
                        Pointer lpWndProc,
                        Pointer hWnd,
                        int msg,
                        WinDef.WPARAM wParam,
                        WinDef.LPARAM lParam);

        int SetWindowLong(HWND hWnd, int nIndex, com.sun.jna.Callback wndProc) throws LastErrorException;
    }

    // Some possible event types
    public static final int WM_ACTIVATE = 0x0006;
    public static final int WM_ACTIVATEAPP = 0x1C;
    public static final int WM_NCACTIVATE = 0x0086;

    public static void registerMinimizeHandler(Stage stage) {
        Pointer pointer = getWindowPointer(stage);
        WinDef.HWND hwnd = new WinDef.HWND(pointer);
        long old = ExtUser32.INSTANCE.GetWindowLong(hwnd, User32.GWL_WNDPROC);
        MinimizeHandler handler = new MinimizeHandler(stage, old);
        ExtUser32.INSTANCE.SetWindowLong(hwnd, User32.GWL_WNDPROC, handler);
    }

    private static Pointer getWindowPointer(Stage stage) {
    try {
        TKStage tkStage = stage.impl_getPeer();
        Method getPlatformWindow = tkStage.getClass().getDeclaredMethod("getPlatformWindow" );
        getPlatformWindow.setAccessible(true);
        Object platformWindow = getPlatformWindow.invoke(tkStage);
        Method getNativeHandle = platformWindow.getClass().getMethod( "getNativeHandle" );
        getNativeHandle.setAccessible(true);
        Object nativeHandle = getNativeHandle.invoke(platformWindow);
        return new Pointer((Long) nativeHandle);
    } catch (Throwable e) {
        System.err.println("Error getting Window Pointer");
        return null;
    }
}

    private static class MinimizeHandler implements WinUser.WindowProc, StdCallLibrary.StdCallCallback {

        private Pointer mPrevWndProc32;

        private Stage stage;

        private MinimizeHandler(Stage stage, long oldPtr) {
            this.stage = stage;

            mPrevWndProc32 = new Pointer(oldPtr);

            // Set up an event pump to deliver messages for JavaFX to handle
            Thread thread = new Thread() {
                @Override
                public void run() {
                    int result;
                    WinUser.MSG msg = new WinUser.MSG();
                    while ((result = User32.INSTANCE.GetMessage(msg, null, 0, 0)) != 0) {
                        if (result == -1) {
                            System.err.println("error in get message");
                            break;
                        }
                        else {
                            System.out.println("got message: " + result);
                            User32.INSTANCE.TranslateMessage(msg);
                            User32.INSTANCE.DispatchMessage(msg);
                        }
                    }
                }
            };
            thread.start();
        }

        @Override
        public WinDef.LRESULT callback(WinDef.HWND hWnd, int uMsg, WinDef.WPARAM wParam, WinDef.LPARAM lParam) {

            if (uMsg == WM_ACTIVATEAPP) {
                // Window deactivated (wParam == 0)... Here's where I got stuck and gave up,
                // this is probably not the best event to listen to.. the app
                // does indeed get iconified now by pressing the task-bar button, but it
                // instantly restores afterwards..
                if (wParam.intValue() == 0) {
                    stage.setIconified(true);
                }
                return new WinDef.LRESULT(0);
            }

            // Let JavaFX handle other events
            return ExtUser32.INSTANCE.CallWindowProcW(
                            mPrevWndProc32,
                            hWnd.getPointer(),
                            uMsg,
                            wParam,
                            lParam);
        }
    }
}