VAADIN and JavaFX

Similar Questions

• JDK 8 and JavaFX TabPane throwing NullPointerException

  Hi all. I hope this is the right forum for this. I want to preface this question by declaring that the following code works perfectly fine in JDK 1.7. The goal here is to create a component with a tab at the end tab (with the value text '+') so that whenever this tab is selected, the program creates a new tab in the tab pane. This feature works fine. The problem is that when you close the new tab via the X, it goes to the tab 'add,' creates a new tab, then survey the following NullPointerException in some code JDK (and the app shows now TWO new tabs that correspond to the exact same object):

  Execution using the C:\Program Files\Java\jdk1.8.0\jre/bin/java java.lang.NullPointerException at com.sun.javafx.scene.control.skin.TabPaneSkin platform $TabHeaderSkin.access$ 302 (TabPaneSkin.java:1040) of C:\Users\XXXXXX\Documents\NetBeansProjects\TestJavaFx\dist\run2082574567\TestJavaFx.jar...

  I cut down the trouble code bare minimum to view the issue, and it's as follows:

  (Incase it do not paste correctly, see here: [Java] package testjavafx; import javafx.application.Application; import javafx.bea - Pastebin.com)

  package testjavafx;
  
  
  import javafx.application.Application;
  import javafx.beans.value.ChangeListener;
  import javafx.beans.value.ObservableValue;
  import javafx.scene.Scene;
  import javafx.scene.control.Tab;
  import javafx.scene.control.TabPane;
  import javafx.scene.control.TabPane.TabClosingPolicy;
  import javafx.scene.layout.StackPane;
  import javafx.stage.Stage;
  
  
  public class TestJavaFx extends Application {
  
  
      private TabPane tabPane;
      private Tab addTab;
      private Tab currentTab;
  
  
      @Override
      public void start(Stage primaryStage) {
  
  
          //Create the tab pane and the 'addTab' for adding new tabs.
          tabPane = new TabPane();
          tabPane.setTabClosingPolicy(TabClosingPolicy.SELECTED_TAB);
  
  
          addTab = new Tab("+");
          addTab.setClosable(false);
          tabPane.getTabs().add(addTab);
  
  
          //Add a listener to listen for changes to tab selection.
          tabPane.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Tab>() {
              @Override
              public void changed(ObservableValue<? extends Tab> observable, Tab oldSelectedTab, Tab newSelectedTab) {
  
  
                  //If we change to the addTab create a 
                  //new tab and change selection.
                  if (newSelectedTab == addTab) {
                      //Create the new tab.
                      createNewTab();
                  } else {
                      currentTab = newSelectedTab;
                  }
              }
          });
          //Create a new tab for initial load of the app
          createNewTab();
  
  
          StackPane root = new StackPane();
          root.getChildren().add(tabPane);
  
  
          Scene scene = new Scene(root, 500, 500);
  
  
          primaryStage.setTitle("Tab Test");
          primaryStage.setScene(scene);
          primaryStage.show();
      }
  
  
      /**
       * @param args the command line arguments
       */
      public static void main(String[] args) {
          launch(args);
      }
  
  
      private Tab createNewTab() {
          Tab newTab = new Tab("New Tab");
          newTab.setClosable(true);
          tabPane.getTabs().add(tabPane.getTabs().size() - 1, newTab);
          tabPane.getSelectionModel().select(newTab);
          return newTab;
      }
  
  
  }
  

  Does anyone have ideas on this? Why it would break in 1.8? Is there a bug in the JDK?

  It's clearly a bug in the code of TabPaneSkin. What seems to be the case, it's that the tab is removed before the end of the deletion tab animation. The problem may be exacerbated by the code by automatically adding a tab if the last tab is deleted, but the code base should not fall like that.

  To work around the issue, disable the close animation of the tab with the following CSS bit.

  tabPane.setStyle ("- fx - close-tab-animation: none ;"); ")

  I created https://javafx-jira.kenai.com/browse/RT-36443 to follow up the matter.

• simultaneity and javafx.beans.property

  I am building a MVC architecture and I would like to model runs independently of the view/controller, for the model works with the controller/view.
  
  the following example is a very simplified version on how I got it:
  
  controller:

  public class controller extends AnchorPane implements Initializable{
       private ObjectProperty<Model> m;
       @FXML Label aLabel;
       
       public controller() throws Exception{
            this.m = new SimpleObjectProperty<Model>(this, "Model", null);
            FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("../view/View.fxml"));
            fxmlLoader.setController(this);
            fxmlLoader.setRoot(this);
            fxmlLoader.load();
       }
       @Override public void initialize(URL arg0, ResourceBundle arg1){}
       public void setGame(Model m) throws Exception{
            this.m.set(m);
            aLabel.textProperty().bind(this.m.get().getIntProperty().asString());
       }
       public void start(){
            //Method1:
            m.get().start();
            //Method2:
            Task<Void> task = new Task<Void>() {
                 @Override public Void call() {
                      m.get().start();
                      return null;
                 }
            };
            new Thread(task).start();
            //Method3:
            m.get().start();     //Model extends Thread and public void start() to protected void run()
            //Method4:
            m.get().start();     //Model extends Task<Void> and
                           //public void start() to protected Void call() throws Exception
            //Method5:          //calling any of the before ones on the controller that calls this one
       }
  }

  model:

  public class Model extends Thread{
       IntegerProperty intProperty;
       
       public Model(){
            this.intProperty = new SimpleIntegerProperty(0);
       }
       public IntegerProperty getIntProperty(){
            return intProperty;
       }
       public void start(){
            while (true){
                 this.intProperty.set(this.intProperty.get()+1);
            }
       }
  }

  I tried one of those and the results are:
  -Method1: the display is blocked and cannot be seen anything (model seems to work since ongoing in the loop)
  -Method2: when arrives the first this.intProperty.set (this.intProperty.get () + 1); the task is frozen and stops
  -Method3: error running on this.intProperty.set (this.intProperty.get () + 1);
  -Remplacement4: same as Method3
  -Method5: as before those
  
  How can I make the computer works?

  There are a few things wrong here.

  First of all, if you want the model to use a wire, make sure that you know how to use the Thread class. There is a decent section on concurrency in the Java tutorial [url http://docs.oracle.com/javase/tutorial/essential/concurrency/index.html]. What you need here, it's that your model class to override the run(), not the start() method method. Call then the start() method, which will cause the run() method run on a separate execution thread. (You can do this in method 3, I didn't understand your comment)

  It's probably just an artifact of your simplified version, but your run() method should block at some point. Multiple threads can be run on the same processor, if your current implementation can hog this CPU, it is impossible for the FX Application thread to do its stuff. For the test, throw in a call to Thread.sleep (...), wrapped in a try/catch block for the InterruptedException. I guess the real application expects something from the server, so there would be some "natural" the thread to block in this case.

  Important rule for the user interface is that changes made to the interface should be made only on the FX Application thread. Assuming you have the implementation of your model correctly running on a background thread, you violate it with your binding. (The model defines its intProperty on the background thread, the link causes the text of the label to change on the same thread). So to solve this problem your controller should listen to property int of the model changes and schedule a call to aLabel.setText (...) on the FX using Platform.runLater (...) application thread. You want to make sure that you do not flood the Application FX thread with too many such calls. Depending on how often the int in the model property is get updated, you discussed techniques in {: identifier of the thread = 2507241}.

  The tasks of JavaFX API provides friendly mechanisms to remind the JavaFX Application thread; However it is not really applicable in this case. The task class encapsulates a one-time job and (optionally) return a value and then ends, which is not what you're doing here.

  Here is a complete example; He is not broke in separate FXML for display and a controller, etc., but you can see the structure and break it down according to your needs.

  import javafx.application.Application;
  import javafx.application.Platform;
  import javafx.beans.property.IntegerProperty;
  import javafx.beans.property.SimpleIntegerProperty;
  import javafx.beans.value.ChangeListener;
  import javafx.beans.value.ObservableValue;
  import javafx.event.ActionEvent;
  import javafx.event.EventHandler;
  import javafx.scene.Scene;
  import javafx.scene.control.Button;
  import javafx.scene.control.Label;
  import javafx.scene.layout.AnchorPane;
  import javafx.stage.Stage;
  
  public class ConcurrentModel extends Application {
  
    @Override
    public void start(Stage primaryStage) {
      final AnchorPane root = new AnchorPane();
      final Label label = new Label();
      final Model model = new Model();
      model.intProperty.addListener(new ChangeListener() {
        @Override
        public void changed(final ObservableValue observable,
            final Number oldValue, final Number newValue) {
          Platform.runLater(new Runnable() {
            @Override
            public void run() {
              label.setText(newValue.toString());
            }
          });
        }
      });
      final Button startButton = new Button("Start");
      startButton.setOnAction(new EventHandler() {
        @Override
        public void handle(ActionEvent event) {
          model.start();
        }
      });
  
      AnchorPane.setTopAnchor(label, 10.0);
      AnchorPane.setLeftAnchor(label, 10.0);
      AnchorPane.setBottomAnchor(startButton, 10.0);
      AnchorPane.setLeftAnchor(startButton, 10.0);
      root.getChildren().addAll(label, startButton);
  
      Scene scene = new Scene(root, 100, 100);
      primaryStage.setScene(scene);
      primaryStage.show();
    }
  
    public static void main(String[] args) {
      launch(args);
    }
  
    public class Model extends Thread {
      private IntegerProperty intProperty;
  
      public Model() {
        intProperty = new SimpleIntegerProperty(this, "int", 0);
        setDaemon(true);
      }
  
      public int getInt() {
        return intProperty.get();
      }
  
      public IntegerProperty intProperty() {
        return intProperty;
      }
  
      @Override
      public void run() {
        while (true) {
          intProperty.set(intProperty.get() + 1);
          try {
            Thread.sleep(50);
          } catch (InterruptedException exc) {
            exc.printStackTrace();
            break;
          }
        }
      }
    }
  }
  

• With the help of vector graphics with fxml and JavaFX

  HY
  
  I wonder about the use of vector graphics scalable, svg, files in my project JFX.
  I know how to display the png with an imageview images and who can handle via CSS style (like fx-background-image)
  But for now, I want to add a vector graphic to my scene.
  I'm not shure if I use .ai, .svg or other file formats and how to load that.
  
  I read on SVGGraph but failed to get the idea behind it
  (and think that's not for files)
  
  So please can someone tell me how single charge and show a graphic vector and formaterait which should take?
  
  Ah: A way to make this replaceable graph via CSS style would be nice too ;)
  
  Thank you
  
  BR

  This .fx file is probably the old 1.x JavaFX, which is no longer supported for JavaFX 2.x and to my knowledge there is also no converter for this.

• NetBeans plugin 7 and JavaFX

  I'm the only person who can not get the JavaFX plugin to work with Netbeans 7?
  
  Downloaded 7 NB
  Installing Javafx 2.0 runtime
  Downloaded and installed the plugins nb javafx 2.0 according to the installation instructions.
  
  Then by restarting gives errors on the NB plugins - that must be disabled before you continue.
  
  Tried on both PC and had the same problem. Nb plugins seems to destroy the basic features in Netbeans (cannot create new projects)

  It worked for me:
  1 uninstall Netbeans 7.
  2 install Netbeans 7.
  3. start Netbeans and go to tools-> Plugins
  4. the new updates should appear. Install them. See patch info here http://wiki.netbeans.org/NetBeans7.0PatchesInfo
  5 install the JavaFx plugins

• After downloaded java java 7 and javaFX my pc has become demonized, why?

  now it takes 10 minutes to start, forever for MSE to kick in. I am a lost.would that goes back to java 6 n 39 do better. Ty hagd stay cooler

  Hi philwhitesell,

  Follow these methods.

  Method 1: Uninstall and reinstall the Java application.

  Method 2: Follow these steps:

  Step 1: Start the computer in safe mode and check if the problem persists.

  Step 2: If the problem does not still in safe mode, perform a clean boot to see if there is a software conflict as the clean boot helps eliminate software conflicts.

  Note: After completing the steps in the clean boot troubleshooting, follow the section How to configure Windows to use a Normal startup state of the link to return the computer to a Normal startupmode.

  After the clean boot used to resolve the problem, you can follow these steps to configure Windows XP to start normally.

  (a) click Start, run.

  (b) type msconfigand click OK.

  (c) the System Configuration Utility dialog box appears.

  (d) click the general tab, click Normal startup - load all services and device drivers and then click OK.

  (e) when you are prompted, click restart to restart the computer.

  Method 3: Performs a search using the Microsoft safety scanner.

  http://www.Microsoft.com/security/scanner/en-us/default.aspx

  Note: The data files that are infected must be cleaned only by removing the file completely, which means that there is a risk of data loss.

  For reference:

  Slow PC? Optimize your computer for peak performance

  How to make a computer faster: 6 ways to speed up your PC

• problem of JavaFX and javascript

  Hello
  
  I work with Javafx and facing a problem regarding the javafx and javascript event. I use WebView of javafx and points associated with the application of the swing.
  I'm passing a url and be able to view the Web page.
  
  The Web page contains a button that has a validation. After clicking on a popup alert is supposed to be opened against this validation.
  
  But the alert does not come.
  could you please enlight on it.
  
  Kind regards
  Dev.

  Note that your question belongs in the forum later and JavaFX 2.0 not 1.x forum JavaFX (JavaFX 1.x did not have a WebView).

  JavaFX 2.0 and later versions «JavaFX 2.0 and later forum»

  ---------------

  To get windows pop up for WebView, you must implement an appropriate Manager.
  Perhaps a future version of a WebView will provide implementations by default of these dialog boxes, but there is currently no default behavior for many of these methods in JavaFX 2.2 (i.e. basically they are simply ignored).

  See WebEngine methods:
  setOnAlert
  setPromptHandler
  setConfirmHandler
  setCreatePopupHandler

  For your example, you probably want to predict an EventHandler setOnAlert that creates a new dialog box that contains the alert information.

  For example, the following code displays a couple of alerts when the user triggers them by pressing a button html with a javascript onclick handler:

  import javafx.application.Application;
  import static javafx.application.Application.launch;
  import javafx.event.EventHandler;
  import javafx.scene.Scene;
  import javafx.scene.control.Label;
  import javafx.scene.layout.StackPane;
  import javafx.scene.web.*;
  import javafx.stage.*;
  
  public class WebViewWithPromptHandler extends Application {
    public static void main(String[] args) { launch(args); }
    @Override public void start(final Stage primaryStage) {
      WebView webView = new WebView();
      webView.getEngine().loadContent("Popup");
      webView.getEngine().setOnAlert(new EventHandler>() {
        @Override public void handle(WebEvent event) {
          Stage popup = new Stage();
          popup.initOwner(primaryStage);
          popup.initStyle(StageStyle.UTILITY);
          popup.initModality(Modality.WINDOW_MODAL);
  
          StackPane content = new StackPane();
          content.getChildren().setAll(
            new Label(event.getData())
          );
          content.setPrefSize(200, 100);
  
          popup.setScene(new Scene(content));
          popup.showAndWait();
        }
      });
  
      final Scene scene = new Scene(webView);
      primaryStage.setScene(scene);
      primaryStage.show();
    }
  }
  

  -----------

  If you want to use predefined and model logic of dialogue to set your WebView dialogue management, then refer to the ControlsFX project:
  http://fxexperience.com/controlsfx/

• Differences between JavaFX CSS and css w3c standard

  This is a discussion topic that comes to mind after reading the comments in this thread Re: FXML, css and - fx-are-family
  
  Feel free to comment or share your ideas on the subject.
  
  Note that these comments relate to the meaning of assignment of names and semantics of the css tags and not the syntax and parsing of css (such as the w3c css and css javaFX seem to be equivalent with respect to later).
  
  You know, sometimes I find refreshing absence of JavaFX features in css. It is nice to have, well, almost everything, the JavaFX CSS documented on one page. I think that if you were to do the same for the w3c css then it would end up with a much bigger, more difficult to understand the document and even what should be the content of this document would probably quite controversial, in the same kind of way that ends up being the HTML5 specification. Microsoft has helped more than 7,000 w3c tests just to cover only a subset of css rules that are available in browsers today. The webkit project lists open CSS nearly a thousand bugs: https://bugs.webkit.org/buglist.cgi?product=WebKit & component = CSS & resolution =-. If the implementation even partial w3c CSS support is a complex project.
  
  When I started using JavaFX CSS I found differences in w3c CSS quite shocking, and it was difficult to account for their. Now that I'm used to JavaFX CSS, I don't have as much of a problem. The difference in names and semantics will be an obstacle to working on JavaFX developers who are familiar with w3c CSS - but the designers quickly will also discover that FXML is not HTML and Java isn't JavaScript and JavaFX deployment is not HTML deployment. Then, perhaps, in the bigger picture, it is not as big a deal that he would appear. Yet, one cannot think that any obstacle to the people easily pick up and adopting JavaFX makes the technology a disservice.
  
  There are other benefits that the JavaFX CSS in its own space of names to w3c css, in what she can evolve separately, it shouldn't be exactly the same because it has a different name, it should not implement fully w3c css as browsers do so because it is clearly something different by name etc. There is even precedent for it in the use of mozilla to moz - CSS and css properties http://css-infos.net/properties/webkit - web webkit prefixes as not in standard as many people have suggested. JavaFX CSS supports a JavaFX rendering engine and not an HTML rendering engine. It is quite remarkable that Oracle has been able to build and make available a model CSS for JavaFX which feels as familiar as to the w3c css, w3c css is very strongly targeted towards style a game completely different technology (HTML markup document object model and).
  
  It would be useful to have a tool which translates as w3c css to the approximations of JavaFX css and vice versa, or the ability for JavaFX to have a mode (perhaps a Boolean value when a style sheet is loaded) to perform an automatic alias or the mapping of the w3c css for javafx (at least for the subset of w3c css that would make sense to automatically translate for JavaFX css). I haven't checked the jira JavaFX in detail, then maybe a request for support already exists - it's perhaps in the private http://javafx-jira.kenai.com/browse/RT-9272 jira.
  
  The JavaFX css model is really powerful and I found really useful some of the additions that it adds above the css 2.1 Basic found regularly in browsers. With the next CSS Java model object http://javafx-jira.kenai.com/browse/RT-17293, you will also better get access by Java programming.
  
  Then, good work on the construction and implementation of this complex device...

  Thanks for the comments. The gap between JavaFX CSS and CSS from W3C will be an evolutionary process. It would be nice to use the stylesheet of a standard basis, but there is not always a mapping from 1-1 to JavaFX. But for properties that can be mapped, it is something that should be supported. For example, we should be able to deal with 'police' or '- fx - police '.

  I made public http://javafx-jira.kenai.com/browse/RT-9272.

• Public access to the JavaFX Jira?

  Hello world

  Surely I'm missing something obvious but... Does anyone know how to get the JavaFX Jira? : https://javafx-jira.kenai.com

  I need to create an account? Where?

  Thank you

  Marc

  Hey mark,.

  Missing probably not something obvious.  My guess is that they stopped allowing automatic registration for the current tracker. The independent instance of JIRA you accessed is deleted and JavaFX bugs are migrated to JBS.  The target date for the migration to complete is June 5.  After that bugs can anonymously view-through JBS:

  https://bugs.OpenJDK.Java.NET/secure/dashboard.jspa

  There are 2 ways to submit bugs in the JBS system.

  (1) If you have an author JBS status, you will have an account JBS and can submit bugs directly.

  (2) any person may submit bugs via the Bug database.

  I just checked and it seems that there already is an option to choose JavaFX when using bugs.java.com.  If you submit a bug, you might try it.  I have not used yet, so if you submit a bug, I'd be interested to hear how it works.  Ex: What kind of confirmation you get, how there are mapped in JBS, do you get notifications by e-mail updates, etc. ?

  If you are looking for a specific bug, I don't see a way to view them at the present time.  All existing bugs will be added to the JBS, and after migration, should be accessible via the bug current IDs.  There's more info here:

  JavaFX JIRA to JBS questions June 5

• Creating a JavaFX 8 front-end application using command line tools.

  I'm sure this has been asked and answered, but the deluge of search results I get from Google and Bing do things much more confused than they already are.

  I'm finally taking the plunge and spend C/C++ and Python for the Java SE and JavaFX 8 platform.  I am the creation of user interface running on top of the back-end tools that can run from seconds to days and output GB of data generated (imagine the tar running on Google's servers).

  I understand how to run my tools saved using a running process and how to interact with them and operate a simple text like a command-line Java app as planned work.  This problem occurs when I wrap the code in a late snow JavaFX UI try to update the UI in a reasonable manner.  If I just use System.out.println () as in the command line version, I see the output of my task.  However, simply trying to put this same output in a text box using the. appendText() is not updated once the component TextArea until the background process completes.

  I see all kinds of press clippings related to the task, CreateProcess, invokeLater updateProgress, but none of them does not seem to resolve the issue of their original posters (or mine at this stage).

  Has anyone created a simple tutorial that is bound to this type of operation?  Pointers?  Better search terms?

  Thank you

  Tim

  For posterity:

  I found the answer to this - the class ProcessBuilder does everything need AND Lambdas make even easier!

  This discussion on StackOverflow have me in the right direction:

  http://StackOverflow.com/questions/12361600/JavaFX-fxml-communication-between-application-and-controller-classes

• M3u8 sample Live Streaming HTTP plays don't not - stand-alone JavaFX 2.2.7 for java 1.6.0.32

  Hi all
  I searched high and low on the here and the wild wild web, but cannot find any support for my problem.

  I was testing my code of JavaFX2.2.7 Media Player based in a common Java 6 application when I discovered that HTTP Live Streaming does not seem to work.  I can play a local file of the format supported (Sintel trailor mp4 h264), but when I try and use a stream of Live HTTP instead, nothing plays. (for example http://download.oracle.com/otndocs/products/javafx/JavaRap/prog_index.m3u8 ).  I find myself with an empty drive and no exceptions or errors.

  private final static String MEDIA_URL = " " http://download.Oracle.com/otndocs/products/JavaFX/JavaRap/prog_index.m3u8 "; "

  Media = new Media (MEDIA_URL);

  MediaException ex = media.getError ();

  If (ex! = null) {}

  System.out.println ("Media error" + ex.getMessage ());

  } else {}

  System.out.println ("no media error");

  }

  Program the output to the console: "No. Media Error.

  I thought it was something wrong with my Player code, as a last resort, I went to JavaFX 2 - together and copied from the source and put it directly in my application and it ran... Unfortunately occurs the same result. The player runs, but simply shows a video window empty.  Controls are available, but the video plays.

  Based on the release notes for Java 2.2.7 that I was under the impression that HLS has been supported.  Am I incorrect?

  I can't upgrade to Java 7 because I'm firmly stuck with Java 1.6.0.32 for lack of project.

  Can anyone provide any assistance would be greatly appreciated.

  Post edited by: 2b18d6de-8200-4adc-a82a-88fc0451f448 I've updated for JavaFX 2.2.21 and this has not fixed the problem.  The result is exactly the same.  No exceptions, no error and no video...

  My Conclusion: Http Live Streaming does not seem to work with JavaFX 2.2.7 or 2.2.21.

  I've proved since the problem lies with 2.2.7 JavaFX and JavaFX 2.2.21, and that by using the new JavaFX comes with Jre7 solves the problem.

  I created a completely new and added that the JavaFX jars comes with 7 project JRE on my road to build.  I copied the code from http://download.oracle.com/otndocs/products/javafx/2/samples/Ensemble/index.html#SAMPLES/Media/Streaming%20Media%20Player and it works.

  So, I made a few changes on my original Java Eclipse project.

  Removed the build path:

  -C:\Program Files (x 86) \Oracle\JavaFX 2.2 Runtime\lib\jfxrt.jar

  -C:\Program Files (x 86) \Oracle\JavaFX 2.2 Runtime\lib\javaws.jar

  -C:\Program Files (x 86) \Oracle\JavaFX 2.2 Runtime\lib\plugin.jar

  -C:\Program Files (x 86) \Oracle\JavaFX 2.2 Runtime\lib\deploy.jar

  Added to build the path:

  -C:\Program Files (x86)\Java\jre7\lib\jfxrt.jar

  -C:\Program Files (x86)\Java\jre7\lib\javaws.jar

  -C:\Program Files (x86)\Java\jre7\lib\plugin.jar

  -C:\Program Files (x86)\Java\jre7\lib\deploy.jar

  Always using the 1.6.0_32 Java runtime, I ran my application and everything worked.

  Of course, this will be like a giant hack. I am disappointed by the release notes for JavaFX 2.2.7.

  NOTE: To export my request as an executable Jar, I also had to pull the related JavaFX ".dll" JRE 7 libraries and add them to the java.library.path (using script commands) before running the jar.

• JavaFX 2.2 equivalent to repaint() swing?

  Hello

  I am new to this forum and javafx.

  I'm very experienced in java, swing (and I used for the design of the JAVA virtual machine in a previous life for embedded mobile systems.including).

  Are there restrictions on when the JFX application is authorized to acquire a graphics context and to drawing on a canvas? (swing provides repaint() to plan graphic activity by the app). Must be present always could start via a UI control event handler?  In general, I wantr to draw on a canvas in response to several different triggers, including the control of based UI.

  I tried a few artisanal animation on the JFX App thread, with interesting results.

  If I use an AnimationTimer and tap into its recall, all right.

  Before that, I discovered, I tried intiially by own hack, with a small loop involving sleep() for 50ms and then by drawing.  This loop is triggered in response to a button event handler.  So, we are all still in the context of the App thread.  It did not work... the canvas layout screwed to the top, and no chart didn't seem in it.

  So, please can you answer 2 questions.

  1 / is there honor restrictions, and if so, where can I find these documented?  I have spent a lot of time to research the oracle site, with no luck.  For the real product, I develop, I need especially to know if there are problems with another thread by sending requests to the application thread, work that leads finally to the graphic.

  2 / the above behaviour may involve livelocks occur (somehow the wire of the ability to conduct its business of hunger), or behind the scenes ongoing thread synchronization that I managed to disrupt.  I saw very high level mention to Don for the JFX architecture.  Is there an explanation please?

  Thank you very much

  Jerry Kramskoy

  It is not too much that you need to know.

  The tutorial has a short section on threads in the section Architecture of JavaFX. API for node documentation describe the restrictions on what needs to be done on the Thread of the JavaFX Application:

  Node objects can be built and modified on any thread as long as they are not yet attached to a Scene . An application must determine nodes on a scene and change nodes that are already attached to a scene on the Thread of the JavaFX Application.

  Your canvas is a subclass of node, so cannot be changed on the Thread of the JavaFX Application. There is a Platform.runLater (...) method that can be invoked from threads to ask a Runnable run on the Thread of the JavaFX Application user-defined (this is similar to SwingUtilities.invokeLater (...)).

  The other important rule, of course, is that you must not block the Thread of the JavaFX Application. It looks like the loop that you describe might have done this ("we are all still in the context of the App thread").

  The javafx.concurrent package has a set of useful classes and interfaces for code execution in a background thread. For example, the Task class is an implementation of FutureTask providing also several callback methods that are called on the JavaFX Application Thread. One way to realize an animation that has updated the user interface at a specified interval would be to create a task with a set of a onSucceeded a Manager to update your canvas and then move this task to the scheduleAtFixedRate (...) method of a ScheduledExecutorService. See also the tutorial of JavaFX to competitive access .

  One last thing to note is that there are a javafx.animation package, which essentially has APIs to change the properties over time and to update the values of these properties on the JavaFX Application thread. You can make animation, for example, to create a timeline that modifies its translateX and translateY of a node properties. According to the animation that you are implemented, it's perhaps easier to roll your own loop animation and editing a Web. See the JavaDocs and the tutorial.

  In your example, things work very well using the AnimationTimer, that its handle (...) method is called on the Thread of the JavaFX Application. I'm not quite clear what happened when you tried to use your own loop, but either the loop was running on the Thread of the JavaFX Application, block it and it prevents to be part of its normal work, or you start a new thread and try to update the drawing area, breaking the rules on the threads and the scene graph.

  Note that if this can help. Maybe after a short example illustrating what you try to do it if not.

• FXML and son

  I have a file FXML which establishes certain elements on a Panel.  Since there are multiple instances of the Group of experts who are assembled together (think it's a VBox with multiple cards), I did experiences of ways to initialize the panels in their own net.  The bulk of the work, it's that it should:

  1. Load the fxml
  2. initialize the component with data from the database.
  3. return the initialized component so that it can be added to the VBox.

  My initial assumption was that I could stick it in the method of work #call , but I immediately got an exception because the FXML charger wasn't on the thread of the application.  is there a reason any loading configuration of a component must be on the application thread?  Ideally, he should care only when I try to add this element to the graphic scene.

  To work around this problem, my task overrides the Task #scheduled () method to initialize the FXML charger Panel.  It uses the call() method to construct a model for the chart and then use the succeeded() method to bind the model to the table.  Given that both on-demand and managed are supposed to be on the thread of the application, it should work.

  My assumption was that behind the scenes, the task was running the methods in the following order: regular, call succeeded or failed , as the case may be.  However, when I try to get the Panel returned by the call to method, I still get null.  As I call the task using the ThreadPoolExecutor and get a future, I expect that the future should always give me the results of the method call, and it would be non-zero since the Panel is initialized in the regular method.

  Am I missing something?

  > You would think you could do something (the values of the field of play, set of attributes for components) out of the thread of the application.

  Yes, one might think that, but, no, you can't for popup controls associates.

  > The exception I received was thrown when adding a context menu.

  I logged a bug report on it years ago:

  https://JavaFX-JIRA.Kenai.com/browse/RT-17716 "some controls can only be created on the FX application thread.

  It is a problem because things like a ContextMenu or the ToolTip are implemented in the form of PopupControls with their own windows and JavaFX, currently windows must be created on the JavaFX application thread.  Sprittibee found a hack (mentioned in the comments on the jira below), set your own skin that differs from the creation of the pop-up window, but I'm not sure I want to do.

  https://JavaFX-JIRA.Kenai.com/browse/RT-25127 "ToolTip tab (and other controls) can be defined in FXApplicationThread.

• What is Toolkit.gettoolkit of JavaFX?

  There is something I don't understand.
  
  Which of

  Toolkit.getToolkit()

  for?
  
  I thought that using the following, I could force a refresh of the scene

  Toolkit.getToolkit().requestNextPulse()

  And assistance

                  Toolkit.getToolkit().addSceneTkPulseListener(new TKPulseListener() {
  
                      public void pulse() {
                          System.out.println("Scene pulse.");
                      }
                  });
                  Toolkit.getToolkit().addStageTkPulseListener(new TKPulseListener() {
  
                      public void pulse() {
                          System.out.println("Stage pulse");
                      }
                  });

  I could became auditor of stage/internship.
  
  How can I force a refresh of the scene? I have a swing-javafx application that has some problems refreshing javafx scene.
  
  Thank you very much!
  
  Published by: 945671 on July 11, 2012 12:08

  Hey,.

  It is not in a JavaDoc on purpose :-). You should not rely on Toolkit in some way, shape, or form. It can be there in the next version - you never know! It is not part of the public API. ONLY Listed in the JavaDocs API is considered to be public API and reliable API, all the other (more precisely all that is @Deprecated, impl_, @treatasprivate, and javafx.* *) is not supported and should never be used.

  The best thing to do is to boil until a reproducible test and we can see what is happening.

  Thank you
  Richard

• NullPointerException running the example of JavaFX 2 tutorial

  Hello world
  
  I'm new to JavaFX 2 and I started to try the tutorial example. If I run it, I get a NullPointerException.
  Can someone explain what I'm missing? I copied the code is thus made no changes. Thank you in advance for your help!
  
  ""C:\Program Files\Java\jdk1.7.0_02\bin\java"- Didea.launcher.port = 7532 «-Didea.launcher.bin.path=C:\Program files (x 86) \JetBrains\IntelliJ IDEA Community Edition 11.0\bin" - Dfile.encoding = UTF-8 - classpath "C:\Program Files\Java\jdk1.7.0_02\jre\lib\alt-rt.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\charsets.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\deploy.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\javaws.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\jce.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\jsse.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\management-agent.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\plugin.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\resources.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\rt.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\ext\dnsns.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\ext\localedata.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\ext\sunec.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\ext\sunjce_provider.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\ext\sunmscapi.jar; C:\Program Files\Java\jdk1.7.0_02\jre\lib\ext\zipfs.jar; C:\Program Files\Java\JavaFX 2.0.3 SDK\rt\lib\jfxrt.jar;D:\Entwicklung\IdeaProjects\Test\out\production\Test; "C:\Program Files (x 86) \JetBrains\IntelliJ IDEA Community Edition 11.0\lib\idea_rt.jar ' com.intellij.rt.execution.application.AppMain fxmlexample. FXMLExample
  Exception in the method of Application startup
  Exception in thread "main" java.lang.RuntimeException: Exception start Application, method
  at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:378)
  to com.sun.javafx.application.LauncherImpl.access$ 000 (LauncherImpl.java:27)
  to com.sun.javafx.application.LauncherImpl$ 1.run(LauncherImpl.java:97)
  at java.lang.Thread.run(Thread.java:722)
  Caused by: java.lang.NullPointerException
  at javafx.fxml.FXMLLoader.load(FXMLLoader.java:1749)
  at javafx.fxml.FXMLLoader.load(FXMLLoader.java:1743)
  to fxmlexample. FXMLExample.start (FXMLExample.java:47)
  to com.sun.javafx.application.LauncherImpl$ 5.run(LauncherImpl.java:298)
  to com.sun.javafx.application.PlatformImpl$ 4.run(PlatformImpl.java:152)
  to com.sun.javafx.application.PlatformImpl$ 3.run(PlatformImpl.java:119)
  at com.sun.glass.ui.win.WinApplication._runLoop (Native Method)
  in com.sun.glass.ui.win.WinApplication.access$ 100 (WinApplication.java:29)
  to com.sun.glass.ui.win.WinApplication$ $2 1.run(WinApplication.java:62)
  ... 1 more
  
  Process is completed with exit code 1

  So this means JavaFX is made only for Netbeans and does not run in other IDEs?

  No, the other IDEs can build and run JavaFX applications.
  For Oracle JavaFX samples, it is just easier to use NetBeans because they have already defined NetBeans projects.

  I created a project idea which includes the NetBeans project, added sources has the JavaFX runtime library for the project Idea (C:\Program Files\Oracle\JavaFX 2.1 Runtime\lib\jfxrt.jar), adjusted settings-online settings idea | Compiler | Patrons of resources to add;? *.fxml, you press Run and, even once, the sample ran without problem.

  Idea is a bit limited by default when copying of resources, for example, you must add explicit reasons to copy things like css and javascript output directories for files.

  Without the model copy of resource fxml when developing applications based in the idea fxml, JavaFX 2.1 will not be able to find the fxml file because it is not copied during the compilation of the project output directory and JavaFX 2.1 raise an error when it runs:
  java.lang.IllegalStateException: location is not defined
  The error message can be a bit nicer and mention the path that cannot be found, but it makes sense.