如何在FXML應用程序中的主類和控制器類之間進行通信階段

Question

我想在主類和控制器類之間進行通信階段，這樣我可以使階段可以從控制器類中的代碼拖放。什麼是最有效的方法來做到這一點？

Main.java：

package sample; 
import javafx.application.Application; 
import javafx.fxml.FXMLLoader; 
import javafx.scene.Parent; 
import javafx.scene.Scene; 
import javafx.stage.Stage; 
import java.io.FileReader; 
import java.util.List; 
import java.util.Map; 

import javafx.stage.StageStyle; 
import org.json.simple.JSONArray; 
import org.json.simple.JSONObject; 
import org.json.simple.parser.JSONParser; 

public class Main extends Application { 

    public Stage stage; 
    @Override 
    public void start(Stage primaryStage) throws Exception{ 
     stage = primaryStage; 
     Parent root = FXMLLoader.load(getClass().getResource("sample.fxml")); 
     stage.initStyle(StageStyle.UNDECORATED); 
     stage.setTitle("WordToday"); 
     Scene scene = new Scene(root, 300, 200); 
     stage.setScene(scene); 
     stage.setX(5); 
     stage.show(); 

     //FileReader reader = new  FileReader("C:\\Users\\Snipester\\IdeaProjects\\WordToday\\src\\sample\\Words.json"); 
     //JSONObject jsonObj = (JSONObject) new JSONParser().parse(reader); 
     //JSONArray jsonArray = (JSONArray) jsonObj.get("Gre"); 
     //List<Map<String, String>> list = jsonArray; 
     //System.out.println(list.get(0).get("word")); 

    } 


    public static void main(String[] args) { 
     launch(args); 
    } 
} 

Controller.java：

package sample; 

import javafx.application.Platform; 
import javafx.fxml.FXML; 
import javafx.scene.control.Button; 
import javafx.scene.control.ToolBar; 
import javafx.scene.input.MouseEvent; 
import javafx.stage.Stage; 

public class Controller{ 


    public Button exitButton; 
    public ToolBar titleBar; 
    private double x, y; 


    //exit button 
    public void exitButtonClicked() { 
     Platform.exit(); 
    } 

    //mouse pressed 
    public void MouseClicked(MouseEvent event){ 
     //x = event.getSceneX(); 
     //y = event.getSceneY(); 
    } 

    //mouse dragged 
    public void MouseDragged(MouseEvent event){ 
     // stage.setX(event.getScreenX()-x); 
     //stage.setY(event.getScreenY()-y); 

    } 

} 

FXML：

<ToolBar fx:id="titleBar" 
      prefHeight="20.0" 
      prefWidth="600.0" 
      GridPane.rowIndex="0" 
      onMouseClicked="#MouseClicked" 
      onMouseDragged="#MouseDragged" 
      /> 

Answer 1

您可以在任何節點上使用getScene()和getScene().getWindow()：

//mouse pressed 
public void MouseClicked(MouseEvent event){ 
    double x = event.getSceneX(); 
    double y = event.getSceneY(); 
    Scene scene = titleBar.getScene(); 
    Window window = scene.getWindow(); 
    // etc... 
}