javafx FXML and Controllers Passing data to FXML - accessing existing controller
Example
Problem: Some data needs to be passed to a scene loaded from a fxml.
Solution
Specify a controller using the fx:controller attribute and get the controller instance created during the loading process from the FXMLLoader instance used to load the fxml.
Add methods for passing the data to the controller instance and handle the data in those methods.
FXML
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.text.*?>
<?import javafx.scene.layout.*?>
<VBox xmlns:fx="http://javafx.com/fxml/1" fx:controller="valuepassing.TestController">
<children>
<Text fx:id="target" />
</children>
</VBox>
Controller
package valuepassing;
import javafx.fxml.FXML;
import javafx.scene.text.Text;
public class TestController {
@FXML
private Text target;
public void setData(String data) {
target.setText(data);
}
}
Code used for loading the fxml
String data = "Hello World!";
FXMLLoader loader = new FXMLLoader(getClass().getResource("test.fxml"));
Parent root = loader.load();
TestController controller = loader.<TestController>getController();
controller.setData(data);
