SubVI window closure

Hi!
I built a subVI for an Oscilloscope VI that performs signal analysis.
Users should be able to open and close the subVI's window, but I cannot make it work as I wish.
What it should do is:
- open the subVI when an on-off control is clicked and start calculations
- close the subVI's window and stop calculations
- redo this passages every time the user needs it
What I builts does:
- open the subVI with the button and start calculations properly
- when I close the SUBVI window it opens again whith calculations stopped
- after re-closing, if I open the subVI with the button it does not calcuates
- after re-cliking the button it finally starts working again
I have attached the subVI and an example VI reproducing the loop containing the subVI.
Do you know a better (and more correct) way to make it work?
Thanks!
Mike
MikeNuke, PhD student
Politecnico di Milano
Department of Energy, Nuclear Engineering Division
Solved!
Go to Solution.
Attachments:
ExampleOscilloscope.vi ‏29 KB
OscMeas.vi ‏257 KB

I just noticed a nasty race condition you have as well. If you toggle the button after the terminal was read but before the local variable is written to, your button toggle could be ignored due to the local overwritting your user.
What I would do with this setup would be to launch the subVI as a parallel process. The VI can maintain its own state and what not. You could then use User Events and/or Queues to send your data to the other process.
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var req_2:URLRequest = new URLRequest("audio/Safety.mp3");
var req_3:URLRequest = new URLRequest("audio/Compartments.mp3");
var req_4:URLRequest = new URLRequest("audio/Dual.mp3");
var req_5:URLRequest = new URLRequest("audio/Switch.mp3");
var req_6:URLRequest = new URLRequest("audio/Installation.mp3");*/
//channel.addEventListener(Event.SOUND_COMPLETE,soundCompleteF);
function soundCompleteF(e:Event):void{
currentSound = null;
SoundMixer.stopAll();
introductionButton.addEventListener(MouseEvent.CLICK, fl_ClickToLoadUnloadSWF_5);
function fl_ClickToLoadUnloadSWF_5(event:MouseEvent):void
SoundMixer.stopAll();
fl_Loader.load(new URLRequest("captivate/Introduction.swf"));
snd_1.load(new URLRequest("audio/Introduction.mp3"));
//channel = snd_1.play();
//currentSound = snd_1;
//snd_2.close();
//snd_3.close();
//snd_4.close();
//snd_5.close();
//snd_6.close();
if(channel.hasEventListener(Event.SOUND_COMPLETE)){
channel.removeEventListener(Event.SOUND_COMPLETE,soundCompleteF);
channel=null;
channel = snd_1.play();
//snd_1.play();
channel.addEventListener(Event.SOUND_COMPLETE,soundCompleteF);
    currentSound = snd_1;
    snd_2.close();
    snd_3.close();
    snd_4.close();
    snd_5.close();
    snd_6.close();
    introductionButton.removeEventListener(MouseEvent.CLICK, fl_ClickToLoadUnloadSWF_5);
safetyButton.addEventListener(MouseEvent.CLICK, fl_ClickToLoadUnloadSWF_6);
function fl_ClickToLoadUnloadSWF_6(event:MouseEvent):void
SoundMixer.stopAll();
fl_Loader.load(new URLRequest("captivate/Safety Considerations.swf"));
snd_2.load(new URLRequest("audio/Safety.mp3"));
    channel = snd_2.play();
    currentSound = snd_2;
   if(channel.hasEventListener(Event.SOUND_COMPLETE)){
channel.removeEventListener(Event.SOUND_COMPLETE,soundCompleteF);
channel=null;
channel = snd_2.play();
channel.addEventListener(Event.SOUND_COMPLETE,soundCompleteF);
    currentSound = snd_2;
    snd_1.close();
    snd_3.close();
    snd_4.close();
    snd_5.close();
    snd_6.close();
compartmentsButton.addEventListener(MouseEvent.CLICK, fl_ClickToLoadUnloadSWF_7);
function fl_ClickToLoadUnloadSWF_7(event:MouseEvent):void
SoundMixer.stopAll();
fl_Loader.load(new URLRequest("captivate/Compartments.swf"));
snd_3.load(new URLRequest("audio/Compartments.mp3"));
    channel = snd_3.play();
    currentSound = snd_3;
   if(channel.hasEventListener(Event.SOUND_COMPLETE)){
channel.removeEventListener(Event.SOUND_COMPLETE,soundCompleteF);
channel=null;
channel = snd_3.play();
channel.addEventListener(Event.SOUND_COMPLETE,soundCompleteF);
    currentSound = snd_3;
    snd_1.close();
    snd_2.close();
    snd_4.close();
    snd_5.close();
    snd_6.close();
dualButton.addEventListener(MouseEvent.CLICK, fl_ClickToLoadUnloadSWF_8);
function fl_ClickToLoadUnloadSWF_8(event:MouseEvent):void
SoundMixer.stopAll();
fl_Loader.load(new URLRequest("captivate/Dual Control Mechanism.swf"));
snd_4.load(new URLRequest("audio/Dual.mp3"));
    channel = snd_4.play();
    currentSound = snd_4;
   if(channel.hasEventListener(Event.SOUND_COMPLETE)){
channel.removeEventListener(Event.SOUND_COMPLETE,soundCompleteF);
channel=null;
channel = snd_4.play();
channel.addEventListener(Event.SOUND_COMPLETE,soundCompleteF);
    currentSound = snd_4;
    snd_1.close();
    snd_2.close();
    snd_3.close();
    snd_5.close();
    snd_6.close();
switchButton.addEventListener(MouseEvent.CLICK, fl_ClickToLoadUnloadSWF_9);
function fl_ClickToLoadUnloadSWF_9(event:MouseEvent):void
SoundMixer.stopAll();
fl_Loader.load(new URLRequest("captivate/Switch Machine Operation.swf"));
snd_5.load(new URLRequest("audio/Switch.mp3"));
    channel = snd_5.play();
    currentSound = snd_5;
   if(channel.hasEventListener(Event.SOUND_COMPLETE)){
channel.removeEventListener(Event.SOUND_COMPLETE,soundCompleteF);
channel=null;
channel = snd_5.play();
channel.addEventListener(Event.SOUND_COMPLETE,soundCompleteF);
    currentSound = snd_5;
    snd_1.close();
    snd_2.close();
    snd_3.close();
    snd_4.close();
    snd_6.close();
installButton.addEventListener(MouseEvent.CLICK, fl_ClickToLoadUnloadSWF_10);
function fl_ClickToLoadUnloadSWF_10(event:MouseEvent):void
SoundMixer.stopAll();
fl_Loader.load(new URLRequest("captivate/Installation and Adjustments.swf"));
snd_6.load(new URLRequest("audio/Installation.mp3"));
    channel = snd_6.play();
    currentSound = snd_6;
   if(channel.hasEventListener(Event.SOUND_COMPLETE)){
channel.removeEventListener(Event.SOUND_COMPLETE,soundCompleteF);
channel=null;
channel = snd_6.play();
channel.addEventListener(Event.SOUND_COMPLETE,soundCompleteF);
    currentSound = snd_6;
    snd_1.close();
    snd_2.close();
    snd_3.close();
    snd_4.close();
    snd_5.close();
// This is a more "safe than sorry" setting, since multiple domains
// have entry into my site. Can be removed or hardcoded if you feel
// secure or insecure, as you see fit.
flash.system.Security.allowDomain("*");
// Throw any errors around to make sure somebody actually gets them.
ExternalInterface.marshallExceptions = true;
// This is not the most ideal way to toggle animations on and off, but
// it's thorough, generic, and simple. Iterate all movieclips within
// clip, shutting them down each in turn. A better, but much more tedious
// method would be to target specific clips using dotpath notation, telling
// each in turn to turn off or on depending on what we need.
// BUT this is just a demo, and what we're really interested in is the
// event-handling mechanism that actually calls this routine, and not the
// routine itself.
var originalFrameRate:uint = stage.frameRate;
var standbyFrameRate:uint = 0;
var pausePosition:int;
function toggleSound(b:Boolean):void{
if(b){
channel = currentSound.play(pausePosition);
pausePosition = 0;
} else {
pausePosition = channel.position;
channel.stop();
function toggleAllClips(doAnim, mainMC) {
if (parent is MovieClip){
if (doAnim) {
parent.stage.frameRate = originalFrameRate;
channel = currentSound.play(pausePosition);
pausePosition = 0;
currentSound = null;
} else {
pausePosition = channel.position;
channel.stop();
//SoundMixer.stopAll();
//currentSound = null;
parent.stage.frameRate = standbyFrameRate;
for (var i = 0; i<MovieClip.(parent.parent.parent.mainMC).numChildren; i++) {
   toggleAllClips(doAnim, parent.getChildAt(i));
   //toggleSound(true);
/*function toggleSoundPause(currentSound, mainMC) {
if(currentSound){
if(pausePosition == 0){
currentSound.play(pausePosition);
pausePosition = 0;
} else {
pausePosition = channel.position;
channel.stop();
function animOn(e:*=null) {
toggleAllClips(true, parent.getChildByName("mainMC"));
toggleSound(true);
function animOff(e:*=null) {
toggleAllClips(false, parent.getChildByName("mainMC"));
toggleSound(false);
function injectPrep(e:*=null) {
try {
ExternalInterface.addCallback("jsanimOn", animOn);
ExternalInterface.addCallback("jsanimOff", animOff);
} catch (e) {
trace(e);
function injectListeners(e:*=null) {
try {
// Object/Embed ID of this movie needs to be inserted into the
// JavaScript before we actually wrap and send it to the browser:
var jsfix=js.toString().replace(/xxx/g, ExternalInterface.objectID);
ExternalInterface.call(jsfix);
} catch (e) {
trace(e);
// Using timeouts ensures the movie is actually done loading before
// these fire, helping compatibility for a few browser versions.
setTimeout(injectPrep,0);
setTimeout(injectListeners,100);
JAVASCRIPTS
JavaScript needs to be wrapped in a tag, a cdata, and a closure
function in order to be wrapped up and sent to the browser.
Note that an ActionScript function will replace all instances
of "xxx" with the actual ID used for this SWF.
We're battling some major bugs and crossbrowser idiosyncrasies
here:
1) In Internet Explorer the 'onblur' event is implemented
    incorrectly (as opposed to Firefox/Mozilla browsers). It is
    wrongly fired when focus is switched between HTML elements
    *inside* a window. As a result, we have to use onfocusout
    instead of onblur, and keep track of which element is active.
    If we focusout and the active element is not the previous
    active element, then we haven't actually "blurred" and dont
    want to trigger Flash.
2) Firefox has problems interpreting both getElementById and
    document["swf"] when dealing with "twicebaked" object/embeds.
    Adobe's method of finding the swf fails to address the fact
    that document["swf"] sometimes returns an array in this
    situation rather than an object ref, and getElementById
    sometimes confuses name and id.
3) When a window is created in Firefox, it doesn't actually have
    "focus" (event though it appears to) and therefore won't "blur"
    unless you actually click in it first, i.e if you open up a
    window, then immediately send it to the background, it never
    gets the command to halt the flash. So we have to explicitly
    focus the blasted thing to get it to work properly.
4) Because of irregularities caused by Ajax, the way browsers shut
    down, and other factors, there's a good chance our swf won't
    be there when a blur (or focusout) event occurs. Therefore we
    need an explicit check within the event handler itself.
5) Finally, we want to wrap everything inside a wrapper-closure
    function, to keep everything safe from being stepped on. Lucky
    us, we have to do this anyways to get everything to fit inside
    a single ExternalInterface.call event.
var js:XML = <script><![CDATA[
( function() {
var active_element; // tracker for ie fix;
var bIsMSIE = false;
// Modified version of Adobe's code resolves a bug in FF:
function getSWF(movieName) {
    if (navigator.appName.indexOf("Microsoft") != -1) {
      return window[movieName];
    } else {
      // Resolves a bug in FF where an array is sometimes returned instead of a
      // single object when using a nested Object/Embed.
      if(document[movieName].length != undefined){
        return document[movieName][1];
      return document[movieName];
// Need to check for swf each time we try this because the swf may actually be gone
// because of ajax or a window closure event. Prevents error dialog from popping up.
// Future release should check for this condition and then remove the calling event
// so it doesn't keep triggering.
function animOff(){
    if (bIsMSIE && (active_element != document.activeElement)) {
      active_element = document.activeElement;
    } else {
      var logoThang = getSWF("xxx");
      if(logoThang){logoThang.jsanimOff();}
function animOn(){
    if (bIsMSIE && (active_element != document.activeElement)) {
      active_element = document.activeElement;
    } else {
      var logoThang = getSWF("xxx");
      if(logoThang){logoThang.jsanimOn();}
// Add the listeners. Hear ye, here ye.
if (typeof window.addEventListener !== "undefined") {
    // Firefox, Mozilla, et al.
    window.addEventListener("blur", animOff, false);
    window.addEventListener("focus", animOn, false);
} else if (typeof window.attachEvent !== "undefined") {
    // Internet Explorer
    bIsMSIE = true;
    window.attachEvent("onfocus", animOn);
// Another bug: window.onblur ALWAYS fires in IE, so
// we have to keep track of what we're clicking using
// another method:
active_element = document.activeElement;
document.attachEvent("onfocusout", animOff);
// Necessary to trigger toggling in FF if the page hasn't actually been clicked in and the page
// is sent to the background. Can be commented out if necessary, e.g. if you don't want the page
// popping to the top or want focus to remain somewhere else like a form field.
// window.focus();
]]></script>;
Thanks you SOOO MUCH for your help. There is no way I could have done this alone and now I have a better understanding about referencing vars.
Thanks,
Elena

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