JavaFx：TreeViewでTreeItemをもう一度追加

Question

私は[1]：JavaFx: Adding treeItem in Treeviewの前にこの質問をしましたが、何の応答も得られませんでした。私はこの問題について助けが必要です。

ユーザーがツリー項目を追加する必要のあるツリービュー。ここに私のコードがある

import javafx.application.Application; 
import javafx.beans.value.ChangeListener; 
import javafx.beans.value.ObservableValue; 
import javafx.event.ActionEvent; 
import javafx.event.EventHandler; 
import javafx.geometry.Insets; 
import javafx.geometry.Pos; 
import javafx.scene.Scene; 
import javafx.scene.control.ContextMenu; 
import javafx.scene.control.Label; 
import javafx.scene.control.MenuItem; 
import javafx.scene.control.TextField; 
import javafx.scene.control.TreeCell; 
import javafx.scene.control.TreeItem; 
import javafx.scene.control.TreeView; 
import javafx.scene.control.cell.TextFieldTreeCell; 
import javafx.scene.input.KeyEvent; 
import javafx.scene.layout.BorderPane; 
import javafx.scene.layout.HBox; 
import javafx.scene.layout.VBox; 
import javafx.scene.paint.Color; 
import javafx.scene.shape.Rectangle; 
import javafx.stage.Stage; 
import javafx.util.Callback; 

public class Main extends Application 
{ 

    private BorderPane border; 
    @SuppressWarnings("unchecked") 
    @Override 
    public void start(Stage primaryStage) 
    { 
     border = new BorderPane();  
     Scene scene = new Scene(border,600,300); 
     primaryStage.setTitle("BorderPane"); 
     primaryStage.setScene(scene); 
     primaryStage.show(); 

     TreeItem<String> tree = new TreeItem<String>("Main System"); 
     TreeItem<String> item2 = new TreeItem<String>("Roots"); 
     TreeItem<String> item2Child1 = new TreeItem<String>("UX"); 
     TreeItem<String> item2Child2 = new TreeItem<String>("UY"); 
     item2.getChildren().addAll(item2Child1,item2Child2);   
     item2.setExpanded(true);  

     tree.setExpanded(true); 
     tree.getChildren().add(item2); 
     TreeView<String> treeView = new TreeView<String>(tree);  

     treeView.setCellFactory(new Callback<TreeView<String>,TreeCell<String>>(){ 
      @Override 
      public TreeCell<String> call(TreeView<String> p) { 
       return new AddMenuTreeCell(); 
      } 
     }); 


     VBox box3 = new VBox(); 
     treeView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<TreeItem>() { 

      @Override 
      public void changed(ObservableValue<? extends TreeItem> observable, TreeItem oldValue, TreeItem newValue) { 
       if (newValue.getValue().equals(item2Child1.getValue())) { 
        box3.getChildren().add(getrightPane1()); 
       } else { 
        int i = box3.getChildren().size(); 
        if (i > 0) { 
         box3.getChildren().remove(0); 
        } 
       } 
      } 
     }); 

     VBox box4 = new VBox(); 
     treeView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<TreeItem>() { 

      @Override 
      public void changed(ObservableValue<? extends TreeItem> observable, TreeItem oldValue, TreeItem newValue) { 
       if (newValue.getValue().equals(item2Child2.getValue())) { 
        box4.getChildren().add(getrightPane2()); 
       } else { 
        int i = box4.getChildren().size(); 
        if (i > 0) { 
         box4.getChildren().remove(0); 
        } 
       } 
      } 
     }); 

     VBox box2 = new VBox(); 
     treeView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<TreeItem>() { 

      @Override 
      public void changed(ObservableValue<? extends TreeItem> observable, TreeItem oldValue, TreeItem newValue) { 
       if (newValue.getValue().equals(item2.getValue())) { 
        box2.getChildren().add(getrightPane3()); 
       } else { 
        int i = box2.getChildren().size(); 
        if (i > 0) { 
         box2.getChildren().remove(0); 
        } 
       } 
      } 
     }); 

     HBox hb = new HBox(); 
     hb.getChildren().addAll(treeView,box2,box3,box4);   
     border.setCenter(hb); 
    } 

    private static class AddMenuTreeCell extends TextFieldTreeCell<String> { 
     private ContextMenu menu = new ContextMenu();  
     private TextField textField; 

     public AddMenuTreeCell() { 
      MenuItem newitem1 = new MenuItem("Insert leaf"); 
      menu.getItems().add(newitem1); 

      newitem1.setOnAction(new EventHandler<ActionEvent>() { 
       @Override 
       public void handle(ActionEvent arg0) { 

        TreeItem<String> newLeaf = new TreeItem<String>("UY"); 
           getTreeItem().getChildren().add(newLeaf); 
       } 
      }); 
     } 

     @Override 
     public void updateItem(String item, boolean empty) { 
      super.updateItem(item, empty); 
      if (empty) { 
       setText(null); 
       setGraphic(null); 
      } else { 
       if (isEditing()) { 
        if (textField != null) { 
         textField.setText(getString()); 
        } 
        setText(null); 
        setGraphic(textField); 
       } else { 
        setText(getString()); 
        setGraphic(getTreeItem().getGraphic()); 
        if (!(getTreeItem().isLeaf() && getTreeItem().getParent() == null)){ 
         setContextMenu(menu); 
        } 
       }   
      } 
     }   
     private String getString() { 
      return getItem() == null ? "" : getItem().toString(); 
     } 
    } 

    TextField textf1 = new TextField(); 
    TextField textf2 = new TextField(); 
    BorderPane root1 = new BorderPane();  
    private BorderPane getrightPane1() {    
     VBox vbox = new VBox(20); 
     vbox.setPadding(new Insets(10));   
     HBox h1 = new HBox(7); 
     HBox h2 = new HBox(7); 
     textf1.setPrefWidth(100); 
     textf1.setPromptText("Enter Height"); 
     textf1.setOnKeyReleased(new EventHandler<KeyEvent>(){ 
      @Override 
      public void handle(KeyEvent event) 
      { 
       if(textf1.getText().length() > 0 && textf2.getText().length() > 0) 
       { 
        Rectangle rect = new Rectangle(); 
        rect.setHeight(Double.parseDouble(textf1.getText())); 
        rect.setWidth(Double.parseDouble(textf2.getText())); 
        rect.setFill(null); 
        rect.setStroke(Color.RED); 
        root1.setBottom(rect); 
       } 
      } 
     }); 
     textf2.setPrefWidth(100); 
     textf2.setPromptText("Enter Width"); 
     textf2.setOnKeyReleased(new EventHandler<KeyEvent>(){ 
      @Override 
      public void handle(KeyEvent event) 
      { 
       if(textf1.getText().length() > 0 && textf2.getText().length() > 0) 
       { 
        Rectangle rect = new Rectangle(); 
        rect.setHeight(Double.parseDouble(textf1.getText())); 
        rect.setWidth(Double.parseDouble(textf2.getText())); 
        rect.setFill(null); 
        rect.setStroke(Color.RED); 
        root1.setBottom(rect); 
       } 
      } 
     }); 
     h1.getChildren().addAll(new Label("Y1:"), textf1); 
     h2.getChildren().addAll(new Label("X1:"), textf2); 
     vbox.getChildren().addAll(h1, h2); 
     root1.setLeft(vbox); 
     return root1; 
    } 

    TextField textf3 = new TextField(); 
    TextField textf4 = new TextField(); 
    BorderPane root2 = new BorderPane();  
    private BorderPane getrightPane2() {   
     VBox vbox = new VBox(20); 
     vbox.setPadding(new Insets(10)); 

     HBox h1 = new HBox(7); 
     HBox h2 = new HBox(7); 
     textf3.setPrefWidth(100); 
     textf3.setPromptText("Enter Height"); 
     textf3.setOnKeyReleased(new EventHandler<KeyEvent>(){ 
      @Override 
      public void handle(KeyEvent event) 
      { 
       if(textf3.getText().length() > 0 && textf4.getText().length() > 0) 
       { 
        Rectangle rect = new Rectangle(); 
        rect.setHeight(Double.parseDouble(textf3.getText())); 
        rect.setWidth(Double.parseDouble(textf4.getText())); 
        rect.setFill(null); 
        rect.setStroke(Color.BLUE); 
        root2.setBottom(rect); 
       } 
      } 
     }); 

     textf4.setPrefWidth(100); 
     textf4.setPromptText("Enter Width"); 
     textf4.setOnKeyReleased(new EventHandler<KeyEvent>(){ 
      @Override 
      public void handle(KeyEvent event) 
      { 
       if(textf3.getText().length() > 0 && textf4.getText().length() > 0) 
       { 
        Rectangle rect = new Rectangle(); 
        rect.setHeight(Double.parseDouble(textf3.getText())); 
        rect.setWidth(Double.parseDouble(textf4.getText())); 
        rect.setFill(null); 
        rect.setStroke(Color.BLUE); 
        root2.setBottom(rect); 
       } 
      } 
     }); 

     h1.getChildren().addAll(new Label("Y2:"), textf3); 
     h2.getChildren().addAll(new Label("X2:"), textf4); 
     vbox.getChildren().addAll(h1, h2); 
     root2.setLeft(vbox); 
     return root2; 
    } 

    private HBox getrightPane3() { 

     HBox hbox = new HBox(20); 
     hbox.setAlignment(Pos.BOTTOM_CENTER); 
     hbox.setPadding(new Insets(50)); 

     HBox hbox1 = new HBox(); 
     Rectangle rect1 = new Rectangle(); 

     if (!textf1.getText().equals("") && !textf2.getText().equals("")) {    
      rect1.setHeight(Double.parseDouble(textf1.getText())); 
      rect1.setWidth(Double.parseDouble(textf2.getText())); 
      rect1.setFill(null); 
      rect1.setStroke(Color.RED); 
      hbox1.getChildren().addAll(rect1); 
     } 

     HBox hbox2 = new HBox(); 
     Rectangle rect2 = new Rectangle(); 

     if (!textf3.getText().equals("") && !textf4.getText().equals("")) { 
      rect2.setHeight(Double.parseDouble(textf3.getText())); 
      rect2.setWidth(Double.parseDouble(textf4.getText())); 
      rect2.setFill(null); 
      rect2.setStroke(Color.BLUE); 
      hbox2.getChildren().addAll(rect2); 
     } 

     hbox.getChildren().addAll(hbox1,hbox2); 
     return hbox; 
    } 

} 

ルートは2葉Ux, Uyとの両方が矩形を構築するためのロジックが含まれており、長方形が水平根に示されていることがあります。今問題は別のリーフ名Uyを追加する必要があり、それは同じRectangle構築ロジックを持つ必要があり、これらの新しく作成された長方形は自動的にルートに表示されるはずです。

別のUyを追加しようとしましたが、これは機能しません。私は何をすべきか？どうかお考えですか？

ありがとうございます。

Answer 1

コードを少し変更しました。問題は、シーンにノードを複数回追加しようとしていることです。この例では、TreeViewとそれに関連付けられたBorderPaneに対応したマップを作成しました。

import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 
import java.util.Map; 
import javafx.application.Application; 
import javafx.application.Platform; 
import javafx.event.ActionEvent; 
import javafx.event.EventHandler; 
import javafx.geometry.Insets; 
import javafx.scene.Node; 
import javafx.scene.Scene; 
import javafx.scene.control.ContextMenu; 
import javafx.scene.control.Label; 
import javafx.scene.control.MenuItem; 
import javafx.scene.control.TextField; 
import javafx.scene.control.TreeCell; 
import javafx.scene.control.TreeItem; 
import javafx.scene.control.TreeView; 
import javafx.scene.control.cell.TextFieldTreeCell; 
import javafx.scene.input.KeyEvent; 
import javafx.scene.layout.BorderPane; 
import javafx.scene.layout.HBox; 
import javafx.scene.layout.VBox; 
import javafx.scene.paint.Color; 
import javafx.scene.shape.Rectangle; 
import javafx.stage.Stage; 
import javafx.util.Callback; 

/** 
* 
* @author blj0011 
*/ 
public class JavaFXApplication124 extends Application 
{ 
    //List<BorderPane> rightPanels = new ArrayList(); 
    static final Map<TreeItem<String>, BorderPane> MAP = new HashMap(); 
    static BorderPane root; 

    @Override 
    public void start(Stage primaryStage) 
    {   


     TreeItem<String> treeRoot = new TreeItem("Main System"); 
     root = new BorderPane(); 

     TreeView treeView = new TreeView(treeRoot); 
     treeView.setOnMouseClicked((event)->{ 
      TreeItem tempTreeItem = (TreeItem)treeView.getSelectionModel().getSelectedItem(); 
       if(tempTreeItem.getValue().equals("Main System")) 
       { 
        root.setCenter(getRootsPanel()); 
        //System.out.println(getRootsPanel()); 
       } 
       else 
       { 
        root.setCenter(MAP.get(tempTreeItem)); 
        System.out.println(MAP.get(tempTreeItem)); 
       } 


     }); 

     treeView.setCellFactory(new Callback<TreeView<String>,TreeCell<String>>(){ 
      @Override 
      public TreeCell<String> call(TreeView<String> p) { 
       return new AddMenuTreeCell(); 
      } 
     });   
     treeRoot.setExpanded(true); 

     root.setLeft(treeView); 

     TreeItem<String> uxItem1 = new TreeItem("UX"); 
     MAP.put(uxItem1, getrightPane1()); 
     TreeItem<String> uyItem1 = new TreeItem("UY"); 
     MAP.put(uyItem1, getrightPane1()); 
     treeRoot.getChildren().addAll(uxItem1, uyItem1); 

     Scene scene = new Scene(root, 500, 500); 



     primaryStage.setTitle("Hello World!"); 
     primaryStage.setScene(scene); 
     primaryStage.show(); 
    } 

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String[] args) 
    { 
     launch(args); 
    } 


    TreeItem<String> addNewTreeItem(String name) 
    { 
     TreeItem tempTreeItem = new TreeItem(name); 

     return tempTreeItem; 
    } 


    private static class AddMenuTreeCell extends TextFieldTreeCell<String> { 
     private final ContextMenu menu = new ContextMenu();  
     private TextField textField; 

     public AddMenuTreeCell() { 
      MenuItem newitem1 = new MenuItem("Insert leaf"); 
      menu.getItems().add(newitem1); 

      newitem1.setOnAction(new EventHandler<ActionEvent>() { 
       @Override 
       public void handle(ActionEvent arg0) { 
        TreeItem<String> newLeaf = new TreeItem("UY");      
        getTreeItem().getChildren().add(newLeaf); 
        MAP.put(newLeaf, getrightPane1()); 
       } 
      }); 
     } 

     @Override 
     public void updateItem(String item, boolean empty) { 
      super.updateItem(item, empty); 
      if (empty) { 
       setText(null); 
       setGraphic(null); 
      } else { 
       if (isEditing()) { 
        if (textField != null) { 
         textField.setText(item); 
        } 
        setText(null); 
        setGraphic(textField); 
       } else { 
        setText(item); 
        setGraphic(getTreeItem().getGraphic()); 
        if (!(getTreeItem().isLeaf() && getTreeItem().getParent() == null)){ 
         setContextMenu(menu); 
        } 
       }   
      } 
     } 
    } 

    private static BorderPane getrightPane1() {    
     TextField textf1 = new TextField(); 
     TextField textf2 = new TextField(); 
     BorderPane root1 = new BorderPane(); 

     VBox vbox = new VBox(20); 
     vbox.setPadding(new Insets(10));   
     HBox h1 = new HBox(7); 
     HBox h2 = new HBox(7); 

     textf1.setPrefWidth(100); 
     textf1.setPromptText("Enter Height"); 
     textf1.setOnKeyReleased(new EventHandler<KeyEvent>(){ 
      @Override 
      public void handle(KeyEvent event) 
      { 
       if(textf1.getText().length() > 0 && textf2.getText().length() > 0) 
       { 
        Rectangle rect = new Rectangle(); 
        rect.setHeight(Double.parseDouble(textf1.getText())); 
        rect.setWidth(Double.parseDouble(textf2.getText())); 
        rect.setFill(null); 
        rect.setStroke(Color.RED); 
        root1.setBottom(rect); 
       } 
      } 
     }); 
     textf2.setPrefWidth(100); 
     textf2.setPromptText("Enter Width"); 
     textf2.setOnKeyReleased(new EventHandler<KeyEvent>(){ 
      @Override 
      public void handle(KeyEvent event) 
      { 
       if(textf1.getText().length() > 0 && textf2.getText().length() > 0) 
       { 
        Rectangle rect = new Rectangle(); 
        rect.setHeight(Double.parseDouble(textf1.getText())); 
        rect.setWidth(Double.parseDouble(textf2.getText())); 
        rect.setFill(null); 
        rect.setStroke(Color.RED); 
        root1.setBottom(rect); 
       } 
      } 
     }); 

     if(textf1.getText().length() > 0 && textf2.getText().length() > 0 && root1.getBottom() == null) 
     { 
      Rectangle rect = new Rectangle(); 
      rect.setHeight(Double.parseDouble(textf1.getText())); 
      rect.setWidth(Double.parseDouble(textf2.getText())); 
      rect.setFill(null); 
      rect.setStroke(Color.RED); 
      root1.setBottom(rect); 
     } 

     h1.getChildren().addAll(new Label("Y1:"), textf1); 
     h2.getChildren().addAll(new Label("X1:"), textf2); 
     vbox.getChildren().addAll(h1, h2); 
     root1.setLeft(vbox); 
     return root1; 
    } 

    private static BorderPane getRootsPanel() { 
     BorderPane root1 = new BorderPane(); 
     HBox hbox = new HBox(); 

     List<BorderPane> listBordePane = new ArrayList(MAP.values()); 
     for(BorderPane element : listBordePane) 
     {   
      Node node = element.getBottom(); 
      if(node instanceof Rectangle) 
      { 
       Rectangle tempRectangle = ((Rectangle)node); 
       Rectangle newRectangle = new Rectangle(); 
       newRectangle.setWidth(tempRectangle.getWidth()); 
       newRectangle.setHeight(tempRectangle.getHeight()); 
       newRectangle.setFill(tempRectangle.getFill()); 
       newRectangle.setStroke(tempRectangle.getStroke()); 
       Platform.runLater(()->{hbox.getChildren().add(newRectangle);}); 
      } 
     } 

     Platform.runLater(()->{root1.setLeft(hbox);}); 
     return root1; 
    } 
} 

コード更新！あなたはTextField java.lang.NumberFormatExceptionをキャッチする必要があります！すべての最初の