【发布时间】：2015-11-08 09:47:27
【问题描述】：
我想更改进度指示器下的文本。默认情况下，当 ProgressIndicator 完成其进度时，文本已完成，我希望能够使用任何用户定义的文本或取决于区域设置的文本来编辑此文本。
当我运行程序输出显示文本已更改，但在 GUI 上它没有更改。请看以下图片：
MCVE
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.concurrent.Task;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.stage.Stage;
public class Main extends Application {
Task copyWorker;
public static void main(String[] args) {
Application.launch(args);
}
@Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Background Processes");
Group root = new Group();
Scene scene = new Scene(root, 330, 120, Color.WHITE);
BorderPane mainPane = new BorderPane();
root.getChildren().add(mainPane);
final Label label = new Label("Files Transfer:");
final ProgressIndicator progressIndicator = new ProgressIndicator(0);
progressIndicator.progressProperty().addListener(new ChangeListener<Number>() {
@Override
public void changed(ObservableValue<? extends Number> ov, Number t, Number newValue) {
progressIndicator .applyCss();
// If progress is 100% then show Text
if (newValue.doubleValue() >= 1.0) {
// Apply CSS so you can lookup the text
Text text = (Text) progressIndicator .lookup(".percentage");//also I checked .lookup(.text.percentage) version
System.out.println(text.getText());
// This text replaces "Done"
text.setText("some text");
//for testing
Text x= (Text) progressIndicator .lookup(".percentage");
System.out.println(x.getText());//output shows that the text under progress indicator is changed
}
}});
final HBox hb = new HBox();
hb.setSpacing(5);
hb.setAlignment(Pos.CENTER);
hb.getChildren().addAll(label, progressIndicator);
mainPane.setTop(hb);
final Button startButton = new Button("Start");
final Button cancelButton = new Button("Cancel");
final HBox hb2 = new HBox();
hb2.setSpacing(5);
hb2.setAlignment(Pos.CENTER);
hb2.getChildren().addAll(startButton, cancelButton);
mainPane.setBottom(hb2);
startButton.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent event) {
startButton.setDisable(true);
progressIndicator.setProgress(0);
cancelButton.setDisable(false);
copyWorker = createWorker();
progressIndicator.progressProperty().unbind();
progressIndicator.progressProperty().bind(copyWorker.progressProperty());
copyWorker.messageProperty().addListener(new ChangeListener<String>() {
public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
System.out.println(newValue);
}
});
new Thread(copyWorker).start();
}
});
cancelButton.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent event) {
startButton.setDisable(false);
cancelButton.setDisable(true);
copyWorker.cancel(true);
progressIndicator.progressProperty().unbind();
progressIndicator.setProgress(0);
System.out.println("cancelled.");
}
});
primaryStage.setScene(scene);
primaryStage.show();
}
public Task createWorker() {
return new Task() {
@Override
protected Object call() throws Exception {
for (int i = 0; i < 10; i++) {
Thread.sleep(100);
updateMessage("100 milliseconds");
updateProgress(i + 1, 10);
}
return true;
}
};
}
}
【问题讨论】：
-
你能添加你尝试过的代码吗，如果可以的话请发一个Minimal, Complete, and Verifiable example。
-
我为什么要这样做？如果您需要帮助，您必须珍惜前来帮助您的人所付出的时间和精力。
标签： java javafx nsprogressindicator