I create TreeView in .fxml file and then i am trying to show root node. but it's not showing.
Here is my code.
<TabPane prefHeight="289.0" prefWidth="246.0" styleClass="tab-pane" tabClosingPolicy="UNAVAILABLE" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<stylesheets>
<URL value="#main.css" />
</stylesheets>
<tabs>
<Tab text="TestBed Explorer">
<content>
<AnchorPane id="Content" fx:id="soariteAnchorScollparent" minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<ScrollPane fx:id="soariteTreeScrollPane" prefHeight="259.0" prefWidth="246.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<content>
<AnchorPane id="Content" fx:id="soariteTreeAnchorPane" minHeight="0.0" minWidth="0.0" prefHeight="249.0" prefWidth="73.0">
<children>
<TreeView fx:id="soariteTree" prefHeight="245.0" prefWidth="79.0" showRoot="true" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="167.0" AnchorPane.topAnchor="0.0">
<TreeItem expanded="true" value="categories" fx:id="rootTreeItem" />
</TreeView>
</children>
</AnchorPane>
</content>
</ScrollPane>
</children>
</AnchorPane>
</content>
</Tab>
</tabs>
</TabPane>
I also give reference of this in main class like.
public class Mainextends Application {
#FXML
public TreeView<String> soariteTree;
#FXML
public TreeItem<String> rootTreeItem;
Please give me any reference or hint.
You have done a small mistake with fxml,
you can see you have written AnchorPane.rightAnchor="167.0" which is making your tree view disappear (and same small mistakes with width of anchor pane and tree view).
replace your of scroll pane with,
<ScrollPane fx:id="soariteTreeScrollPane" prefHeight="259.0" prefWidth="246.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<content>
<AnchorPane id="Content" fx:id="soariteTreeAnchorPane" minHeight="0.0" minWidth="0.0" prefHeight="-1.0" prefWidth="-1.0">
<children>
<TreeView fx:id="soariteTree" prefHeight="-1.0" prefWidth="-1.0" showRoot="true" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<TreeItem expanded="true" value="categories" fx:id="rootTreeItem" />
</TreeView>
</children>
</AnchorPane>
</content>
</ScrollPane>
UPDATE :- Handling of Mouse Event
soariteTree.addEventHandler(MouseEvent.MOUSE_PRESSED, new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
if (event.getButton().equals(MouseButton.SECONDARY)) {
System.out.println(">> " + event.getEventType());
}
}
});
your fxml will be,
<TreeView fx:id="categoryTreeView" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" minWidth="200.0" prefHeight="-1.0" prefWidth="200.0" showRoot="true" styleClass="master-tree" VBox.vgrow="ALWAYS">
<TreeItem expanded="true" value="categories" fx:id="categoryTreeItem" />
</TreeView>
And Your Controller will be,
public class MyClass extends Application {
#FXML private TreeItem<ItemMaster> categoryTreeItem;
#FXML private TreeView<ItemMaster> categoryTreeView;
So you dont need to create a root for your tree. And you are done.
Related
I am building a JavaFX which has two windows: a signin window and a register window. The fxml file of the former has a "username" label and text field, a "password" label and text field, a "signin" button, a "close" button and a hyperlink that reads "or create a new user". I want that when users click on the hyperlink, a registration window pop-up with labels and text fields asking for the user to enter a user name, password, first name, etc.
I have a Login.fxml file and a LoginController.java file for the sign in window. And for the registration window I have a CreateUser.fxml file and a CreateUSerController.java file.
My problem is how to load the CreateUser.fxml file (and make the registration window pop-up) from the LoginController.java file. I handle the clicking on the "or create a new user" hyperlink event in LoginController.java, and basically the result I expect of the handling is to make the registration window to pop-up. I get a runtime error.
When I click on the "or create a new user" hyperlink in the login window I get the following error: The Eclipse debugger says "Thread[JavaFX Application Thread](Suspended(uncaught exception RuntimeException))". Also, when I check the value of the variables during execution there is a "runWithoutRenderLock() is throwing", and its value is RuntimeException. Also says that its cause is a "InvocationTargetException", and that the cause of this exception is a "null". Also, a "QuantumToolkit.class" tab appears in eclipse with the message "Source not found" "The JAR file ... has no source attachment". It also has a clickable button that reads "Attach source"
To load "CreateUser.fxml" from "LoginController.java" I used a handler which tries to load the fxml file with this line of code: "root = FXMLLoader.<Parent>load(CreateUserController.class.getResource("CreateUser.fxml"));". Here is where the exception occurs
Please find below my Main class which is where I load the "Login.fxml" file, the "Login.fxml", "LoginController.java", "CreateUser.fxml" and CreateUSerController.java files. Also, an image of my file structure.
File structure
src
/application
-Main.java
/controller
-LoginController.java
-CreateUserController.java
/model
/view
-Login.fxml
-CreateUser.fxml
-module-info.java
Main.java
package application;
import java.io.IOException;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.fxml.FXMLLoader;
public class Main extends Application {
#Override
public void start(Stage signinStage) throws IOException {
try {
BorderPane root = (BorderPane)FXMLLoader.load(getClass().getResource("/view/Login.fxml"));
Scene scene = new Scene(root,400,400);
signinStage.setTitle("Welcome to MyHEalth");
signinStage.setScene(scene);
signinStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) throws IOException {
launch(args);
}
}
Login.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Hyperlink?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<BorderPane xmlns="http://javafx.com/javafx/19" xmlns:fx="http://javafx.com/fxml/1" fx:controller="controller.LoginController">
<center>
<VBox alignment="CENTER" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="400.0" BorderPane.alignment="CENTER">
<children>
<Label maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="21.0" prefWidth="300.0" text="Username">
<VBox.margin>
<Insets bottom="10.0" />
</VBox.margin>
</Label>
<TextField fx:id="userNameField" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="25.0" prefWidth="300.0">
<VBox.margin>
<Insets bottom="20.0" />
</VBox.margin>
</TextField>
<Label prefHeight="17.0" prefWidth="300.0" text="Password">
<VBox.margin>
<Insets bottom="10.0" />
</VBox.margin>
</Label>
<TextField fx:id="passwordField" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="25.0" prefWidth="300.0" />
<BorderPane prefHeight="100.0" prefWidth="200.0">
<center>
<HBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="30.0" prefWidth="170.0" BorderPane.alignment="CENTER">
<children>
<Button fx:id="signinButton" maxWidth="-Infinity" mnemonicParsing="false" onAction="#signin" prefWidth="70.0" text="Sign in" />
<Button fx:id="closeButton" alignment="CENTER" maxWidth="-Infinity" mnemonicParsing="false" onAction="#close" prefWidth="60.0" text="Close" textAlignment="RIGHT">
<HBox.margin>
<Insets left="40.0" />
</HBox.margin>
</Button>
</children>
</HBox>
</center>
<bottom>
<Hyperlink fx:id="newUserLink" onAction="#openNewUserWindow" text="or create new user" BorderPane.alignment="CENTER" />
</bottom>
</BorderPane>
</children>
</VBox>
</center>
</BorderPane>
LoginController.java
package controller;
import java.io.IOException;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Hyperlink;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
import model.User;
public class LoginController {
#FXML
private Button closeButton;
#FXML
private Hyperlink newUserLink;
#FXML
private TextField passwordField;
#FXML
private Button signinButton;
#FXML
private TextField userNameField;
private Stage stage;
private Parent root;
#FXML
void signin(ActionEvent event) {
passwordField.getText();
userNameField.getText();
User user = new User(passwordField.getText(), "first name", "last name", userNameField.getText(), "imagepath");
//still have to get the rest of the information from the database
System.out.print(user.getProfile().getFirstName());//debugging message
}
#FXML
void close(ActionEvent event) {
System.out.print("Thanks for visiting MyHealth. Bye");
System.exit(0);
}
#FXML
void openNewUserWindow(ActionEvent event) {
try {
System.out.print("1st line Inside 'try' block of 'openNewUserWindow' in LoginController");
//System.out.println("\nJust after FXMLLoader Inside 'try' block of 'openNewUserWindow' in LoginController");
root = FXMLLoader.<Parent>load(CreateUserController.class.getResource("CreateUser.fxml"));
//System.out.print("last line Inside 'try' block of 'openNewUserWindow' in LoginController");
}
catch(IOException e){
System.out.print("Problem getting 'CreateUSer.fxml'");
}
Stage createUserStage = new Stage();
Scene createUserScene = new Scene(root, 400, 400);
createUserStage.setScene(createUserScene);
createUserStage.setTitle("Create a new user");
createUserStage.show();
}
}
CreateUser.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="500.0" prefWidth="400.0" xmlns="http://javafx.com/javafx/19" xmlns:fx="http://javafx.com/fxml/1" fx:controller="controller.CreateUserController">
<children>
<VBox layoutY="30.0" prefHeight="440.0" prefWidth="400.0">
<children>
<ImageView fitHeight="82.0" fitWidth="100.0" pickOnBounds="true" preserveRatio="true">
<VBox.margin>
<Insets left="150.0" top="10.0" />
</VBox.margin>
</ImageView>
<Label fx:id="clickImage" text="Click to select profile picture" textFill="#00000093">
<VBox.margin>
<Insets bottom="20.0" left="125.0" />
</VBox.margin>
</Label>
<Label text="Username">
<VBox.margin>
<Insets bottom="5.0" left="50.0" />
</VBox.margin>
</Label>
<TextField fx:id="userName" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="25.0" prefWidth="280.0">
<VBox.margin>
<Insets bottom="10.0" left="50.0" />
</VBox.margin>
</TextField>
<Label text="First name">
<VBox.margin>
<Insets bottom="5.0" left="50.0" />
</VBox.margin>
</Label>
<TextField fx:id="firstName" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefWidth="280.0">
<VBox.margin>
<Insets bottom="10.0" left="50.0" />
</VBox.margin>
</TextField>
<Label text="Last name">
<VBox.margin>
<Insets bottom="5.0" left="50.0" />
</VBox.margin>
</Label>
<TextField fx:id="lastName" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefWidth="280.0">
<VBox.margin>
<Insets bottom="10.0" left="50.0" />
</VBox.margin>
</TextField>
<Label text="Password">
<VBox.margin>
<Insets bottom="5.0" left="50.0" />
</VBox.margin>
</Label>
<TextField fx:id="password" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefWidth="280.0">
<VBox.margin>
<Insets bottom="10.0" left="50.0" />
</VBox.margin>
</TextField>
<VBox prefHeight="200.0" prefWidth="100.0">
<children>
<HBox prefHeight="100.0" prefWidth="200.0">
<children>
<Button fx:id="createButton" mnemonicParsing="false" onAction="#create" text="Create user">
<HBox.margin>
<Insets left="100.0" top="15.0" />
</HBox.margin>
</Button>
<Button fx:id="closeButton" mnemonicParsing="false" onAction="#close" text="Close">
<HBox.margin>
<Insets left="30.0" top="15.0" />
</HBox.margin>
</Button>
</children>
</HBox>
<Label fx:id="createdLabel" text="Created user" textFill="#2b784f">
<VBox.margin>
<Insets left="125.0" top="20.0" />
</VBox.margin>
</Label>
</children>
</VBox>
</children>
</VBox>
</children>
</AnchorPane>
CreateUSerController.java
package controller;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
public class CreateUserController {
#FXML
private Label clickImage;
#FXML
private Button closeButton;
#FXML
private Button createButton;
#FXML
private Label createdLabel;
#FXML
private TextField firstName;
#FXML
private TextField lastName;
#FXML
private TextField password;
#FXML
private TextField userName;
#FXML
void close(ActionEvent event) {
}
#FXML
void create(ActionEvent event) {
}
}
First of all, I personally prefer to instantiate a new FXMLLoader instance to load a fxml file. Then you can also specify a location and some other kind of stuff like a controller factory.
You can lookup the setter methods here: https://docs.oracle.com/javase/8/javafx/api/javafx/fxml/FXMLLoader.html
But in this case your only mistake is that you load the fxml from the wrong class location.
When you use "CreateUserController.class.getResource("CreateUser.fxml")", it will try to find the fxml file in the same directory like the class. You have to use another path like you did before with the login fxml file. ("/view/CreateUser.fxml")
I hope that helps.
I am using an fxml file to to create my java fx UI.
the file is:-
<?import java.lang.String?>
<?import javafx.collections.FXCollections?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.ComboBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.layout.VBox?>
<AnchorPane fx:id="ap" maxHeight="1.7976931348623157E308"
maxWidth="1.7976931348623157E308" minHeight="-Infinity" minWidth="-Infinity"
prefHeight="480.0" prefWidth="840.0" xmlns="http://javafx.com/javafx/8.0.65"
xmlns:fx="http://javafx.com/fxml/1" fx:controller="ch.Buildsapp.Main.BuildsController">
<children>
<VBox prefHeight="200.0" prefWidth="100.0"
AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0"
AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<HBox alignment="CENTER_LEFT" spacing="20.0" VBox.vgrow="NEVER">
<padding>
<Insets bottom="12.0" left="12.0" right="12.0" top="12.0" />
</padding>
<children>
<GridPane hgap="10.0" HBox.hgrow="NEVER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0"
vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Label prefHeight="21.0" prefWidth="88.0" text="Platform" />
<ComboBox fx:id="versionCombo" prefHeight="31.0"
prefWidth="108.0" GridPane.rowIndex="1">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="Win" />
<String fx:value="Mac" />
</FXCollections>
</items>
<value>
<String fx:value="Mac" />
</value>
</ComboBox>
<Label prefHeight="21.0" prefWidth="80.0" text="Product"
GridPane.columnIndex="1" />
<ComboBox fx:id="verCombo" prefHeight="31.0" prefWidth="127.0"
promptText="build" GridPane.columnIndex="1" GridPane.rowIndex="1">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="build" />
<String fx:value="build2" />
</FXCollections>
</items>
</ComboBox>
<Label text="Version" GridPane.columnIndex="2" />
<ComboBox fx:id="versionNo" prefHeight="31.0"
prefWidth="109.0" GridPane.columnIndex="2" GridPane.rowIndex="1" />
<Label prefHeight="21.0" prefWidth="60.0" text="Server"
GridPane.columnIndex="3" />
<ComboBox fx:id="locCombo" prefHeight="31.0" prefWidth="103.0"
GridPane.columnIndex="3" GridPane.rowIndex="1">
<items>
<FXCollections fx:factory="observableArrayList">
<String fx:value="SJ" />
<String fx:value="MN" />
</FXCollections>
</items>
<value>
<String fx:value="SJ" />
</value>
</ComboBox>
<Button fx:id="downloadButton" minWidth="80.0"
mnemonicParsing="false" text="Download" GridPane.columnIndex="4"
GridPane.rowIndex="1" />
<Button fx:id="installButton" minWidth="80.0"
mnemonicParsing="false" text="Install" GridPane.columnIndex="5"
GridPane.rowIndex="1" />
<Button fx:id="locButton" mnemonicParsing="false"
prefHeight="31.0" prefWidth="120.0" text="Open Folder"
GridPane.columnIndex="6" GridPane.rowIndex="1" />
</children>
</GridPane>
</children>
</HBox>
<TableView fx:id="tableView" VBox.vgrow="ALWAYS">
<columns>
<TableColumn fx:id="builds" prefWidth="482.0" text="Builds" />
<TableColumn fx:id="date" minWidth="0.0" prefWidth="500.0"
text="Date" />
</columns>
</TableView>
</children>
</VBox>
</children>
</AnchorPane>
It works fine in windows while in mac when I launch the app the app window does not appear as expected but it appears as a small window on the top left corner.
The similar issue is appearing with the progress dialog which I am using it works fine in Windows but in mac(OS X) when the app is expanded like when app window size is maximum the progress dialog is also covering the whole display screen while I have given fixed size to scene window.
This is my progress bar code:-
public ProgressBar startProgressBar() {
primaryStage = new Stage();
ProgressBar pb = new ProgressBar(0);
//ProgressIndicator pi = new ProgressIndicator(0);
//pi.progressProperty().bind(pb.progressProperty());
HBox hb = new HBox();
hb.setSpacing(5);
hb.setAlignment(Pos.CENTER);
hb.getChildren().addAll(pb);
Scene scene = new Scene(hb, 300, 100);
primaryStage.setScene(scene);
primaryStage.setTitle("Downloading Build...");
primaryStage.show();
return pb;
}
I am able find the solution for the first issue that can be solved my fixing the minHight and minWidth of the anchor panel to some value in fxml file instead of infinity but I am still not able to find the solution for the second issue.
I'm trying to use a searchbox in another stage by using fxml for the layout.
It it showing absolutely correct,but it doesn't react to any events.It seems that the elements are not found.
What is wrong with my code?
import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.stage.*;
import javafx.scene.*;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.Label;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
public class SearchBox{
//tabs
#FXML
private static TabPane frepl_tabPane=new TabPane();
#FXML
private static Tab frepl_tabReplace=new Tab();
#FXML
private static Tab frepl_tabSearch=new Tab();
//search
//search Controls
#FXML
private static TextField fr_searchInput=new Textfield();
#FXML
private static Button fr_find=new Button();
private static Stage stage = new Stage();
public static void display(String title) throws IOException {
Parent root = FXMLLoader.load(SearchBox.class.getResource("find_replace.fxml"));
Scene scene = new Scene(root);
stage.setTitle(title);
stage.setScene(scene);
stage.showAndWait();
frepl_tabPane.getSelectionModel().selectedItemProperty().addListener((obs,ov,nv)->{
//no reaction here
stage.setTitle(nv.getText());
System.out.println("pane was tabbed");
});
fr_find.setOnMouseClicked(e ->{
//no reaction here
System.out.println("search");
});
}
To open it i use (inside of the "initialize" function of another FXMLDocumentControler):
btn_search.setOnMouseClicked(e->{
try {
SearchBox.display("search");
} catch (IOException ex) {
Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex);
}
});
Here is the stack trace(when everything is non static e.g. the class,methods and fields). it appears,when i close the window.
Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
at SearchBox.display(SearchBox.java:133)
at FXMLDocumentController.lambda$A_table_buttons$22(FXMLDocumentController.java:1309)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$ClickGenerator.postProcess(Scene.java:3470)
at javafx.scene.Scene$ClickGenerator.access$8100(Scene.java:3398)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3766)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:352)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:275)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:388)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:387)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)
FXML file:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<Pane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="508.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
<children>
<TabPane fx:id="frepl_tabPane" layoutX="-1.0" layoutY="2.0" prefHeight="400.0" prefWidth="508.0" tabClosingPolicy="UNAVAILABLE">
<tabs>
<Tab fx:id="frepl_tabSearch" text="Search">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<TableView fx:id="fr_Stableview" layoutY="87.0" prefHeight="287.0" prefWidth="508.0">
<columns>
<TableColumn fx:id="fr_Sline" editable="false" prefWidth="75.0" sortable="false" text="Line" />
<TableColumn fx:id="fr_SColumn" editable="false" prefWidth="61.0" sortable="false" text="Column" />
<TableColumn fx:id="fr_SValue" editable="false" prefWidth="371.0" sortable="false" text="Value" />
</columns>
</TableView>
<TextField fx:id="fr_searchInput" layoutX="66.0" layoutY="13.0" prefHeight="25.0" prefWidth="250.0" />
<Label layoutX="3.0" layoutY="17.0" text="Search for:" />
<Button fx:id="fr_find" layoutX="324.0" layoutY="13.0" mnemonicParsing="false" text="Find" />
<Button fx:id="fr_findAll" layoutX="372.0" layoutY="13.0" mnemonicParsing="false" text="Find All" />
<CheckBox fx:id="fr_matchCaseS" layoutX="324.0" layoutY="53.0" mnemonicParsing="false" text="Match case (Aa)" />
<Label fx:id="fr_foundS" layoutX="8.0" layoutY="70.0" text="found: 5" underline="true">
<font>
<Font name="System Bold Italic" size="12.0" />
</font>
</Label>
</children>
</AnchorPane>
</content>
</Tab>
<Tab fx:id="frepl_tabReplace" text="Replace">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<TableView fx:id="fr_tableviewR" layoutY="107.0" prefHeight="267.0" prefWidth="508.0">
<columns>
<TableColumn fx:id="fr_lineR" prefWidth="75.0" text="Line" />
<TableColumn fx:id="fr_ColumnR" prefWidth="61.0" text="Column" />
<TableColumn fx:id="fr_ValueR" prefWidth="371.0" text="Value" />
</columns>
</TableView>
<CheckBox fx:id="fr_matchCaseR" layoutX="347.0" layoutY="59.0" mnemonicParsing="false" text="Match case (Aa)" />
<Label layoutX="3.0" layoutY="17.0" text="Search for:" />
<Button fx:id="fr_replace" layoutX="347.0" layoutY="11.0" mnemonicParsing="false" text="Replace" />
<TextField fx:id="fr_replaceInput" layoutX="82.0" layoutY="13.0" prefHeight="25.0" prefWidth="250.0" />
<Button fx:id="fr_replaceAll" layoutX="412.0" layoutY="11.0" mnemonicParsing="false" text="Replace All" />
<TextField fx:id="fr_replaceAllInput" layoutX="82.0" layoutY="55.0" prefHeight="25.0" prefWidth="250.0" />
<Label layoutX="3.0" layoutY="59.0" text="Replace with:" />
<Label fx:id="fr_replacedR" layoutX="3.0" layoutY="90.0" text="replaced: 5" underline="true">
<font>
<Font name="System Bold Italic" size="12.0" />
</font>
</Label>
</children>
</AnchorPane>
</content>
</Tab>
</tabs>
</TabPane>
</children>
</Pane>
The question basically says it all, with the caveat that I'm a newbie to GUI design in general and JavaFX in particular. To reproduce in SceneBuilder, drag a TabPane onto the scene, and drag a SplitPane into the first tab's AnchorPane. Adjust (drag) the size of the SplitPane to match the the size of the tab. This is not a problem if the SplitPane is not a child (I only tested it as a (grand)child of a Tab so far). You'll have something like this:
Upon preview, if you try to expand the window size by dragging, the SplitPane won't resize:
Here is the FXML I get from SceneBuilder, using the process described at the top of this post with perhaps a few minor changes that didn't help:
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<TabPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" tabClosingPolicy="UNAVAILABLE" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8">
<tabs>
<Tab text="Untitled Tab 1">
<content>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="0.0" minWidth="0.0" prefHeight="386.0" prefWidth="613.0">
<children>
<SplitPane dividerPositions="0.29797979797979796" maxHeight="-Infinity" maxWidth="-Infinity" prefHeight="358.0" prefWidth="600.0">
<items>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0" />
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="158.0" prefWidth="277.0" />
</items>
</SplitPane>
</children></AnchorPane>
</content>
</Tab>
<Tab text="Untitled Tab 2">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</Tab>
</tabs>
</TabPane>
The problem is that your SplitPane is a child of an AnchorPane. In case you have something under AnchorPane, it is anchored to specific co-ordinates. To allow the child to take up the whole are, you need to specify the AnchorPane's anchor to zero.
<TabPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" tabClosingPolicy="UNAVAILABLE" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8">
<tabs>
....
<SplitPane dividerPositions="0.29797979797979796" maxHeight="-Infinity"
maxWidth="-Infinity" prefHeight="358.0" prefWidth="600.0"
AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0"
AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
....
</tabs>
</TabPane>
Using scene-builder, you can assign the AnchorPane Constraints by:
Select the child under AnchorPane
Move to Layout section on the right hand side panel
You will see a section called AnchorPane constraints, just type in the four section values and save
I've generated FXML in Scene Builder:
<?xml version="1.0" encoding="UTF-8"?>
<?scenebuilder-preview-i18n-resource ../lang/ru_RU.properties?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" fx:id="mainStagePane" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="UI.MainStageController">
<children>
<SplitPane dividerPositions="0.6596244131455399" focusTraversable="true" prefHeight="-1.0" prefWidth="1280.0" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="160.0">
<items>
<AnchorPane id="rootPane" fx:id="pane3d" prefHeight="930.0" prefWidth="1280.0" />
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
<children>
<Accordion id="accordeon" fx:id="accordion" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<panes>
<TitledPane animated="true" text="%3dSceneSettings" fx:id="x2">
<content>
<AnchorPane id="Content" minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<Slider fx:id="farClipSlider" layoutY="50.0" majorTickUnit="10.0" max="100.0" min="-100.0" minorTickCount="1" prefWidth="337.0" showTickLabels="true" showTickMarks="true" AnchorPane.leftAnchor="14.0" AnchorPane.rightAnchor="75.0" />
<TextField layoutY="14.0" prefWidth="55.0" AnchorPane.rightAnchor="217.0" />
<Slider fx:id="distanceSlider" blockIncrement="25.0" layoutX="14.0" layoutY="133.0" majorTickUnit="50.0" max="500.0" min="-500.0" minorTickCount="25" prefWidth="399.0" showTickLabels="true" showTickMarks="true" snapToTicks="true" />
<VBox layoutY="364.0" prefHeight="200.0" prefWidth="100.0" AnchorPane.leftAnchor="14.0" AnchorPane.rightAnchor="14.0">
<children>
<HBox prefHeight="-1.0" prefWidth="-1.0">
<children>
<Label text="Label" />
<TextField prefWidth="55.0" />
</children>
</HBox>
<Slider fx:id="nearClipSlider" blockIncrement="1.0" majorTickUnit="10.0" max="100.0" min="-100.0" minorTickCount="1" prefWidth="338.0" showTickLabels="true" showTickMarks="true" snapToTicks="true" value="0.0" />
</children>
</VBox>
<Label layoutX="104.0" layoutY="17.0" text="Label" />
</children>
</AnchorPane>
</content>
</TitledPane>
<TitledPane animated="true" expanded="false" text="%3dModelSettings" fx:id="x1">
<content>
<AnchorPane id="Content" minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" />
</content>
</TitledPane>
</panes>
</Accordion>
</children>
</AnchorPane>
</items>
</SplitPane>
<ToolBar maxHeight="30.0" minHeight="30.0" prefHeight="30.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0">
<items>
<ProgressBar fx:id="loadProgressBar" disable="false" prefWidth="200.0" progress="0.0" visible="true" />
</items>
</ToolBar>
<TabPane prefHeight="160.0" prefWidth="200.0" tabClosingPolicy="UNAVAILABLE" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<tabs>
<Tab text="%file">
<content>
<AnchorPane id="Content" minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<Button alignment="CENTER" graphicTextGap="4.0" mnemonicParsing="false" prefHeight="90.0" prefWidth="90.0" text="%openFile" textAlignment="CENTER" textOverrun="ELLIPSIS" underline="false" wrapText="true" AnchorPane.leftAnchor="14.0" AnchorPane.topAnchor="14.0" />
<Separator layoutX="170.0" orientation="VERTICAL" prefHeight="200.0" AnchorPane.bottomAnchor="10.0" AnchorPane.topAnchor="10.0" />
</children>
</AnchorPane>
</content>
</Tab>
<Tab text="%analysis">
<content>
<AnchorPane id="Content" minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<Button mnemonicParsing="false" prefHeight="90.0" prefWidth="90.0" text="Button" AnchorPane.leftAnchor="14.0" AnchorPane.topAnchor="14.0" />
</children>
</AnchorPane>
</content>
</Tab>
</tabs>
</TabPane>
</children>
</AnchorPane>
But suddenly I received the following exception:
javafx.fxml.LoadException:
/D:/Projects/CastAnalytics/out/production/CastAnalytics/UI/MainStage.fxml
at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2592)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2570)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2416)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3160)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3121)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3094)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3070)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3062)
at core.CastAnalytics.start(CastAnalytics.java:32)
at com.sun.javafx.application.LauncherImpl$8.run(LauncherImpl.java:837)
at com.sun.javafx.application.PlatformImpl$7.run(PlatformImpl.java:331)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:297)
at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:294)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$300(WinApplication.java:39)
at com.sun.glass.ui.win.WinApplication$4$1.run(WinApplication.java:112)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NullPointerException
at UI.MainStageController.set(MainStageController.java:98)
at UI.MainStageController.initialize(MainStageController.java:34)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2523)
... 18 more
What does it mean and how can I fix it?
Well, you've got a null pointer at line 98 of MainStageController....
If I had to guess, I'd say that one of the #FXML variables you've defined in your Controller isn't named the same as in your FXML file, so you're getting a NPE.
You'd have to paste the relevant MainStageController.java code for anyone to know more.
Please post the offending line or SSCE if possible. I agree with jhsheets and your approach double checking the variable names against your fx:id names. I have encountered this exact error/situation myself at exactly the same place (in the initialize method trying to do some post-loading initialization) where a small typo in my fx:I'd caused an NPE. But it would be good to know what is going on in the set method where the NPE originates.