使用JavaFX UI控件的ProgressIndicator时，如何避免显示百分比值 [英] How can I avoid the display of percentage values, when using the ProgressIndicator of JavaFX UI Controls

问题描述

我对Java很陌生，想要摆脱Java FX中显示的ProgressIndicator百分比值。是否有禁用值显示的方法？我检查了文档，但是据我所知，无法找到正确的方法。
感谢您的帮助!!

I am pretty new to Java and would like get rid of the displayed percentage value of the ProgressIndicator in Java FX. Is there a method to disable the value display? I checked the documentation, but as far as I understand it and couldn't find the right method. Thank you for your help!!

推荐答案

编辑文本值

由于用于显示进度值的 Text 节点隐藏在 ProgressIndicatorSkin中的内部类中类，访问它的最佳方法是使用查找，尝试通过其样式百分比查找此节点。

Since the Text node used for displaying the progress value is hidden in an inner class within the ProgressIndicatorSkin class, the best way to access it is using lookups, trying to find this node by its styleclass percentage.

此代码段只会删除％字符。

This snippet will just remove the % character.

private Text lookup;

@Override
public void start(Stage primaryStage) {
    final Group root = new Group();
    final ProgressIndicator indicator = new ProgressIndicator();

    root.getChildren().add( indicator );
    final Scene scene = new Scene( root );

    final Task<Void> task = new Task<Void>() {
        @Override
        protected Void call() throws Exception {

            IntStream.range(0, 1000).forEach( i ->{
                updateProgress( i, 1000 );
                try{ Thread.sleep(10); } catch(InterruptedException ie){}
            });

            return null;
        }
    };

    indicator.progressProperty().bind( task.progressProperty() );
    new Thread( task ).start();

    primaryStage.setTitle("Hello World!");
    primaryStage.setScene(scene);
    primaryStage.show();

    indicator.progressProperty().addListener((obs,n,n1)->{
        if(lookup==null){
            lookup= (Text)root.lookup(".percentage");
        }
        lookup.setText(lookup.getText().replace("%", ""));
    });         
}

删除文字值

完全不同的问题是摆脱 Text 节点。

A complete different problem is getting rid of the Text node.

有一个名为 doneText 的静态 Text

仅用于了解已完成的大小，因为这是我们需要允许的最大文本

is just used to know the size of done as that is the biggest text we need to allow for

因此对 lookup 节点的任何更改都不会影响整个控件的边界框。

So any change to the lookup node won't affect the bounding box of the whole control.

此外，鉴于 Text 节点是 Region 的子节点，子项列表不可修改。

What's more, given that the Text node is child of a Region, the children list is not modificable.

因此，我提出的解决方法就是剪切指标。

So the workaround I've come up with is just clipping the indicator.

private Text lookup;
@Override
public void start(Stage primaryStage) {
    final VBox root = new VBox();

    final ProgressIndicator indicator = new ProgressIndicator();
    root.getChildren().addAll( new Group(indicator), new Button("Some Button") );
    final Scene scene = new Scene( root );

    final Task<Void> task = new Task<Void>() {
        @Override
        protected Void call() throws Exception {

            IntStream.range(0, 1_000).forEach( i ->{
                updateProgress( i, 1_000 );
                try{ Thread.sleep(10); } catch(InterruptedException ie){}
            });

            return null;
        }
    };

    indicator.widthProperty().addListener((obs,d,d1)->{
        if(d.doubleValue()>0){
            // Clip the indicator
            Rectangle clip=new Rectangle(d1.doubleValue(),d1.doubleValue());
            indicator.setClip(clip);
        }
    });
    indicator.progressProperty().bind( task.progressProperty() );

    primaryStage.setTitle("Hello World!");
    primaryStage.setScene(scene);
    primaryStage.show();
    new Thread( task ).start();

}

现在我们可以正确布局其他控件。

Now we can layout other controls properly.

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