Java Code Examples for com.sun.jna.platform.win32.WinDef#HWND

/**
 * Forcibly set focus to the given component
 *
 */
public static void requestForeground(Frame frame)
{
	// SetForegroundWindow can't set iconified windows to foreground, so set the
	// frame state to normal first
	frame.setState(Frame.NORMAL);

	User32 user32 = User32.INSTANCE;

	// Windows does not allow any process to set the foreground window, but it will if
	// the process received the last input event. So we send a F22 key event to the process.
	// https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-setforegroundwindow
	WinUser.INPUT input = new WinUser.INPUT();
	input.type = new WinDef.DWORD(WinUser.INPUT.INPUT_KEYBOARD);
	input.input.ki.wVk = new WinDef.WORD(0x85); // VK_F22
	user32.SendInput(new WinDef.DWORD(1), (WinUser.INPUT[]) input.toArray(1), input.size());

	// Now we may set the foreground window
	WinDef.HWND hwnd = new WinDef.HWND(Native.getComponentPointer(frame));
	user32.SetForegroundWindow(hwnd);
}
 

public static void updateStageStyle(Stage stage) {
    if (Platform.isWindows()) {
        Pointer pointer = getWindowPointer(stage);
        WinDef.HWND hwnd = new WinDef.HWND(pointer);

        final User32 user32 = User32.INSTANCE;
        int oldStyle = user32.GetWindowLong(hwnd, WinUser.GWL_STYLE);
        int newStyle = oldStyle | 0x00020000; // WS_MINIMIZEBOX
        user32.SetWindowLong(hwnd, WinUser.GWL_STYLE, newStyle);
    }
}
 

private static void setTransparent(Component w) {
        WinDef.HWND hwnd = getHWnd(w);
        int wl = User32.INSTANCE.GetWindowLong(hwnd, WinUser.GWL_EXSTYLE);
//        wl = wl | WinUser.WS_EX_LAYERED | WinUser.WS_EX_TRANSPARENT;
        wl = wl | WinUser.WS_EX_LAYERED | WinUser.WS_EX_TRANSPARENT;
        User32.INSTANCE.SetWindowLong(hwnd, WinUser.GWL_EXSTYLE, wl);
    }
 

private long getWindowHandle(Stage stage) {
    long handle = -1;
    try {
    	WinDef.HWND hWnd = User32.INSTANCE.FindWindow(null, WINDOW_TITLE);
    	handle = Pointer.nativeValue(hWnd.getPointer());
    } catch (Throwable e) {
        logger.error("Error getting Window Pointer", e);
    }
    logger.info(String.format("Stage hwnd %d", handle));
    return handle;
}
 

private static WinDef.HWND getHWnd(Component w) {
    WinDef.HWND hwnd = new WinDef.HWND();
    hwnd.setPointer(Native.getComponentPointer(w));
    return hwnd;
}
 

/**
 * Get the window handle from the OS
 */
private static WinDef.HWND getHWnd(Component w) {
    WinDef.HWND hwnd = new WinDef.HWND();
    hwnd.setPointer(Native.getComponentPointer(w));
    return hwnd;
}
 

public Optional<WinDef.HWND> getForegroundWindow() {
    return Optional.ofNullable(user32.GetForegroundWindow());
}
 

public void setForegroundWindow(final WinDef.HWND window) {
    user32.SetForegroundWindow(window);
}
 

public void closeWindow(final WinDef.HWND window) {
    user32.SendMessage(window, WinUser.WM_CLOSE, null, null);
}
 

@Override
public void focus(WinDef.HWND mainWindowHandle) {
}
 

int GetWindowTextA(WinDef.HWND hWnd, byte[] lpString, int nMaxCount); 

int GetClassNameA(WinDef.HWND hwnd, byte[] lpString,int nMaxCount); 

HDEVINFO SetupDiGetClassDevs(GUID Guid, String Enumerator, WinDef.HWND Parent, int Flags);