Put in command button Mode loses the callback function

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• How to get out of the callback function key before it complete the LabwindowsCVI

  Hi all

  In my program I use the command button (called SCAN) to analyze the setting on the serial port. When I press SCAN button callback fuction starts to send command on the series for the scan on the serial port setting. There are 99 order send and read. It takes about 3 minutes. It works very well. Now, I want to stop scanning and exit the callback function that is called by the button SCAN. Now when I press the SCAN button that it completes all 99 recommend and control then come to the interface user. So I'm not able to stop and get out of this loop. Y at - it a why to exit this loop if the user wants to get out? otherwise it will finish the scan.

  -Vishnu

  Hello

  I'll give you 3 options:

  1. If you want to go programaticly you can use simple break when stopping 'event' occur.

  2. If you want to go with a Cancel button, you can use this post:

  http://forums.NI.com/T5/LabWindows-CVI/few-general-CVI-questions-how-the-compiler-works/m-p/1440984

  where I already asked that it is not the recommended option for the panels.

  3. the best option is to use the multi threading separate each button in thread...

• leak memory with the callback function

  Hello

  I'm pretty new on LabWindows and library ninety, I worked mainly with LabVIEW.

  I am trying to create a basic c++ client (no GUI) that sets up subscriptions to several network publication of a PXI DAQ data variables.

  The data for each variable is sent in a cluster and contains different types of data with a 2D array large int16 for the acquired data (average size of array is 100 k in total, and the average time between the data being sent is 10ms). I have an average of 10 of these variables DAQ.

  I'm passing the same callback function as an argument to all of these subscriptions (CNVCreateSubcription).

  He reads all the correct data, but I have a problem is that I have a memory leak in the callback function in the CNVCreateSubscription.

  I have reduced the line of code one and found the function that actually causes the memory leak, it's a CNVGetStructFields(). At this point in the program data has not yet been adopted for the variables of the customers.

  It is a simplified version of the callback function, where I just unzip the cluster and get data (showing only a field in the cluster in the example, showing also doesn't not the decleration).

  The function is passed in the function to subscribe, as follows:

  public static void CNVCALLBACK SubscriberCallback(void * handle, CNVData data, void * callbackData);

  CNVCreateSubscriber (url.c_str (), SubscriberCallback, NULL, 0, CNVWaitForever, 0, & Subscriber);

  public static void CNVCALLBACK SubscriberCallback(void * handle, CNVData data, void * callbackData)
  {

  int16_t daqValue [100000];

  unsigned long int nDims;
  unsigned long int daqDims [2];
  CNVData fields [1];
  Type CNVDataType;
  unsigned short int numFields;

  CNVGetDataType (data, & type, &nDims);)
  CNVGetNumberOfStructFields (data, & numFields);
  CNVGetStructFields (data, fields, numFields); //<-------HERE is="" the="" problem,="" i="" can="" comment="" out="" the="" code="" after="" this="" point="" and="" it="" still="" causes="" a="" memory="">

  CNVGetDataType (fields [0], & type, &nDims);)

  CNVGetArrayDataDimensions (fields [0], nDims, acqDims);
  CNVGetArrayDataValue (fields [0], type, daqValue, daqDims [0] * daqDims [1]);

  CNVDisposeData (data);

  The average settings, I use all my memory systems (4 GB) in time.

  My question is, all else have experienced this and what might be the problem/solution to this?

  Thank you.

  I see that you disable only handle memory (data), but not the memory of the structure; Therefore, before calling CNVDispose (data) you should have something like

  While (numFields > 0)
  CNVDisposeData (fields [-numFields]);

• How can I build a dll containing that a callback function, the callback function is used in CVI.

  Hello

  Case is that LABVIEW receive external data and produce an interrupt, then sends the data to the CVI.

  Can I generate a dll containing a callback function, use the callback function in CVI. Or there is a better way?

  Thank you

  
  

• allows you to set the callback function to extension webworks

  I see in BBM webworks API, the callback function (blackberry.bbm.platform.onaccesschanged) is defined as a field variable, then call the register function.

  Is the only way to pass a callback to webworks?

  You can pass a callback function as a parameter to a function call?

  In my exercise, I tried to define an acceptable extension webwork function a ScriptableFunction as one of the parameters.  When I pass the function() {alert("test")} as an argument, the webwork expansion feature does not work. The debugger displays the webworks function is not called when I try to get to the function as an argument.

  June

  Hi June,

  A callback function right at the method as fact in good number of our API, you can actually pass. On the top of my head, take a look at the readFIle API. You can find the source of the code here - https://github.com/blackberry/WebWorks/blob/master/api/io/src/main/java/blackberry/io/file/ReadFileF...

  You should be able to move from the ScriptableFunctions back with no problems

• E2500 v2 in Bridge mode loses the ability to manage the device.

  All E2500 v1 and v2 are configured with Firmware Version: 1.0.07

  I can handle all the v1, but I can not mange to v2. What Miss me?

  Is this a known bug? Is there a work around or I would stay 4 x E2500 that I just bought?

  All are running farm ware

  Internet - Cable modem - E4200
  |
  |
  |
  Cisco switch
  |  |  |
  |  |  |
  |  | Port WAN E2500 v2 (bridge mode) 192.168.1.33/24
  |  |
  | Port WAN E2500 v1 (bridge mode) 192.168.1.32/24
  |
  Port WAN E2500 v1 (bridge mode) 192.168.1.31/24

  Hello! Try to reflash the E2500 v2 firmware if it's the only one with a problem. Please refer to this link http://kb.linksys.com/Linksys/ukp.aspx?vw=1&docid=e9c2361ee7974d75913e61386a712188_4030.xml&pid=80&r... After the reflash, do a hard reset on the router. Do it right, please press and hold the reset button for 30 seconds while the unit is turned on. Release the button and unplug the router. Reconfigure the settings after that.

• disable a command button based on the values

  Hello.
  
  I use jdev 11.1.5
  
  My scenario:
  
  I need to disable a command button if the values of the two attributes does not match
  
  More inf:
  
  I had used a command button called Confirm.
  
  This button should be disabled if the debit and credit attributes did not have the same values

  You can set the disabled property of the command button to an expression something like #{! bindings.creadit.inputValue eq bindings.debit.inputValue}.

  Make sure that you set the autoSubmit property to true text entry fields and ID them as partialTriggers for the commandButton control.

  Arun-

• Satellite P305-S8828 touchpad lose the scroll function

  My touchpad (Alps ver. 7.0.302.8) loses scrolling periodically when switching between web sites in Firefox.
  Under "mouse properties" graph no activity for the scroll activity.

  He usually highlites the chart when I touch the touchpad scroll area. I am the latest driver, but have not tried to remove & put it back, again. Anyone know if it's probably a problem of Vista (Vista Home Premium SP1) or the Alps driver problem?
  Also, sometimes I lose my pointer, as the speed settings, during his waking from sleep. Not sure about the exact conditions when it goes well.

  I saw a problem with my card wireless is not recognized after after sleep.
  To do this, I have to restart the computer & device is reinstalled.
  The problem with the touchpad is not moved for the first 2 weeks of use, but the problem of wireless adapter started the day 2 or 3.

  Oh, BTW, I also have a Logitech (ver. 4.24.28.0) installed mouse & driver Wacom (1.2.2.0) installed.
  I can do without the Wacom being installed at the beginning, but I don't want to install the Logitech mouse driver.

  Any help is appreciated.

  Thanks, kev

  Hey kev

  We can chat about it only if you use the image settings or the factory of recovery. You have installed third party driver and the responsibility of Toshiba stops there. No one knows if there is a negative influence to driver preinstalled Toshiba.

  If you want to have the full functionality of the touchpad, use Toshiba stuff only. But if you want to use an external device with own driver or software you have to live with it.

• incomplete documentation of the Callback function plans

  The third paragraph of (CVI2010) help with callback function plans says:

  The main callback function is the only type of callback function that responds to the EVENT_END_TASK. Windows only, this event occurs when the user tries to exit Windows.

  This information seems incomplete: EVENT_END_TASK also occurs if the program is closed via the taskbar button.

  Thanks, Wolfgang. We'll fix it.

  Luis

• The callback functions control array?

  My apologies for my basic question.

  I'm experimenting with control arrays and so far able to collect data in controls of a string that is contained in the tables of controls.  Works well.  Of course, none of these controls need callback functions.

  Now, I need a few momentary controls in a control array as well.  So my question is, should I use a single callback for all button controls function in this unique table?  And if so, how can I do to determine which element in the control array called the function?  Reading the forums, it seems as if the use of the data parameter of the callback could happen to me.

  I just wanted to ask before we get off the track.  Thank you!

  Yes, callbackData can be useful in such a situation, but if you can limit to switch to array index to distinguish what to do the recall of your button might be something on this line:

  int CVICALLBACK BtnAttayCallback (int panel, int control, int event,
          void *callbackData, int eventData1, int eventData2)
  {
      int    handle, index;
  
      switch (event)  {
          case EVENT_COMMIT:
              handle = GetCtrlArrayFromResourceID (panel, control);
              GetCtrlArrayIndex (handle, panel, control, &index);
              switch (index) {
                  // Your code here
              }
      }
      return 0;
  }
  

  (No CVI install here so I can't test it: check the code, but it should work reasonably)

• Debugging of the callback functions

  I'm fine with my comments?

  Ordinary (unnamed) callback functions are all listed as (for example) onClick() in ESTK functions pane. In addition, local variables in these functions are not in the data browser. So in my humble OPINION of debugging is not possible.

  So I tried the method with named callback functions that avoids these two disadvantages:

  Callbacks without a name	Named callbacks
  myDlg.btn2.onClick = function() {   $.bp(true);   aLocal = "gugus";   if (this.text == 'Disable Him') {     this.text = 'Enable Him';     myDlg.btn1.enabled = false;   } else {     this.text = 'Disable Him';     myDlg.btn1.enabled = true;   } }	myDlg.btn2.onClick = ActButton2; // ... function ActButton2 () { $.bp (true);   var aLocal = "gugus";   if (this.text == 'Disable Him') {     this.text = 'Enable Him';     myDlg.btn1.enabled = false;   } else {     this.text = 'Disable Him';     myDlg.btn1.enabled = true;   } }
  Œuvrant variable does not appear in the data browser	Variable Œuvrant is listed in the data Explorer
  The functions are named onClick in the functions pane	Functions have separate names in the functions pane
  callback functions are within the window function	callback functions (are) / (maybe) outside the window function

  Of course, the names for the named callback functions must be unique for the script.

  What version of FrameMaker do you use?

  Now, I see your problem:

  You can't do something like this:

  wPnlN.p0.b1.onClick = Button1p (whatIsThis, outerParm) ;
  

  Means: you cannot pass parameters to this function here. Otherwise, the function is executed immediately.

  wPnlN.p0.b1.onClick = Button1p; // no brackets!!!!!!
  

• Delete the command button to remove the particular line of VO

  Hello
  
  I dragged & tomb6e a VO jspx page as a table, the data control palette dragged delete operation as a button on the table as the last column.
  By pressing the button Delete, that is, remove top row of VO. I want to remove the delete button w.r.t. specific line on the list of columns...?
  
  
  Kind regards.

  Can you confirm if the property table in your bed jsff/jspx selectionListener -
  #{bindings. { . collectionModel.makeCurrent}

• How to change the callback of a GUI button function?

  I would like to change the callback function associated with a GUI button dynamically in the programming track.

  Here is the piece of code that I tried, but it doesn't seem to work:

  const char * pstrLabelSaveJpeg = "SaveJpegCb";

  SetCtrlAttribute (pahel_id, ctrl_id, ATTR_LABEL_TEXT, pstrLabelSaveJpeg);

  int CVICALLBACK SaveJpegCb(int panel, int control, int event, void *callbackData, int eventData1, int eventData2);

  The attribute that you used is the 'label' of the button.

  It is only an appearance attribute. You can write your own name on it, but this does not alter the callback function.

  You must change the ATTR_CALLBACK_FUNCTION_POINTER attribute, and you shall not take the name of the function as a string.

  If your function call will look like this:

  SetCtrlAttribute (pahel_id, ctrl_id, ATTR_CALLBACK_FUNCTION_POINTER, SaveJpegCb);

  Of course, you must declare the function SaveJpegCb somewhere above this line.

  I think you have already done this.

• How LabVIEW can press a command button in the Access form?

  Situation: access database with a command button, which generate code after you have pressed

  Task: LabVIEW open the access database, you press the command button and read the code

  Status:

  • Use activeX to open data access - ready
  • Press the control button - open
  • code - open reading

  Problem: is there a possibility that LabVIEW automatically press the button in the Access form?

  Dear Mike,
  Thanks for the reply. You are right that MS Access is not really a database. ;-)

  When the operator will push the button, the program generates a serial number and add the new number in the article table.
  Therefore, by pushing the button means process this code.

  Solution
  After that I became the password to unlock the database, I have check the code behind the button and build it with LabVIEW.

  So it is not necessary to press the button :-)

• Conditionally disable the command button

  I have a table with tableSelectOne and I want to disable a command button outside of the table based on the selected line. Here is what my code looks like:
  
  < af:table >
  < f: facet = 'selection' name >
  < af:tableSelectOne autoSubmit = "true" / >
  < / f: facet >
  < af:column >
  < af:column >
  < / af:table >
  
  < disabled af:commandbutton = "{#someCondition}" / >
  
  
  The code above does not work. No idea why?
  
  Thank you very much!

  Hello

  Did you remove the ID of the components manually? A suggestion of Shay working, you must have an ID for the button and table elements. Something like

  Arun-