Question

我正在构建一个Javafx应用程序，其中有一个用于更改密码的按钮，为此，我需要加载新的Change-password FXML。它很简单，我知道但是我的问题是在每个按钮上单击一个新的Change-password窗口打开。还是有一种方法可以在更改密码窗口失去焦点时关闭它，即，如果我单击其他任何地方。

@FXML
private void CPassBtn(ActionEvent event) {

  try 
    {
        Parent part = FXMLLoader.load(getClass().getResource("/EmpSalary/ui/Mainwin/forChangePass.fxml"));
        Stage stage = new Stage();
        stage.setResizable(false);
        stage.getIcons().add(new Image("/resources/letter.png"));
        stage.setScene(new Scene(part));

        stage.setTitle("Password change");
        stage.show();

    }
    catch (IOException ex) {
        Logger.getLogger(LoginuiController.class.getName()).log(Level.SEVERE, null, ex);
    }
}

Answer 1

并非您所描述的功能完全正确，但可能使用了模态（它可以阻止输入事件根据模态在所有者或应用程序上处理）：

stage.initModality(Modality.WINDOW_MODAL);
stage.initOwner(((Node) event.getSouce()).getScene().getWindow());
stage.show();

Answer 2

您可以使用布尔值阻止多个窗口检查是否已加载

    private boolean stageLoaded = false ;


  @FXML private void CPassBtn(ActionEvent event) {

   try 
{ 
    if(stageLoaded){ return;}
    Parent part = FXMLLoader.load(getClass().getResource("/EmpSalary/ui/Mainwin/forChangePass.fxml"));
    Stage stage = new Stage();
    stage.setResizable(false);
    stage.getIcons().add(new Image("/resources/letter.png"));
    stage.setScene(new Scene(part));

    stage.setTitle("Password change");
    stage.show();

    stageLoaded = true ;
}
catch (IOException ex) {
    Logger.getLogger(LoginuiController.class.getName()).log(Level.SEVERE, null, ex);
}
}

但是如果您需要再次设置stageLoaded = false。您需要添加一个事件stage.setOnCloseRequest

private boolean stageLoaded = false ;


   @FXML private void CPassBtn(ActionEvent event) {

   try 
{ 
if(stageLoaded){ return;}
Parent part =FXMLLoader.load(getClass().getResource("/EmpSalary/ui/Mainwin/forChangePa 
ss.fxml"));
Stage stage = new Stage();
stage.setResizable(false);
stage.getIcons().add(new Image("/resources/letter.png"));
stage.setScene(new Scene(part));

stage.setTitle("Password change");
stage.show();

stageLoaded = true ;
 stage.setOnCloseRequest((WindowEvent even) -> {
                stageLoaded = false;

}
 catch (IOException ex) {
Logger.getLogger(LoginuiController.class.getName()).log(Level.SEVERE, 
 null, ex);
 }
 }

Answer 3

我认为这正是您想要的

stage.focusedProperty().addListener(new ChangeListener<Boolean>()
{
  @Override
  public void changed(ObservableValue<? extends Boolean> b, Boolean oldValue, Boolean newValue)
  {
    if(newValue == false)
        stage.close();
  }
});

Answer 4

该解决方案检查焦点何时改变，如果平台失去焦点则关闭

public class Main extends Application {

    public static void main(String[] args) { launch(args); }

    @Override
    public void start(Stage primaryStage) {
        Button button = new Button("Password Window");

        Scene scene = new Scene(button);
        primaryStage.setScene(scene);
        primaryStage.show();

        button.setOnAction(event -> System.out.println(openPasswordWindow()));
    }

    private String openPasswordWindow(){
        PasswordField passwordField = new PasswordField();
        Stage stage = new Stage(StageStyle.UTILITY);
        stage.setScene(new Scene(passwordField));
        stage.show();

        //You would need from here 
        stage.focusedProperty().addListener((ov, onHidden, onShown) -> {
            if(!stage.isFocused())
                Platform.runLater(() -> stage.close());
        });
        //Down to here

        return passwordField.getText();
    }
}

在您的代码中，它看起来像这样

@FXML
private void CPassBtn(ActionEvent event) {

    try
    {
        Parent part = FXMLLoader.load(getClass().getResource("/EmpSalary/ui/Mainwin/forChangePass.fxml"));
        Stage stage = new Stage();
        stage.setResizable(false);
        stage.getIcons().add(new Image("/resources/letter.png"));
        stage.setScene(new Scene(part));

        stage.setTitle("Password change");
        stage.show();

        stage.focusedProperty().addListener((ov, onHidden, onShown) -> {
            if(!stage.isFocused())
                Platform.runLater(() -> stage.close());
        });
    }
    catch (IOException ex) {
        Logger.getLogger(LoginuiController.class.getName()).log(Level.SEVERE, null, ex);
    }
}

防止出现多个窗口并在失去焦点时关闭窗口JAVAFX

4 个答案: