Examples of com.sun.jna.examples.win32.User32

com.sun.jna.platform.win32.User32
Provides access to the w32 user32 library. Incomplete implementation to support demos. @author Todd Fast, todd.fast@sun.com @author twall@users.sf.net

            update(true, true);
        }
    }


    private HWND getHwnd(Window w) {
        HWND hwnd = new HWND();
        hwnd.setPointer(Native.getWindowPointer(w));
        return hwnd;
    }

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    }
    
    private void updateW32(boolean a, boolean i) {
        User32 user = User32.INSTANCE;
        GDI32 gdi = GDI32.INSTANCE;
        HWND hWnd = null;


        if (!alphaWindow.isDisplayable()) {
            alphaWindow.pack();
            hWnd = getHwnd(alphaWindow);
            int flags = user.GetWindowLong(hWnd, User32.GWL_EXSTYLE);

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        return Holder.INSTANCE;
    }


    private static class W32WindowUtils extends NativeWindowUtils {
        private HWND getHWnd(Component w) {
            HWND hwnd = new HWND();
            hwnd.setPointer(Native.getComponentPointer(w));
            return hwnd;
        }

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            if (!isWindowAlphaSupported()) {
                throw new UnsupportedOperationException("Set sun.java2d.noddraw=true to enable transparent windows");
            }
            whenDisplayable(w, new Runnable() {
                public void run() {
                    HWND hWnd = getHWnd(w);
                    User32 user = User32.INSTANCE;
                    int flags = user.GetWindowLong(hWnd, User32.GWL_EXSTYLE);
                    byte level = (byte)((int)(255 * alpha) & 0xFF);
                    if (usingUpdateLayeredWindow(w)) {
                        // If already using UpdateLayeredWindow, continue to

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            if (transparent == isTransparent)
                return;
            whenDisplayable(w, new Runnable() {
                public void run() {
                    User32 user = User32.INSTANCE;
                    HWND hWnd = getHWnd(w);
                    int flags = user.GetWindowLong(hWnd, User32.GWL_EXSTYLE);
                    JRootPane root = ((RootPaneContainer)w).getRootPane();
                    JLayeredPane lp = root.getLayeredPane();
                    Container content = root.getContentPane();
                    if (content instanceof W32TransparentContentPane) {

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        private void setWindowRegion(final Component w, final HRGN hrgn) {
            whenDisplayable(w, new Runnable() {
                public void run() {
                    GDI32 gdi = GDI32.INSTANCE;
                    User32 user = User32.INSTANCE;
                    HWND hWnd = getHWnd(w);
                    try {
                        user.SetWindowRgn(hWnd, hrgn, true);
                        setForceHeavyweightPopups(getWindow(w), hrgn != null);
                    }
                    finally {

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                    POINT winLoc = new POINT();
                    winLoc.x = win.getX();
                    winLoc.y = win.getY();
                    POINT srcLoc = new POINT();
                    BLENDFUNCTION blend = new BLENDFUNCTION();
                    HWND hWnd = getHWnd(win);
                    // extract current constant alpha setting, if possible
                    ByteByReference bref = new ByteByReference();
                    IntByReference iref = new IntByReference();
                    byte level = getAlpha(win);
                    try {

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            update(true, true);
        }
    }


    private HWND getHwnd(Window w) {
        HWND hwnd = new HWND();
        hwnd.setPointer(Native.getWindowPointer(w));
        return hwnd;
    }

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    }
    
    private void updateW32(boolean a, boolean i) {
        User32 user = User32.INSTANCE;
        GDI32 gdi = GDI32.INSTANCE;
        HWND hWnd = null;


        if (!alphaWindow.isDisplayable()) {
            alphaWindow.pack();
            hWnd = getHwnd(alphaWindow);
            int flags = user.GetWindowLong(hWnd, User32.GWL_EXSTYLE);

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                throw new UnsupportedOperationException("Set sun.java2d.noddraw=true to enable transparent windows");
            }
            whenDisplayable(w, new Runnable() {
                public void run() {
                    HWND hWnd = getHWnd(w);
                    User32 user = User32.INSTANCE;
                    int flags = user.GetWindowLong(hWnd, WinUser.GWL_EXSTYLE);
                    byte level = (byte)((int)(255 * alpha) & 0xFF);
                    if (usingUpdateLayeredWindow(w)) {
                        // If already using UpdateLayeredWindow, continue to
                        // do so
                        BLENDFUNCTION blend = new BLENDFUNCTION();
                        blend.SourceConstantAlpha = level;
                        blend.AlphaFormat = WinUser.AC_SRC_ALPHA;
                        user.UpdateLayeredWindow(hWnd, null, null, null, null,
                                                 null, 0, blend,
                                                 WinUser.ULW_ALPHA);
                    }
                    else if (alpha == 1f) {
                        flags &= ~WinUser.WS_EX_LAYERED;
                        user.SetWindowLong(hWnd, WinUser.GWL_EXSTYLE, flags);
                    }
                    else {
                        flags |= WinUser.WS_EX_LAYERED;
                        user.SetWindowLong(hWnd, WinUser.GWL_EXSTYLE, flags);
                        user.SetLayeredWindowAttributes(hWnd, 0, level,
                            WinUser.LWA_ALPHA);
                    }
                    setForceHeavyweightPopups(w, alpha != 1f);
                    storeAlpha(w, level);
                }

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