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Trouble With Conditional Formatting and Zero Values

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  • Trouble With Conditional Formatting and Zero Values

    I'm trying to use basic client-side conditional formatting on a numeric textbox, but it is not co-operating when the value is zero.

    My criteria is simple:
    1) Background RED when value is <-2 or >2 or <value> is ""
    2) Background BLUE when value is >=-2 and <=2

    The problem is when the value is 0, the background is set to Red and it should be Blue.
    No matter what I do, I can't seem to fix this. I've tried playing with allow blank values and setting the blank value as something like -9999 (thinking it was treating 0 as blank), but that won't work either.

    I've attached a very simple example. It only has one textbox on it. If 0 is entered, the box goes Red which is not what I want.

    If anyone is able to take a look, I could use the help.
    Attached Files
    Alpha Anywhere v12. Build 7582-5569 IIS v10.0 on Windows Server 2019 Std in Hyper-V

  • #2
    Re: Trouble With Conditional Formatting and Zero Values

    Conditional formatting is a bit tricky because I'm not sure how/when formatting is evaluated. When faced with a somewhat intricate set of choices I'll turn to a function instead... you have far more control.

    For example, using a function and passing in the field 'textbox1' we would see that textbox1 always has a value of 0... even though it shows as empty. So... even though we pass in the value, we're not going to use it. Instead, go after textbox1 inside the function and get it's true value.

    So... your conditions would now be...

    condText1(textbox1)=false (this is the red one)
    condText1(textbox1)=true (this is the blue one)
    and your Javascript function "condText1" is...

    function condText1(tb1){
    	var textbox1 = {dialog.Object}.getValue('textbox1');
    	if(textbox1 != ''){
    		textbox1 = Number(textbox1);
    	if(textbox1 < -2 || textbox1 > 2 || textbox1 === ''){
    			return false;
    		return true;
    Grab the value for textbox1. If it's not '' then convert it to a number.

    If the value falls out of range... or it's '' then return false. Notice we test for value and type regarding '' using ===.
    Else... return true.
    Last edited by Davidk; 04-25-2017, 09:25 PM.


    • #3
      Re: Trouble With Conditional Formatting and Zero Values

      Wow, that is very cool. Works perfectly!

      Thanks very much David, I learned something
      Last edited by iRadiate; 04-25-2017, 08:01 PM.
      Alpha Anywhere v12. Build 7582-5569 IIS v10.0 on Windows Server 2019 Std in Hyper-V


      • #4
        Re: Trouble With Conditional Formatting and Zero Values

        Well, I've run into a problem with this that I can't seem to avoid.

        If the user sets focus to the textbox and then tabs out of the textbox without entering a value, the code places a '0' in the textbox and it remains red (as though there were no value present).
        If the user actually puts a '0' into the textbox, the formatting is blue (which is correct ... any value between -2 and 2 should be blue).

        Because this is on a data entry form, I do not want a '0' showing in the textbox if the user just tabs through it.

        Are there any thoughts on how to work around this? Simple example is attached.
        Attached Files
        Alpha Anywhere v12. Build 7582-5569 IIS v10.0 on Windows Server 2019 Std in Hyper-V


        • #5
          Re: Trouble With Conditional Formatting and Zero Values

          So the problem here seems to be that I am applying client side formatting so that the number displays with 2 decimal places. When the user tabs out without entering a value, I get 0.00 in the box (BAD):

          2017-06-08_12-49-14.png -----> 2017-06-08_12-57-33.png

          But if I remove the client-side formatting and do it server-side then there is no value placed in the textbox when the user tabs out without entering a value (GOOD):

          2017-06-08_12-51-47.png -----> 2017-06-08_13-03-33.png

          If the user enters a value, there is no decimal place formatting (because it's server side now): -----> 2017-06-08_13-04-51.png

          I can live with this, though it would be nice is there were a way to force 2 decimal places
          Alpha Anywhere v12. Build 7582-5569 IIS v10.0 on Windows Server 2019 Std in Hyper-V


          • #6
            Re: Trouble With Conditional Formatting and Zero Values

            Then it's time to go it alone... and remove your Client-side formatting and the Conditional Style.
            Set the Style of the TextBox to have a background color of red... this is the default, empty setting.

            In the TextBox onChange event...

            And the Javascript function, condText, is...

            function condText(tbCtrl){
            	var tbEle = {dialog.Object}.getPointer(tbCtrl);
            	var tbVal = tbEle.value;
            	if(tbVal == ""){
     = 'red';
            	tbVal = Number(tbVal);
            	if(tbVal < -2 || tbVal > 2){
     = 'red';
            		tbVal = tbVal.toFixed(2);
            	if(tbVal >= -2 && tbVal <= 2){
     = '#99ccff';
            		tbVal = tbVal.toFixed(2);
            Here we get a pointer to the "TextBox" control passed in... and we get it's value.

            Then we first test for an empty string. If it's empty then we set the bgcolor to red and return.
            And so on.

            If you just tab in and out of a TextBox, onChange doesn't fire at all... so in your case, empty and red with stay that way.

            Now... if this is databound... and you want to show the proper color when rendered, then in Client-side onRenderComplete you'll need to call the condText function for each TextBox set up like this.
            Attached Files


            • #7
              Re: Trouble With Conditional Formatting and Zero Values

              *thanks for the example and code - I just hope I remember where to find this when I actually want to set colors in this way, especially when rendered!
              NWCOPRO: Nuisance Wildlife Control Software My Application: "Without forgetting, we would have no memory at what was I saying?"


              • #8
                Re: Trouble With Conditional Formatting and Zero Values

                David, once more I have to say thank you for sharing your code example, that works great! I was attempting a similar approach but getting nowhere with it so this is really helpful.
                This is a really useful piece of code for data entry applications.

                Yes, my textboxes are data-bound so I will be sure to call the function in the onRenderComplete when showing the completed forms.
                Alpha Anywhere v12. Build 7582-5569 IIS v10.0 on Windows Server 2019 Std in Hyper-V


                • #9
                  Re: Trouble With Conditional Formatting and Zero Values


                  Just a quick addition to this thread, I found that I had to call the condText functions when rendering the UX component from afterPopulateFromTable client-side event rather than onRenderComplete.
                  Otherwise the conditional formatting only gets applied the first time you select a record from the list, not on subsequent selections.
                  Alpha Anywhere v12. Build 7582-5569 IIS v10.0 on Windows Server 2019 Std in Hyper-V


                  • #10
                    Re: Trouble With Conditional Formatting and Zero Values

                    Nice... thanks.
                    Last edited by Davidk; 06-11-2017, 03:51 PM.


                    • #11
                      Re: Trouble With Conditional Formatting and Zero Values

                      I think the best way to handle this is to set up a Watch event on that control. Then you never have to worry about bound/unbound, data loading, navigating records... nothing. Whenever the value in that control changes, either from user input, or loading or navigation... the Watch event fires, and your control is formatted properly.