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Run-away code

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  • Run-away code

    I have a button the OnPush event for this button calls up a "home made Lookup" form containing a browse. The idea is that the user selects a "Sales_Order number" from the browse and the choice is assigned to a global variable (sales_search). The remaining code in the button is as follows:

    parentform.index_set("salesorder")
    parentform.find(sales_search)
    parentform.resynch()

    My problem is that ALL the code is run during the OnPush event. The effect is that on pushing the button the "lookup" form appears I can choose a record press the OK button to make the lookup disappear and unfortunately, the Sales_Order number fails to change.

    When I press the button again the Sales_Order number I had chosen previously appears. Is there a way to get the button code to stop just after I call up the "lookup form" and resume after I make my choice?

  • #2
    RE: Run-away code

    Greg,

    The best way is to open the browse form as a dialog. This has two effects. First, it will stop the script until the dialog is closed. Second, it will deactivate all menus and toolbars. So you need some way to "close" the browse form. The x in the upper right works. Check the xbasic manual on opening forms as dialogs. Here is an example.

    p_frm = :Form.load("SelectInventory","dialog")
    ml = (ui_info(2)-p_frm.width)/2
    p_frm.left = :A5.left+ml
    p_frm.top = :A5.top+110

    p_frm.activate()
    p_frm.show()


    The top and left lines is something I added to set the location of the dialog at the upper left corner of the opening form. One thing about dialogs. Not all events fire when a form is opened as a dialog. OnInit does, but Onactivate does not for example.

    Jerry

    Comment


    • #3
      RE: Run-away code

      Oops,

      I forgot one line. Since closing a dialog from the dialog form only hides the form, the dialog must be explicitly closed with xbasic. Add the following line at the end.

      p_frm.close()

      Jerry

      Comment


      • #4
        RE: Run-away code

        I tried to load the form as dialog and I also included the close() command. Curiously enough, when I press the button there is a quick flash probably the "lookup form" and then nothing. When I press the button again I get:

        Trapped error in action command (1)
        Command Inline Basic
        Error variable type mismatch

        I also noticed that under the Xbasic explorer that after this happens I end up with 3 session running when I should have 1. The "lookup" form is simply a form with a browse and 2 buttons. In the oninit a branching operation puts a value into a variable depending on the value of a text object previously set. Button1 is an OK button where the chosen value is shoved into a variable button 2 is a cancel button.

        After I close down Alpha5 I get:

        Trapped error in action command (1)
        Command Inline Basic
        error bad object handle

        When I reopen the program and change the code back to the following everything works fine again. except for the problems in the beginning. The program seems to ignor the dialog command

        DIM layout_ptr as P
        if is_object("pop_orders") then
        layout_ptr="pop_orders"
        else
        layout_ptr = :Form.load("pop_orders")
        end if
        layout_ptr.show()
        layout_ptr.activate()

        Comment


        • #5
          RE: Run-away code

          Greg,

          Using dialogs is one area where care is paramount. Any error can prevent the dialog from closing and the error may not be trapped anywhere. Every time the form opens, it stays open until the app is closed and reopened. Been there, done that, too many times to mention. The script I posted was a cut and paste from a working script.

          The error you are getting would indicate that there is a problem in you form you are opening with a variable definition in an action script. Try eliminating any reference to the variable and see if the error goes away.

          If not, how about zipping up the tables and related files without data and posting them.

          Jerry

          Comment


          • #6
            RE: Run-away code

            Thanks for the help, I am really sorry to have put you through having to write all that explanation down. I finally have the problem licked, it turns out that my 13 year old son dropped the form.load script in for all intents and purposes it did the job but we were unaware of all the stuff going on in the background. Anyway I decided to start from scratch with another button and used the handy dandy Xbasic Explorer. The form.view("formname","dialog") with the formname.close() worked like a charm!

            Thanks again!

            Comment


            • #7
              RE: Run-away code

              Greg,

              Glad you got it to work. Just for your information, I accidentally ran into the same opening problem you had where the form would blink and disappear. Here is what I found.

              The problem was in the form that was opening as a dialog. I added a command to the OnInit event and this created the problem. When I moved the same command to the OnFetch event (which also fires on a dialog), the form opened normally as a dialog. Interestingly, the form opened as a standalone just fine either way.

              Using form.view() as a dialog works great if you don't need to manipulate anything on the form opening, like fetching a specifc record, etc. I usually use form.load() as a dialog because it is more flexible.

              Jerry

              Comment


              • #8
                RE: Run-away code

                Funny thing should happen.....

                I've been doing something like Greg's and came to the same resolution - that is - opening as 'dialog'. I didn't want to do it that way because we apparently have NO control on WHERE that dialog box will appear on the screen. All of the 'UI' prompts pretty much center themselves on the screen but that 'dialog' form can end up anywhere.

                Is there NO way to do it without opening as a dialog - perhaps have the push set the name of the control as a variable and process an 'If' statement from that? I.E. [Peter Wayne's] var->lstbtn=name.this().

                Does anyone out there share this comsmetic dilemma? And... found a work-a-round?

                Ken

                Comment


                • #9
                  RE: Run-away code

                  DUH.....!

                  Jerry: I just re-read your comments and see that you've foud a way to control location of the 'dialog' method for forms.

                  Where can I find documentation on the parameters that you set in your sample. WOW!

                  Ken the 'DUH'....

                  Comment


                  • #10
                    RE: Run-away code

                    Ken,

                    Don't feel bad, I stumbled around for a while until I figured how to do that. First, check out the section on ui_info() in the xbasic manual. Next, search this board for ui_info(). There have been a number of discussions about it. As for using it with a dialog, I found that setting a pointer for a form loaded as a dialog allows you to manipulate the form using the pointer. You can change almost any object property using the pointer address. A little experimentation, and the dialog performed as I wanted it. Attached is a little form with a button that I can paste on any form to see exactly what it's size is and it's location. After developement I either hide the button or remove it.

                    Jerry

                    Comment


                    • #11
                      RE: Run-away code

                      Thanks Jerry

                      Such a quick response!

                      Thanks alot!

                      Ken

                      Comment

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