Question

我创建了一个简单的应用程序来模拟使用JAVAFX创建动态节点。此应用程序可以通过单击“新建”按钮随时创建新窗口。用户可以通过单击“添加任务”按钮，然后单击对话框窗口上的“添加”按钮，将新节点TitledPane添加到窗口中。

我想解决一个意想不到的行为。此应用程序仅向最后创建的窗口添加新节点（在本例中为TitledPane）。并且前一个窗口上的所有节点都将消失。

您可以看到以下视频，以便更好地了解我的意思。

视频

https://youtu.be/eaWmu3zuuhE

NETBEANS PROJECT

以防你想玩它。

https://drive.google.com/file/d/0B4Sbb8Ym-lcZLUIyWHV5ZXRSZE0/view?usp=sharing

CODES

TasksList.java

package taskslist;


import javafx.application.Application;
import javafx.scene.Parent;
import javafx.stage.Stage;

public class TasksList extends Application {

    DisplayWhich display = new DisplayWhich();
    Stage primaryStage;
    Parent startWindow;

    @Override
    public void start(Stage primaryStage) throws Exception {
        this.primaryStage = primaryStage;
        initStart();
    }

    private void initStart(){  
             display.showDialogWindow();
    }   

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

}

TheList.java

package taskslist.view;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.TextField;
import javafx.scene.control.TitledPane;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Modality;
import javafx.stage.Stage;
import taskslist.DisplayWhich;

public class TheList extends BorderPane {
    public static VBox listWrapper;
    public static ScrollPane listScroller;
    public ObservableList<TitledPane> tasks;
    private List<String> titles = new ArrayList<>();

    public TheList(){
        tasks = FXCollections.observableArrayList();
        listWrapper = new VBox(5);
        listScroller = new ScrollPane(listWrapper);  
    }

    public void setTitles(String... title){
        titles = Arrays.asList(title);
    }

    public List<String> getTitles(){
        return titles;
    }

    public void loadSavedList(){                                                  
        for(int i=0; i<getTitles().size();i++){ 
            String ttlString = getTitles().get(i);
            this.createTask(ttlString);            
        }        
        // Display Tasks
        listWrapper.getChildren().addAll(this.tasks);
    }

    // Dialong for adding a new task and also editing a task
    private void addTaskDialog(){        
        GridPane container = new GridPane();
        Scene scene = new Scene(container, 150, 50);
        Stage addNewTask = new Stage();
        addNewTask.initModality(Modality.APPLICATION_MODAL);
        addNewTask.setTitle("Add Task");  

        TextField title = new TextField();                                                                                        

        Button confirm = new Button("Add");                                                      

        // Create Task
        confirm.setOnAction((ev) -> {
            String ttlString = title.getText();                   
            this.createTask(ttlString);             
            listWrapper.getChildren().clear();
            listWrapper.getChildren().addAll(this.tasks);           
            addNewTask.close();                     
        }); 

        container.add(title, 0, 1);       
        container.add(confirm, 0, 5);  

        addNewTask.setScene(scene);
        addNewTask.showAndWait();
    }


    // Assemble all this.tasks list components
    public void render(){       
        setCenter(listScroller);
        loadSavedList();
        Button newProject = new Button("New");                                                                    
        Button addTask = new Button("Add Task");

        BorderPane listBottom = new BorderPane();
        HBox bottomLeft = new HBox();
        bottomLeft.getChildren().add(newProject);
        listBottom.setLeft(bottomLeft);                
        HBox bottomRight = new HBox();
        bottomRight.getChildren().add(addTask);
        listBottom.setRight(bottomRight);  

        newProject.setOnAction((evt) -> {
            DisplayWhich display = new DisplayWhich();
            display.showDialogWindow();
        });

        addTask.setOnAction((e) -> {
            addTaskDialog();
        });    

        setBottom(listBottom);
    }

    // Cteate task from strings
    private void createTask(String... strings){
        String taskTitle = strings.length > 0 ? strings[0] : "";
        TitledPane task = new TitledPane();
        task.setPrefWidth(647);
        task.setExpanded(false);
        task.setText(taskTitle);        
        this.tasks.add(task);            
    }    
}

NewDialog.java

package taskslist.view;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.Parent;
import javafx.scene.control.Button;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
import taskslist.DisplayWhich;

public class NewDialog {
    DisplayWhich display = new DisplayWhich();
    Stage stage = new Stage();
    Parent startWindow = new AnchorPane();

    @FXML
    private Button cancelNew;
    @FXML
    private Button confirmCreation;
    /**
     * Initializes the controller class.
     */
    @FXML
    private void initialize() {
    }  

    @FXML
    private void cancelNewCreation(ActionEvent event) {
       ((Stage)cancelNew.getScene().getWindow()).close();
    }

    @FXML
    private void confirmCreateNew(ActionEvent event) {
        ((Stage)confirmCreation.getScene().getWindow()).close();        
        TheList wrap = new TheList();
        TheWindow window = new TheWindow();
        window.makeWindow(wrap); 
        wrap.setTitles("one", "two", "three", "four");
        wrap.render();
    }          
}

DisplayWhich.java

package taskslist;

import java.io.IOException;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Modality;
import javafx.stage.Stage;
import taskslist.view.TheList;

public class DisplayWhich {
    Stage stage = new Stage();
    Parent startWindow = new AnchorPane(); 

    public DisplayWhich(){}

    public Stage showDialogWindow(){ 
        try {
            stage.initModality(Modality.APPLICATION_MODAL);
            stage.setTitle("Create New Project");
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(getClass().getResource("/taskslist/view/newDialog.fxml"));        
            startWindow = loader.load();            
            Scene scene = new Scene(startWindow);            
            stage.setScene(scene);
            stage.setOnCloseRequest((event) -> {
                System.out.println("test");
            });
            stage.showAndWait();
        } catch (IOException ex) {
            ex.printStackTrace();
        }   
        return stage;
    }
}

TheWindow.java

package taskslist.view;

import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class TheWindow {
    public TheWindow(){}

    public void makeWindow(BorderPane group) {
        Stage mainWindow = new Stage();
        Scene scene = new Scene(group, 650, 550);
        mainWindow.setScene(scene);
        mainWindow.setTitle("Task List");
        mainWindow.centerOnScreen();        
        mainWindow.show();
    }    
}

为什么会发生这种奇怪的行为以及如何解决这个问题所以它只会将新节点添加到点击“添加任务”按钮所在的同一窗口？

Answer 1

这些字段不应该是静态的：

public static VBox listWrapper;
public static ScrollPane listScroller;

JavaFX - 向父级

1 个答案: