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Multi-select button list values are in reverse order

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  • Multi-select button list values are in reverse order

    I have added a standard button list control to a UX.
    It has 18 buttons defined and each button returns the same value as its name, eg button 1 returns 1, button 2 returns 2 etc.
    The button list allows multiple selections.

    When I get the value of the button list it returns comma separated values but they are in reverse order, eg if buttons 1, 3, and 9 are selected the return value is 9,3,1

    This seems a bit strange and there doesn't appear to be a property to control this. Any ideas or help with javascript to reverse the order is appreciated.

  • #2
    Re: Multi-select button list values are in reverse order

    This is another head shaker. If you're using .getValue, then what you get is a weird array... with 1 value, items backward. Using .getValue your return is actually ["9,3,1"]. Why it's backwards... who knows. Why it's an array... but isn't an array you can easily use... who knows. It's essential an array with one value... a comma delimited list of the buttons you've selected. Buy why put it into an array... if it's not going to be an array of values?? Anyway...

    Instead of using .getValue()... use .getControl(). This will let you get a true array of values (that's the head shaking part). The array is there... it's just that Alpha doesn't give it to you with .getValue().

    Once you have the array (still backwards) you can reverse it. I would hope that Alpha is using Javascript .push() to add to the array... but .push() always adds to the end of the array... so ???

    Here's another mystery... no matter what order you select your buttons in, they will always only be easily available from highest to lowest order... and not of the button values you selected, but of the UI button order... which is really weird. E.g. if you select buttons 3,1,9... you will always get ["9,3,1"]... even if you use .getControl(). Alpha is doing a lot of work to give you this result... which doesn't seem to make any sense.

    You can do this to get the buttons in ascending order...

    Code:
    var btnListCtrl = {dialog.Object}.getControl('buttonListManyButtons');
    var blValues = btnListCtrl.value;
    blValues.reverse();

    If you want the values of the buttons you select to be in the order that you select them... there's more work to be done.

    Code:
    var btnOrder = [];
    var btnListCtrl = {dialog.Object}.getControl('buttonListManyButtons');
    var blSel = btnListCtrl.selection;
    var btns = btnListCtrl._btns;
    for(var i=0;i<blSel.length;i++){
    	btnOrder.push(btns[blSel[i]].value);
    }
    Set up an array
    Get the button list control
    Use the button list control property ".selection" to get the zero based values of the buttons selected... in their proper order
    Loop through the button list control buttons picking out the values based on the .selection property
    Push these values into an array

    Overall, the button list control seems a bit unpolished.

    Comment


    • #3
      Re: Multi-select button list values are in reverse order

      Thanks David,

      I borrowed from your examples and ended up doing this to reverse the returned value of the button list. In my case it didn't matter what order they were pressed in.

      var btnListCtrl = {dialog.Object}.getValue('MYBTNLIST');
      var blValues = btnListCtrl.toString();

      var blValuesReversed = reverseCommaSepString(blValues); //call function below

      function reverseCommaSepString(str) {
      return str.split(",").reverse().join(",");
      }

      Comment

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