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How to block a main window in JavaFX

There is a button in a scene of the main window. When it's clicked, the new window is created, according following code:
public static void create()
{
Stage stage = new Stage();
AnchorPane pane = new AnchorPane();
//Here i add some into pane
stage.setScene(new Scene(pane));
stage.setWidth(500);
stage.setHeight(600);
stage.show();
}
I'd like the main window will remain blocked (i.e. an user won't be able to click on buttons, type text, resize or interact with it with other ways) until the additional window is closed.

Here is a link that shows exactly what you're looking for: http://www.javafxtutorials.com/tutorials/creating-a-pop-up-window-in-javafx/
Here is the main part of the code you need to add:
stage.initModality(Modality.APPLICATION_MODAL);
stage.initOwner(btn1.getScene().getWindow());
stage.showAndWait(); // This forces the program to pay attention ONLY to this popup window until its closed
Hope this helps.

JavaFX New Scene on Button Click

The title may be a bit vague, so allow me to define it a little better. I have a working piece of code (down below): a simple main menu for a game I am working on. Everything works well, except for the Start button.
What I want to be able to do is click the Start button, and have a new scene appear on the same stage (window). I do not want to see a new window open. I have talked with someone more experienced in Java, and they told me to create separate classes for the MenuFX and the GameFX. If that is the case, I would need to call some start or launch method on the GameFX class from the MenuFX class, correct? Is this the best approach, or would I want to keep all FX-related code in one class? Also, I should keep the same stage for all FX work, no?
This post shed some light on things, but I am not well-versed in some of the terms discussed- for instance, I still do not understand the concept of Root.
Also, this post talks about a similar application, but I am not using FXML or SceneBuilder... I do not know if any of it is relatable.
MenuFX.java - I have removed some of the working code, simply for brevity. You can see that all I need help with is tying the Start button to some functionality that makes a new empty scene.
/*
* This is simply working on the title screen.
*/
// Asssume all imports are correct
import java.everythingNeeded
public class MenuFX extends Application {
#Override
public void start (Stage primaryStage) {
// Make the window a set size...
primaryStage.setResizable(false);
// Create menu vbox and set the background image
VBox menuVBox = new VBox(30);
menuVBox.setBackground(new Background(new BackgroundImage(new
Image("image/bambooBG.jpg"), null, null, null, new BackgroundSize(45,
45, true, true, true, true))));
// Create start button
Button startButton = new Button("Start Game");
// TODO Some things...
// Need assistance here
// Create help button
Button helpButton = new Button("Help");
helpButton.setOnAction(e -> THINGS);
// Create music toggle button
ToggleButton musicButton = new ToggleButton("Music On/Off");
musicButton.setOnAction(e -> THINGS);
// Create credits button
Button creditsButton = new Button("Credits");
creditsButton.setOnAction(THINGS);
// Create exit button and set it to close the program when clicked
Button endButton = new Button("Exit Game");
endButton.setOnAction(e -> Platform.exit());
// Add all nodes to the vbox pane and center it all
// Must be in order from top to bottom
menuVBox.getChildren().addAll(startButton, helpButton, musicButton, creditsButton, endButton);
menuVBox.setAlignment(Pos.CENTER);
// New scene, place pane in it
Scene scene = new Scene(menuVBox, 630, 730);
// Place scene in stage
primaryStage.setTitle("-tiles-");
primaryStage.setScene(scene);
primaryStage.show();
}
// Needed to run JavaFX w/o the use of the command line
public static void main(String[] args) {
launch(args);
}
}
Restating: I want to click the Start button and have the currently open window change to an empty scene.
Here is a pastebin of the MenuFX class in its entirety:
http://pastebin.com/n6XbQfhc
Thank you for any help,
Bagger

The basic idea here is you would do something like:
public class GameFX {
private final BorderPane rootPane ; // or any other kind of pane, or Group...
public GameFX() {
rootPane = new BorderPane();
// build UI, register event handlers, etc etc
}
public Pane getRootPane() {
return rootPane ;
}
// other methods you may need to access, etc...
}
Now back in the MenuFX class you would do
Button startButton = new Button("Start Game");
startButton.setOnAction(e -> {
GameFX game = new GameFX();
primaryStage.getScene().setRoot(game.getRootPane());
});

JavaFX: Creating a button resets my stage/scene/panes background color

I'm making a Javafx game with a pane to hold my elements. The background color is set to black (instead of the default white) using the Scene.setFill(); method.
public class backgroundColor extends Application{
#Override
public void start(Stage stage) throws Exception {
Pane background = new Pane();
Scene scene = new Scene(background, 800, 600);
scene.setFill(Color.BLACK);
//Button button = new Button("Just a button");
stage.setScene(scene);
stage.show();
}
}
This works fine and the background is displayed as black... However, when I un-comment the button line, the fill color is suddenly displayed as white. Notice that the button is only initialized, it isn't being used, eclipse even gives me the warning that the data field "button" is unused.
Is this a weakness of Scene.setFill()? Or is this a unintended feature of creating a controller?
I am working on a game where I switch between different displays by changing the scene's "root" property using Scene.setRoot(), and before I created a button the color was fine no matter how many times I set different panes as the scene's new root node. However, after I created the button I discovered that I had to use a significantly more complicated workaround:
background.setBackground(new Background(new BackgroundFill(Color.BLACK, null, null)));
to fix the issue. Is there a better way to fix the background for the scene, or do I really have to set the background manually for all panes?

JavaFX virtual keyboard overlaps nodes

i have a question about using virtual keyboard on touch supported pc with Windows 8.1. I have managed to show the virtual keyboard when textfield is focused with java switch:
-Dcom.sun.javafx.isEmbedded=true -Dcom.sun.javafx.virtualKeyboard=javafx
I found how to that on JavaFX Virtual Keyboard doesn't show1.
But when the keyboard show's up, it overlapps nodes below the keyboard.
According to what I read, http://docs.oracle.com/javase/8/javafx/user-interface-tutorial/embed.htm, it should't be working like that.
Does anyone have any experience with that kind of problem?
When i run the test application it shows in full screen and embedded virtual keyboard is showing, becasue the textfield has focus. The textfield in this case is not visible until i "hide" the keyboard. I am not sure that this is the right approach so i need help please.
java -Dcom.sun.javafx.isEmbedded=true -Dcom.sun.javafx.virtualKeyboard=javafx application.TestVKB
public class TestVKB extends Application{
public static void main(String[] args) {
Application.launch(args);
}
#Override
public void start(Stage stage) throws Exception {
TextField tfComment = new TextField();
tfComment.setPromptText("Enter comment");
BorderPane borderPane = new BorderPane();
borderPane.setBottom(tfComment);
Scene scene = new Scene(borderPane);
stage.setScene(scene);
stage.setMaximized(true);
stage.show();
}
}
After click in field username or password
I would be grateful for any advice. Thanks in advance.

As I've already pointed out in my first answer, the virtual keyboard is embedded in a PopupWindow, created in a different stage, and displayed on top of your current stage.
The option -Dcom.sun.javafx.vk.adjustwindow=true works, moving the main stage so the control is visible and there is no overlapping.
But when this input control is located at the bottom of the main stage, this is moved up to the center of the screen leaving a big empty gap that shows whatever is behind.
This second answer gives a solution to move the main stage just the required distance, without any gap, also taking into account the fade in/out animations of the virtual keyboard.
For starters, in our scene, we add a Button on the center, and the TextField on the bottom. With two controls we can change the focus easily and show/hide the keyboard.
To maximize the stage I'll use getVisualBounds(), so the taskbar can be visible.
private PopupWindow keyboard;
private final Rectangle2D visualBounds = Screen.getPrimary().getVisualBounds();
private final Rectangle2D bounds = Screen.getPrimary().getBounds();
private final double taskbarHeight=bounds.getHeight()-visualBounds.getHeight();
#Override
public void start(Stage stage) {
TextField tfComment = new TextField();
tfComment.setPromptText("Enter comment");
BorderPane borderPane = new BorderPane(new Button("Click"));
borderPane.setBottom(tfComment);
Scene scene = new Scene(borderPane);
stage.setScene(scene);
stage.setX(visualBounds.getMinX());
stage.setY(visualBounds.getMinY());
stage.setWidth(visualBounds.getWidth());
stage.setHeight(visualBounds.getHeight());
stage.show();
}
We need to find the new stage when it's shown. In the same way as Scenic View, we'll use a deprecated method to get a valid window:
private PopupWindow getPopupWindow() {
#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;
}
We'll call this method when the textfield gets the focus:
...
stage.show();
tfComment.focusedProperty().addListener((ob,b,b1)->{
if(keyboard==null){
keyboard=getPopupWindow();
}
});
}
Once we have the window, we can listen to changes in its position and move the main stage accordingly:
....
stage.show();
//findWindowExecutor.execute(new WindowTask());
tfComment.focusedProperty().addListener((ob,b,b1)->{
if(keyboard==null){
keyboard=getPopupWindow();
keyboard.yProperty().addListener(obs->{
System.out.println("wi "+keyboard.getY());
Platform.runLater(()->{
double y = bounds.getHeight()-taskbarHeight-keyboard.getY();
stage.setY(y>0?-y:0);
});
});
}
});
}
Note that instead of moving up the stage, another option will be resizing it (if there is enough space within the controls).
This will be the case where the textfield gets the focus and the virtual keyboard is fully shown:

Basically, the virtual keyboard is embedded in a PopupWindow, created in a different stage, and displayed on top of your current stage, at the bottom of the screen, no matter where the InputControl that triggers the keyboard is located.
You can see that on the FXVKSkin class:
winY.set(screenBounds.getHeight() - VK_HEIGHT);
But, just inmediately after that, you can find this:
if (vkAdjustWindow) {
adjustWindowPosition(attachedNode);
}
So, there's another command line option that you can use to move the stage so the node (the textfield in this case) will be on the center of the screen and you can type without overlapping it:
-Dcom.sun.javafx.vk.adjustwindow=true
Note that when the textfield loses the focus, the keyboard is hidden and the stage is moved again to its original position:
restoreWindowPosition(oldNode);
I've tested this option successfully, but when you have the textfield at the bottom of the screen, this will move your stage bottom to the center of the screen, leaving a big gap between both stages (you'll see whatever you have on the background).
I've managed to add a listener to the new stage and adjust the position just the necessary. If you are interested I could post it.
EDIT
Note this command line option won't work if the stage is maximized. A simple solution for this is:
Rectangle2D bounds = Screen.getPrimary().getBounds();
stage.setX(bounds.getMinX());
stage.setY(bounds.getMinY());
stage.setWidth(bounds.getWidth());
stage.setHeight(bounds.getHeight());
stage.show();

I liked the solution, but in my case I prefer to move the keyboard using the showed method getPopupWindow i created a listener on textfield and changed the position of the keyboard directly.
textField.focusedProperty().addListener((ob, b, b1) -> {
if (keyboard == null) {
keyboard = getPopupWindow();
keyboard.setHideOnEscape(Boolean.TRUE);
keyboard.setAutoHide(Boolean.TRUE);
keyboard.centerOnScreen();
keyboard.requestFocus();
keyboard.sizeToScene();
}
Platform.runLater(() -> {
keyboard.setY(**NEW_POSITION_OF_KEYBOARD**);
});
});

javafx maximized window moves if dialog shows up

If I create a javafx dialog using the following method:
public static void showDialog(Event event) throws IOException {
dialogStage = new Stage();
GridPane grid = (GridPane) Start.createLoader().load(Start.class.getResource("file.fxml").openStream());
dialogStage.setScene(new Scene(grid));
dialogStage.setTitle("Title");
dialogStage.initModality(Modality.WINDOW_MODAL);
dialogStage.initOwner(((Node) event.getSource()).getScene().getWindow());
dialogStage.showAndWait();
}
the ower window moves in case it is maximized. This also happens if I use:
Modality.APPLICATION_MODAL
It works if I combine:
dialogStage.initModality(Modality.WINDOW_MODAL);
dialogStage.initOwner(primaryStage.getOwner());
but in this case the owner window is not blocked.
I want my dialog showing up on a maximized window without moving it. The maximized window should be blocked while the dialog is open. How can I do this?
Btw. I am using java 8 and javafx on linux.
Tanks!