Make check box activate a calculation

Question

Hello I have a question about forms and calculations.  I have the following problem.  I have a grand total which is setup to sum my fees column.  It works fine.  My fees column is multi line.  I had it setup to calculate hours multiplied by hours worked and put it in my fees column.  I only want the calculation to be dependent on whether or not my check boxes are checked.  If they are not checked then I do not want the calculation to happen.  I can't get this to work for me.  Is it possible?  Thanks for any help fellas!

Answer 1

If that is your fill script, you first need to obtain the values of the field objects.
// obtain the value for the field objects:
var C1= this.getField('C1').value;
var HR= this.getField('HR').value;
var HR2 = this.getField('HR2').value;
Once you have established the values you can test and use them. The
'if (statement) {
// block of code
} else {
// block of code
does not return a value. The '(statement)? {true answer code} : {false answer};' variation is used to return a value. So your final code can be:
// obtain the value for the field objects:
var C1= this.getField('C1').value;
var HR= this.getField('HR').value;
var HR2 = this.getField('HR2').value;
// test the value of the check box
if (C1 == 'Yes')
event.value = HR * HR2;
else
event.value = 0;
or
// obtain the value for the field objects:
var C1= this.getField('C1').value;
var HR= this.getField('HR').value;
var HR2 = this.getField('HR2').value;
// set the value based on the value of the check box
event.value = C1 == 'Yes'? HR * HR2 : 0;
But if you set the export value to '1', then your script can be:
var C1= this.getField('C1').value;
var HR= this.getField('HR').value;
var HR2 = this.getField('HR2').value;
// compute value from HR, HR2, and logical value of C1 not being Not a Number
event.value = HR * HR2 * !(isNaN(C1));