如何通过弹出窗口显示进度条并在进程完成后自动关闭。这是我的代码。
Task<ProgressForm> task = new Task<ProgressForm>() {
@Override
public ProgressForm call() throws InterruptedException{
ProgressForm pf = new ProgressForm();
for (int i = 1; i <= 10; i++) {
pf.activateProgressBar(this);
updateProgress(i, 10);
}
return pf;
}
};
task.setOnSucceeded(new EventHandler<WorkerStateEvent>() {
@Override
public void handle(WorkerStateEvent t) {
ProgressForm pf = (ProgressForm)task.getValue();
pf.getDialogStage().close();
}
});
Thread th = new Thread(task);
th.run();
课程进度表:
private final Stage dialogStage;
private final ProgressBar pb = new ProgressBar();
private final ProgressIndicator pin = new ProgressIndicator();
public ProgressForm() {
dialogStage = new Stage();
dialogStage.initStyle(StageStyle.UTILITY);
dialogStage.setResizable(false);
dialogStage.initModality(Modality.APPLICATION_MODAL);
// PROGRESS BAR
final Label label = new Label();
label.setText("alerto");
pb.setProgress(-1F);
pin.setProgress(-1F);
final HBox hb = new HBox();
hb.setSpacing(5);
hb.setAlignment(Pos.CENTER);
hb.getChildren().addAll(pb, pin);
Scene scene = new Scene(hb);
dialogStage.setScene(scene);
}
public void activateProgressBar(final Task task) throws InterruptedException {
pb.progressProperty().bind(task.progressProperty());
pin.progressProperty().bind(task.progressProperty());
dialogStage.show();
}
public Stage getDialogStage() {
return dialogStage;
}
这段代码的问题是
对此有什么想法/想法吗?
JavaFX 中多线程的两条规则是:
Stage
或更改属性
属于场景图一部分的节点)必须在
JavaFX 应用程序线程。违反此规则将抛出
IllegalStateException
或导致不可预测的行为。您的代码违反了第一条规则,因为它在后台线程中调用
ProgressForm
构造函数。您应该先设置 UI,显示对话框,然后启动后台线程。
注意,不需要将进度条和指示器的
progress
属性重复绑定到任务的 progress
属性。一旦绑定,它将一直保持绑定状态,直到您解除绑定为止。
修复你的代码是相当困难的,因为你的后台任务实际上并没有做任何需要时间的事情。这是您暂停后正在做的事情的一个版本:
import javafx.application.Application;
import javafx.concurrent.Task;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressBar;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class ProgressDialogExample extends Application {
@Override
public void start(Stage primaryStage) {
Button startButton = new Button("Start");
startButton.setOnAction(e -> {
ProgressForm pForm = new ProgressForm();
// In real life this task would do something useful and return
// some meaningful result:
Task<Void> task = new Task<Void>() {
@Override
public Void call() throws InterruptedException {
for (int i = 0; i < 10; i++) {
updateProgress(i, 10);
Thread.sleep(200);
}
updateProgress(10, 10);
return null ;
}
};
// binds progress of progress bars to progress of task:
pForm.activateProgressBar(task);
// in real life this method would get the result of the task
// and update the UI based on its value:
task.setOnSucceeded(event -> {
pForm.getDialogStage().close();
startButton.setDisable(false);
});
startButton.setDisable(true);
pForm.getDialogStage().show();
Thread thread = new Thread(task);
thread.start();
});
StackPane root = new StackPane(startButton);
Scene scene = new Scene(root, 350, 75);
primaryStage.setScene(scene);
primaryStage.show();
}
public static class ProgressForm {
private final Stage dialogStage;
private final ProgressBar pb = new ProgressBar();
private final ProgressIndicator pin = new ProgressIndicator();
public ProgressForm() {
dialogStage = new Stage();
dialogStage.initStyle(StageStyle.UTILITY);
dialogStage.setResizable(false);
dialogStage.initModality(Modality.APPLICATION_MODAL);
// PROGRESS BAR
final Label label = new Label();
label.setText("alerto");
pb.setProgress(-1F);
pin.setProgress(-1F);
final HBox hb = new HBox();
hb.setSpacing(5);
hb.setAlignment(Pos.CENTER);
hb.getChildren().addAll(pb, pin);
Scene scene = new Scene(hb);
dialogStage.setScene(scene);
}
public void activateProgressBar(final Task<?> task) {
pb.progressProperty().bind(task.progressProperty());
pin.progressProperty().bind(task.progressProperty());
dialogStage.show();
}
public Stage getDialogStage() {
return dialogStage;
}
}
public static void main(String[] args) {
launch(args);
}
}
您可以使用controlsfx库来轻松显示它
private void progressDialogue(){
copyWorker = createWorker();
ProgressDialog dialog = new ProgressDialog(copyWorker);
dialog.initStyle(StageStyle.TRANSPARENT);
dialog.setGraphic(null);
//stage.initStyle(StageStyle.TRANSPARENT);
dialog.initStyle(StageStyle.TRANSPARENT);
//dialog.setContentText("Files are Uploading");
//dialog.setTitle("Files Uploading");
//dialog.setHeaderText("This is demo");
dialog.setHeaderText(null);
dialog.setGraphic(null);
dialog.initStyle(StageStyle.UTILITY);
new Thread(copyWorker).start();
dialog.showAndWait();
}
public Task createWorker() {
return new Task() {
@Override
protected Object call() throws Exception {
for (int i = 0; i < 10; i++) {
Thread.sleep(100);
updateMessage("2000 milliseconds");
updateProgress(i + 1, 10);
}
return true;
}
};
}
现在你需要调用方法progressDialogue();
Bonjour vous pouvez utiliser,马尔凯 `公共类 Chargement 实现了可初始化 { @FXML 公共进度指示器 Myprogessbar;
@FXML
public AnchorPane changer;
@FXML
private Label label;
public void initialize(URL arg0, ResourceBundle arg1) {
try {
// animation qui fait passer la valeur du ProgressIndicator de 0 à 1 en une seconde
Timeline timeline = new Timeline();
timeline.getKeyFrames().add(new KeyFrame(Duration.seconds(5), new KeyValue(Myprogessbar.progressProperty(), 1)));
timeline.setCycleCount(1);
timeline.play();
timeline.setOnFinished(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent arg0) {
label.setText(" ");
Stage stage = new Stage();
changer.getScene().getWindow().hide();
}
});
} catch (Exception e) {
e.printStackTrace();
}
} } `
} }
您在经典中的应用程序