嘿,我搜索了一段时间,但我找不到解决以下问题的方法：
在javafx中有3个基本文件;控制器类,fxml文件和应用程序类.现在我想在控制器中做出一个按钮点击(其工作得很好)并更改该点击屏幕(通常使用stage.setScreen()),但我没有参考舞台(你可以在应用程序类中找到).
应用程序示例：
public class JavaFXApplication4 extends Application {
@Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("Sample.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
/**
* The main() method is ignored in correctly deployed JavaFX application.
* main() serves only as fallback in case the application can not be
* launched through deployment artifacts,e.g.,in IDEs with limited FX
* support. NetBeans ignores main().
*
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
FXML-样品：
<?xml version="1.0" encoding="UTF-8"?> <?import java.lang.*?> <?import java.util.*?> <?import javafx.scene.*?> <?import javafx.scene.control.*?> <?import javafx.scene.layout.*?> <AnchorPane id="AnchorPane" prefheight="200.0" prefWidth="320.0" xmlns:fx="http://javafx.com/fxml" fx:controller="javafxapplication4.SampleController"> <children> <Button id="button" fx:id="nextScreen" layoutX="126.0" layoutY="90.0" onAction="#handleButtonAction" text="Next Screen" /> <Label fx:id="label" layoutX="126.0" layoutY="120.0" minHeight="16.0" minWidth="69.0" /> </children> </AnchorPane>
控制器 – 示例：
public class SampleController implements Initializable {
@FXML
private Label label;
@FXML
private void handleButtonAction(ActionEvent event) {
System.out.println("You clicked me!");
label.setText("Hello World!");
//Here I want to swap the screen!
}
@Override
public void initialize(URL url,ResourceBundle rb) {
// Todo
}
}
我会感谢任何一种帮助.
解决方法
@FXML
private void handleButtonAction(ActionEvent event) {
System.out.println("You clicked me!");
label.setText("Hello World!");
//Here I want to swap the screen!
Stage stageTheEventSourceNodeBelongs = (Stage) ((Node)event.getSource()).getScene().getwindow();
// OR
Stage stageTheLabelBelongs = (Stage) label.getScene().getwindow();
// these two of them return the same stage
// Swap screen
stage.setScene(new Scene(new Pane()));
}