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Halting a running script

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    #1

    Halting a running script

    Hello,

    We have created a script that performs a pretty long operation.
    So far we managed to get a prompt when the script Starts to Either proceed or Stop. This prompt disappears when we hit the Yes or No button

    However we need a way to be able to stop a script once it is running, either by a cancel dialog that stays open while the script runs, or a key combination.

    In my researches I found the following in the Alpha Five Documentation:

    Halting Scripts

    The View > Settings... > Preferences > Running Scripts setting allows you to set the Enable 'Halt Script' dialog. This setting will interrupt a long running script to ask you if you wish to stop it.
    I believe this does what we need, but I have not been able to find this setting in

    view > Settings > Preferences

    Does it still exist in alpha Five v9 ?

    Is there another method of doing this ?

    I'm pretty sure i'm overlooking something simple, but I cant point it out.

    Thanks for any input/advice
    Tags: None
    #2
    Re: Halting a running script

    Originally posted by gauvain65 View Post
    Hello,

    We have created a script that performs a pretty long operation.
    So far we managed to get a prompt when the script Starts to Either proceed or Stop. This prompt disappears when we hit the Yes or No button

    However we need a way to be able to stop a script once it is running, either by a cancel dialog that stays open while the script runs, or a key combination.

    In my researches I found the following in the Alpha Five Documentation:



    I believe this does what we need, but I have not been able to find this setting in

    view > Settings > Preferences

    Does it still exist in alpha Five v9 ?

    Is there another method of doing this ?

    I'm pretty sure i'm overlooking something simple, but I cant point it out.

    Thanks for any input/advice
    That Halt is just for debugging purposes and should not be used operationally.

    The proper way to do this is to start a modeless XDialog box with a cancel button. The Xdialog box would either run the code, or send a flag (message) to the code to halt at the next point where the flag is checked.

    This will be able to stop any XBasic code looping, but will not be able to stop an operation like Append, as that is all within Alpha's internal code. If the latter is the case, you might be able to shut down the session of the operation, but that is not a trivial solution.
    Regards,

    Ira J. Perlow
    Computer Systems Design


    CSDA A5 Products
    New - Free CSDA DiagInfo - v1.39, 30 Apr 2013
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    Comment

      #3
      Re: Halting a running script

      Thank you for the quick answer.

      We will experiment with the cancel button then.
      As you said, just killing the session is far from being a clean solution :)

      Comment

        #4
        Re: Halting a running script

        Sorry I hit the submit button a bit fast here.

        You mentionned displaying a modeless Dialog box.

        I believe We do use this at the beginning of our script, but as soon as we hit OK it disappears.

        Code:
        ui_msg_box ()
        Does that mean we have no way of cancelling a started operation?

        In short here is what our script does:

        It reads through a series of tables, evaluates conditions and then writes the result in an output table.

        Comment

          #5
          Re: Halting a running script

          UI_MSG_BOX(), and many others built in UI functions are modal, meaning they pause the code until you exit the dialog.

          Look up in the Alpha Five help XDIALOG and MODELESS. Also review the sample database, Learning XDialog. There are many examples that should be of help.
          Regards,

          Ira J. Perlow
          Computer Systems Design


          CSDA A5 Products
          New - Free CSDA DiagInfo - v1.39, 30 Apr 2013
          CSDA Barcode Functions
          CSDA Code Utility
          CSDA Screen Capture

          Comment

            #6
            Re: Halting a running script

            Thank you for pointing us in the right direction.
            I'll follow your suggestion and see what we 'll come up with.

            Comment

              #7
              Re: Halting a running script

              try putting an XDialog box at some 'key' point (or several if necessary) of the
              script. Using XDialog will allow you to give the user choices like 'continue' or
              'OK' as well as 'Quit' or "Cancel'. If the user wants to continue, just click on
              the appropriate button -- same for quit. Of course, you will have to program the
              script to skip to the end of the script using the 'goto' command (if you want
              to stop). This will require a moderate knowledge of XBasic to accomplish,
              but it should not be that difficult.
              Keep in mind that doing this will require that 'someone' monitor the script during
              it's execution -- at least until the decision is made to continue to the end or
              quit.

              D

              Comment

                #8
                Re: Halting a running script

                I tried to do that but without success at this point.

                Once the loop is started i cant get out till the end of it, i guest I have yet to find the right place to put the dialog.

                I'll keep trying.

                Thanks for the pointer

                Comment

                  #9
                  Re: Halting a running script

                  Originally posted by gauvain65 View Post
                  I tried to do that but without success at this point.

                  Once the loop is started i cant get out till the end of it, i guest I have yet to find the right place to put the dialog.

                  I'll keep trying.

                  Thanks for the pointer
                  I have placed in the code archive a link to some sample code that allows periodic messages and canceling by a modeless dialog box that you could modify. Start in the code archive at Execute Code with Progress Messages and Cancel sample
                  Regards,

                  Ira J. Perlow
                  Computer Systems Design


                  CSDA A5 Products
                  New - Free CSDA DiagInfo - v1.39, 30 Apr 2013
                  CSDA Barcode Functions
                  CSDA Code Utility
                  CSDA Screen Capture

                  Comment

                    #10
                    Re: Halting a running script

                    Thank you,

                    I'll have a look at the samples and test some.

                    I'll keep you posted on the results.

                    Comment

                      #11
                      Re: Halting a running script

                      The samples you sent me worked like a charm !!!

                      I did a bit of tweaking in my code, now the user can:

                      1) Decide to Start or Abort the operation when the script is launched
                      2) Cancel the operation once the script has actually started to perform processing.

                      This is exactly what I wanted it to do.

                      Thank you very much for all the help !!!

                      Off we go to the next hurdle :)

                      Comment

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