com.sun.jna.platform.win32.WinUser Java Examples

public void pressKeys(final List<KeyboardKey> keys) {
    if (keys.isEmpty()) {
        return;
    }

    final WinUser.INPUT input = new WinUser.INPUT();
    final WinUser.INPUT[] inputs = (WinUser.INPUT[]) input.toArray(keys.size() * 2);

    final ListIterator<KeyboardKey> iterator = keys.listIterator();
    int index = 0;
    while (iterator.hasNext()) {
        setKeyDown(inputs[index], iterator.next());
        index++;
    }
    while (iterator.hasPrevious()) {
        setKeyUp(inputs[index], iterator.previous());
        index++;
    }

    user32.SendInput(new WinDef.DWORD(inputs.length), inputs, inputs[0].size());
}
 

private void doKeyRelease(int keyCode) {
  logRobot(stdAutoDelay, "KeyRelease: WaitForIdle: %s - Delay: %d");
  setAutoDelay(stdAutoDelay);
  // on Windows we detect the current layout in KeyboardLayout.
  // Since this layout is not compatible to AWT Robot, we have to use
  // the User32 API to simulate the key release
  if (Settings.AutoDetectKeyboardLayout && Settings.isWindows()) {
    int scanCode =  SXUser32.INSTANCE.MapVirtualKeyW(keyCode, 0);
    SXUser32.INSTANCE.keybd_event((byte)keyCode, (byte)scanCode, new WinDef.DWORD(WinUser.KEYBDINPUT.KEYEVENTF_KEYUP), new BaseTSD.ULONG_PTR(0));
  }else{
    keyRelease(keyCode);
  }

  if (stdAutoDelay == 0) {
    delay(stdDelay);
  }
  logRobot("KeyRelease: extended delay: %d", stdMaxElapsed);
}
 

/**
 * 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 main(String[] args) {
    final User32 user32 = User32.INSTANCE;
    user32.EnumWindows(new WinUser.WNDENUMPROC() {
        int count = 0;
        @Override
        public boolean callback(WinDef.HWND hwnd, Pointer pointer) {
            byte[] windowText = new byte[512];
            byte[] className = new byte[512];
            user32.GetWindowTextA(hwnd, windowText, 512);
            user32.GetClassNameA(hwnd, className, 512);
            String title = Native.toString(windowText);
            String classN = Native.toString(className);

            // get rid of this if block if you want all windows regardless of whether
            // or not they have text
            if (title.isEmpty()) {
                return true;
            }

            System.out.println("Title: " + title + " Class name: " + classN);
            return true;
        }
    },null);
}
 

private void setTransparent(Component w) {
    this.componentHwnd = getHWnd(w);
    this.settingWl = User32.INSTANCE.GetWindowLong(componentHwnd, WinUser.GWL_EXSTYLE);
    int transparentWl = User32.INSTANCE.GetWindowLong(componentHwnd, WinUser.GWL_EXSTYLE) |
            WinUser.WS_EX_LAYERED |
            WinUser.WS_EX_TRANSPARENT;
    User32.INSTANCE.SetWindowLong(componentHwnd, WinUser.GWL_EXSTYLE, transparentWl);
}
 

public void setDisplaySleep(final boolean sleep) {
    user32.DefWindowProc(
        getForegroundWindow().get(),
        WinUser.WM_SYSCOMMAND,
        new WinDef.WPARAM(SC_MONITORPOWER),
        new WinDef.LPARAM(sleep ? 2 : -1)
    );
}
 

public void run(final String command, final String parameters, final String workingDirectory)
        throws SystemException {
    final WinDef.INT_PTR result = shell32.ShellExecute(
        null,
        "open",
        Objects.requireNonNull(command),
        Objects.requireNonNull(parameters),
        workingDirectory,
        WinUser.SW_SHOWNORMAL
    );
    if (result.intValue() <= 32) {
        throw new SystemException("Could not run command: " + command + " " + parameters);
    }
}
 

/**
 * Enter a text by sending input events through the Windows API via JNA.
 *
 * @param text text to send through the Windows API
 * @throws WindowsException if the User32 library is not available or no events were processed
 * @see <a href="https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-sendinput">SendInput function</a>
 * @see <a href="https://stackoverflow.com/a/22308727">Using SendInput to send unicode characters beyond U+FFFF</a>
 */
private static void sendTextViaUser32(String text) throws WindowsException {
    if (StringUtils.isEmpty(text))
        return;
    if (USER32 == null)
        throw new WindowsException("User32 library was not loaded.");

    //final List<Long> pointers = new ArrayList<>();
    //noinspection EmptyFinallyBlock
    try {
        final List<WinUser.INPUT> events = new ArrayList<>();
        for (int i = 0; i < text.length(); i++) {
            final char c = text.charAt(i);
            //LOGGER.debug("printing " + c);
            events.add(createKeyboardInput(c, WinUser.KEYBDINPUT.KEYEVENTF_UNICODE));
            events.add(createKeyboardInput(c, WinUser.KEYBDINPUT.KEYEVENTF_KEYUP | WinUser.KEYBDINPUT.KEYEVENTF_UNICODE));
        }
        //for (WinUser.INPUT i : events) {
        //    long address = Pointer.nativeValue(i.getPointer());
        //    if (!pointers.contains(address)) pointers.add(address);
        //}

        WinUser.INPUT[] inputs = events.toArray(new WinUser.INPUT[0]);
        inputs = (WinUser.INPUT[]) inputs[0].toArray(inputs);
        //for (WinUser.INPUT i : inputs) {
        //    long address = Pointer.nativeValue(i.getPointer());
        //    if (!pointers.contains(address)) pointers.add(address);
        //}

        final WinDef.DWORD result = USER32.SendInput(
                new WinDef.DWORD(inputs.length), inputs, inputs[0].size());

        if (result.intValue() < 1) {
            LOGGER.error("last error: {}", Kernel32Util.getLastErrorMessage());
            throw new WindowsException("No events were executed.");
        }
        //LOGGER.debug("result: {}", result.intValue());
    } finally {
        //for (Long address : pointers) {
        //    Kernel32Util.freeLocalMemory(new Pointer(address));
        //}
    }
}
 

/**
 * Create keyboard input event.
 *
 * @param character character to print
 * @param flags     flags
 * @return keyboard input event
 */
private static WinUser.INPUT createKeyboardInput(char character, long flags) {
    WinUser.INPUT input = new WinUser.INPUT();
    input.type = new WinDef.DWORD(WinUser.INPUT.INPUT_KEYBOARD);
    input.input.setType("ki");
    input.input.ki = new WinUser.KEYBDINPUT();
    input.input.ki.wVk = new WinDef.WORD(0);
    input.input.ki.wScan = new WinDef.WORD(character);
    input.input.ki.time = new WinDef.DWORD(0);
    input.input.ki.dwFlags = new WinDef.DWORD(flags);
    input.input.ki.dwExtraInfo = new BaseTSD.ULONG_PTR();
    return input;
}
 

public void open(final String uri) throws SystemException {
    final WinDef.INT_PTR result = shell32.ShellExecute(
        null,
        "open",
        Objects.requireNonNull(uri),
        null,
        null,
        WinUser.SW_SHOWNORMAL
    );
    if (result.intValue() <= 32) {
        throw new SystemException("Cannot open URI: " + uri);
    }
}
 

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);
    }
 

public void focus(HWND mainWindowHandle) {
    if (PlatformSpecific.isOnWindows()) {
        // Restores browser window if it is minimized / maximized
        user32.ShowWindow(browserWindowHandle, WinUser.SW_SHOWNOACTIVATE);
        // SWP_NOMOVE and SWP_NOSIZE prevents the 0,0,0,0 parameters from taking effect.
        logger.info("Bringing bView to front");
        boolean success = user32.SetWindowPos(browserWindowHandle, mainWindowHandle, 0, 0, 0, 0,
                                              SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);
        if (!success) {
            logger.info("Failed to bring bView to front.");
            logger.info(Kernel32.INSTANCE.GetLastError());
        }
        user32.SetForegroundWindow(mainWindowHandle);
    }
}
 

/**
 * <p><b>Compatible only with windows!</b></p>
 */
protected void fetchEventWithUser32() {
    final User32 lib = User32.INSTANCE;
    final WinUser.MSG msg = new WinUser.MSG();
    final boolean hasMessage = lib.PeekMessage(msg, null, 0, 0, 1);
    if (hasMessage) {
        lib.TranslateMessage(msg);
        lib.DispatchMessage(msg);
    }
}
 

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);
    }
}
 

public static List<WindowInfo> allWindows() {
  /* Initialize the empty window list. */
  final List<WindowInfo> windows = new ArrayList<>();

  /* Enumerate all of the windows and add all of the one for the
   * given process id to our list. */
  boolean result = user32.EnumWindows(
      new WinUser.WNDENUMPROC() {
        public boolean callback(
            final HWND hwnd, final Pointer data) {

          if (user32.IsWindowVisible(hwnd)) {
            IntByReference windowPid = new IntByReference();
            user32.GetWindowThreadProcessId(hwnd, windowPid);

            String windowTitle = getWindowTitle(hwnd);

            windows.add(new WindowInfo(hwnd, windowPid.getValue(), windowTitle));
          }

          return true;
        }
      },
      null);

  /* Handle errors. */
  if (!result && Kernel32.INSTANCE.GetLastError() != 0) {
    throw new RuntimeException("Couldn't enumerate windows.");
  }

  /* Return the window list. */
  return windows;
}
 

private int switchAppWindow(WindowInfo window) {
  HWND hwnd = window.getHwnd();

  WinUser.WINDOWPLACEMENT lpwndpl = new WinUser.WINDOWPLACEMENT();

  user32.GetWindowPlacement(hwnd, lpwndpl);

  if (lpwndpl.showCmd == WinUser.SW_SHOWMINIMIZED || lpwndpl.showCmd == WinUser.SW_MINIMIZE) {
    user32.ShowWindow(hwnd, WinUser.SW_RESTORE);
  }

  boolean success = user32.SetForegroundWindow(hwnd);

  if (success) {
    user32.SetFocus(hwnd);
    IntByReference windowPid = new IntByReference();
    user32.GetWindowThreadProcessId(hwnd, windowPid);

    return windowPid.getValue();
  } else {
    return 0;
  }
}
 

@Test
@EnabledOnOs(OS.WINDOWS)
@Disabled("Only run manually")
void cameraConnectedIsSeenWithUser32() throws InterruptedException {
    // This test demonstrate how to get events from library using User32 but better to use EdsGetEvent of library
    final User32 lib = User32.INSTANCE;

    final AtomicBoolean cameraEventCalled = new AtomicBoolean(false);

    TestShortcutUtil.registerCameraAddedHandler(inContext -> {
        log.warn("Camera added called {}", inContext);
        cameraEventCalled.set(true);
        return new NativeLong(0);
    });

    final WinUser.MSG msg = new WinUser.MSG();

    for (int i = 0; i < 100; i++) {
        Thread.sleep(50);
        final boolean hasMessage = lib.PeekMessage(msg, null, 0, 0, 1);
        if (hasMessage) {
            log.warn("Had message");
            lib.TranslateMessage(msg);
            lib.DispatchMessage(msg);
        }
    }

    Assertions.assertTrue(cameraEventCalled.get());
}
 

public void minimizeWindow() {
    if (PlatformSpecific.isOnWindows()) {
        user32.ShowWindow(browserWindowHandle, WinUser.SW_MINIMIZE);
    }
}
 

private void setKeyUp(final WinUser.INPUT input, final KeyboardKey key) {
    input.type.setValue(WinUser.INPUT.INPUT_KEYBOARD);
    input.input.setType(WinUser.KEYBDINPUT.class);
    input.input.ki.dwFlags.setValue(WinUser.KEYBDINPUT.KEYEVENTF_KEYUP);
    input.input.ki.wVk = key.getVirtualKeyCode();
}
 

private void bringToTop() {
    if (PlatformSpecific.isOnWindows()) {
        user32.ShowWindow(browserWindowHandle, WinUser.SW_RESTORE);
        user32.SetForegroundWindow(browserWindowHandle);
    }
}
 

private void setKeyDown(final WinUser.INPUT input, final KeyboardKey key) {
    input.type.setValue(WinUser.INPUT.INPUT_KEYBOARD);
    input.input.setType(WinUser.KEYBDINPUT.class);
    input.input.ki.wVk = key.getVirtualKeyCode();
}
 

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

public void enableSettings() {
    User32.INSTANCE.SetWindowLong(componentHwnd, WinUser.GWL_EXSTYLE, settingWl);
}
 

public KeyHookThread(KeyEventReceiver eventReceiver) {
	super(eventReceiver, WinUser.WH_KEYBOARD_LL);
}
 

public MouseHookThread(MouseEventReceiver eventReceiver) {
	super(eventReceiver, WinUser.WH_MOUSE_LL);
}
 

boolean EnumWindows(WinUser.WNDENUMPROC lpEnumFunc, Pointer arg);