com.sun.jna.platform.win32.User32 Java Examples

/**
 * Manually focus the PowerPoint Viewer window. Shift focus to PowerPoint
 * Viewer to move that window to the top or resume playback.
 */
private static String focusPPTView() {
    // Set focus to PowerPoint Viewer
    HWND hwnd = User32.INSTANCE.FindWindow(null,
            title); // window title
    String ret = "";
    if (hwnd == null) {
        ret = "PowerPoint Viewer is not running";
        LOGGER.log(Level.INFO, ret);

    } else {
        User32.INSTANCE.ShowWindow(hwnd, 9); // SW_RESTORE
        User32.INSTANCE.SetForegroundWindow(hwnd); // bring to front
        ret = "Successfully focued PPTView";
    }
    return ret;
}
 

public static BufferedImage extractExeIcon(String fullExeFile, int index, boolean large) {
    PointerByReference iconsLargeRef = new PointerByReference();
    PointerByReference iconsSmallRef = new PointerByReference();
    int cnt = Shell32.INSTANCE.ExtractIconEx(fullExeFile, index, iconsLargeRef, iconsSmallRef, new WinDef.UINT(1)).intValue();
    if (cnt == 0) {
        return null;
    }
    Pointer iconsLarge = iconsLargeRef.getPointer();
    Pointer iconsSmall = iconsSmallRef.getPointer();

    WinDef.HICON icon;
    if (large) {
        icon = new WinDef.HICON(iconsLarge.getPointer(0));
    } else {
        icon = new WinDef.HICON(iconsSmall.getPointer(0));
    }

    BufferedImage ic = iconToImage(icon);

    User32.INSTANCE.DestroyIcon(icon);
    return ic;
}
 

private void gameToFront() {
    User32.INSTANCE.EnumWindows((hWnd, arg1) -> {
        char[] className = new char[512];
        User32.INSTANCE.GetClassName(hWnd, className, 512);
        String wText = Native.toString(className);

        if (wText.isEmpty()) {
            return true;
        }
        if (wText.equals("POEWindowClass")) {
            User32.INSTANCE.SetForegroundWindow(hWnd);
            return false;
        }
        return true;
    }, null);
}
 

private void updateState() {
  if (!myFailureDetected) {
    try {
      // This might not work in all cases, but hopefully is a more reliable method than the current one (checking for font smoothing)
      // see https://msdn.microsoft.com/en-us/library/aa380798%28v=vs.85%29.aspx
      boolean newValue = User32.INSTANCE.GetSystemMetrics(0x1000) != 0; // 0x1000 is SM_REMOTESESSION
      LOG.debug("Detected remote desktop: ", newValue);
      if (newValue != myRemoteDesktopConnected) {
        myRemoteDesktopConnected = newValue;
        if (myRemoteDesktopConnected) {
          // We postpone notification to avoid recursive initialization of RemoteDesktopDetector
          // (in case it's initialized by request from com.intellij.notification.EventLog)
          ApplicationManager.getApplication().invokeLater(() -> Notifications.Bus.notify(
                  NOTIFICATION_GROUP
                          .createNotification(ApplicationBundle.message("remote.desktop.detected.message"), NotificationType.INFORMATION)
                          .setTitle(ApplicationBundle.message("remote.desktop.detected.title"))));
        }
      }
    }
    catch (Throwable e) {
      myRemoteDesktopConnected = false;
      myFailureDetected = true;
      LOG.warn("Error while calling GetSystemMetrics", e);
    }
  }
}
 

@Override
public LRESULT callback(int nCode, WPARAM wParam, MOUSEHOOKSTRUCT info) {
	boolean cancel = false;
	int code = wParam.intValue();
	if (code == WM_MOUSEMOVE) {
		cancel = onMouseMove(info.hwnd, info.pt);
	} else if (code == WM_MOUSESCROLL) {
		boolean down = Pointer.nativeValue(info.hwnd.getPointer()) == 4287102976L;
		cancel = onMouseScroll(down, info.hwnd, info.pt);
	} else if (code == WM_MOUSELDOWN || code == WM_MOUSERDOWN || code == WM_MOUSEMDOWN) {
		onMousePress(MouseButtonType.fromWParam(code), info.hwnd, info.pt);
	} else if (code == WM_MOUSELUP || code == WM_MOUSERUP || code == WM_MOUSEMUP) {
		onMouseRelease(MouseButtonType.fromWParam(code), info.hwnd, info.pt);
	}
	if (cancel) {
		return new LRESULT(1);
	}
	Pointer ptr = info.getPointer();
	long peer = Pointer.nativeValue(ptr);
	return User32.INSTANCE.CallNextHookEx(getHookManager().getHhk(this), nCode, wParam, new LPARAM(peer));
}
 

/**
 * 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);
}
 

/**
 * Sends an action (flags) at the given x,y coordinates.
 * 
 * @param x
 * @param y
 * @param flags
 */
public static void mouseAction(int x, int y, int flags) {
	INPUT input = new INPUT();

	input.type = new DWORD(INPUT.INPUT_MOUSE);
	input.input.setType("mi");
	if (x != -1) {
		input.input.mi.dx = new LONG(x);
	}
	if (y != -1) {
		input.input.mi.dy = new LONG(y);
	}
	input.input.mi.time = new DWORD(0);
	input.input.mi.dwExtraInfo = new ULONG_PTR(0);
	input.input.mi.dwFlags = new DWORD(flags);
	User32.INSTANCE.SendInput(new DWORD(1), new INPUT[] { input }, input.size());
}
 

public static boolean switchToWinOs(Predicate<String> condition) {
    final AtomicBoolean found = new AtomicBoolean();
    User32.INSTANCE.EnumWindows((HWND hwnd, com.sun.jna.Pointer p) -> {
        char[] windowText = new char[512];
        User32.INSTANCE.GetWindowText(hwnd, windowText, 512);
        String windowName = Native.toString(windowText);
        logger.debug("scanning window: {}", windowName);
        if (condition.test(windowName)) {
            found.set(true);
            focusWinOs(hwnd);
            return false;
        }
        return true;
    }, null);
    return found.get();
}
 

/**
 * Load user32 library.
 *
 * @return JNA interface of the user32 library
 */
private static User32 loadUser32() {
    try {
        //LOGGER.debug("Load user32 library.");
        return Native.load(User32.class);
        //return Native.load(User32.class, W32APIOptions.DEFAULT_OPTIONS);
        //return Native.load(User32.class, W32APIOptions.UNICODE_OPTIONS);
    } catch (UnsatisfiedLinkError ex) {
        LOGGER.warn("Can't load user32 library.", ex);
        return null;
    }
}
 

public static void main(String[] args) throws Exception {
    HOOKPROC hookProc = new HOOKPROC_bg();
    HINSTANCE hInst = Kernel32.INSTANCE.GetModuleHandle(null);

    User32.HHOOK hHook = User32.INSTANCE.SetWindowsHookEx(User32.WH_KEYBOARD_LL, hookProc, hInst, 0);
    if (hHook == null)
        return;
    User32.MSG msg = new User32.MSG();
    System.err.println("Please press any key ....");
    while (true) {
        User32.INSTANCE.GetMessage(msg, null, 0, 0);
    }
}
 

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 String getGamePath() {
    return WindowUtils.getAllWindows(false).stream().filter(window -> {
        char[] className = new char[512];
        User32.INSTANCE.GetClassName(window.getHWND(), className, 512);
        return Native.toString(className).equals("POEWindowClass");
    }).map(it -> {
        String filePath = it.getFilePath();
        return StringUtils.substringBeforeLast(filePath, "\\");
    }).findAny().orElse(null);
}
 

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 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);
}
 

private void activateFrame(@Nullable Project openedProject, @Nonnull UnityOpenFilePostHandlerRequest body)
{
	if(openedProject == null)
	{
		return;
	}

	IdeFrame ideFrame = WindowManager.getInstance().getIdeFrame(openedProject);
	if(ideFrame == null || !ideFrame.getWindow().isVisible())
	{
		return;
	}

	if(SystemInfo.isMac)
	{
		RequestFocusHttpRequestHandler.activateFrame(ideFrame);
		ID id = MacUtil.findWindowFromJavaWindow(TargetAWT.to(ideFrame.getWindow()));
		if(id != null)
		{
			Foundation.invoke(id, "makeKeyAndOrderFront:", ID.NIL);
		}
	}
	else if(SystemInfo.isWindows)
	{
		Pointer windowPointer = Native.getWindowPointer(TargetAWT.to(ideFrame.getWindow()));
		User32.INSTANCE.SetForegroundWindow(new WinDef.HWND(windowPointer));
	}
	else
	{
		RequestFocusHttpRequestHandler.activateFrame(ideFrame);
	}
}
 

@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());
}
 

/**
 * Sends a key-up input for the given character value c.
 * 
 * @param c
 */
public static void sendKeyUp(int c) {
	INPUT input = new INPUT();
	input.type = new DWORD(INPUT.INPUT_KEYBOARD);
	input.input.setType("ki");
	input.input.ki.wScan = new WORD(0);
	input.input.ki.time = new DWORD(0);
	input.input.ki.dwExtraInfo = new ULONG_PTR(0);
	input.input.ki.wVk = new WORD(c);
	input.input.ki.dwFlags = new DWORD(KEYEVENTF_KEYUP);
	User32.INSTANCE.SendInput(new DWORD(1), (INPUT[]) input.toArray(1), input.size());
}
 

/**
 * Sends a key-down input for the given character value c.
 * 
 * @param c
 */
public static void sendKeyDown(int c) {
	INPUT input = new INPUT();
	input.type = new DWORD(INPUT.INPUT_KEYBOARD);
	input.input.setType("ki");
	input.input.ki.wScan = new WORD(0);
	input.input.ki.time = new DWORD(0);
	input.input.ki.dwExtraInfo = new ULONG_PTR(0);
	input.input.ki.wVk = new WORD(c);
	input.input.ki.dwFlags = new DWORD(KEYEVENTF_KEYDOWN);
	User32.INSTANCE.SendInput(new DWORD(1), (INPUT[]) input.toArray(1), input.size());
}
 

/**
 * Sends a key-down input followed by a key-up input for the given character
 * value c.
 * 
 * @param c
 */
public static void pressKey(int c) {
	INPUT input = new INPUT();
	input.type = new DWORD(INPUT.INPUT_KEYBOARD);
	input.input.setType("ki");
	input.input.ki.wScan = new WORD(0);
	input.input.ki.time = new DWORD(0);
	input.input.ki.dwExtraInfo = new ULONG_PTR(0);
	input.input.ki.wVk = new WORD(c);
	input.input.ki.dwFlags = new DWORD(KEYEVENTF_KEYDOWN);
	User32.INSTANCE.SendInput(new DWORD(1), (INPUT[]) input.toArray(1), input.size());
	input.input.ki.wVk = new WORD(c);
	input.input.ki.dwFlags = new DWORD(KEYEVENTF_KEYUP);
	User32.INSTANCE.SendInput(new DWORD(1), (INPUT[]) input.toArray(1), input.size());
}
 

/**
 * <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);
    }
}
 

@Override
public Rectangle getFocusedWindow() {
  HWND hwnd = user32.GetForegroundWindow();
  RECT rect = new User32.RECT();
  boolean success = user32.GetWindowRect(hwnd, rect);
  return success ? rect.toRectangle() : null;
  //return getFocusedRectangle();
}
 

/**
 * Returns a map of process HWND's to their window titles.
 * 
 * @return
 */
public static Map<HWND, String> getWindows() {
	Map<HWND, String> map = new HashMap<HWND, String>();
	User32.INSTANCE.EnumWindows(new WNDENUMPROC() {
		@Override
		public boolean callback(HWND hWnd, Pointer arg1) {
			String wText = getWindowTitle(hWnd);
			map.put(hWnd, wText);
			return true;
		}
	}, null);
	return map;
}
 

@Override
public LRESULT callback(int nCode, WPARAM wParam, KBDLLHOOKSTRUCT info) {
	int code = wParam.intValue();
	boolean cancel = onKeyUpdate(SystemState.from(code), PressState.from(code), info.time, info.vkCode);
	if (cancel) {
		return new LRESULT(1);
	}
	Pointer ptr = info.getPointer();
	long peer = Pointer.nativeValue(ptr);
	return User32.INSTANCE.CallNextHookEx(getHookManager().getHhk(this), nCode, wParam, new LPARAM(peer));
}
 

public static boolean switchToWinOs(String title) {
    HWND hwnd = User32.INSTANCE.FindWindow(null, title);
    if (hwnd == null) {
        return false;
    } else {
        focusWinOs(hwnd);
        return true;
    }
}
 

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);
    }
}
 

@Override
public void run() {
	WinDef.HMODULE handle = Kernel32.INSTANCE.GetModuleHandle(null);
	this.hhk = User32.INSTANCE.SetWindowsHookEx(hookType, eventReceiver, handle, 0);
	int result;
	while ((result = getMessage()) != 0) {
		if (result == -1) {
			onFail();
			break;
		} else {
			dispatchEvent();
		}
	}
	unhook();
}
 

/**
 * @param hWnd
 * @return Title of a given process HWND.
 */
public static String getWindowTitle(HWND hWnd) {
	char[] buffer = new char[MAX_TITLE_LENGTH * 2];
	User32.INSTANCE.GetWindowText(hWnd, buffer, MAX_TITLE_LENGTH);
	return Native.toString(buffer);
}
 

public static boolean drawIcon(BufferedImage ret, WinDef.HICON hIcon, int diFlags) {

        WinDef.HDC hdcScreen = User32.INSTANCE.GetDC(null);
        WinDef.HDC hdcMem = Gdi32.INSTANCE.CreateCompatibleDC(hdcScreen);

        WinDef.HBITMAP bitmap = Gdi32.INSTANCE.CreateCompatibleBitmap(hdcScreen, ret.getWidth(), ret.getHeight());

        WinNT.HANDLE hbmOld = Gdi32.INSTANCE.SelectObject(hdcMem, bitmap);

        WinNT.HANDLE hBrush = Gdi32.INSTANCE.CreateSolidBrush(new WinDef.DWORD(0xffffff));
        WinDef.RECT rect = new WinDef.RECT();
        rect.left = 0;
        rect.top = 0;
        rect.right = ret.getWidth();
        rect.bottom = ret.getHeight();
        User32.INSTANCE.FillRect(hdcMem, rect, hBrush);
        Gdi32.INSTANCE.DeleteObject(hBrush);

        boolean ok = User32.INSTANCE.DrawIconEx(hdcMem, 0, 0, hIcon, ret.getWidth(), ret.getHeight(), new WinDef.UINT(0), new WinDef.HBRUSH(Pointer.NULL), diFlags);

        if (!ok) {
            return false;
        }

        for (int x = 0; x < ret.getWidth(); x++) {
            for (int y = 0; y < ret.getHeight(); y++) {
                int rgb = Gdi32.INSTANCE.GetPixel(hdcMem, x, y).intValue();
                int r = (rgb >> 16) & 0xff;
                int g = (rgb >> 8) & 0xff;
                int b = (rgb) & 0xff;
                rgb = (b << 16) + (g << 8) + r;
                ret.setRGB(x, y, rgb);
            }
        }

        Gdi32.INSTANCE.SelectObject(hdcMem, hbmOld);
        Gdi32.INSTANCE.DeleteObject(bitmap);
        Gdi32.INSTANCE.DeleteDC(hdcMem);
        User32.INSTANCE.ReleaseDC(null, hdcScreen);
        return true;
    }
 

private static Rectangle getRectangle(HWND hwnd, int winNum) {
  RECT rect = new User32.RECT();
  boolean success = user32.GetWindowRect(hwnd, rect);
  return success ? rect.toRectangle() : null;
}
 

private static void getMainWindowHandle(String windowTitle) {
    if (PlatformSpecific.isOnWindows()) {
        mainWindowHandle = User32.INSTANCE.FindWindow(null, windowTitle);
    }
}