JavaFx 对话框或警报未在 Mac OS X 上按预期显示

Question

参考我的这个问题fxml file not behaving as expected in OS X，我能够解决第一个问题，但我仍然面临进度条的问题。当我的应用程序窗口未最大化但当我的应用程序窗口最大化时我的进度条对话框占据整个屏幕时，它的行为很好。我的进度条代码是这样的：

public ProgressBar startProgressBar() {
        primaryStage = new Stage();
        ProgressBar pb = new ProgressBar(0);
        //ProgressIndicator pi = new ProgressIndicator(0);
        //pi.progressProperty().bind(pb.progressProperty());
        HBox hb = new HBox();
        hb.setSpacing(5);
        hb.setAlignment(Pos.CENTER);
        hb.getChildren().addAll(pb);
        Scene scene = new Scene(hb, 300, 100);
        primaryStage.setScene(scene);
        primaryStage.setTitle("Downloading Build...");
        primaryStage.show();
        return pb;
    }

我尝试过使用以下方法，但这些不起作用。

primaryStage.setFullScreen(false);
primaryStage.setMaxHeight(200);
primaryStage.setMaxWidth(400);

但这也行不通。如果我将高度和宽度固定为恒定，则对话框仅采用该高度和宽度，但背景屏幕显示为黑色。

一旦用户单击下载按钮，我就会触发进度条，这是我的下载过程代码。在进度条中，我正在比较我的下载文件大小和来自服务器的文件大小，我正在用本地目录中的文件大小更新进度条。

private void download() {
        FTPClient ftpClient = new FTPConnection().makeConnection(loc);

        try {
            ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
            success = ftpClient.changeWorkingDirectory(PATH + preset + "/" + file_to_download + offset);
            System.out.println("Download Path:-" + PATH + preset + "/" + file_to_download + offset);
            if (!success) {
                System.out.println("Could not changed the directory to RIBS");
                return;
            } else {
                System.out.println("Directory changed to RIBS");
            }
            FTPFile[] files = ftpClient.listFiles();
            for (FTPFile file : files) {
                if (file.getName().contains(".zip")) {
                    dfile = file;
                }

            }
            fileMap.put("build", dfile.getName());
            //primaryStage = (Stage) ap.getScene().getWindow();

            String homePath = System.getProperty("user.home");
                        File downloadPath;
                        if(getOS().equals("Mac"))
                        {
                           downloadPath = new File(homePath + "/file path/" + osVer);
                        }
                        else
                        {
            downloadPath = new File(homePath + "\\file path\\" + osVer);
                        }
                        if (!downloadPath.exists()) {
                if (downloadPath.mkdirs()) {
                    System.out.println("Directory is created!");
                } else {
                    System.out.println("Failed to create directory!");
                }
            }
            // System.out.println(chosenDir.getAbsolutePath());
            filePath = new File(downloadPath + "/" + dfile.getName());
            if (filePath.exists()) {
                System.out.println("File altready exist");
                JOptionPane.showMessageDialog(null, "File already exists", "InfoBox: " + "",
                        JOptionPane.INFORMATION_MESSAGE);
                return;
            } else {

                downloadFile = new File(downloadPath + "/" + dfile.getName());
                // Progress bar
                Task<Void> progress = new Task<Void>() {
                    @Override
                    protected Void call() throws Exception {
                        try {
                            for (long progress = 0; progress < dfile.getSize() ; progress = downloadFile.length()) {
                                Thread.sleep(300);
                                System.out.println(progress);
                                updateProgress(progress, dfile.getSize());

                            }
                        } catch (InterruptedException e) {
                        }
                        finally {

                        }
                        return null;
                    }
                };
                ProgressBar slider = startProgressBar();
                slider.progressProperty().bind(progress.progressProperty());

                // download task
                Task downloadTask = new Task<Void>() {
                    @Override
                    public Void call() throws IOException {
                        try {
                            long len = dfile.getSize();
                            System.out.println("File From Server:::::: " + len);

                            System.out.println("DOWNLOAD FILE:::::" + downloadFile);
                            outputFile = new FileOutputStream(downloadFile);
                        } catch (FileNotFoundException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                        ftpClient.sendNoOp();
                        ftpClient.setConnectTimeout(1000);
                        // ftpClient.retrieveFile(dfile, output);
                        if (ftpClient.retrieveFile(dfile.getName(), outputFile) == true) {
                            System.out.println("ReplyCOde:-" + ftpClient.getReplyCode());
                            downloadButton.setDisable(true);

                            try {
                                String homePath = System.getProperty("user.home");
                                Desktop.getDesktop().open(new File(homePath + "/file path"));
                                //primaryStage.hide();
                            } catch (Exception e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                            System.out.println("LOCAL FILE LENGTH:-" + downloadFile.length());
                            if (outputFile != null) {
                                try {
                                    outputFile.close();
                                    ftpClient.logout();
                                    ftpClient.disconnect();
                                } catch (IOException e) {
                                    // TODO Auto-generated catch block
                                    e.printStackTrace();
                                }
                            }
                        }
                        return null;
                    }
                };
                Thread t = new Thread(downloadTask);
                t.start();

                Thread thread = new Thread(progress);
                thread.start();
                downloadTask.setOnSucceeded(evt->primaryStage.hide());

            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            //primaryStage.hide();
        }
        return;
    }

任何对话框都具有与 Mac OS X 类似的行为。我尝试了 JavaFx 警报框，它也具有相同的行为。有什么解决办法吗？

Alert alert = new Alert(AlertType.INFORMATION);
    alert.setTitle("Information Dialog");
    alert.setHeaderText(null);
    alert.setContentText("cannot connec to server or file not present at server");

Answer 1

所描述的效果是没有所有者的对话框的一个特征。要抑制不需要的行为，请在下面的示例中为对话框指定所有者：

alert.initOwner(primaryStage);

下面的minimal example 可用于重现Mac OS X 10.11、El Capitan 上描述的效果。单击窗口左上角的绿色全屏按钮后，应用程序将展开以填满屏幕。单击 显示警报 按钮会使展开的窗口滑到一边，消失以显示警报。取消对initOwner() 的调用并重新测试。展开的窗口（蓝色）现在仍位于警报下方

没有所有者：

所有者集：

Apple suggests 两种相关解决方法之一：

• 选项-点击应用程序窗口左上角的绿色全屏按钮，按照以前版本的方式展开。

• 在 Dock 首选项窗格中选择“双击窗口的标题栏以进行缩放”后，双击标题栏。

代码：

import java.util.Optional;
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonType;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

/**
 * @see https://stackoverflow.com/a/37183801/230513
 */
public class AlertTest extends Application {

    @Override
    public void start(Stage primaryStage) {
        Button button = new Button("Show Alert");
        button.setOnAction(ae -> {
            Alert alert = new Alert(AlertType.CONFIRMATION, "Are you sure?");
            alert.initOwner(primaryStage);
            Optional<ButtonType> result = alert.showAndWait();
            if (result.isPresent() && result.get() == ButtonType.OK) {
                System.out.println("Confirmed!");
            } else {
                System.out.println("Cancelled.");
            }
        });
        StackPane root = new StackPane(button);
        root.setBackground(new Background(new BackgroundFill(
            Color.CORNFLOWERBLUE, CornerRadii.EMPTY, Insets.EMPTY)));
        Scene scene = new Scene(root, 320, 240);
        primaryStage.setTitle("Alert Test");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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