[英]ProgressBar doesn't work with a fxml file and a controller
So I used this link to set up my progress bar and it worked perfectly fine when I ran this code. 因此,我使用此链接来设置进度条,并且在运行此代码时效果很好。
However, with the setup that I have, I can't seem to get the progressbar to actually update... progressBar.getProgress() actually gets the right progress but the UI isn't updated. 但是,使用我拥有的设置,我似乎无法获得progressbar进行实际更新... progressBar.getProgress()实际上获得了正确的进度,但是UI没有更新。 Here's the code so far:
到目前为止的代码如下:
Main.java Main.java
public class Main extends Application {
@Override
public void start(Stage primaryStage) {
try {
FXMLLoader loader = new FXMLLoader(Main.class.getResource("ProgressBarLayout.fxml"));
AnchorPane root = (AnchorPane) loader.load();
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}
ProgressBarController.java ProgressBarController.java
public class ProgressBarController {
private Task copyWorker;
@FXML
private ProgressBar progressBar;
@FXML
private void onButtonClick() {
progressBar = new ProgressBar(0);
progressBar.setProgress(0);
copyWorker = createWorker();
progressBar.progressProperty().unbind();
progressBar.progressProperty().bind(copyWorker.progressProperty());
new Thread(copyWorker).start();
}
public Task createWorker() {
return new Task() {
@Override
protected Object call() throws Exception {
for (int i = 0; i < 10; i++) {
Thread.sleep(2000);
updateMessage("2000 milliseconds");
updateProgress(i + 1, 10);
System.out.println(progressBar.getProgress());
}
return true;
}
};
}
}
ProgressBarLayout.fxml ProgressBarLayout.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane prefHeight="257.0" prefWidth="434.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.ProgressBarController">
<children>
<ProgressBar fx:id="progressBar" layoutX="54.0" layoutY="103.0" prefHeight="51.0" prefWidth="326.0" progress="0.0" />
<Button layoutX="201.0" layoutY="182.0" mnemonicParsing="false" onAction="#onButtonClick" text="OK" />
</children>
</AnchorPane>
in your controller you do : 在您的控制器中,您可以执行以下操作:
progressBar = new ProgressBar(0);
this mean it will create a new instance of ProgressBar and it will not use your progressBar from your FXML anymore. 这意味着它将创建一个ProgressBar的新实例,并且不再使用FXML中的progressBar。 Just remove this line, it should works
只需删除此行,它应该可以工作
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