if (!(MainTab.selected)) {
    Submit.visible = false;
    Cancel.visible = false;
} else {
   Submit.visible = true;
   Cancel.visible = true;
}

 Submit.visible = Cancel.visible = (MainTab.selected);

...

You can build forms/flows In that meet Section 508 and WCAG 2.0 accessibility standards. Accessible forms/flows can assist users with visual and motor impairments. When the Accessible property is enabled for a form/flow, the error, "You can't leave this empty <control name>"  displays, if users move ahead from a required field without filling it. The status property for the empty control becomes invalid and sets the error message. Normally, the status property can be used in a business rule. For example, let's say a form has a text control named 't', and a message control named "m". If you write a rule to update the message field (control named m) with the STATUS of the required/invalid control (control named t), as shown below, it will not work because the "You can't leave this empty" message for a required control is not treated as it's status.

if(!t.valid)
  {
    m.value = t.status;
  }

...

This method is useful when you have multiple ComboBoxes and making multiple calls to the same webservice impacts performance. This simple example gets product data from the Database Connector and stores it in a hidden textArea in the form. Then a second rule parses the data and sets the ComboBox options. Please see the chapter on on Reusing Dynamic Content for more details.

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This rule is not yet supported in the Visual Rules Builder and thus still requires some JavaScript. This rule will take values selected in one checkbox control and populates those as options in a second checkbox control. For example, a checkbox control (Services) displays all available services. The second checkbox (Selected Services) will display as options the values selected in Services. One scenario you might use this is to customize an employee scheduling form. In Step 1 of the flow the Coordinator picks the offered services from the full Program Service list. In Step 2 the Employee sees only the smaller list to select from.

var opts = [''];
 
for (var i = 0; i < ProgramService.value.length; i++ ){
  var v = ProgramService.value[i].replace(/_/g,"  ");
  opts[i] = ProgramService[i].value + "=" + v;
}
SelectedPS.options = opts; 
var event = form.load;

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Calculating a date based on a five day work week is a common business scenario used in time sheets and displaying deadlines. You can calculate 'x' number of working days from the current date, and set that date in a Date control on your form. Here is the business function/rule that will add 3 working days to the current date to give you the deadline date. Copy/paste the entire rule including the function in the Rule Editor. Substitute the name of your date control for <your date control>:

 function calcWorkingDays(fromDate, days) {
    var count = 0;
    while (count < days) {
        fromDate.setDate(fromDate.getDate() + 1);
      if (fromDate.getDay() !== 0 && fromDate.getDay() !== 6) {  // Skip weekends
            count++;
      }
    }
    return fromDate;
}
 
if (form.load && <your date control>.value.length === 0){
  var numWorkingDays = 3; 
  var today = frevvo.currentDate().split('-');
  var dlDate = calcWorkingDays(new Date(today[0], today[1]-1, today[2]), numWorkingDays);
  var m = dlDate.getMonth() + 1;
  var d = dlDate.getDate();
  var y = dlDate.getFullYear();
  <your date control>.value = m + '-' + d + '-' + y;
}

...

Imagine an airline reservation form where the number of traveler information sections displayed or the number of rows in a table is based on the number of airline tickets purchased. There is a field in the form for the number of tickets named count and a repeat with a section including controls to collect information about each traveler. You can leave the default values for the Min/Max properties of the Section in the Forms designer or set them to any values provided the min value < max value and the max value  > min value.

This is an example of a business rule that displays the number of sections based on the number of purchased airline tickets. Min/Max for the section are set to 1 and 20 in the forms designer.

var i;
if (TravelRepeat.itemAdded) {
    i = TravelRepeat.itemIndex;
    TravelNo[i].value = 1 + i;
} else {
    if (count.value > TravelNo.value.length){
        TravelRepeat.maxOccurs = count.value;
        TravelRepeat.minOccurs = count.value;
    } else {
        TravelRepeat.minOccurs = count.value;
        TravelRepeat.maxOccurs = count.value;
    }
    for (i=0; i<TravelNo.value.length;i++) {
        TravelNo[i].value = 1 + i;
    }
} 

...

1. The first part of your rule should retrieve the results set (this part of the rule is not shown here). In this example, the user enters a number in the Number of Travelers field in the form.
2. The itemAdded statement is needed to determine if you are adding more sections. The first time the rule runs, this statement will evaluate as false and run the else statement
3. Evaluate if the number of sections needed is greater than the number or existing sections. If true, set the maxoccurs first because the table needs to increase.
4. if the number of sections needed is less than the number of existing sections then set the minoccurs first.
5. The rule will loop through the existing sections and set the values in the TravelNo field. If there are still additional sections to be added after the rule has looped through the existing sections, the itemAdded lines will run.
6. This rule sets the Min/Max properties to he same values so the plus and minus icons are not visible. This prevents users from adding repeating items.

Entering "5" as the number of travelers, sets the minOccurs and maxOccurs to 5 and shows 5 information sections.

Repeat Item Initialization

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If you click on the Rule Code to see the JavaScript generated by the Rule Builder, you will notice:

• The individual rows inside the CustomerTable are referred to in the rule as CustomerTableItem.
• Notice the TableItem deletable property is set to false when a lowercase or capital Y is entered in the first column. This will remove the minus icon for that row of the table. The for loop cycles through the table rows until the Max# property is reached.
  
  

  var event = form.load;
for (let i = 0; i < ContactCustomer.value.length; i++) {
  if ((ContactCustomer[i].value === 'Y') || (ContactCustomer[i].value === 'y')) {
    CustomerTableItem[i].deletable = false;
  } else {
    CustomerTableItem[i].deletable = true;
  }
}

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A rule can dynamically display an image uploaded to your form via the upload control. In this example the upload control is named 'u'. The form also must contain a message control as a place holder for displaying the uploaded image. The rule dynamically creates a URL to the uploaded image in the temporary attachment repository. The upload control's value 'u.value' is a GUID that uniquely identifies the attachment. The uploaded image will be included in the submission PDF.

if (u.value.length > 0) {
  var baseUrl = "/frevvo/web/tn/" +
      _data.getParameter('tn.id') +
      "/user/"+_data.getParameter('user.id') +
      "/app/"+_data.getParameter('app.id') +
      "/form/"+_data.getParameter('form.id');
 
  im.value = '<img src="' +
         baseUrl + '/attachment/' + u.value+'/does_not_matter"/>';
}

...