更改JavaFX虚拟键盘的显示

Question

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在当前的系统配置中，有没有办法在我的触摸监视器上显示虚拟键盘？例如，告诉键盘它的所有者应用程序在哪里，以便它在正确的监视器上显示？

Answer 1

了解如何将显示键盘的监视器更改为显示应用程序的监视器。

将更改侦听器附加到TextField的Focusted属性。执行更改侦听器时，检索键盘弹出窗口。然后找到显示应用程序的监视器的活动屏幕边界，并将键盘x坐标移动到此位置。

通过设置autoFix为true，键盘将确保它不（部分）在你的显示器之外，设置autoFix将自动调整y坐标。如果不设置autoFix，还必须手动设置y坐标。

@FXML
private void initialize() {
  textField.focusedProperty().addListener(getKeyboardChangeListener());
}

private ChangeListener getKeyboardChangeListener() {
    return new ChangeListener() {
        @Override
        public void changed(ObservableValue observable, Object oldValue, Object newValue) {
            PopupWindow keyboard = getKeyboardPopup();

            // Make sure the keyboard is shown at the screen where the application is already shown.
            Rectangle2D screenBounds = getActiveScreenBounds();
            keyboard.setX(screenBounds.getMinX());
            keyboard.setAutoFix(true);
        }
    };
}

private PopupWindow getKeyboardPopup() {
    @SuppressWarnings("deprecation")
    final Iterator<Window> windows = Window.impl_getWindows();

    while (windows.hasNext()) {
        final Window window = windows.next();
        if (window instanceof PopupWindow) {
            if (window.getScene() != null && window.getScene().getRoot() != null) {
                Parent root = window.getScene().getRoot();
                if (root.getChildrenUnmodifiable().size() > 0) {
                    Node popup = root.getChildrenUnmodifiable().get(0);
                    if (popup.lookup(".fxvk") != null) {
                        return (PopupWindow)window;
                    }
                }
            }
            return null;
        }
    }
    return null;
}

private Rectangle2D getActiveScreenBounds() {
    Scene scene = usernameField.getScene();
    List<Screen> interScreens = Screen.getScreensForRectangle(scene.getWindow().getX(), scene.getWindow().getY(),
            scene.getWindow().getWidth(), scene.getWindow().getHeight());
    Screen activeScreen = interScreens.get(0);
    return activeScreen.getBounds();
}