Passing a Button in FXML using JavaFX - javafx

Question

Hello I Have this portion of my code, I actually need disable the button when the user is logging, I am trying to pass the button to the FXML, but nothing happens: this is the code in the Main Controller, when the user is logged and data match with the password and username the button with the variable btn1 must disabled, I post my entire code for any help.
public Button getBtn1() {
return btn1;
}
public void conexion () {
String usus="";
String Passu ="";
String Bd="jdbc:sqlserver: // THUMANO2:1433;databaseName=QUORA";
String Usuario="sa";
String Pass="milkas87";
String SqlQuery= "select NOMBREUSUARIO, CONVERT (VARCHAR(50), (DecryptByPassPhrase('*xc/6789oÑ---+y',PASS))) as PASS from usuarios where CONVERT (VARCHAR(50), (DecryptByPassPhrase('*xc/6789oÑ---+y',PASS)))='"+fcontrasena.getText().toString().trim()+"'";
Connection Conexion = null;
try {
Conexion=DriverManager.getConnection(Bd, Usuario, Pass);
PreparedStatement ps =Conexion.prepareStatement(SqlQuery);
ResultSet rs = ps.executeQuery();
while(rs.next()) {
usus = rs.getString("NOMBREUSUARIO");
Passu = rs.getString("PASS");
}
if(fcontrasena.getText().toString().trim().equals(Passu) && fusuario.getText().toString().equals(usus)) {
Stage administrador=new Stage();
try {
FXMLLoader loader = new FXMLLoader(getClass().getResource("Admin.fxml"));
Stage login=(Stage)fusuario.getScene().getWindow();
Parent root = loader.load();
AdminScreenController controlador = loader.<AdminScreenController>getController();
controlador.setBtn1(btn1);
Scene scene=new Scene(root);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
administrador.setScene(scene);
administrador.setTitle("AdminScreen");
login.hide();
administrador.show();
} catch(Exception e) {}
}
} catch(SQLException e) {
JOptionPane.showMessageDialog(null,"error","ERROR",0);
}
}
this is the code for AdminScreenController:
public void setBtn1(Button btn1) {
btn1.setDisable(true);
}
this is the FXML Document:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.image.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<StackPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="576.0" prefWidth="791.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.AdminScreenController">
<children>
<BorderPane fx:id="bpane" prefHeight="621.0" prefWidth="791.0">
<left>
<VBox fx:id="vboxr" prefHeight="576.0" prefWidth="205.0" BorderPane.alignment="CENTER">
<children>
<BorderPane prefHeight="106.0" prefWidth="205.0">
<center>
<Button fx:id="btn1" mnemonicParsing="false" prefHeight="51.0" prefWidth="127.0" text="Planilla Sistemas" BorderPane.alignment="CENTER" />
</center>
</BorderPane>
<BorderPane prefHeight="106.0" prefWidth="205.0">
<center>
<Button fx:id="btn2" mnemonicParsing="false" prefHeight="51.0" prefWidth="127.0" text="AMP" BorderPane.alignment="CENTER" />
</center>
</BorderPane>
<BorderPane prefHeight="116.0" prefWidth="205.0">
<center>
<Button fx:id="btn3" mnemonicParsing="false" prefHeight="51.0" prefWidth="127.0" text="Tareas Funcionarios" BorderPane.alignment="CENTER" />
</center>
</BorderPane>
<BorderPane prefHeight="106.0" prefWidth="205.0">
<center>
<Button fx:id="btn4" mnemonicParsing="false" prefHeight="51.0" prefWidth="127.0" text="Indicadores" BorderPane.alignment="CENTER" />
</center>
</BorderPane>
<BorderPane prefHeight="106.0" prefWidth="205.0" />
</children>
</VBox>
</left>
<top>
<BorderPane prefHeight="145.0" prefWidth="791.0" BorderPane.alignment="CENTER">
<left>
<Pane fx:id="imgview" prefHeight="145.0" prefWidth="205.0" BorderPane.alignment="CENTER" />
</left>
</BorderPane>
</top>
</BorderPane>
</children>
</StackPane>
its something wrong? i need some orientation here. thanks.

Answer 1

Here is an example that shows the MVC relationship in JavaFX. The button is defined in FXML and injected into the controller where it can be accessed.
TestAppView.fxml
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<VBox alignment="CENTER" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.app.TestAppController">
<Button fx:id="myButton" text="Hello World" />
</VBox>
TestAppController.java
public class TestAppController implements Initializable {
#FXML
private Button myButton;
#Override
public void initialize(URL url, ResourceBundle resources) {
// Prints Hello World & disables the button when clicked
myButton.setOnAction((e) -> {
System.out.println("Hello World");
myButton.setDisable(true);
});
}
}
TestAppMain.java
public class TestAppMain extends Application {
#Override
public void start(Stage stage) throws Exception {
FXMLLoader loader = new FXMLLoader(TestAppController.class.getResource("TestAppView.fxml"));
Parent root = loader.load();
Scene scene = new Scene(root, 200, 200);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}