如何配置javaFx的进度条和进度指示器？ [英] How to configure Progress Bar and Progress Indicator of javaFx?

问题描述

我正在尝试在进度条上添加滑块。但我的代码运行不正常。

I am trying to add a slider on my page like progress bar. But my code is not working well.

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。 br>
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。

My task is when I am going to copy something from one location to another I want to display a progress bar on my page.
So in javaFx I wrote following task but it is not working well. That code runs but I want show the work in percentage like 30%, 50% and "finish". But my code fails to gives me like requirement so please help me.

我的代码是：

1。进度条和进度指示器声明

1.Declaration of progress bar and progress indicator

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

2.单击复制按钮时分配值。

2.Assign values when I click on copy button.

@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 !!!");
    }
}

此代码仅显示10％完成直接显示完成，但我希望整个过程的百分比如10,20,30，...等然后完成。

This code shows me only 10% completion an then directly shows "done", but I want whole process in percentage like 10,20,30,.. etc and then "done".

我的复制代码：

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);
            }
        }
    }
}

推荐答案

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。

Try this code. It will give you Progress bar with progress indicator which depends on the slider control.

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);
    }
}

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