intellij-idea - 显示 FileChooser 对话框时为 "java[934:22850] +[CATransaction synchronize] called within transaction"

Question

在使用 IntelliJ Community Edition 2021.2 运行 Java 程序时，当显示 FileChooser 对话框时，我看到控制台输出“java[934:22850] +[CATransaction synchronize] called within transaction”。该对话框似乎工作正常，但我对消息感到困惑。

MacOS 13.0.1(文图拉)； IntelliJ 社区版 2021.2； JDK 15.0.2； JavaFX 15.0.1+1

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.VBox;
import javafx.stage.FileChooser;
import javafx.stage.Stage;

import java.io.*;

public class Main extends Application {

    // ..................... and now it's time for the main routine .....................

    @Override
    public void start(Stage primaryStage) {

        // we need a FileChooser
        FileChooser myChooser = new FileChooser();

        // set up a controlled exit
        primaryStage.setOnCloseRequest(e -> {
            e.consume();
            primaryStage.close();
        });

        // define the main scene's building blocks
        VBox root = new VBox(5); // the spacing is between each element in the VBox
        Scene mainScene = new Scene(root, 650, 300);

        // just one button in the scene
        Button websiteSupportButton = new Button("Process file");
        websiteSupportButton.setMinWidth(150);
        root.getChildren().add(websiteSupportButton);
        websiteSupportButton.setOnAction(e -> processFiles(primaryStage, myChooser));

        // and now we're ready to associate the root Scene with the primary stage, and show it
        primaryStage.setX(20);
        primaryStage.setY(20);
        primaryStage.setScene(mainScene);
        primaryStage.setTitle("Error test");
        primaryStage.show();
    }

    // .................................. tool scenes ..................................

    // stuff moved from WebsiteSupport, and severely cut down - select an input file.
    private static void processFiles(Stage myStage, FileChooser myChooser) {
        File inputFile;

        // need to select an input file - displaying this dialog causes multiple "java[1334:69043] +[CATransaction synchronize] called within transaction" messages
        inputFile = myChooser.showOpenDialog(myStage);
        if (inputFile != null) {
            System.out.println(" file processed");
        }
    }

    // .......................................... standard stuff ..........................................

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

Answer 1

我试过你的代码:

• OS X(英特尔)13.0.1
• JavaFX 19
• OpenJDK 19.0.1

它收到了相同的错误消息(一次调用多次):

java[34308:361725] +[CATransaction synchronize] called within transaction  

我相信每次在此配置中调用文件选择器 showOpenDialog 方法时都会发生这种情况。复制执行问题的最小示例是:

import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.stage.FileChooser;
import javafx.stage.Stage;

public class FileChooserCATransactionLogGeneratorApp extends Application {
    @Override
    public void start(Stage stage) {
        stage.setScene(new Scene(new Group()));
        stage.show();

        FileChooser myChooser = new FileChooser();
        myChooser.showOpenDialog(stage);
    }

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

我建议提交 bug report .

如果您确实提交了错误报告并生成了错误 ID，您可以将错误报告的链接添加为对此答案的评论或编辑。