如何配置javaFx的进度条和进度指示器?

时间:2013-06-14 13:17:34

标签: java javafx progress-bar

我正在尝试在进度条上添加滑块。但我的代码效果不佳。

我的任务是当我要将某个地方的东西复制到另一个地方时我想在我的页面上显示一个进度条。
所以在javaFx中我编写了以下任务,但它运行不正常。该代码运行但我希望以百分比显示工作,如30%,50%和“完成”。但是我的代码没有给我这样的要求所以请帮助我。

我的代码是:

1.进度条和进度指示器的声明

@FXML
final ProgressBar progressBar = new ProgressBar();
@FXML
final ProgressIndicator progressIndicator = new ProgressIndicator();

2.单击复制按钮时分配值。

@FXML
private void handleOnClickButtonAction(MouseEvent event) {
    if (fromLabel.getText().isEmpty()
            || toLabel.getText().isEmpty()
            || fromLabel.getText().equalsIgnoreCase("No Directory Selected")
            || toLabel.getText().equalsIgnoreCase("No Directory Selected")) {
        // Nothing
    } else {
        progressBar.setProgress(0.1f);
        progressIndicator.setProgress(progressBar.getProgress());
        this.directoryCount.setText("Please Wait !!!");
    }
}

这段代码显示我只有10%完成然后直接显示“完成”,但我希望整个过程的百分比如10,20,30,...等然后“完成”。


我的副本代码:

double i = 1;
while (rst.next()) {
    File srcDirFile = new File(fromLabel.getText() + "/" + rst.getString("nugget_media_files"));
    File dstDirFile = new File(toLabel.getText() + "/" + rst.getString("nugget_media_files"));
    File dstDir = new File(toLabel.getText() + "/" + rst.getString("nugget_directory"));
    if (srcDirFile.lastModified() > dstDirFile.lastModified()
            || srcDirFile.length() != dstDirFile.length()) {
        copyDirectory(srcDirFile, dstDirFile, dstDir);
    }

    this.currentNuggetCount = i / this.nuggetFolderSize;

    System.out.println("Nugget Count : " + this.currentNuggetCount);

    Platform.runLater(new Runnable() {
        @Override
        public void run() {
            progressBar.setProgress(1.0f);
            progressIndicator.setProgress(progressBar.getProgress());
        }
    });

    ++i;
}

这是copyDirectory方法:

private static void copyDirectory(File srcDir, File dstDir,File destNugget) {
    System.out.println(srcDir+" >> "+dstDir);
    if(!destNugget.exists()) {
        destNugget.mkdirs();
    }

    if (srcDir.isDirectory()) {
        if (!dstDir.exists()) {
            dstDir.mkdirs();
        }

        String[] children = srcDir.list();
        for (int i=0; i<children.length; i++) {
            copyDirectory(new File(srcDir, children[i]),
                          new File(dstDir, children[i]),
                          destNugget);
        }
    } else {
        InputStream in = null;
        try {
            in = new FileInputStream(srcDir);
            OutputStream out = new FileOutputStream(dstDir);
            byte[] buf = new byte[1024];
            int len;
            while ((len = in.read(buf)) > 0) {
                out.write(buf, 0, len);
            }
            in.close();
            out.close();
        } catch (IOException ex) {
            System.out.println("Exceptio "+ex);
        } finally {
            try {
                in.close();
            } catch (IOException ex) {
                System.out.println("Exceptio "+ex);
            }
        }
    }
}

2 个答案:

答案 0 :(得分:0)

您必须在任务中输入代码并在UpdateProgress方法中设置。在运行Task之前,您必须设置progressBar.progressProperty()。绑定(task.progressProperty());

这是一个例子: TaskTest

答案 1 :(得分:0)

试试这段代码。它将为您提供带有进度指示器的进度条,该进度条取决于滑块控件。

public class Main  extends Application {

    @Override
    public void start(Stage stage) {
        Group root = new Group();
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.setTitle("Progress Controls");

        final Slider slider = new Slider();
        slider.setMin(0);
        slider.setMax(50);

        final ProgressBar pb = new ProgressBar(0);
        final ProgressIndicator pi = new ProgressIndicator(0);

        slider.valueProperty().addListener(new ChangeListener<Number>() {
            public void changed(ObservableValue<? extends Number> ov,
                Number old_val, Number new_val) {
                pb.setProgress(new_val.doubleValue()/50);
                pi.setProgress(new_val.doubleValue()/50);
            }
        });

        final HBox hb = new HBox();
        hb.setSpacing(5);
        hb.setAlignment(Pos.CENTER);
        hb.getChildren().addAll(slider, pb, pi);
        scene.setRoot(hb);
        stage.show();
    }
    public static void main(String[] args) {
        launch(args);
    }
}