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Proper Table Referencesin Set

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    #1

    Proper Table Referencesin Set

    I have a button on the second tab of a form that is used to edit invoices. The first tab displays an invoice parent. The second tab displays the invoice detail items in an embedded browse. When I highlight a row on the browse and press the button; The following script runs:

    ******************************************
    ''Edit invoices Script this opend a read only browse
    parentform.hide()
    this.disable()

    tbl = table.get("invoice_detail")

    vsoRec = tbl.recno()
    f2 = :Form.load("invdetpop","Dialog")
    f2:TABLES:invoice_detail.filter_expression = "between(recno(),"+str(vsoRec)+","+str(vsoRec)+")"
    f2:tables:invoice_detail.order_expression = ""
    f2:tables:invoice_detail.query()
    f2.resynch()
    f2.show()
    f2.close()
    vmode=""
    this.enable()
    parentform.resynch()
    parentform.show()
    :Invoice_Fm:Browse1.Refresh()
    END
    ************************************************

    The problem is that on a WIN95 machine I get that "MAximum Stack Depth exceeded" message after pressing the button and bringing the form up 3 times for editing. On an NT machine the message shows up after pressing the button 5 times. Any ideas?

    Tags: None
    #2
    RE: Proper Table Referencesin Set

    Dang, Pressed the button too soon.

    I was wondering if Each time I press the edit button that I am generating another instance of tbl and that may be what is causing the error.Should I close tbl? Maybe I could find another way to reference a value to shove into vsoRec.

    Note: "invoice_detail" is a member of the set that the main form is attached to.

    Comment

      #3
      RE: Proper Table Referencesin Set

      I vaguely recall having problems with dialog forms opened as you describe, although I can't remember the details just now.

      try this:
      have a global variable [RNUM] used for record number
      in the dialog form, go to properties and filter and put
      recno()=var->rnum
      assign a record number to your variable and just open the form as a dialog

      Comment

        #4
        RE: Proper Table Referencesin Set

        William,

        I have had the same problem and tried many approaches and ended with the same solution. The problem is that it takes too long to run the query. The result is that the form opens so slow that it is easy for the user to keep clicking, resulting in multiple queries trying to run and the stack error message.

        Setting a global variable and filtering the dialog form on the variable is by far the fastest and best solution. On one form I use, the time to open a dialog went from a few seconds to almost instantaneous.

        Jerry

        Comment

          #5
          RE: Proper Table Referencesin Set

          Greg,

          The potential problem of users pressing a button multiple times is a known problem both for fast acting scripts and slow ones. User frustration and the normal double click can both lead to unintended multiple button presses. This problem can be prevented by adding a line to defeat the second button press by deactivating the button. The line of code might be: This.Disable() from my lost notes.

          This allows the process to run until it completes where you place a second line of code to enable the button again, This.Enable(). The button may grey out while this code is running.

          Dave

          Comment

            #6
            RE: Proper Table Referencesin Set

            I am confused here, I use the :Form.load("invdetpop","Dialog") command to call up a dialog form, is there another way to call up a dialog form?

            Comment

              #7
              RE: Proper Table Referencesin Set

              don't say form.load("xx")
              say
              f=form.view("xx","dialog")
              and set the filter properties on the dialog form as described above.

              Comment

                #8
                RE: Proper Table Referencesin Set

                thank's Jerry - I couldn't remember the details - just that I had made a rule for how I opened them - whether as a dialog or regular.

                Comment

                  #9
                  RE: Proper Table Referencesin Set

                  Form.view doesn't give me any flexibility to adjust the appearance of objects in the form. Does this mean that I have to make separate almost identical forms?

                  Comment

                    #10
                    RE: Proper Table Referencesin Set

                    Greg

                    Attached is a sample showing how this works. You can certainly use form.load("formname","Dialog). I normally use this even if I am not trying to manipulate anything on the dialog form. In the sample, I dimmed the variable on the OnInit event for the inventory form. The dialog opens by doubleclicking a rom in the browse.

                    Jerry

                    Comment

                      #11
                      RE: Proper Table Referencesin Set

                      I am still confused. I can't understand the difference between your code and mine. You reference your recno from the form value in the OnInit event. and I get mine from a table reference within the OnPush event of a button. You get your popup using the onrowdoubleclick event of the browse and I do it with a button.

                      What is bothering me is that I can't get a fix on what is causing the error message problem in my code. I do a lot of cutting and pasting, this flaw can be all over the place.

                      Comment

                        #12
                        RE: Proper Table Referencesin Set

                        I declared the global variable in the OnInit event since it has to be declared somewhere and this was convenient for the example. I would normally declare (dim) all globals in an autoexec script. I set the value of the variable in the doubleclick event. Your method to set the variable value should also work. You could use the same script used on the doubleclick on a button.

                        I have a couple philosophys that usually keep me out of trouble. Keep it simple, if it works, use it, and don't fix what ain't broke. The method I posted works.

                        Jerry

                        Comment

                          #13
                          RE: Proper Table Referencesin Set

                          Greg,

                          Maybe this will help.

                          I took Jerry's example, and extended it to show you how I'd approach it using a query run in the called form, in the same manner you were doing.

                          Unzip the attachment to a separate folder. Do not mix it with your development work.

                          You'll find Jerry's example, and two new forms (both of which have names which end with the numeral '2'):

                          I've removed the global variable and the filter from both, and implemented your approach, with revisions I've learned
                          are usefule. Explanatory notes are at the end of the script.

                          Let me know if you have questions.

                          -- tom

                          Comment

                            #14
                            RE: Proper Table Referencesin Set

                            By the way, both Jerry and I run a month behind, which is why we've named our zip files with a reference to August, instead of September. Concerning September both he and I are in denial.

                            -- tom

                            Comment

                              #15
                              RE: Proper Table Referencesin Set

                              Thanks Tom, is the f2.activate() really needed? I have left this out of a lot of my scripts. Could you tell me why it is needed? I noticed that I have a resynch() in my script, could this be the culprit that is giving me the error?

                              Comment

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