Assessment of JavaFX 2.0 - treeView example

Similar Questions

• TreeView with icons displayed incorrectly after expansion (8 JavaFX)

  I have a TreeView with classes CellFactory and TreeCell custom, which has been implemented in JavaFX 2.2 and works perfectly. However, after I upgraded to 8 JavaFX. This tree is completely messed up. If I develop a nodes, there will be duplicate tree nodes in the tree. Here is a simplified version of the source code. If not use a method setGraphic() in class TreeCell, it works fine.

  package test;
  
  
  import javafx.application.Application;
  import javafx.scene.Scene;
  import javafx.scene.control.TreeCell;
  import javafx.scene.control.TreeItem;
  import javafx.scene.control.TreeView;
  import javafx.scene.image.Image;
  import javafx.scene.image.ImageView;
  import javafx.scene.layout.BorderPane;
  import javafx.stage.Stage;
  import javafx.util.Callback;
  
  
  public class TreeViewTest extends Application {
      private static final Image image = new Image(TreeViewTest.class.getResourceAsStream("icon_datasource.png"));
      
      public TreeViewTest() {
      }
  
  
      @Override
      public void start(Stage primaryStage) {
          BorderPane rootPane = new BorderPane();
  
  
          TreeItem<String> root = new TreeItem<String>("Root");
          
          for (int i = 0; i < 5; i++) {
              TreeItem<String> ds = new TreeItem<String>("Datasource " + i);
              
              for (int t = 0; t < 5; t++) {
          TreeItem<String> tb = new TreeItem<String>("Table " + t);
          ds.getChildren().add(tb);
              }
              
              root.getChildren().add(ds);
          }
          
          TreeView<String> tree = new TreeView<String>();
          tree.setCellFactory(new Callback<TreeView<String>, TreeCell<String>>() {
       
       public TreeCell<String> call(TreeView<String> param) {
    return new TreeCell<String>() {
       @Override
       protected void updateItem(String item, boolean empty) {
           super.updateItem(item, empty);
           
           if (!empty) {
               ImageView imageView = new ImageView(image);
               setText(item);
               setGraphic(imageView);
           }
       }
    };
       }
    });
          tree.setRoot(root);
          tree.setShowRoot(false);
          
          rootPane.setLeft(tree);
          
          Scene scene = new Scene(rootPane, 1024, 800);
  
  
          primaryStage.setTitle("Test");
          primaryStage.setScene(scene);
          primaryStage.show();
      }
      
      public static void main(String[] args) {
          launch(args);
      }
  }
  

  In general, cells are reused as items in TreeView (and some make, and ListViews) as soon as they become visible and invisible. It is perfectly possible for a cell to have an element that is not empty and then it change to empty, as the cell is reused for an empty cell.

  If you have a bug in your code: you need

  tree.setCellFactory(new Callback, TreeCell>() {
  
              public TreeCell call(TreeView param) {
                  return new TreeCell() {
                      @Override
                      protected void updateItem(String item, boolean empty) {
                          super.updateItem(item, empty);
  
                          if (!empty) {
                              ImageView imageView = new ImageView(image);
                              setText(item);
                              setGraphic(imageView);
                          } else {
                              setText(null);
                              setGraphic(null);
                          }
                      }
                  };
              }
          });
  

  You lucky in JavaFX2.2 that the re-use of cell does not seem to affect your bug. improving the effectiveness of the re-use of the cell in JavaFX 8 has exposed the problem.

  Furthermore, it is generally a bit pointless to re - create the nodes each time than updateItem (...) is called (frequently), rather than create them once when the cell is created (much less often). So consider

  tree.setCellFactory(new Callback, TreeCell>() {
  
              public TreeCell call(TreeView param) {
                  return new TreeCell() {
                      private ImageView imageView = new ImageView(image);
                      @Override
                      protected void updateItem(String item, boolean empty) {
                          super.updateItem(item, empty);
  
                          if (!empty) {
                              setText(item);
                              setGraphic(imageView);
                          } else {
                              setText(null);
                              setGraphic(null);
                          }
                      }
                  };
              }
          });
  

  Instead

• Drag in TreeView

  Hi all

  I want to make a simple request where you have a tree and on the other side three pictures. In this example I used three rectangles each with a different color.

  The user should be able to drag one of the rectangles of an item in the tree in order to add a new paragraph.

  Everything works, the only problem I have is that I also can drop off anywhere in the entire tree 'frame '. I want that the user must release on

  an element in the tree, not anywhere in the treeframe.

  My second question is, can I also drag the entire image / rectangle instead of the standard small window box when a user tries to drag something? I read that

  in JavaFX 8 would be possible, here you are able to transmit an entire image to the dragboard. My goal was to set the opacity of the rectangle enjoy 20% and then paste

  the rectangle with the mouse, and if the user releases the mouse, the rectangle must return to its position of moose with full opacity. It would be a "nice to have", but

  the first problem is unimportant.

  This example should work out of the box:

  package de.hauke.edi;
  
  import java.io.IOException;
  
  import de.cargosoft.edi.eservicemanager.Main3.ModuleTreeItem;
  import javafx.animation.TranslateTransition;
  import javafx.application.Application;
  import javafx.event.EventHandler;
  import javafx.scene.Scene;
  import javafx.scene.control.TreeCell;
  import javafx.scene.control.TreeItem;
  import javafx.scene.control.TreeView;
  import javafx.scene.image.ImageView;
  import javafx.scene.input.ClipboardContent;
  import javafx.scene.input.DragEvent;
  import javafx.scene.input.Dragboard;
  import javafx.scene.input.MouseEvent;
  import javafx.scene.input.TransferMode;
  import javafx.scene.layout.BorderPane;
  import javafx.scene.layout.VBox;
  import javafx.scene.paint.Color;
  import javafx.scene.shape.Rectangle;
  import javafx.stage.Stage;
  import javafx.util.Callback;
  import javafx.util.Duration;
  
  public class Main4 extends Application {
  
      @Override
      public void start(Stage primaryStage) throws IOException {
  
          BorderPane border = new BorderPane();
          Scene scene = new Scene(border, 700, 700);
  
          // setup tree
          TreeView<String> tree = new TreeView<String>();
          TreeItem<String> rootItem = new TreeItem<String>("Root");
          rootItem.setExpanded(true);
          for (int i = 1; i < 6; i++) {
              TreeItem<String> item = new TreeItem<String>("Node" + i);
              rootItem.getChildren().add(item);
          }
          tree.setRoot(rootItem);
  
          // setup boxes
          final Rectangle red = new Rectangle(100, 100);
          red.setFill(Color.RED);
          final Rectangle green = new Rectangle(100, 100);
          green.setFill(Color.GREEN);
          final Rectangle blue = new Rectangle(100, 100);
          blue.setFill(Color.BLUE);
  
          addDragFunction(red, "red");
          addDragFunction(green, "green");
          addDragFunction(blue, "blue");
  
          tree.setCellFactory(new Callback<TreeView<String>, TreeCell<String>>() {
  
              public TreeCell<String> call(TreeView<String> arg0) {
                  final TreeCell<String> treeCell = new TreeCell<String>() {
                      protected void updateItem(String item, boolean empty) {
                          super.updateItem(item, empty);
                          if (item != null) {
                              setText(item);
                          }
                      }
                  };
  
                  treeCell.setOnDragOver(new EventHandler<DragEvent>() {
                      public void handle(DragEvent event) {
                          
                          event.acceptTransferModes(TransferMode.COPY_OR_MOVE);
                          
                          event.consume();
                      }
                  });
  
                  treeCell.setOnDragDropped(new EventHandler<DragEvent>() {
                      public void handle(DragEvent event) {
                          
                          Dragboard db = event.getDragboard();
                          if (db.hasString()) {
                              TreeItem<String> item = new TreeItem<String>("New "+db.getString() + " colored element dropped");
                              treeCell.getTreeItem().getChildren().add(item);
                              treeCell.getTreeItem().setExpanded(true);
                          }
                          event.consume();
                      }
                  });
  
                  return treeCell;
              }
  
          });
  
          // add elements to stage
          VBox vbox = new VBox();
          vbox.getChildren().add(red);
          vbox.getChildren().add(green);
          vbox.getChildren().add(blue);
  
          border.setLeft(tree);
          border.setRight(vbox);
  
          primaryStage.setScene(scene);
          primaryStage.show();
  
      }
  
      private void addDragFunction(final Rectangle control, final String code) {
          control.setOnDragDetected(new EventHandler<MouseEvent>() {
              public void handle(MouseEvent event) {
                  Dragboard db = control.startDragAndDrop(TransferMode.ANY);
  
                  /* put a string on dragboard */
                  ClipboardContent content = new ClipboardContent();
                  content.putString(code);
                  db.setContent(content);
  
                  event.consume();
              }
          });
  
          control.setOnDragDone(new EventHandler<DragEvent>() {
              public void handle(DragEvent event) {
                  event.consume();
              }
          });
      }
  
      public static void main(String[] args) {
          launch(args);
      }
  }
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

  Thanks for any help!

  Everything works, the only problem I have is that I also can drop off anywhere in the entire tree 'frame '. I want that the user must release on

  an element in the tree, not anywhere in the treeframe.

  Just surround the code in methods of grip for your setOnDragOver and setOnDragDropped event handlers with

  If (! treeCell.isEmpty ()) {...}

  You could add more sense here if you need, for example to prevent the user from falling on the root or to limit the number of children has fallen on a single node.

  For the JavaFX 8 image features with stretching, in your setOnDragDetected Manager, change the opacity, create an image of the control by calling snapshot() and pass the image to the setDragView (...) method of the Dragboard. In the setOnDragDone Manager, resume the opacity.

• Root node - TreeView

  How to create a TreeView without needing a node root. Example: Same as the eclipse package Explorer where I can create several projects without the need of a node root?
  
  
  Thank you

  You still need a root node, but it can be a dummy node. You can then call treeView.setShowRoot (false) to hide:

  http://docs.Oracle.com/JavaFX/2.0/API/JavaFX/scene/control/TreeView.html#setShowRoot%28boolean%29

  -Jonathan

• JavaFX tree scenario

  Currently, I'm experimenting with trees in JavaFX and would like to know if the following scenario is possible? At the present time, I have a tree structure that displays a check box for each node in the tree with the exception of the root node where I use a graph icon. Now what I would like to combine with the above is for a textbox control when a node is selected, so that the user can change the value/label treeitem elements. Can this be achieved in conjunction with what I have right now, cause I have the unpleasant feeling, it is probably not possible in combination? If I use the TableView tutorial on the site of JavaFX, for example. I'm curious to see what other responses of peoples in this area?

  Yes it is possible, I have tried hacking some really ugly buggy code I paste here to check for this approach.
  Approach was:
  1. create a TreeView as in this case-online http://download.oracle.com/javafx/2.0/api/javafx/scene/control/TreeView.html
  2. tap the TreeView as a new utility class CheckedString that contains a Boolean to control value and a string value for the label control.
  3. on the root of the tree set a chart.
  4 create a factory cell editable TreeView as detailed in 13-9 and 13-10 here-online http://download.oracle.com/javafx/2.0/ui_controls/table-view.htm
  5. in this case, you don't want to use the setContentDisplay method as is done in 13-9
  6. in cell tree edition, instead of setting the display of the content of the node, to store two points of view on the field, one editable views and another a readonly.
  7. editable view consists of a box + textfield in a hbox.
  8 Readonly view consists of a labeled box.
  9. when such StartEdit method is called, the call if the call comes from the root of the tree (that way the root graph is not editable).
  10. in StartEdit such switch the State of the current view TreeCells to display editable by setting the chart of cells to the edit view.
  11. in the cancelEdit switch the State of the current view TreeCells at the sight of readonly by defining the chart of cells for playback only display.
  12. in the updateItem, if this is the root element, just display the graph of the root, or query the current status of the update and TreeCell and show edit or read only view as appropriate (by changing the image of cells).

  Sounds complicated, but you also try to design a quite complicated UI node. You need to change the thing a bit to make it nice and useful. If possible, I recommend a review of the UI design and try something simpler.

• How to make a label (javafx) to display the current time dynamically?

  Hi all

  How to make a label (javafx) to display the current time dynamically?

  I have not found a Type of event related to the time in javafx API.

  Please give me some suggestions. Thank you!

  Sage

  There are lots of examples of JavaFX clocks available, for example https://gist.github.com/jewelsea/3388637 or http://blog.crisp.se/2012/08/09/perlundholm/an-analog-clock-in-javafx

  For a simple label displaying the time, the simplest thing is to create a Timeline with duration 1 second and the number of indefinite cycle, which triggers an event handler that updates the label:

  final Label clock = new Label();
  final DateFormat format = DateFormat.getInstance();
  final Timeline timeline = new Timeline(new KeyFrame(Duration.seconds(1), new EventHandler() {
       @Override
       public void handle(ActionEvent event) {
            final Calendar cal = Calendar.getInstance();
            clock.setText(format.format(cal.getTime());
       }
  });
  timeline.setCycleCount(Animation.INDEFINITE);
  timeline.play();
  

  (If you use Java 8, use the new time API, which is much more pleasant than calendar.)

• How to use HTML in the JavaFX controls?

  JavaFX supports using HTML in the text of the JavaFX controls? For example, in the Swing components:

  button = new JButton("<html><font face=arial size=16><center><b><u>E</u>nable</b></font><br>"
    + "<font face=cambria size=12 color=#ffffdd>middle button</font></html>");
  

  If not, we could find a workaround?

  Incorporating a WebView in a label for the HTML rendering

  
  

  A WebView is a node that displays HTML.

  Most of the controls implement labelled, or have elements that are labeled.

  One labeled has a method setGraphic (node) that allows you to establish the chart attached to the label of a node given (including a WebView).

  For example:

  WebView webview = new WebView();
  webview.getEngine().loadContent("Enable
  middle button");
  webview.setPrefSize(150, 50);
  
  Button buttonWithHTML = new Button("", webview);
  

  need to create a button with html in there (I didn't actually try running the example above).

  Aside time to start relatively slow on first use and overhead costs (which I can't quantify) to use WebView in this way, there are a couple of jira exceptional applications that are a bit annoying.

  RT-25004 allow transparent backgrounds in WebView

  RT-25005 favorite auto sizing for WebView

  You can vote for applications above jira or comment if such a feature is important to you.

  FXML/TextFlow/CSS Alternative

  Rather than using html in the labelled, TextFlow control support was introduced in Java 8, so that could be used instead.

  TextFlow also works well with FXML and css if you prefer to have the stuff in the TextFlow handled via a markup and a declarative style language.

  Open feature request

  There is a feature open request RT-2160 HTML support for text , which is currently scheduled for implementation in the initial release of Java 8.  I think the likelihood of it actually included it is zero percent, if it can be considered for a future version.  You can vote for the issue or add comments to it or provide an implementation if you are so inclined.

  Implementation considerations

  A possible implementation would be something that analyzes the HTML and then built a TextFlow HTML parsed according to the rules that are set out laborious mind-numbing detail in the specification HTML5 treatment.

  You can use an HTML parser relaxed such as the analysis of validator.nur (even though there may be others who would be a better fit).

  A simple implementation would be just to use the Analyzer in the jdk that is used for the swing controls, but that is hopelessly outdated.

  Perhaps, even simpler would be to accept only html strict entry and just use SAX to parse out, although things like validator.nu are too difficult to work with.

  Then, to the limited number of analyzed tags that you want to support (and you don't want to really not compatible with HTML5 all for something like this - otherwise use just WebView), create your TextFlow of the DOM who created your Analyzer.

  I wouldn't even both trying to handle most of the things in your html string in your application, stuff to do with style, fonts, colors, etc. These things were never in any case any good html and css is better for their handling, so just support things commonly used in modern day regular html (take a look at the HTML source "bootstrap" for example to see what it might be - if bootstrap uses her, I don't think not that you support it).  Things will support you are things around structure of document as lists, headings, etc. div blocks and cover the nodes - so only to implement this kind of important things and delegate all the rest to css where it belongs.

  Also, make sure that your implementation is part of the FXML so that you can easily integrate your html subset in a doc FXML.

• Example of TableViewBuilder

  Given a Person class:
  

  public class Person {
      private StringProperty firstName;
       private StringProperty lastName;
       
       public Person(String firstName, String lastName){
           setFirstName(firstName);
           setLastName(lastName);
       }
       
       //SETTERS
       public final void setFirstName(String value) { firstNameProperty().set(value); }
       public final void setLastName(String value) { lastNameProperty().set(value); }
       
       //GETTERS
       public String getFirstName() { return firstNameProperty().get(); }
       public String getLastName() { return lastNameProperty().get(); }
       
       //PROPERTY GETTERS
       public StringProperty firstNameProperty() { 
           if (firstName == null) firstName = new SimpleStringProperty(this, "firstName");
           return firstName; 
       }     
       public StringProperty lastNameProperty() { 
           if (lastName == null) lastName = new SimpleStringProperty(this, "lastName");
           return lastName; 
       } 
  }

  I've recreated the JavaFX API on TableView example:
  

  public class TestTableViewBuilder extends Application {
      public static void main(String[] args) {
          launch(args);
      }
  
      @Override
      public void start(Stage primaryStage) {
         primaryStage.setTitle("Hello World!");
         
         final ObservableList<Person> data = FXCollections.observableArrayList(
              new Person("Jacob", "Smith"),
              new Person("Isabella", "Johnson"),
              new Person("Ethan", "Williams"),
              new Person("Emma", "Jones"),
              new Person("Michael", "Brown")
          );
         
         TableView<Person> table = new TableView<Person>();
         
         table.setItems(data);
  
         TableColumn<Person,String> firstNameCol = new TableColumn<Person,String>("First Name");
         firstNameCol.setCellValueFactory(new PropertyValueFactory("firstName"));
         TableColumn<Person,String> lastNameCol = new TableColumn<Person,String>("Last Name");
         lastNameCol.setCellValueFactory(new PropertyValueFactory("lastName"));
  
         table.getColumns().setAll(firstNameCol, lastNameCol);       
  
         Group root = new Group();
         root.getChildren().add(table);
         primaryStage.setScene(new Scene(root));
         primaryStage.show();
      }
  }

  However, I am trying unsuccessfully to purely TableViewBuilder create the same table. Someone at - it had a working example?
  Thank you.
  
  Published by: Burabari55 on February 16, 2012 05:58

  I managed to find how to do this with the help of Sergey here: http://stackoverflow.com/questions/9322187/javafx-2-0-tableviewbuilder-how-to-use

  TableViewBuilder.create().items(data).columns(
    TableColumnBuilder.create()
      .text("First Name").cellValueFactory(new PropertyValueFactory("firstName"))
    .build(),
    TableColumnBuilder.create()
      .text("Last Name").cellValueFactory(new PropertyValueFactory("lastName"))
    .build()
  ).build()
  

  The trick is to use the TableViewBuilder syntax. create() rather than TableViewBuilder. create(), that wasn't a syntax (type narrowing of the type of return a static call to the place of use for the static call) I had never seen it used before Java code.

  There is also this, version slightly more efficient that shows how you can reuse a builder of the column.

  TableColumnBuilder tcb = TableColumnBuilder.create();
  TableView table = TableViewBuilder.create().items(data).columns(
    tcb.text("First Name").cellValueFactory(new PropertyValueFactory("firstName")).build(),
    tcb.text("Last Name").cellValueFactory(new PropertyValueFactory("lastName")).build()
  ).build();
  

• Need help do the elements of dynamic tree

  The news is that I decided that a Treeview would be better suited for a Properties window I design as part of a larger project. I'm thinking about a way to dynamically add treeitem elements to the tree by clicking on a button. (inside an action event block basically) But the API gives some fairly mundane and static means to use it. It assumes that the tree does just before it is displayed and all the elements are static or reading a file before the tree is initialized it doesn't seem to be an obvious way to add treeitem elements to TreeView after its manufacture.
  Here's what the API shows in his example:
  
  (http://docs.oracle.com/javafx/2/api/index.html)
  
  TreeItem < String > root = new TreeItem < String > ("root node");
  root.setExpanded (true);
  root.getChildren (.addAll)
  New TreeItem < String > ("Item 1"),
  New TreeItem < String > ("Item 2"),
  New TreeItem < String > ("Item 3")
  );
  TreeView TreeView < String > is new TreeView < String > (root);.
  
  
  
  Again, its only done at the end I need a way to add treeitem elements on the fly (in response to an event).
  
  
  I use a .fxml, a controller of java and Netbeans. If that helps.

  You can call

  treeItem.getChildren().add(...);
  

  or

  treeItem.getChildren().remove(...);
  

  or indeed other methods that manipulate the content of the list of the tree at any time on the FX application thread.

  Thus, for example:

  TreeExample.fxml:

  TreeExampleController.java:

  import javafx.beans.binding.BooleanBinding;
  import javafx.fxml.FXML;
  import javafx.scene.control.Button;
  import javafx.scene.control.TreeItem;
  import javafx.scene.control.TreeView;
  
  public class TreeExampleController {
    private @FXML TreeView tree ;
    private @FXML Button addButton ;
    private @FXML Button removeButton ;
  
    private int count ;
  
    public void initialize() {
      removeButton.disableProperty().bind(new BooleanBinding() {
        {
          super.bind(tree.getSelectionModel().selectedItemProperty());
        }
        @Override
        protected boolean computeValue() {
          TreeItem selectedNode = tree.getSelectionModel().getSelectedItem();
          return selectedNode == null || selectedNode == tree.getRoot();
        }
  
      });
      count = 1 ;
    }
  
    public void addNode() {
      TreeItem parent = tree.getSelectionModel().getSelectedItem();
      if (parent==null) {
        parent = tree.getRoot();
      }
      count++ ;
      final TreeItem newNode = new TreeItem("Node "+count);
      parent.getChildren().add(newNode);
      parent.setExpanded(true);
      tree.getSelectionModel().select(newNode);
    }
  
    public void removeNode() {
      TreeItem selectedNode = tree.getSelectionModel().getSelectedItem();
      if (selectedNode != null) {
        TreeItem parentNode = selectedNode.getParent();
        if (parentNode != null) {
          parentNode.getChildren().remove(selectedNode);
        }
      }
    }
  }
  

  and TreeExample.java:

  import javafx.application.Application;
  import javafx.fxml.FXMLLoader;
  import javafx.scene.Parent;
  import javafx.scene.Scene;
  import javafx.stage.Stage;
  
  public class TreeExample extends Application {
  
    @Override
    public void start(Stage primaryStage) throws Exception {
      Parent root = FXMLLoader.load(getClass().getResource("TreeExample.fxml"));
      Scene scene = new Scene(root, 600, 400);
      primaryStage.setScene(scene);
      primaryStage.sizeToScene();
      primaryStage.show();
    }
  
    /**
     * @param args
     */
    public static void main(String[] args) {
      launch(args);
    }
  
  }
  

  Select the nodes and add children or delete to your heart's content...

• the mouse on the treeItem element event

  I have a treeview, I choose a treeItem, but I'm not able to get the treeItem is selected.
  
  It's the example treeview structure

  root

  > subroot
  > sample / / I want to get this article
  
  I used setOnMouseClicked for treeView not able to get the selected treeItem element.
  
  Help, please.

  Hi Gotham,
  The example of what Shakir has provided, I added the changes (opening on double-click stage). Please check.

  import javafx.application.Application;
  import javafx.event.EventHandler;
  import javafx.scene.Group;
  import javafx.scene.Node;
  import javafx.scene.Scene;
  import javafx.scene.control.Label;
  import javafx.scene.control.SelectionMode;
  import javafx.scene.control.TreeCell;
  import javafx.scene.control.TreeItem;
  import javafx.scene.control.TreeView;
  import javafx.scene.image.Image;
  import javafx.scene.image.ImageView;
  import javafx.scene.input.MouseEvent;
  import javafx.scene.layout.StackPane;
  import javafx.scene.paint.Color;
  import javafx.stage.Stage;
  import javafx.util.Callback;
  
  public class TreeViewSample extends Application {
  
      private final Node rootIcon = new ImageView(
          new Image(getClass().getResourceAsStream("folder_16.png"))
      );
  
      public static void main(String[] args) {
          launch(args);
      }
  
      @SuppressWarnings("unchecked")
       @Override
      public void start(Stage primaryStage) {
          primaryStage.setTitle("Tree View Sample");        
  
          TreeItem rootItem = new TreeItem ("Inbox", rootIcon);
          rootItem.setExpanded(true);
          for (int i = 1; i < 6; i++) {
              TreeItem item = new TreeItem ("Message" + i);
              rootItem.getChildren().add(item);
          }        
  
          TreeView tree = new TreeView (rootItem);
          tree.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
          /*tree.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
              @Override
              public void changed(ObservableValue observable, Object oldValue, Object newValue) {
                  TreeItem treeItem = (TreeItem)newValue;
                  System.out.println("Selected item is" + treeItem);
              }
          });*/
  
          tree.setCellFactory(new Callback, TreeCell>() {
          @Override
          public TreeCell call(TreeView paramP) {
            return new TreeCell(){
                 @Override
                 protected void updateItem(String paramT, boolean paramBoolean) {
                      super.updateItem(paramT, paramBoolean);
                      if(!isEmpty()){
                           setGraphic(new Label(paramT));
                           final TreeCell this$ = this;
                           this.setOnMouseClicked(new EventHandler() {
                                @Override
                                public void handle(MouseEvent event) {
                                     if(event.getClickCount()==2){
                                          // Getting the node value.
                                          String nodeValue = this$.getItem();
  
                                          // Opening a new stage by passing this value.
                                          Group root = new Group();
                                          root.getChildren().add(new Label(nodeValue));
                                          Scene scene = new Scene(root, 300, 300, Color.AQUA);
                                          Stage stg = new Stage();
                                          stg.setScene(scene);
                                          stg.show();
                                     }
                                }
                           });
                      }
                 }
            };
          }
       });
          StackPane root = new StackPane();
          root.getChildren().add(tree);
          primaryStage.setScene(new Scene(root, 300, 250));
          primaryStage.show();
      }
  }
  

  Kind regards
  SAI Pradeep Dandem.

• CCodeGen of LabVIEW with Keil RTX

  I hope this is the right forum. Please correct me if it's not.

  Does anyone know of a good tutorial on obtaining LabVIEW CCodeGen working on a project of Keil using RTX? I use LabVIEW 2012 with the installed CCodeGen 2012 assessment. I got the basic example using keil project work and I did a no - RTX Keil project which seems to work perfectly.

  However, when you try this port to a project with RTX OS I would have little chance. The LVRuntime code seems to recognize that RTX is used but it seems to me to miss some includes or something.

  Thanks for any info to point me in the right direction.

  Answered my own questions via the document "Getting started with the NI LabVIEW C Generator". Page 15 "on the target tab, notice that the operating system is set to Nothing. Do not set this value for RTX, which is incompatible with the generated C Code. »

  That would explain all the __RTX errors I get trying to build related.

• How to raise an event during the double click on a tree node

  I have this code that creates the new tab in a remote Java class.

  treeView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<TreeItem<String>>()
     {
     @Override
     public void changed(ObservableValue<? extends TreeItem<String>> observable, TreeItem<String> oldValue, TreeItem<String> newValue)
     {
     System.out.println("Selected Text : " + newValue.getValue());
     // Create New Tab
     Tab tabdata = new Tab();
     Label tabALabel = new Label("Test");
    tabdata.setGraphic(tabALabel);
  
     DataStage.addNewTab(tabdata);
     }
     });
  

  Can you tell me how I can change the code to open a new tab when I double click a tree node. In my code, the tab opens when I click once. What event handler do I need?

  import java.util.Arrays;
  
  import javafx.application.Application;
  import javafx.event.EventHandler;
  import javafx.stage.Stage;
  import javafx.scene.Scene;
  import javafx.scene.input.MouseEvent;
  import javafx.scene.layout.StackPane;
  import javafx.scene.control.TreeCell;
  import javafx.scene.control.TreeView;
  import javafx.scene.control.TreeItem;
  import javafx.scene.control.SelectionMode;
  import javafx.util.Callback;
  
  public class TreeTest extends Application {
  
    public static void main(String[] args) {
      launch(args);
    }
  
    @Override
    public void start(Stage primaryStage) throws Exception {
      primaryStage.setTitle("TreeView Test");
      primaryStage.setScene(createScene());
      primaryStage.show();
    }
  
    private Scene createScene() {
      final StackPane stackPane = new StackPane();
      final TreeView treeView = new TreeView();
      treeView.setRoot(createModel());
      treeView.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
  
      treeView.setCellFactory(new Callback, TreeCell>() {
        @Override
        public TreeCell call(TreeView treeView) {
          return new ClickableTreeCell();
        }
      });
      stackPane.getChildren().add(treeView);
      return new Scene(stackPane);
    }
  
    private TreeItem createModel() {
      TreeItem root = new TreeItem("RootNode");
      TreeItem packageA = new TreeItem("package A");
      packageA.getChildren().addAll(
          Arrays.asList(new TreeItem("A1"), new TreeItem("A2"), new TreeItem("A3"))
      );
      TreeItem packageB = new TreeItem("package B");
      packageB.getChildren().addAll(
          Arrays.asList(new TreeItem("B1"), new TreeItem("B2"), new TreeItem("B3"))
      );
      root.getChildren().addAll(Arrays.asList(packageA, packageB));
      return root;
    }
  
    private class ClickableTreeCell extends TreeCell {
      ClickableTreeCell() {
        setOnMouseClicked(new EventHandler() {
          @Override
          public void handle(MouseEvent event) {
            // Handle double-clicks on non-empty cells:
            if (event.getClickCount()==2 && ! isEmpty()) {
              System.out.println("Mouse double-clicked on: " + getItem());
            }
          }
        });
      }
  
      @Override
      protected void updateItem(String item, boolean empty) {
        super.updateItem(item, empty);
        if (empty) {
          setText(null);
        } else {
          setText(item);
        }
      }
    }
  }
  

• Documentation for FXML and CSS

  Where can I find documentation that lists all the different things that you can do using FXML and CSS for JavaFX?

  For example, how am I supposed to know that I can do "police - fx - size: 12px" for the size of the font in CSS or ' = 'System' size =' 12.0 font name ' / > ' to FXML?

  CSS style

  Here is the css reference guide, which is a great start.

  Complete by carefully studying caspian.css (the 2.2 JavaFX stylesheet) and modena.css (the stylesheet of JavaFX 8).

  There is also information disseminated in the Oracle JavaFX tutorialscss style.

  Try to use the material in the reference Guide css for the style of some of the simple default controls, like buttons etc.

  Once you have the hang of this, move on to something more complex like tables and graphics.

  Don't forget tips as the constant substitution of some of the default paint for example try because it is a style much easier if all you need is a change in color, the following style sheet:

  .root { -fx-base: antiquewhite; }
  

  FXML reference

  It is (and will never) such a thing (as least not a complete).

  FXML works reflecting on classes.

  As you add more classes in your classpath or change existing classes, you can add more elements and attributes to fxml.

  Best current documentation of fxml is the Introduction of FXML and the tutorials FXML from Oracle.

  In terms of learning some of the elements and attributes to FXML for most common standard JavaFX controls try to load up SceneBuilder and examining the FXML it generates.

  Also, as FXML is a reflection of the JavaFX Java API, you can get know which attributes and elements, it can use in looking at the standard javadoc JavaFX.

  Whatever he says, I think that the FXML documentation could be improved, so if after that you are going through in detail by studying the available information, I have provided in this post, you have concrete ideas to improve the documentation, feel free to file detailed and specific applications in the Tracker JavaFXor send your comments to the e-mail address of the JavaFX documentation team : [email protected]

• Son not synchronized when adding the video loop of JPanel

  I'm working on a project for the school at the time where I am trying to create an image gallery and video player. In the Welcome window, I created two JPanels with MouseListeners, one to hold an image and one to hold a video loop of 5 seconds. Initially, I used this:
  
  SerializableAttribute public class WelcomeVideoLoader extends JPanel implements Runnable {}
  
  Media;
  Player MediaPlayer;
  MediaView view;
  JFXPanel jfxPanel;
  Dimension d;
  DoubleProperty width;
  DoubleProperty height;
  Root group;
  
  public WelcomeVideoLoader (file, Dimension d) {}
  
  This.d = d;
  Media = new Media (file.toURI () m:System.NET.SocketAddress.ToString ());
  
  jfxPanel = new JFXPanel();
  
  playAndLoopVideo();
  
  }
  
  private void playAndLoopVideo() {}
  
  root = new Group();
  
  reader = new MediaPlayer (media);
  Player.Play ();
  player.setMute (true);
  view = new MediaView (player);
  
  DoubleProperty width = view.fitWidthProperty ();
  DoubleProperty height = view.fitHeightProperty ();
  
  Width.bind (Bindings.selectDouble (View.sceneProperty (), "width"));
  Height.bind (Bindings.selectDouble (View.sceneProperty (), 'height'));
  
  view.setPreserveRatio (true);
  root.getChildren () .add (view);
  player.setOnEndOfMedia (this);
  
  () Platform.runLater
  new Runnable() {}
  @Override
  public void run() {}
  Scene = new scene (root, d.getWidth (), d.getHeight ());
  jfxPanel.setScene (scene);
  }
  });
  
  Super.Add (jfxPanel);
  }
  
  @Override
  public void run() {}
  Player.Stop ();
  playAndLoopVideo();
  }
  }
  
  It comes to stacktrace:
  
  Exception in the executable
  java.lang.IllegalArgumentException: Group@4d714a77[styleClass=root]is already defined as root to another scene
  to javafx.scene.Scene$ 10.invalidated(Scene.java:991)
  at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:129)
  at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:163)
  at javafx.scene.Scene.setRoot(Scene.java:953)
  to javafx.scene.Scene. < init > (Scene.java:291)
  to javafx.scene.Scene. < init > (Scene.java:260)
  to se.theshahin.gallery.utils.WelcomeVideoLoader$ 1.run(WelcomeVideoLoader.java:69)
  to com.sun.javafx.application.PlatformImpl$ $4 1.run(PlatformImpl.java:179)
  to com.sun.javafx.application.PlatformImpl$ $4 1.run(PlatformImpl.java:176)
  at java.security.AccessController.doPrivileged (Native Method)
  to com.sun.javafx.application.PlatformImpl$ 4.run(PlatformImpl.java:176)
  to com.sun.glass.ui.InvokeLaterDispatcher$ Future.run (InvokeLaterDispatcher.java:76)
  
  Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
  to javafx.embed.swing.JFXPanel$ HostContainer$ 1.run(JFXPanel.java:741)
  at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
  at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:727)
  at $200 (EventQueue.java:103) java.awt.EventQueue.access
  in java.awt.EventQueue$ 3.run(EventQueue.java:688)
  in java.awt.EventQueue$ 3.run(EventQueue.java:686)
  at java.security.AccessController.doPrivileged (Native Method)
  in java.security.ProtectionDomain$ 1.doIntersectionPrivilege(ProtectionDomain.java:76)
  at java.awt.EventQueue.dispatchEvent(EventQueue.java:697)
  at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
  at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
  at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
  at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
  
  It works for maybe 6-7 loops, but then he out craps. So I tried to create an ArrayList of the Group and creation of 100 of them and passing to the following for each loop, to see if it worked. There can be no. It turns out that my son work independently one from the other and after awhile, they get confused upward.
  
  I'm still new to programming and can't seem to find much on the subject, as I understand, everything seems to be written for people with years of experience. I have a feeling that javafx.concurrent is the way to go, but I can't understand how to implement it in my code. I worked on this for 2 days in a row, without success and would really appreciate it if someone could point me in the right direction. Thank you.

  So you're making it much more complex that it must be (what happens when you're a new programmer).

  First of all, do you need to use Swing? The incorporation of JavaFX in Swing is delicate and creates complex multithreaded processing problems that you need to manage in a relatively small way. Unless there are other requirements, you have not mentioned, you should be able to do these things in JavaFX. Hello World example [url http://docs.oracle.com/javafx/2/get_started/hello_world.htm] gives a simple example; Then, look at the layout [url http://docs.oracle.com/javafx/2/layout/jfxpub-layout.htm] tutorial to see how to make some simple page layouts.

  To create a video loop, you do not need to reboot it by hand, as you try to do it with the earphone for the end of the media. Just use

  player.setCycleCount(MediaPlayer.INDEFINITE);
  

  and it will loop indefinitely. You can always meet this reboot (if you want to do something else, like changing the image) by registering a listener for changes with the currentCount to the mediaPlayer property.

• Bridge WebView js-java error

  I tried to run the WebViewSample from this page in Netbeans, but get the following exception when trying to call javascript javafx * i.e. When you click on the link to exit the help screen)
  
  Exception in thread "Thread of Application JavaFX' java.lang.NoSuchMethodError: booleanValue
  at com.sun.webpane.webkit.JSObject.setMemberImpl (Native Method)
  at com.sun.webpane.webkit.JSObject.setMember(JSObject.java:37)
  
  
  I use jdk1.7.0_06 (which includes the javafx runtime) on Ubuntu 12.04. I get the same exception when I try to sample on my macBookPro.
  
  The sample should work? No idea how I could fix this?
  
  
  Thank you
  
  Allan

  The sample should work? No idea how I could fix this?

  Verification of jira, I noted:
  http://JavaFX-JIRA.Kenai.com/browse/RT-22725 "berries of JS2Java bridge and other parts of the bridge JS2Java don't work under Linux"
  Which generates the same message trace and stack of error than the one in your post.
  It seems that the error has been corrected and will be available in 2.2b17 of javafx.

  The example does not work for me (runs and does not throw an exception) on Windows - I think the bug was associated only with Linux/Mac.

  My environment is:
  Java.Runtime.version = 1.7.0_06 - ea - b17
  JavaFX.Runtime.version = 2.2.0 - beta-b16
  Windows XP

  Load the project into NetBeans 7.1.2 generated a message she has been upgrading the project and let him build correctly was problematic (NetBeans couldn't find jfxrt.jar probably due to the old format or a version of NetBeans project prior to the Group Co of JavaFX and the JDK). Just, I went to the command line and ran the Ant to build the project from there, he built very well. After that, I followed the steps of test, that you have described and everything worked ok without printed exception.

  Published by: jsmith on July 12, 2012 16:27

  Update response based on the search for a known issue with Jira.