I feel like I'm missing something easy but I'm not sure what it is. Here is my code:
#FXML
private Label label;
private Button startGameButton;
#FXML
private void startGame (ActionEvent event) {
label.setText("Ok. Let's begin.");
startGameButton.setVisible(false);
}
I made a button in Scene Builder and set its fx:id to startGameButton. I'm just trying to make the startGameButton disappear when I click on it. I thought this would be sufficient but I'm getting a
Caused by: java.lang.NullPointerException
at myjavafx2.FXMLDocumentController.startGame(FXMLDocumentController.java:29)
I feel as though the NullPointerException is telling me the button doesn't exist but I made it in Scene Builder. I don't think I would need to do Button startGameButton = new Button(); because Scene Builder should be doing that for me. What am I missing?
You have to add #FXML before your Button as well.
Like this:
#FXML
private Label label;
#FXML
private Button startGameButton;
#FXML
private void startGame (ActionEvent event) {
label.setText("Ok. Let's begin.");
startGameButton.setVisible(false);
}
Related
I use a JavaFX Popup in my application to change the Shipping Address of a customer. That often requires copy pasting the Address from the web browser. If I click on the Popup after the application lost focus it will not regain focus. I first need to click the parent window behind the popup and then click the Popup again to be able to interact with it.
Is there any way to solve that problem, besides using an undecorated stage instead of a Popup?
EDIT:
Here I made a minimal example:
public class HelloApplication extends Application {
#Override
public void start(Stage stage) throws IOException {
Scene scene = new Scene(new VBox(), 600, 600);
stage.setTitle("Hello!");
stage.setScene(scene);
stage.show();
Popup popup = new Popup();
Button btn = new Button("This is a very nice button!");
btn.setOnAction(actionEvent -> System.out.println("button clicked"));
TextField textField = new TextField();
textField.setOnMouseClicked(mouseEvent -> System.out.println("textField clicked"));
VBox popupVBox = new VBox(btn, textField);
popupVBox.setStyle("-fx-background-color: white");
popupVBox.setPadding(new Insets(10));
popup.getContent().add(popupVBox);
popup.show(scene.getWindow());
}
public static void main(String[] args) {
launch();
}
}
If you click outside of the application (for example the web browser, to copy some value) then you can not enter Text into the TextField anymore. The button action listener and even the TextField mouse Listener still work and output "button clicked" and "textField clicked" but the blue halo around them does not apppear and you can not enter (or paste) text into the TextField. After you click somewhere on the main Stage of the application it works again.
I tried adding textField.requestFocus();
to the mouse Listener of the textfield but that does not do anything.
EDIT 2 after the comment from kleopatra:
I tried adding the following code:
popupVBox.setOnMouseEntered(mouseEvent -> {
popup.getOwnerWindow().requestFocus();
parentVBox.toFront(); //This is created above and passed to the new Scene instead of diectly passing new VBox() as in the code snippet posted above
});
With that code added, popup and its children seem to have focus if the mouse is hoverd over it after an other application had focus, i.e. if clicked with the mouse the blue border appears around the button and textField, and if there is any text in the textField I can move the cursor with the mouse and select the text with the mouse, buy any keyboard inputs are ignored. Actually they are executed in the other application which had focus before. If I ctrl+c in Intellij and try to ctrl+v into the textfield it will be pasted to the Intellij editor. Also the arrow keys move the cursor in the intellij window instead of the textField.
The only way to be able to type anything in the TextField is to click the parent window first.
Also
textField.setOnMouseClicked(mouseEvent -> {
textField.requestFocus();
});
does not do anything
not an answer, just to clarify the comment (will delete if seen by OP :)
public class PopupFocus extends Application {
#Override
public void start(Stage stage) throws IOException {
Scene scene = new Scene(new VBox(), 300, 300);
stage.setTitle("Hello!");
stage.setScene(scene);
stage.setX(10);
stage.show();
Popup popup = new Popup();
Button btn = new Button("This is a very nice button!");
btn.setOnAction(actionEvent -> System.out.println("button clicked"));
TextField textField = new TextField();
textField.setOnMouseClicked(mouseEvent -> {
System.out.println("textField clicked");
stage.toFront();
});
VBox popupVBox = new VBox(btn, textField);
popupVBox.setStyle("-fx-background-color: white");
popupVBox.setPadding(new Insets(10));
popup.getContent().add(popupVBox);
// original
popup.show(scene.getWindow());
}
public static void main(String[] args) {
launch();
}
}
I want to close scene(which is currently opened),
i want to do like Cancel or close button operation
written the statement
x.show();
in another class
and want to close x means
x.close();
in another class
#FXML
private void closeScene(ActionEvent event){
final Node source = (Node) event.getSource();
final Stage stage = (Stage) source.getScene().getWindow();
stage.close();
}
I have a PopOver with a TextField with a strange behavior, this PopOver it's owned by other TextField because when I type the word 'Fernández' all keys are processed by the internal TextField except when I type a stressed vowel like 'á' that it's collected by the external TextField.
PopOver owned by TextField
But when i show the same PopOver owned by a button works fine and the internal TextField receives the letter 'á'
PopOver owned by Button
I would appreciate any help to solve it.
EDIT: Here you can see an example code to show this.
public class PopOverTest extends Application {
#Override
public void start(Stage primaryStage) {
CustomTextField externo = new CustomTextField();
ImageView imgView = new ImageView(new Image("test/image.png"));
externo.setLeft(imgView);
CustomTextField interno = new CustomTextField();
PopOver popOver = new PopOver();
popOver.setContentNode(interno);
popOver.stArrowLocation(PopOver.ArrowLocation.TOP_LEFT);
imgView.setOnMouseClicked(e -> {
popOver.show(imgView);
});
StackPane root = new StackPane();
root.getChildren().add(externo);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
I found a solution for this.
Changing the external Textfield EventDispatcher and the problem is resolved
EventDispatcher dispatcher = externalTextField.getEventDispatcher();
then on focus of the internal TextField
externalTextField.setEventDispatcher(interntalTextField.getEventDispatcher());
and when lost focus restore the EventDispatcher
externalTextField.setEventDispatcher(dispatcher);
That's all folks!
Firstly, sorry for my English. I hope, you unterstand it.
Last Month I started developing a little programm with FXML/ JavaFX.
I have two screens, and I'm switching between them. This is not the problem.
The problem is: On one Screen i have a listview, where i can choose an item. When i have chosen an item, i want to open a new tab on the other screen with the content of the item. Therefore, i have to click on a button.
When i have chosen an item, i can print out the selected item, but how do I open a new tab on the other screen. Both Screens a two different FXML and are activited from the controller. How can I add a Tab, although loading fxml?
public class Controller{
#FXML
private ListView<String> lv;
#FXML
private Button check;
#FXML
public void projectview (Event e3) throws Exception{
Stage stage = null;
Parent root = null;
if(e3.getSource()==check){
//Check is the declaration for the Button on the screen with the listview
String projectview= lv.getSelectionModel().getSelectedItem();
stage = (Stage) check.getScene().getWindow();
root = FXMLLoader.load(getClass().getResource("FXML1.fxml"));
//Here I want to add a tab in FXML1.fxml
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
}
}
If something is missing or not clear, please ask. I read other similar questions, but i don't know, what to do.
Thanks for help
I'm very new to javafx and scenebuilder.
I was trying to create a new label when a button is clicked. Following is the method for the button to create a label:
#FXML
public void enterTextMouse(MouseEvent e){
Label lbl1 = new Label(txtCmd.getText());
}
But it doesn't work. :(
Is it because I didn't create lbl1 in my fxml?
Is it possible to create a label in my java code without creating in fxml?
Please help me!
Let's make one pane and set fx:id(paneLoadLabel) in scenebuilder
Write this in controller
#FXML
private Pane panelLoadLabel;
#FXML
public void enterTextMouse(MouseEvent e){
Label lbl1 = new Label(txtCmd.getText());
paneLoadLabel.getChildren().add(lbl1);
}