Prevent the structure elements of the queue of the event?

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• Prevent the event of action af:fileDownloadActionListener

  # Background
  
  The following problem is also described in the: http://stackoverflow.com/questions/14638103/prevent-affiledownloadactionlistener-action-event
  
  Using JDeveloper 11.1.2.3 to create a report download button using 'fileDownloadActionListener' as follows:

      <af:commandButton text="Run Report" id="submitReport">
        <af:fileDownloadActionListener method="#{reportBean.run}"/>
      </af:commandButton>

  At the top of the JSF page is the following:
  

      <f:view afterPhase="#{validationBean.afterPhase}" ...>
        ...
          <af:form id="f1">
            <f:event listener="#{validationBean.postValidate}" type="postValidate"/>

  The idea is that the bean Validation allows you to capture validation issues as follows:
  

      public void afterPhase(javax.faces.event.PhaseEvent phaseEvent) {
        if (phaseEvent.getPhaseId() == PhaseId.RENDER_RESPONSE) {
          FacesContext context = phaseEvent.getFacesContext();
          FacesMessage.Severity severity = context.getMaximumSeverity();
      
          if (isSevereError(severity)) {
            context.getExternalContext().getSessionMap().put(ERROR_FLAG_NAME, true);
          }
        }
      }

  This works as expected. When the user presses the button, but the form has an error, the session variable "validationError" is set to 'true '. This should allow the frame avoid the generated report if the form parameters have errors.
  
  # Problem
  
  The session variable "validationError" is used by the run method of the bean the report as follows:
  

        public void run(FacesContext facesContext, OutputStream outputStream) {
          Object error = facesContext.getExternalContext().getSessionMap().get( ERROR_FLAG_NAME );
          
          if( error != null && error != Boolean.TRUE ) {
            Report report = null;
      
            try {
              report = getReport();
              report.setOutputStream(outputStream);
              configure(report.getParameters());
              report.run();
            } catch (Exception e) {
              if (report != null && facesContext != null) {
                report.publish(e);
              }
            }
          }
          else {
            facesContext.getExternalContext().getSessionMap().remove( ERROR_FLAG_NAME );
            facesContext.renderResponse();
          }
        }

  When there is a validation on the page, the "facesContext.renderResponse ()" error; the code is executed, but the resulting web page is empty. Any exceptions are documented. No errors are generated.
  
  # Question
  
  One way to avoid this situation uses a button hidden, customized Java and JavaScript, as described in the following pages:
  
  -http://jobinesh.blogspot.ca/2010/01/customizing-execution-of-to-validate.html
  -http://tompeez.wordpress.com/2011/07/14/validate-data-before-export-via-afexportcollectionactionlistener-or-affiledownloadactionlistener/
  
  However, this mechanism is complicated. The solution I have in mind will work if the page can be rendered as usual.
  
  How do force you the page to render once triggered by the event "af:fileDownloadActionListener"?
  
  Thank you!

  Dave,

  using a hidden button is the only option you have available today. I will drop an ER that fires an event to the listener fileDownload (kind of prior download) should allow you to cancel it by calling make response. As said, this does not yet exist and the hidden button is the option you have available (note that the download file tag is a tag of customer behavior and not a user interface component full, it is why there is no way yet to interrupt execution.

  Frank

• Structure of the event in primary vi and sub - VI with queues

  Hi all

  I have an application that uses the architecture of producer-consumer in which a queue transmits messages of a main VI by a Subvi, in response to the events of the user in the front panel. Inside the Sub VI, the queue is removed and treaty based on the corresponding message, and the result is displayed on the façade the sub of VI. User events are captured in the main VI using a Structure of the event. This works as expected.

  However, I also the controls on the Panel before the sub - VI to change the queue. My approach is to have another structure of the event in the VI sub for this. However, while the events in the main work of fine VI, events of sub - VI never treated.

  A simplified sandbox VI of what I'm trying to do is attached. As you can see, the main VI events are triggered as expected, but events in the sub VI are never triggered.

  I watched this white paper: detect an event in a Subvi from a high level VI , but it's not exactly what I'm trying to do. Instead, I'm just trying to detect an event generated within the Subvi. I searched this forum and found some research related, but none of them seemed to answer what I'm trying to do.

  Thank you

  Matt

  Your major issue here is the loop location.  While the structure should be inside the Subvi to make a message in the appropriate queue manager.  In fact, you should have 2 loops within your Subvi: 1) the QMH and (2) of the event loop.  You must use a user event to congratulate the event loop in the Subvi to stop.  You should NOT use the time-out of the Structure of the event unless you absolutely must.  And since everything in the Subvi is the message function, you do not have expectations.  They will be inactive (no CPU using) when there are no items to process from the queue or queue.

• Whenever I try to print the convenience store said "a print job in the print queue prevents the other printing of print."

  Problem printing whats wrong with my laptop / printer?

  Whenever I try to print the convenience store said "a print job in the print queue prevents the other printing of print."  But there is no any other print jobs than that I try to print?

  TinaRandle,

  Try to run delete print jobs to remove all print jobs stuck in the queue.

  Don't forget to restart your computer.

  Rick

• Structure of the event does not clear the queue after his release from the Subvi

  OK I'm not sure if this is a stupid question or not...

  I was trying just a few tips and stumbeled on this problem...

  So I created a sample (not exactly)

  In qqq_Main.vi just press PressMe

  (it opens a Subvi qqq.vi)

  There are two buttons to stop "Alt1" and "pylone2".

  To close the Sub - VI press either on "pylone2".

  or press "Alt1", then "pylone2".

  with the latter method of the value of closing change pylone2 is registered outside the while loop and after the closure of the Subvi should not it be erased? (Or should manually clear us it?)

  For this reason not clear, the second time I press 'PressMe' change the value of pylone2 even goes off before you press anything

  I can't look at your code at the moment, but according to your description, it seems that the system works as expected. I guess you do a completely static record of events (open the event configuration dialog box and select the controls and event).

  The first thing to clarify is your use of the term "registered". In this case, it's a problem, because the registration in the context of the protests means asking to receive the event when it happens.

  Now that you know it's important to understand where the recording is happening, because that's what determines which events are stored in the queue. When you use this type of static record, registration happens from the VI the event structure is in run mode (Note: this does not mean that the VI is actually running, but just that it's the of running or reserved for the race) and the cancellation of registration only happens when the VI mode of execution. Who is right for which you get the events in the queue of the previous run of the VI - the VI is still in run mode, then the event is added to the queue and still waiting in the queue until the structure of the event to run again.

  You can work around something like that by switching to dynamic registration of events, where you can unsubscribe to empty the queue at the end of the VI, but requires more code. Also, in 2013 LV there are a few features added to events that could allow to do this statically (I don't study all the additions, so I don't know if this is possible for static recording).

  There is a good presentation on the events of NIWeek 2013 by Jack Dunaway. You can find details of how to download the video here - http://lavag.org/topic/16091-ni-week-2012-videos/

• A print job in the print queue prevents the other printing printing-officejet 6500 a

  whenever I click on print I get the message print job in the print queue prevents the other printing - print

  then my printer goes offline

  I tried to re add the printer

  I tried to remove and re loading software

  I tried closing down and the fact unplugging pc and printer

  I tried the system restore

  I tried the hp scan print doc - did not help

  I tried to reset the spooler

  I tried deleating all print jobs

  I tried letting windows find my printer - it doesnot find him

  Help

  Hi katt6,

  I read your message which indicates that you receive a message "is a print job in the print queue prevents other printing of print." Please provide the detailed steps that you have already tried. I can help you.

  Try and print a self-test on the printer hardware to see if it is a hardware or software problem.

  Printing a Network Setup Page.

  Run the difficulty it Microsoft tool to see if this will help.

  Diagnose and automatically fix problems printing and printer.

  If the problem persists, continue with the steps below:

  I have provided a document of empty folder of spooling print to see if she will help solve this problem.

  How to clear the current queue in Windows Vista & Windows 7.

  Try to print again.

  Printer is on a network as follows:

  If you still have problems, and that the printer is on the network, check the Configuration Page to see if you have a valid IP address.

  If you have a valid IP address for the printer, then try and access the Web built-in to the printer server.
  Type the IP address in the address bar of your web browser. (Internet Explorer)

  Check the IP address on the computer to verify that it matches the IP address of the printer.
  Go to start, devices and printers, right click on the printer, go to the properties of the printer, some ports tab, click on configure port.
  If they don't match then close the Configure Port window and click on create a port and follow the instructions in the wizard.

• a print job in the print queue prevents the other printing printing, canon ip1600

  the print queue status always show print error ~ ~

  trobleshoot shows a print job in the print queue prevents the other printing of print ~ ~
  I use the canon iP1600 and compaq presario CQ42 ~ ~
  Windows 7 ultimate ~.
  
  Thank you very muchhhh ~ ~

  Go to control panel, printers and hardware then printers, identify the printer, right click, the menu it takes an option to see what printing?, left click that and then cancel all print jobs, this shouldnfix this problem

  Kind regards

  Nathan

• a print job in the print queue prevents the other print jobs, printing hp 3050 j610 series

  Hello

  I have a windows 7 PC with Wi - Fi connection and one for the printer HP 3050 J610 series. I get an error since the fix it doctor that a print job in the print queue prevents the other printing of print. I looked on the internet where I see several comments that say I must go into the command prompt but I don't know what to ask for 'my' specific printer and a PC. Can anyone help? Thank you

  Hello

  Good to know that your problem is solved. Please do not hesitate to answer, in the case where you are facing in the future other problems with Windows.

• How to import in the video editor of first elements 13 clips with the tag structure or the person, location and the structure of the event organizer?

  How to import in the video editor of first elements 13 clips with the tag structure or the person, location and the structure of the event organizer?

  senior50

  On what computer operating system is your first items 13 running? And you have updated 13 to 13.1 still using Help Menu/implementation of an open project? If this isn't the case, please consider this.

  Now to your question immediately.

  I would consider placing your files for organizing items (person, place or event) in albums that you create in the organizer of items for each. Then,

  (a) the content of the album of the opening of the first elements add multimedia/Organizer.

  or

  (b) by selecting your album in the elements Organizer, select the photos in the album you want, then right click anywhere in a selection and Edit with Premiere elements editor selection?

  Have you been there and done that yet?

  Please examine, consider, give more details, and we can then decide what.

  Thank you.

  RTA

• Iteration in a structure of the event on the subset of elements of control

  I have an array of boxes that I want to live inputs switch indicators.  I have two tables which cell values feed indicators.  The checkboxes indicate which table is routed.

  My options are:

  1. Make a giant list of nodes of property with the switches (30 + switch, subset, property of update)
  2. make a loop that repeats against a ring (or cluster), where the iteratable enumerates objects to watch ring + loop + 1Passez pressing sur-sous-ensemble-update

  The second options seems so much more elegant than the first.

  I think that the references will need to be more channels.  I can make chains in a cluster and iterate on the cluster.  I don't know if I can do a mass of object references.

  Issues related to the:

  • How a list of references to the inidcators that a loop is ready to go and change the values?
  • Is there any value (for the rest of the system) for me to set a delay time delay in the events of the while loop + structure?  Is it CPU free for other things if he timed it delays for the control of the event?

  Artem.SPb wrote:

  What is the Ref out of problem in table?

  

  In the case of all Boolean controls as you, it is fine.  You will have an array of Boolean references.

  If you had some Boolean references, some numerical values, strings, and built a table of these references, the table will be an array of more generic references.  So when you use the properties on them, they will simply say "control".  You will be able to work on properties that all of these controls have in common (e.g. activate or visible), but you wanted to do something more specific, such as the display of a digital format, you will need to know that your ctrlref is to a digital, then casting that make reference to a class more specific to a digital for more specific class properties.

  If it is to group references in a cluster, each item in this group will always be most specific type.

• How to prevent the creation of 15000 files for 300 MB each day Firefox

  Firefox creates files of 'file' in C:\Users\LeRicain\AppData\Local\Mozilla\Firefox\Profiles\dnm04rk5.default\cache2
  There are about 10,000 and 20,000 files I have to remove to get about 300 MB of space each day

  How to prevent the creation of these files in Firefox

  Here are the files from cache. Basically, it takes Web sites that access you a lot and records bits of them so they'll load faster the next time you visit them. FOR EXAMPLE if you visit Google.com much, Firefox will save some elements of this page in the cache so that the next time visit you Google.com, it will not have to re - download.

• using the structure of the event in the LabVIEW classes

  Hello

  I'm new in the use of LabVIEW classes, so don't know much how I can use them.

  In my main program, I have clusters with five elements in each. The elements are controls two States and in some groups, there are three States controls. The user will press the buttons (controls), and different things will happen. In my first program were I not using classes, I had a structure of the event and the controls were cases of event in the structure.

  Is it possible to somehow use an event of cases in one of the methods that is created in the classes, so that say, that's not in the main program?

  I have attached two photos: I wanted to have a structure of the event in servoTouchEvent (in left.tri.lvclass) who is a child.

  Let me know if my explanation is not clear.

  Grateful for the help!

  Hello

  Yes, you can have a structure of the event in a Subvi rather in your main VI of top-level UI. The trick is to use the 'Save for events' and passing in references to orders that you want to have the event trigger structure for. The refnum output since the function is entered in the terminal of dynamic event of the structure of the event who could live in a Subvi. You can add instances of event where you will see these control events as dynamic events then you can do something with. These excerpts from shows all the code in a simple diagram, but the stuff in the structure of disable diagram could easily transformed into a Subvi:

   

  All this can be done without classes. What will buy classes you include the ability to encapsulate your screws and also perform different code based on what object on the hierarchy of the parent-child classes is on a wire. If the behavior of your code is different between 2-3 State and controls (which I do not know what state controls 3 you are referring), you can take advantage of the classes.

• How to create a Structure of the event, repeating a task until a push a buttom

  Hello!

  I want to make a program that repeats a task until a push a buttom (indicating to begin another task). I know how to do this with a structure of the case, but I want to know how to deal with the event. Any idea?

  OK, I'm going to help you a bit.

  

  Here's how it works: the upper part (producer loop) will pass the value of the OK button (switch released) to the Message Handling loop (consumer).  When the button is true the consumer runs the code in the case of the real and enqueus another loyal to himself and then wait 1 second.  When the OK button is False, the value false is appeared on the front of the queue and the message handler runs if false, empty the rest of the queue and waits for the next message the event loop.

  The Stop button (by releasing Latch) exits the event and the queue is destroyed causing the Dequeue return an error and leaves the message loop.

  This is obviously an extremely simplified QMH.  To read up more about concepts go to file > Create Project > and click on the "More information" link

  

• Front panel locked, but not due to the structure of the event

  Hi it LV community.

  I did a staemachine program that executes an oscilloscope (screenshot of a provided below... the State of the problem). I ran my program yesterday and it worked very well. Then, like a model, a dialog box opens and I just clicked on it in a hurry. now my front hangs as soon as I move the above-mentioned State "the Oscilloscope settings.

  As indicated, I have go a repeat loop that collects successive impulses of my oscilloscope and displays on the front panel (it works fine). In parallel, I have a structure of the event that makes the tail for the real-time feedback of changes to parameters that I placed on the façade (exodus of state change).

  Here's the problem: as soon as I State 'Oscilloscope Settings' using a Boolean button on the front panel for get me there, the front hangs... No event triggered by this point, and even if it did, I already deselected the "Lock panel until the end of the matter for this event" checkbox in the case where the structure menu.

  So WHY is my front lock now? Thoughts anyone?

  Read the detailed help for event structures.

  He urged that a single event structure serve in a VI. There are moments where more can be used effectively, but caution and a thorough understanding of the structure are needed.

  The problem is that you have several structures of the event in the various cases of the state machine and they are set to respond to the same events.

  When the button Set Oscilloscope, the structures of the event in the purchase Menu and home screen States receive the event. The two lock the screen, but only one of these cases may work. It can transfer control to the State of the Oscilloscope settings, but the other event responding to this same event structure maintains the locked Panel.

  The solution is not not to release any of the event. The default value is usually the best setting. The best solution is to spend on an architecture of producer/consumer (events). Who uses two parallel loops. The producer has the one and the only structure of the event and passes orders to consumer loop through a queue.

  Probalby want as the mechanical action on the buttons to lock when you press. Put kiosks inside the respective case of event changed value and local variables becomes unnecessary.

  Lynn

• down arrow key in the structure of the event

  Hello

  I use arrows on my keyboard to control program (UP DOWN LEFT RIGHT)

  Using the button down in the structure of the event, I know what key

  But I need to detect that 2 buttons are pressed at the same time make different case for this. I don't know haw to handle this.

  Any suggestions appreciated

  Keep a table of four Boolean values in a shift register, then turn on each element or off function on a key or key release events. The number of values Boolean true will show you the State of all buttons at any time.