Question

我正在创建一个对话框，并在控制器Platform.runLater()方法中调用initialize()。当我尝试使用showAndWait()打开对话框时，它会加载FXML （我知道这样做是因为警告是在Running Later和After first showAndWait）之前打印的但是没有＆＃ 39;打开对话框。只有第二次拨打showAndWait()即可打开它。有这种有线行为的原因还是这个错误？

控制台输出是：

Starting dialog creation
Running Later
After first showAndWait
Closing
After second showAndWait

但应该是：

Starting dialog creation
Init
Running Later
Closing
After first showAndWait
Closing
After second showAndWait

还有这个警告：

Apr 20, 2018 12:20:32 AM javafx.fxml.FXMLLoader$ValueElement processValue
WARNING: Loading FXML document with JavaFX API of version 9.0.1 by JavaFX runtime of version 8.0.161

但据我所知，这只意味着我的JavaFX版本已经过时了。

主要课程：

import java.io.IOException;
import java.util.List;
import java.util.Optional;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Dialog;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class Main extends Application{

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

    @Override
    public void start(Stage stage) throws Exception {
        stage.setScene(new Scene(new BorderPane()));
        stage.show();
        System.out.println("Starting dialog creation");
        Dialog<Optional<List<String>>> popup = new Dialog<>();
        FXMLLoader loader = new FXMLLoader(Main.class.getClassLoader().getResource("Dialog.fxml"));
        try {
            popup.setDialogPane(loader.load());
        } catch (IOException e) {
            e.printStackTrace();
        }
        Controller controller = loader.getController();
        controller.dialog = popup;
        popup.getDialogPane().getButtonTypes().add(ButtonType.CLOSE);
        popup.showAndWait();
        System.out.println("After first showAndWait");
        popup.showAndWait();
        System.out.println("After second showAndWait");
    }

}

控制器：

import java.net.URL;
import java.util.List;
import java.util.Optional;
import java.util.ResourceBundle;

import javafx.application.Platform;
import javafx.fxml.FXML;
import javafx.scene.control.Dialog;

public class Controller {
    @FXML
    private ResourceBundle resources;

    @FXML
    private URL location;

    public Dialog<Optional<List<String>>> dialog;

    @FXML
    void initialize() {
        System.out.println("Init");
        Platform.runLater(() -> {
            System.out.println("Running Later");
            dialog.setResult(Optional.empty());
            dialog.setOnCloseRequest(e -> {
                System.out.println("Closing");
            });
        });
    }
}

FXML：

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.DialogPane?>


<DialogPane contentText="This is a text" headerText="Test" xmlns="http://javafx.com/javafx/9.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Controller" />

初始化（）中的Platform.runLater（）

0 个答案: