F8TXXODBJ34 of Code of safety arose randomly

Similar Questions

• Lingo code to display a random number

  I learn the Director and my partner and I even try to write the lingo code for when a button is clicked, a random number between 1 and 6 is displayed in a text field. Can someone help me? I tried the code using the Director that is written: diceroll = (random (6) + (6) randomly). We want her to die alone, so we didn't add the second random (6), but we were not able to understand what we should put in the code. Thank you.

  If you have a text cast member or a field named "Field Die1" then

  Member ("Die1 Field"). Text = string (random (1.6)) will work. Are you sure youm
  Member name the correct spelling? What error do you get?

• Question on code generation of random characters.

  I did this code to generate a random key for a registration system, I get an error and can not seam to understand why, if anyone can help that would be great. Here is the code:

  function random_char ($string) {}
  $length = strlen ($string);
  $position = mt_rand(0, $length-1);
  Return ($String [$position]);
  }
  function random_string ($charset_string, $length) {}
  $return_string = "";
  for ($x < $length $x ++);

  ↑ This is line 23 here...

  $return_string. = random_char ($charset_string);
  Return ($return_string);
  }
  mt_srand ((double) $arr () * 1000000);

  $charset = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 ';
  $random_key = random_string ($charset, 30);

  Here is my error:

  Parse error: error of syntax, waiting for unexpected T_VARIABLE, expecting ';' in /home/jewuypq/public_html/budget/scripts/p_reg.php on line 23

  Booth wrote:

  You probably want something like:

  for ($x = 1; $x< $length;="">

  Close. It should be this:

  for ($x = 0; $x < $length; $x++) {
    // loop code goes here
  }
  

  The meter shall start at 0. If he starts to 1 you need this:

  for ($x = 1; $x <= $length; $x++) {
    // loop code goes here
  }
  

  The average condition becomes ' less than or equal to ".

• Help button random code

  I work with a small flash file that plays a short animation that ends on the 42 and poster frame button.
  
  The button has the following code:
  
  on (release) {}
  var random = (6) accident;
  If (coincidence == 1) {}
  tellTarget ("") {}
  gotoAndPlay (43);
  }
  }
  If (coincidence == 2) {}
  tellTarget ("") {}
  gotoAndPlay (44);
  }
  }
  If (coincidence == 3) {}
  tellTarget ("") {}
  gotoAndPlay (45);
  }
  }
  If (coincidence == 4) {}
  tellTarget ("") {}
  gotoAndPlay (46);
  }
  }
  If (coincidence == 5) {}
  tellTarget ("") {}
  gotoAndPlay (47);
  }
  }
  If (coincidence == 6) {}
  tellTarget ("") {}
  gotoAndPlay (48);
  }
  }
  }
  
  
  6 next executives (43-48) have different videos on them and a stop actionscript. And when the user clicks the button movie clip a frame 42 will play randomly and then after finishing dates back to 42 frame and displays the button again.
  
  The flash works perfectly, except the button plays only random video clips on frames 43-47. He is ignorant of 48 frame.
  
  Does anyone have any ideas as to why?

  I do not understand why tellTarget("") {...}
  I don't understand why if... If... If... If... If...
  I do not understand why not

  on (release) {}
  var zufall:Number = 43 + Math.floor (6 * Math.random ());
  gotoAndPlay (accident);
  }

  to set all...

  If you use AS1

  on (release) {}
  coincidence var = 43 + random (6);
  gotoAndPlay (accident);
  }

• Code could not be sent to my phone for verification purposes?

  Hello

  When checking that my account security code no longer can be sent to my phone by SMS. I had no problems until today. I can always get a code sent to my alternate email address, but the text of my phone option no longer works. Can someone advise? Ive read just an alert on my Microsoft Account page saying that ive asked too many codes for that phone number already. You are allowed to receive a certain number of codes per day or something? If so is it limited on codes of safety sent by email as well? Thanks in advance

  Can connect you to your Microsoft account now or...?

  CF. http://answers.microsoft.com/en-us/windows/forum/windows_8-windows_update/windows-update-troubleshooting-report-questions/35c6ad73-f82e-4c31-9216-8f30710b1a14

• When I click on a single line of code, dreamweaver highlights the major sections of the unrelated code.

  I'm having a problem suddenly after upgrading to Dreamweaver CC 2014.1.1, this morning. Now when I try to choose a single line of code, Dreamweaver highlights the random code blocks. I tried different mouse, wired and wireless, thought that might be the cause, but not luck.

  Is there a preference I selected by mistake I don't know?

  Thanks for any help.

  The problem continued in Live and modes of creation.

  I fixed it by reinstalling Dreamweaver. Works like a charm. Fortunately, I had my preferences saved, so he did not so much time to get back to work because I thought it might.

  Thanks for your help!

• Press the button to display a random image

  Hello

  I'm used to working with the timeline and don't often go into the side of the things actionscript.

  I created a second animation 60 an hourglass timer countdown, and next to him, is a map showing a Word. I need this whole animation to play when you press a button 'start game' and also I need the word on the card to be a word at random. All the words are saved as separate vector files for now.

  What is the best way to handle this in the timeline, and what would be the code to display a random image?

  The only discussion I found on these are memory games and they are more complex for what I need!

  I just thought I would put the answer incase anyone needs help with that.

  In the end, I added each image as a picture on the same layer in a clip and added a stop(); action to each image.

  I added this line of code for the keyframe with the movieclip on the timeline:

  This. MovieClipName.gotoAndPlay (Math.round (Math.random () * 4));   4 set up the number of images that you have in the movieclip

  Works great so far - I'll let know you if he throws up additional problems

• Need help random number, if-then AS3

  I found the online AS3 code to generate a random number between 0 and 1.  It looks like this:

  function randomNumber1(low:Number=0,_high:Number=1):Number

  {

  return Math.floor (Math.random () * (1 + high-low)) + low;

  }

  Then I made two buttons given blue1_btn and green1_btn instance names.  I tried to create a random guess the test button to go to another scene.  Here's the code I used for each with different button

  green1_btn.addEventListener (MouseEvent.CLICK, green1);

  function green1(event:MouseEvent):void {}

  if(randomNumber1 == 1)

  {

  gotoAndPlay("Win",1);

  }

  on the other

  {

  gotoAndPlay("Lose",1);

  }

  }

  The other subsitutes touches the word 'blue' where you see 'green' in the code above.

  When I have the test file, I get these errors:

  "* Error * Scene 1, layer green btn code ', frame 2, line 3:1176: comparison between a value with static type of function and may be unrelated to int type.

  if(randomNumber1 == 1)

  "* Error * Scene 1, layer green btn code ', frame 2, line 5:1180: call to a method may be undefined gotoandplay.

  gotoAndPlay("Win",1);

  "* Error * Scene 1, layer green btn code ', frame 2, line 9:1180: call to a method may be undefined gotoandplay.

  gotoAndPlay("Lose",1);

  * Error * scene 1, Layer 'code Blue btn', frame 2, line 3:1176: comparison between a value with static type of function and may be unrelated to int type.

  if(randomNumber1 == 1)

  * Error * scene 1, Layer 'code Blue btn', frame 2, line 5:1180: call to a method may be undefined gotoandplay.

  gotoAndPlay("Win",1);

  * Error * scene 1, Layer 'code Blue btn', frame 2, line 9:1180: call to a method may be undefined gotoandplay.

  gotoAndPlay("Lose",1);

  "* Error * Scene 1, layer green btn code ', frame 2, line 1:1120: access of undefined property green1_btn.

  green1_btn.addEventListener (MouseEvent.CLICK, green1);

  Total ActionScript errors: 7, reported errors: 7

  Read errors after seeing corrections below so that you gain a better understanding.  In addition, the arguments of gotoAndPlay are back in your code...

  function randomNumber1(low:Number=0,_high:Number=1):Number
  {
  return Math.floor (Math.random () * (1 + high-low)) + low;
  }

  green1_btn.addEventListener (MouseEvent.CLICK, green1);

  function green1(event:MouseEvent):void {}
  If (randomNumber1 () == 1)
  {
  gotoAndPlay (1, 'victory');
  }
  on the other
  {
  gotoAndPlay (1, 'lose');
  }
  }

• Modes of failure in TCP WRITE?

  I need help to diagnose a problem where TCP communication breaks down between my host (Windows) and a PXI (LabVIEW RT 2010).

  The key issues are:

  1... are there cases where to WRITE TCP, a string of say 10 characters, write more than zero and less than 10 characters for the connection? If so, what are those circumstances?

  2... is it risky to use a 1ms timeout value?  A reflection seems to say that I won't get a timeout in uSec 1000 if we use a database of time 1-ms, but I don't know if this is true in PXI.

  Background:

  On the PXI system, I use a loop of PID-100 Hz, controlling an engine.  I measure the speed and torque and control the speed and the throttle.  Along the way, I am in a position 200 channels of various things (analog, CAN, instruments of TCP) at 10 Hz and sending masses of info to the host (200 chans * 8 = 1600 bytes every 0.1 sec)

  The host sends commands, responds the PXI.

  The message protocol is a type of variable to fixed header, payload: a message is a fixed 3-byte header, consisting of a U8 OpCode and a USEFUL of U16 load SIZE field. I flattened a chain structure, measuring its size and add the header and send it as a TCP WRITE.  I get two TCP reads: one for the header, then I have the heading unflatten, read the SIZE of the payload and then another read for that many more bytes.

  The payload can be zero byte: a READING of TCP with a byte count of zero is legal and will succeed without error.

  A test begins by establishing a connection, configuration tips, and then sampling. The stream of 10 Hz is shown on the home screen for 2 Hz as digital indicators, or maybe some channels in a chart.

  At some point the user starts RECORDING, and 10 Hz data go into a queue for later write to a file. It is while the motor is powered through a cycle prescribed target speed/torque points.

  The registration lasts for 20 or in some cases for 40 minutes (24000 samples) and then recording stops, but sampling does not.  Data are still coming and mapped. The user can then do some special operations, associated with audits of calibration and leaks, and these results are stored.  Finally, they hit the DONE button and the mess is written to a file.

  This has worked well for several years, but that the system is growing (more devices, more channels, more code), a problem arose: the two ends are sometimes get out of sync.

  The test itself and all the stuff before configuration, works perfectly. The measure immediately after the test is good.  At some point after that, he goes to the South.  The log shows the PXI, sending the results for operations that were not opposed. These outcome data are garbage; 1.92648920e - 299 and these numbers, resulting from the interpretation of random stuff like a DBL.

  Because I wrote the file, the connection is broken, the next test he reestablished and all is well again.

  By hunting all of this, I triple-checked all my shipments are MEASURES of the size of the payload before send it.  Two possibilities have been raised:

  1... There is a message with a payload of 64 k.  If my sender was presented with a string of length 65537, it would only convert a value U16 1 and the receiver would expect 1 byte. The receiver would then expect another heading, but these data come instead, and we are off the rails.

  I don't think what is happening. Most messages are less payload of 20 bytes, the data block is 1600 or so, I see no indication of such a thing to happen.

  2... the PXI is a failure, in certain circumstances, to send the entire message given to WRITE of TCP.  If she sends a header promising more than 20 bytes, but only delivered 10, then the receiver see the header and wait more than 20. 10 would come immediately, but whatever the message FOLLOWING, it's header would be interpreted as part of the payload of the first message, and we are off the rails.

  Unfortunately, I'm not checking the back of writing TCP error, because she's never not in my test here (I know, twenty lashes for me).

  It occurs to me as I was him giving a value of timeout 1-mSec, since I am in a loop of 100 Hz. Maybe I should have separated the TCP stuff in a separate thread.  In any case, maybe I do not get a full 1000 uSec, due to problems of resolution clock.

  This means that TCP WRITE failed to get the data written before the time-out expires, but he wrote the part of it.

  I suspect, but newspapers do not prove, that the point of failure is when they hit the DONE button.  The General CPU on PXI is 2 to 5%, at that time there are 12 to 15 DAQ field managers to be close, so the instant the CPU load is high.  If this happens to coincide with an outgoing message, well, perhaps that the problem popped up.  It doesn't happen every time.

  So I repeat two questions:

  1... are there cases where to WRITE TCP, a string of say 10 characters, write more than zero and less than 10 characters for the connection? If so, what are those circumstances?

  2... is it risky to use a 1ms timeout value?  A reflection seems to say that I won't get a timeout in uSec 1000 if we use a database of time 1-ms, but I don't know if this is true in PXI.

  Thank you

  If a TCP write operation times out, it is possible that some data did in fact get placed in the buffer, and it will be read by the other side. This is why there is an output bytes written on TCP Write function, to determine what was actually put in the buffer.

  To account for this, you can proceed as follows:

  1. do an another TCP write and send only the subset of the first package that does not get completely passed. Use bytes written to Get String subset for the remaining data.

  2. start with greater delays.

  3. in the case of a timeout, the close link and force a reconnection so that the data of the partially filled buffer not get transformed by the other side.

• Entry of data in sequence through the "tab" key

  Hello

  So I created a lot of enum, string and digital data entry fields and they are all placed in the front panel.

  The only problem is when I start the program, I want the cursor position by default to be in the first field. After that, if the user presses the "tab" key, it should go to the next button and so on.

  In my code, it's fairly random, and I don't know of any way to change the order/sequence of fields so that the "tab" key moves the focus to the field next where I want it.

  Any help?

  Go to Edition and select "Command Tab" to set the order of Tab for your orders on the front panel.

• How can I change the name of the .png file saved when I create a HTML report?

  I have a report generation .vi that reads in several graphics and adds the 'photo' in the .html report. Is it possible to control how LabVIEW named the graphics .png resulting?

  I' worm attached a photo of the small piece of code and the generated automatically.

  Thank you!

  Hello

  The naming convention is designed to ensure that no conflict is generated that this generation of report class is called. Below, I've attached a screenshot of the feature that defines the names of the images.

  

  You can view this block diagram by double-clicking on and by opening the reporting tools. While you are free to modify this class to implement a new naming scheme, I have to insert the disclaimer that this process has bad effect on additional functions in the report generation tool. As you can see in this code, the names are randomly generated, then applied according to a random number. You might look into the implementation of a system that gets the label of the reference of the input control control and generates the path suitable for PNG images.

  I really appreciate your time. Please post any additional questions.

  Sincerely,

• Case of Structure / while loop problems

  Hello

  I am trying to write a code that draws a random number whenever a key is pressed.  The chart must be a random number on the y axis and the number of times that the button is pressed on the x-axis.  I want to draw the last twenty random numbers.  I use a while loop and a box structure.  If the button is pressed, the case structure incruments the number of times where the button is pressed and generates a random number.  I'm using shift registers to track the last twenty numbers generated.  When the key not, registers to shift to day values incorrectly.  My code is associated with this issue.

  I know that the last value of the shift registers of wiring to the structure of the case will change the table across the last value when the button is not pressed.  I know what causes the problem, but I don't know how to fix it.  I would appreciate it if you have a look and give me some tips.

  Thanks in advance.

  Your problem is that the loop runs continuously and your values in the shift register are replaced when you do nothing.

  There are a few ways around this.  It would be simpler to use a Structure of the event.  Another option is to simply store your table in the shiftregister.  Use Rotate 1-d Array and replace a subset of table to update your chart.  It is a little more robust and easier to use than using the history of the shift register.

  But the absolute simplest, based only on what you told us, just use a graphic instead of a graph.  A graph keeps a history.  The length of the default history is 1024 samples, then you want to reduce that to 20.  Then you just wire your random number right in the chart, and everything is done for you.

  

• Can't win the pocker game!

  Hi, everyone, you may think that it is a ridiculous problem.
  But I do not.

  My question is:
  Are all game sets are supposed to be there at least a way to clean up the game?

  I am very happy game of Poker of Win7 and it's really not easy more.
  I must say it's my favorite game now.
  But I can't win the game this time.

  I think you guys should add only a game in the game code.
  After, to random shuffle, there should be a code that made to challenge the same game.
  In my case, I might post the Web site code, others might enter the code to see the same game and try to solve it.
  I think it would be fun.

  Now, I need some advice to clear the game.
  I wonder how can I upload images to the Web site.
  Y at - it someone could help?
  Or through sort, you can reproduce the same game on my side.

  Hello

  Are you looking for cheaters?

  If so, try http://www.tucows.com/preview/608834

  Good luck $

• Noobie assistance

  Hello

  Before we buy a bb10 for testing, we are looking in how long it will take for our native android ndk to bb10 sdk set of port. have a few basic questions

  1. currently, using Simulator. However, eclipse the 'controller' may never sound auto detect the Simulator.

  2. connect directly on the Simulator in controller SEEMS to work. Be said down 'connected' however eclipse can never connect to the Simulator for debugging.

  3. the password for you connect to the Simulator... What is the default password or where I have the password, or where can change the password?

  4 can I use eclipse? I have this game running on android, ios and windows phone 8. I have an eclipse project, that I won't spoil and iOS and wp8 let me create projects and source code not in the folder of the reference project.

  4.1. using the plugin Visual Studio for blackberry will allow me to do similar? for example, create a project and reference the code source in another random section of the HARD drive?

  5. in the Simulator, which is the equivalent of the "home" button that will bring me to the main screen?

  6. How can I make the Simulator appear in landscape mode? all our applications are landscape I never need portrait.

  Thanks so much for a noobie to a veteran!

  EDIT: apparently it takes about 10 minutes for the Simulator warm up completely place... now eclipse auto discover. see if I can actually debug now. any help is very appreciated.

  Edit2: seemed to get an application by default installed but I can't debug get below error.

  Error in the final launch sequence
  Impossible to prepare and upload the binary file
  Failure of deployment: Info: request shipment: install and launch
  Info: Action: install and launch
  News: Native debugging: on
  Info: File size: 35590
  Info: installation

  3. There should not be a default password. You can set one of the Simulator, by going to 'Settings', choose 'Security and privacy' and 'device password.

  4. I'm sure you can do your own makefiles that basically just use QCC instead of gcc to compile. There could be sample makefiles, however I am not very familiar with it.

  4.1. I'm sure that you can, because Visual Studio can. I have not tested, but I think that if you choose to add an existing project item, there is an option to add a link.

  5. click on the black part on the bottom of the screen, and then drag up. You can find your applications by dragging to the left.

  6. I don't know.

  The link between the Simulator and the Momentics can be sometimes fragmentary. I can't help too much with that, except to say you must make sure that the Simulator debug configuration is active, maybe try a right click on your project and choose "Run as-> Run configurations", ensure that Simulator-debug is selected, here too and so your target Simulator. Click run.

  In regards to adding links in Momentics, you can certainly do the same. Right-click your src directory and choose "Import", "General-> file system", choose your directory and files, click "Advanced" and "create links in the workspace. Choose the options that suit you.

• Interesting things, however, strangers? StackPane, animations and filters.

  CHANGE (17/01/2014):

  
  

  As suggested by jsmith , I changed this thread so we could treat the on only one thing. Other issues that existed here before I put each in its own separate discussion. I hope that now we can deal with it properly, so start New:

  
  

  For the first test case, I tried to create a program that has some controls and I put a animated background behind her done with nodes in transition. With such a test, I received the following Visual result:

  
  

  http://s24.postimg.org/tk0psfm2t/programa_errado.jpg

  The background is made of white circles que increase and decrease more than time asynchronously. Notice how the interface (controls) is put on the top, and Unfortunately, it is not aligned for what is of the application window. Tthere resulting code from the image above can be seen below:

  
  

  import javafx.animation.Animation;
  import javafx.animation.KeyFrame;
  import javafx.animation.KeyValue;
  import javafx.animation.Timeline;
  import javafx.application.Application;
  import javafx.event.ActionEvent;
  import javafx.event.EventHandler;
  import javafx.geometry.Pos;
  import javafx.scene.Group;
  import javafx.scene.Node;
  import javafx.scene.Scene;
  import javafx.scene.control.Button;
  import javafx.scene.control.Label;
  import javafx.scene.control.TextArea;
  import javafx.scene.effect.GaussianBlur;
  import javafx.scene.layout.StackPane;
  import javafx.scene.layout.VBox;
  import javafx.scene.paint.Color;
  import javafx.scene.shape.Circle;
  import javafx.scene.shape.Rectangle;
  import javafx.scene.text.Font;
  import javafx.stage.Stage;
  import javafx.util.Duration;
  
  public class AnimatedBackground extends Application
  {
      // #########################################################################################################
      //                                                                                                      MAIN
      // #########################################################################################################
     
      public static void main(String[] args)
      {
          Application.launch(args);
      }
  
      // #########################################################################################################
      //                                                                                                INSTANCES
      // #########################################################################################################
     
      private Group root;
      private Group grp_hexagons;
      private Rectangle rect_background;
      private Scene cenario;
     
      // UI
     
      private VBox lay_box_controls;
     
      private Label lab_test;
      private TextArea texA_test;
      private Button but_test;
     
      // #########################################################################################################
      //                                                                                                 FX INIT
      // #########################################################################################################
     
      @Override public void start(Stage stage) throws Exception
      {
          this.confFX();
         
          cenario = new Scene(this.root , 640 , 480);
         
          this.rect_background.widthProperty().bind(this.cenario.widthProperty());
          this.rect_background.heightProperty().bind(this.cenario.heightProperty());
  
          stage.setScene(cenario);
          stage.setTitle("Meu programa JavaFX - R.D.S.");
          stage.show();
      }
     
      protected void confFX()
      {
          this.root = new Group();
          this.grp_hexagons = new Group();
         
          // Initiate the circles and all animation asynchronously.
          for(int cont = 0 ; cont < 15 ; cont++)
          {
              Circle circle = new Circle();
              circle.setFill(Color.WHITE);
              circle.setEffect(new GaussianBlur(Math.random() * 8 + 2));
              circle.setOpacity(Math.random());
              circle.setRadius(20);
             
              this.grp_hexagons.getChildren().add(circle);
             
              double randScale = (Math.random() * 4) + 1;
             
              KeyValue kValueX = new KeyValue(circle.scaleXProperty() , randScale);
              KeyValue kValueY = new KeyValue(circle.scaleYProperty() , randScale);
              KeyFrame kFrame = new KeyFrame(Duration.millis(5000 + (Math.random() * 5000)) , kValueX , kValueY);
             
              Timeline timeL = new Timeline();
              timeL.getKeyFrames().add(kFrame);
              timeL.setAutoReverse(true);
              timeL.setCycleCount(Animation.INDEFINITE);
              timeL.play();
          }
  
          this.rect_background = new Rectangle();
  
          this.root.getChildren().add(this.rect_background);
          this.root.getChildren().add(this.grp_hexagons);
         
          // UI
         
          this.lay_box_controls = new VBox();
          this.lay_box_controls.setSpacing(20);
          this.lay_box_controls.setAlignment(Pos.CENTER);
         
          this.but_test = new Button("CHANGE POSITIONS");
          this.but_test.setAlignment(Pos.CENTER);
         
  // Change circles position when button is pressed.
          this.but_test.setOnAction(new EventHandler<ActionEvent>()
          {
              @Override public void handle(ActionEvent e)
              {
                  for(Node hexagon : grp_hexagons.getChildren())
                  {
                      hexagon.setTranslateX(Math.random() * cenario.getWidth());
                      hexagon.setTranslateY(Math.random() * cenario.getHeight());
                  }
              }
          });
         
          this.texA_test = new TextArea();
          this.texA_test.setText("This is just a test.");
         
          this.lab_test = new Label("This is just a label.");
          this.lab_test.setTextFill(Color.WHITE);
          this.lab_test.setFont(new Font(32));
         
          this.lay_box_controls.getChildren().add(this.lab_test);
          this.lay_box_controls.getChildren().add(this.texA_test);
          this.lay_box_controls.getChildren().add(this.but_test);
         
          this.root.getChildren().add(this.lay_box_controls);
      }
  }
  
  

  
  I think that my tree of nodes is structured as follows :

  
  

  http://S27.postimg.org/pjpvnlywz/rvore_de_n_s.jpg

  
  

  I also have tried to change the root of my scene graph to StackPane. Unfortunately, the result was weird. Despite my interface controls went to the middle of the window (which is what I wanted), the bottom began to to animate in a totally weird way. I don't know what else to do on this subject. , It would be strange If this type of feature is not exist in JavaFX, because I could easily do this kind of thing to the Swing Framework library and timming. So far, I still can't understand how I could get around this problem. As a user of JavaFX, I think that it would be more interesting if the JavaFX developers would put more cool similar things to present in the documentation us. Well... If someone can help me Iwill be really grateful. I don't know a lot of people peut Can also take advantage of this too.

  
  

  Thank you for your attention and patience in any case.
  

  
  

  Editada por Mensagem: Loa

  It seems to me that I finally got the result I wanted, thanks to God and to you for this. I'd love to share with the community here:

  Using StackPane as root, it seemed to me that I was not getting the desired result. As you say, make use of the group for circles, causes odd effect I spoke. That's because you showed me in the JavaFX API, group is committed to the size of its child nodes. As in this type of animation background changes its size in transition (and because it's in a layout that centralizes things like StackPane), it seems that the circles are not calm and move every time they becoming or shrinkage. Using StackPane as one parent node to the circles, they are all mainly in the center of the Panel, as it is one of the goals of StackPane. As I intend to change their positions, I used the following code block so that it is possible (in the case where triggered when the button is clicked):

  circle.setTranslateX(Math.random() * cenario.getWidth());
  circle.setTranslateY(Math.random() * cenario.getHeight());
  

  He was supposed to distribute the circles in the background of the window. However, it was not quite what happened. This that this resulted in circles in the background OF THE CENTER OF THE BACKGROUND, not distributing from the upper left, as initially planned by me. This means that the starting position in the center of a StackPane node leaves, that is to say StackPane not only centralizes things, but also change the initial position of them. For the circles to be distributed properly, I had to take into account the negative positions, since their origin was like being in the Center. With that, I could find the following code:

  circle.setTranslateX( random.nextInt((int) cenario.getWidth()) - cenario.getWidth() / 2 );
  circle.setTranslateY( random.nextInt((int) cenario.getHeight()) - cenario.getHeight() / 2 );
  

  All this race about ended up giving me the tree of the following nodes:

  http://S14.postimg.org/y887ps3zz/finalnodes.jpg

  And also the following final code:

  import java.util.Random;
  
  import javafx.animation.Animation;
  import javafx.animation.KeyFrame;
  import javafx.animation.KeyValue;
  import javafx.animation.Timeline;
  import javafx.application.Application;
  import javafx.event.ActionEvent;
  import javafx.event.EventHandler;
  import javafx.geometry.Insets;
  import javafx.geometry.Pos;
  import javafx.scene.Node;
  import javafx.scene.Scene;
  import javafx.scene.control.Button;
  import javafx.scene.control.Label;
  import javafx.scene.control.TextArea;
  import javafx.scene.effect.GaussianBlur;
  import javafx.scene.layout.StackPane;
  import javafx.scene.layout.VBox;
  import javafx.scene.paint.Color;
  import javafx.scene.shape.Circle;
  import javafx.scene.shape.Rectangle;
  import javafx.scene.text.Font;
  import javafx.stage.Stage;
  import javafx.util.Duration;
  
  public class AnimatedBackground extends Application
  {
      // #########################################################################################################
      //                                                                                                      MAIN
      // #########################################################################################################
  
      public static void main(String[] args)
      {
          Application.launch(args);
      }
  
      // #########################################################################################################
      //                                                                                                INSTÂNCIAS
      // #########################################################################################################
  
      private StackPane root;
      private StackPane circles;
      private Rectangle rect_background;
      private Scene cenario;
  
      // UI
  
      private VBox lay_box_controls;
  
      private Label lab_test;
      private TextArea texA_test;
      private Button but_test;
  
      // #########################################################################################################
      //                                                                                                 INÍCIO FX
      // #########################################################################################################
  
      @Override public void start(Stage stage) throws Exception
      {
          this.confFX();
  
          cenario = new Scene(this.root , 640 , 480);
  
          this.rect_background.widthProperty().bind(this.cenario.widthProperty());
          this.rect_background.heightProperty().bind(this.cenario.heightProperty());
  
          stage.setScene(cenario);
          stage.setTitle("Meu programa JavaFX - R.D.S.");
          stage.show();
      }
  
      protected void confFX()
      {
          this.root = new StackPane();
  
          this.circles = new StackPane();
          this.circles.setStyle("-fx-border-color:blue");
  
          // Initiate the circles and all animation stuff.
          for(int cont = 0 ; cont < 15 ; cont++)
          {
              Circle circle = new Circle();
              circle.setFill(Color.WHITE);
              circle.setEffect(new GaussianBlur(Math.random() * 8 + 2));
              circle.setOpacity(Math.random());
              circle.setRadius(20);
  
              this.circles.getChildren().add(circle);
  
              double randScale = (Math.random() * 4) + 1;
  
              KeyValue kValueX = new KeyValue(circle.scaleXProperty() , randScale);
              KeyValue kValueY = new KeyValue(circle.scaleYProperty() , randScale);
              KeyFrame kFrame = new KeyFrame(Duration.millis(5000 + (Math.random() * 5000)) , kValueX , kValueY);
  
              Timeline timeL = new Timeline();
              timeL.getKeyFrames().add(kFrame);
              timeL.setAutoReverse(true);
              timeL.setCycleCount(Animation.INDEFINITE);
              timeL.play();
          }
  
          this.rect_background = new Rectangle();
  
          this.root.getChildren().add(this.rect_background);
          this.root.getChildren().add(this.circles);
  
          // UI
  
          this.lay_box_controls = new VBox();
          this.lay_box_controls.setSpacing(20);
          this.lay_box_controls.setAlignment(Pos.CENTER);
          this.lay_box_controls.setPadding(new Insets(0 , 90 , 0 , 90));
  
          this.but_test = new Button("CHANGE POSITIONS");
          this.but_test.setAlignment(Pos.CENTER);
  
          // Pressing the button, the circles will change to random positions.
          this.but_test.setOnAction(new EventHandler()
          {
              @Override public void handle(ActionEvent e)
              {
                  Random random = new Random();
  
                  for(Node circle : circles.getChildren())
                  {
                      // The layout behaves in a very unexpected way.
                      circle.setTranslateX( random.nextInt((int) cenario.getWidth()) - cenario.getWidth() / 2 );
                      circle.setTranslateY( random.nextInt((int) cenario.getHeight()) - cenario.getHeight() / 2 );
                  }
              }
          });
  
          this.texA_test = new TextArea();
          this.texA_test.setText("This is just a test.");
  
          this.lab_test = new Label("This is just a label.");
          this.lab_test.setTextFill(Color.WHITE);
          this.lab_test.setFont(new Font(32));
  
          this.lay_box_controls.getChildren().add(this.lab_test);
          this.lay_box_controls.getChildren().add(this.texA_test);
          this.lay_box_controls.getChildren().add(this.but_test);
  
          this.root.getChildren().add(this.lay_box_controls);
      }
  }
  

  The only little problem that 'left' now is when the user resizes the application. Once that circles are distributed whenever the application is resized they need be distributed again. My test application doesn't have with that in mind, but I think I can solve this problem easily using a layout that arranges the nodes by the edges of a panel using a proportional positioning. For example, should be a sign of provision for organizing nodes always a certain percentage of the edges. This can be done easily with a layout of the custom panel, because AnchorPane behaves in a different way.

  I think that what I have to do now is go back and learn how to create a custom layout Panel. I want to thank all of you for your patience and your good intention to help. Thank you, really!

  If anyone has anything to add, or corrections to what I said earlier, I would be very happy. The richest is this thread, best JavaFX is accepted for other users.