events - JavaFX - 为什么我的 FileChooser 允许我访问原始舞台？

Question

当我单击该按钮时，将打开一个 FileChooser。但是，例如，我可以在 FileChooser 仍处于打开状态时关闭 Original Stage，或者我仍然可以单击并切换实际窗口。检查下面的代码

My questions are :
1- How can i make the FileChooser Closes when i close the main window ?
2- How can i make the main window not clickable when the FileChooser is opened ?

package application;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.AnchorPane;
import javafx.stage.FileChooser;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.Window;

public class Main extends Application {

    @Override public void start(Stage stage) {

        stage.setTitle("Main Stage");
        stage.setWidth(500);
        stage.setHeight(500);
        stage.show();
        Button button = new Button();
        AnchorPane ap = new AnchorPane();
        Scene scene = new Scene(ap);
        ap.getChildren().addAll(button);
        stage.setScene(scene);

        button.setOnAction(new EventHandler<ActionEvent>() {
            @Override public void handle(ActionEvent e) {
                FileChooser fileChooser = new FileChooser();
                Stage stage2=new Stage();
                stage2.initOwner(stage);
                stage2.initModality(Modality.WINDOW_MODAL);
                fileChooser.showOpenDialog(stage2);  
           }
       });  
    }

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

Answer 1

根据JavaDocs

If the owner window for the file dialog is set, input to all windows in the dialog's owner chain is blocked while the file dialog is being shown.

但是，您将所有者窗口设置为不在屏幕上的窗口，所以我认为在这种情况下不存在“所有者链”，并且文件选择器实际上不是模态的。

为什么不做

    button.setOnAction(new EventHandler<ActionEvent>() {
        @Override public void handle(ActionEvent e) {
            FileChooser fileChooser = new FileChooser();
            fileChooser.showOpenDialog(stage); 
       }
   });

以便将文件选择器的所有者窗口设为实际窗口？