Sum of sub answer
This solution will help your answer will total 100%.
First create a textgrid question, then add the below script to Javascript tab
//
// Private helper functions
//
function sumUp(question) {
// Sum up all except the last sub question, which is used for the s
var sum = 0;
question.subQuestions.slice(0, question.subQuestions.length - 1).each(function(sq) {
sum += parseInt(sq.attr('answer')) || 0;
});
return sum;
}
//
// Add an extra row to contain the sum
//
Question.bind('afterShowQuestion', function(ev, question, jqe) {
var sum = sumUp(question);
var sumElt = jqe.find('tr:last input').prop('disabled', true).val(sum);
});
//
// Listen for changes to the answer and update the sum
//
Question.bind('answerChanged', function(ev, question, subQuestion) {
// Ignore answer changes for the last sub question
if (subQuestion.gridNumber == question.subQuestions.length - 1) {
return;
}
question.subQuestions[question.subQuestions.length - 1].attr('answer', sumUp(question));
});
//
// Validate that the sum is exactly 100
//
Question.bind('afterValidateQuestion', function(ev, question, state) {
var sum = sumUp(question);
if (sum != 100) {
state.valid = false;
question.attr('errorMessage', 'Du bedes angive dine svar fra 0-100%, så dit svar tilsammen giver 100%');
}
});