/**
* @desc "MaxDiff" matrix.
* */
class MaxDiffMatrix
{
constructor (cfg = {})
{
// surveyCSS contains css class names provided by the applied theme
// INCLUDING those added/modified by application's code.
const surveyCSS = cfg.question.css;
this._CSS_CLASSES = {
WRAPPER: `${surveyCSS.matrix.tableWrapper} matrix-maxdiff`,
TABLE: surveyCSS.matrix.root,
TABLE_ROW: surveyCSS.matrixdropdown.row,
TABLE_HEADER_CELL: surveyCSS.matrix.headerCell,
TABLE_CELL: surveyCSS.matrix.cell,
INPUT_TEXT: surveyCSS.text.root,
LABEL: surveyCSS.matrix.label,
ITEM_CHECKED: surveyCSS.matrix.itemChecked,
ITEM_VALUE: surveyCSS.matrix.itemValue,
ITEM_DECORATOR: surveyCSS.matrix.materialDecorator,
RADIO: surveyCSS.radiogroup.item,
SELECT: surveyCSS.dropdown.control,
CHECKBOX: surveyCSS.checkbox.item
};
// const CSS_CLASSES = {
// WRAPPER: "sv-matrix matrix-maxdiff",
// TABLE: "sv-table sv-matrix-root",
// TABLE_ROW: "sv-table__row",
// TABLE_HEADER_CELL: "sv-table__cell sv-table__cell--header",
// TABLE_CELL: "sv-table__cell sv-matrix__cell",
// INPUT_TEXT: "sv-text",
// RADIO: "sv-radio",
// SELECT: "sv-dropdown",
// CHECKBOX: "sv-checkbox"
// };
this._question = cfg.question;
this._DOM = cfg.el;
this._DOM.classList.add(...this._CSS_CLASSES.WRAPPER.split(" "));
this._bindedHandlers =
{
_handleInput: this._handleInput.bind(this)
};
this._init(this._question, this._DOM);
}
_handleInput (e)
{
const valueCoordinates = e.currentTarget.name.split("-");
const row = valueCoordinates[0];
const col = parseInt(e.currentTarget.dataset.column, 10);
const colRadioDOMS = this._DOM.querySelectorAll(`input[data-column="${col}"]`);
if (this._question.value === undefined)
{
this._question.value = {};
}
const oldVal = this._question.value;
const newVal = {[row]: col};
// Handle case when exclusiveAnswer option is false?
let inputRow;
let i;
for (i = 0; i < colRadioDOMS.length; i++)
{
if (colRadioDOMS[i] !== e.currentTarget)
{
colRadioDOMS[i].checked = false;
inputRow = colRadioDOMS[i].name;
// Preserving previously ticked columns within other rows
if (oldVal[inputRow] !== undefined && oldVal[inputRow] !== col)
{
newVal[inputRow] = oldVal[inputRow];
}
}
}
this._question.value = newVal;
console.log(row, col, this._question.value);
}
_init (question, el)
{
let t = performance.now();
const CSS_CLASSES = this._CSS_CLASSES;
if (question.css.matrix.mainRoot)
{
// Replacing default mainRoot class with those used in matrix type questions, to achieve proper styling and overflow behavior
const rootClass = `${question.css.matrix.mainRoot} ${question.cssClasses.withFrame || ""}`;
question.setCssRoot(rootClass);
question.cssClasses.mainRoot = rootClass;
}
// Relying on a fact that there's always 2 columns.
// This is correct according current Qualtrics design for MaxDiff matrices.
// Header generation
let headerCells =
`<th class="${CSS_CLASSES.TABLE_HEADER_CELL}">${question.columns[0].text}</th>
<td></td>
<td></td>
<td></td>
<th class="${CSS_CLASSES.TABLE_HEADER_CELL}">${question.columns[1].text}</th>`;
// Body generation
let bodyHTML = "";
for (let i = 0; i < question.rows.length; i++)
{
const bodyCells =
`<td class="${CSS_CLASSES.TABLE_CELL}">
<label class="${CSS_CLASSES.LABEL}">
<input type="radio" class="${CSS_CLASSES.ITEM_VALUE}" name="${question.rows[i].value}" data-column=${question.columns[0].value}>
<span class="${CSS_CLASSES.ITEM_DECORATOR}"></span>
</label>
</td>
<td></td>
<td class="${CSS_CLASSES.TABLE_CELL}">${question.rows[i].text}</td>
<td></td>
<td class="${CSS_CLASSES.TABLE_CELL}">
<label class="${CSS_CLASSES.LABEL}">
<input type="radio" class="${CSS_CLASSES.ITEM_VALUE}" name="${question.rows[i].value}" data-column=${question.columns[1].value}>
<span class="${CSS_CLASSES.ITEM_DECORATOR}"></span>
</label>
</td>`;
bodyHTML += `<tr class="${CSS_CLASSES.TABLE_ROW}">${bodyCells}</tr>`;
}
let html = `<table class="${CSS_CLASSES.TABLE}">
<thead>
<tr>${headerCells}</tr>
</thead>
<tbody>${bodyHTML}</tbody>
</table>`;
console.log("maxdiff matrix generation took", performance.now() - t);
el.insertAdjacentHTML("beforeend", html);
let inputDOMS = el.querySelectorAll("input");
for (let i = 0; i < inputDOMS.length; i++)
{
inputDOMS[i].addEventListener("input", this._bindedHandlers._handleInput);
}
}
}
export default function init (Survey)
{
var widget = {
//the widget name. It should be unique and written in lowcase.
name: "maxdiffmatrix",
//the widget title. It is how it will appear on the toolbox of the SurveyJS Editor/Builder
title: "MaxDiff matrix",
//the name of the icon on the toolbox. We will leave it empty to use the standard one
iconName: "",
//If the widgets depends on third-party library(s) then here you may check if this library(s) is loaded
widgetIsLoaded: function () {
//return typeof $ == "function" && !!$.fn.select2; //return true if jQuery and select2 widget are loaded on the page
return true; //we do not require anything so we just return true.
},
//SurveyJS library calls this function for every question to check, if it should use this widget instead of default rendering/behavior
isFit: function (question) {
//we return true if the type of question is maxdiffmatrix
return question.getType() === 'maxdiffmatrix';
//the following code will activate the widget for a text question with inputType equals to date
//return question.getType() === 'text' && question.inputType === "date";
},
//Use this function to create a new class or add new properties or remove unneeded properties from your widget
//activatedBy tells how your widget has been activated by: property, type or customType
//property - it means that it will activated if a property of the existing question type is set to particular value, for example inputType = "date"
//type - you are changing the behaviour of entire question type. For example render radiogroup question differently, have a fancy radio buttons
//customType - you are creating a new type, like in our example "maxdiffmatrix"
activatedByChanged: function (activatedBy) {
//we do not need to check acticatedBy parameter, since we will use our widget for customType only
//We are creating a new class and derived it from text question type. It means that text model (properties and fuctions) will be available to us
Survey.JsonObject.metaData.addClass("maxdiffmatrix", [], null, "text");
//signaturepad is derived from "empty" class - basic question class
//Survey.JsonObject.metaData.addClass("signaturepad", [], null, "empty");
//Add new property(s)
//For more information go to https://surveyjs.io/Examples/Builder/?id=addproperties#content-docs
Survey.JsonObject.metaData.addProperties("maxdiffmatrix", [
{
name: "rows",
isArray: true,
default: []
},
{
name: "columns",
isArray: true,
default: []
}
]);
},
//If you want to use the default question rendering then set this property to true. We do not need any default rendering, we will use our our htmlTemplate
isDefaultRender: false,
//You should use it if your set the isDefaultRender to false
htmlTemplate: "<div></div>",
//The main function, rendering and two-way binding
afterRender: function (question, el) {
console.log("MaxDiff mat", question.rows, question.columns);
new MaxDiffMatrix({ question, el });
// let containers = el.querySelectorAll(".srv-slider-container");
// let inputDOMS = el.querySelectorAll(".srv-slider");
// let sliderDisplayDOMS = el.querySelectorAll(".srv-slider-display");
// if (!(question.value instanceof Array))
// {
// question.value = new Array(inputDOMS.length);
// question.value.fill(0);
// }
// for (i = 0; i < inputDOMS.length; i++)
// {
// inputDOMS[i].min = question.minVal;
// inputDOMS[i].max = question.maxVal;
// inputDOMS[i].addEventListener("input", (e) => {
// let idx = parseInt(e.currentTarget.dataset.idx, 10);
// question.value[idx] = parseFloat(e.currentTarget.value);
// // using .value setter to trigger update properly.
// // otherwise on survey competion it returns array of nulls.
// question.value = question.value;
// onValueChangedCallback();
// });
// // Handle grid lines?
// }
// function positionSliderDisplay (v, min, max, displayDOM)
// {
// v = parseFloat(v);
// min = parseFloat(min);
// max = parseFloat(max);
// // Formula is (halfThumbWidth - v * (fullThumbWidth / 100)), taking into account that display has translate(-50%, 0).
// // Size of thumb is set in CSS.
// displayDOM.style.left = `calc(${(v - min) / (max - min) * 100}% + ${10 - v * 0.2}px)`
// }
// var onValueChangedCallback = function () {
// let i;
// let v;
// for (i = 0; i < question.choices.length; i++)
// {
// v = question.value[i] || 0;
// inputDOMS[i].value = v;
// sliderDisplayDOMS[i].innerText = v;
// positionSliderDisplay(v, question.minVal, question.maxVal, sliderDisplayDOMS[i]);
// }
// }
// var onReadOnlyChangedCallback = function() {
// let i;
// if (question.isReadOnly) {
// for (i = 0; i < question.choices.length; i++)
// {
// inputDOMS[i].setAttribute('disabled', 'disabled');
// }
// } else {
// for (i = 0; i < question.choices.length; i++)
// {
// inputDOMS[i].removeAttribute("disabled");
// }
// }
// };
// if question becomes readonly/enabled add/remove disabled attribute
// question.readOnlyChangedCallback = onReadOnlyChangedCallback;
// if the question value changed in the code, for example you have changed it in JavaScript
// question.valueChangedCallback = onValueChangedCallback;
// set initial value
// onValueChangedCallback();
// make elements disabled if needed
// onReadOnlyChangedCallback();
},
//Use it to destroy the widget. It is typically needed by jQuery widgets
willUnmount: function (question, el) {
//We do not need to clear anything in our simple example
//Here is the example to destroy the image picker
//var $el = $(el).find("select");
//$el.data('picker').destroy();
}
}
//Register our widget in singleton custom widget collection
Survey.CustomWidgetCollection.Instance.addCustomWidget(widget, "customtype");
}