PoolSelectionContentViewer/index.html at master · MicroContent/PoolSelectionContentViewer · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>PoolSelectionViewer</title>
    <script type="application/javascript">
        function init() {
            window.data = getData();
            setXapiObjectGetter(getXapiObject);
            registerOnSubmitListener(onSubmit);
        }
        function updateLayout() {
            propagateLayoutChanges();
        }
        function sendStatement(stmt) {
            sendXapiStatement(stmt);
        }
    </script>
    <style type ="text/css">
       #overlay {
         width: 100%;
         height: 100%;
         z-index: 100;
         display: block;
         position: absolute;
         top: 0;
         left: 0;
         background: rgba(0,0,0,0);
       }
       .item {
          border: 1px solid black;
          border-radius: 5px;
          display: inline-block;
          text-align: center;
          min-width: 2em;
          padding: 0.5em;
          margin: 10px;
          cursor: move;
       }
       .correct {
            background-color: rgba(0,255,0,0.6);
       }
       .false {
            background-color: rgba(255,0,0,0.6);
       }
       #description {
            margin-bottom: 10px;
       }
       .black {
           color: black;
       }

    </style>
</head>
<body>
    <div id="description"></div>
    <div id="pool" style="width: 90%; min-height: 4em; border: 1px dashed black; border-radius: 15px; margin: 5%;"></div>
    <div id="itemArea" style="width: 100%; min-height: 4em;"></div>
    <div id="overlay"></div>

    <!-- for testing only
    <h1>testingfunction</h1><div id="testingfunction"></div> -->


    <script type="application/javascript">
        function getXapiObject(){
            return {};
        }

        function initializeItems(){
          var shuffle = function (a) {
            var j, x, i;
            for (i = a.length - 1; i > 0; i--) {
              j = Math.floor(Math.random() * (i + 1));
              x = a[i];
              a[i] = a[j];
              a[j] = x;
            }
            return a;
          };
          document.getElementById("description").innerHTML = window.data.question;
          shuffle(window.data.items).forEach(function(item){
            var elem = document.createElement("div");
            elem.setAttribute("id", item.id);
            elem.innerHTML=item.text;
            elem.setAttribute("class", "item");
            itemArea.appendChild(elem);
            items.push(elem);
          });
          overlay.addEventListener("mousedown", onMouseDown);
          overlay.addEventListener("mouseup", onMouseUp);
          overlay.addEventListener("mousemove", onMouseMove);
          overlay.addEventListener("touchstart", onMouseDown);
          overlay.addEventListener("touchend", onMouseUp);
          overlay.addEventListener("touchmove", onMouseMove);
        }

        function onMouseUp(e){
          if(!isShowingSolution){
            var outerRect = getBoundingClientRect();
            if(e.changedTouches !== undefined && e.changedTouches.length > 0){
              var x = (e.changedTouches[0].clientX - outerRect.left);
              var y = (e.changedTouches[0].clientY - outerRect.top);
            } else {
              var x = (e.clientX - outerRect.left);
              var y = (e.clientY - outerRect.top);
            }
            isDragging = false;
            if(selectedItem !== undefined){
              selectedItem.style = "";
              var hitbox = pool.getBoundingClientRect();
                if(x < hitbox.right && x > hitbox.left
                    && y < hitbox.bottom && y > hitbox.top &&
                    placeHolderForSelected.parentNode === itemArea){
                  // into the pool
                  selectedItem.parentNode.removeChild(selectedItem);
                  pool.appendChild(selectedItem);
                  placeHolderForSelected.parentNode.removeChild(placeHolderForSelected);
                  updateLayout();
                } else if ((x < hitbox.right && x > hitbox.left
                     && y < hitbox.bottom && y > hitbox.top)
                     || placeHolderForSelected.parentNode === itemArea){
                  // stay where you are
                  placeHolderForSelected.parentNode.replaceChild(selectedItem, placeHolderForSelected);
                } else {
                  // out of the pool
                  selectedItem.parentNode.removeChild(selectedItem);
                  itemArea.appendChild(selectedItem);
                  placeHolderForSelected.parentNode.removeChild(placeHolderForSelected);
                  updateLayout();
              }
            }
            selectedItem = undefined;
          }
        }


        function onMouseDown(e){
          if(!isShowingSolution){
            var outerRect = getBoundingClientRect();
            if(e.targetTouches !== undefined && e.targetTouches.length > 0){
              var x = (e.targetTouches[0].clientX - outerRect.left);
              var y = (e.targetTouches[0].clientY - outerRect.top);
            } else {
              var x = (e.clientX - outerRect.left);
              var y = (e.clientY - outerRect.top);
            }
            if (isDragging){
              //fix for missed events (e.g. when mouse leaves frame)
              onMouseUp(e);
            }
            items.forEach(function(elem){
              var hitbox = elem.getBoundingClientRect();
              if(x < hitbox.right && x > hitbox.left
                  && y < hitbox.bottom && y > hitbox.top){
                    isDragging = true;
                    selectedItem = elem;
                    clickPositionOffset.x = x - hitbox.left;
                    clickPositionOffset.y = y - hitbox.top;
                  }
            });
            if(isDragging){
              placeHolderForSelected = document.createElement("div");
              placeHolderForSelected.setAttribute("class", "item");
              placeHolderForSelected.innerHTML = selectedItem.innerHTML;
              placeHolderForSelected.style = "visibility: hidden;";
              selectedItem.parentNode.replaceChild(placeHolderForSelected, selectedItem);
              document.appendChild(selectedItem);
              selectedItem.style = "position: absolute; top:" + (y - clickPositionOffset.y -10) + "px; left:" + (x - clickPositionOffset.x -10) + "px;";
            }
          }
        }

        function onMouseMove(e){
          if(isDragging && !isShowingSolution){
            var outerRect = getBoundingClientRect();
            if(e.targetTouches !== undefined && e.targetTouches.length > 0){
              var x = (e.targetTouches[0].clientX - outerRect.left);
              var y = (e.targetTouches[0].clientY - outerRect.top);
            } else {
              var x = (e.clientX - outerRect.left);
              var y = (e.clientY - outerRect.top);
            }
            selectedItem.style = "position: absolute; top:" + (y - clickPositionOffset.y - 10) + "px; left:" + (x - clickPositionOffset.x - 10) + "px;";
            e.preventDefault();
          }
        }


        function onSubmit(){
            if (!isShowingSolution) {
                isShowingSolution = true;
                for (var i = 0; i<pool.childNodes.length; i++){
                  var correct = window.data.items.filter(function(item){ return item.isCorrect && item.id == pool.childNodes[i].id }).length === 1;
                  pool.childNodes[i].classList.add(correct?"correct":"false");
                }
                for (var i = 0; i<itemArea.childNodes.length; i++){
                  var correct = window.data.items.filter(function(item){ return !item.isCorrect && item.id == itemArea.childNodes[i].id }).length === 1;
                  itemArea.childNodes[i].classList.add(correct?"correct":"false");
                }
            }
            else {
              isShowingSolution = false;
              for (var i = 0; i<pool.childNodes.length; i++){
                pool.childNodes[i].classList.remove("correct");
                pool.childNodes[i].classList.remove("false");
              };
              for (var i = 0; i<itemArea.childNodes.length; i++){
                itemArea.childNodes[i].classList.remove("correct");
                itemArea.childNodes[i].classList.remove("false");
              };
            }
        }

        function onInteraction(id){
        }

        function showHideContext(){
        }


        init();

        var isDragging = false;
        var showHint = false;
        var isShowingSolution = false;
        var overlay = document.getElementById("overlay");
        var itemArea = document.getElementById("itemArea");
        var pool = document.getElementById("pool");
        var items = [];
        var selectedItem = undefined;
        var placeHolderForSelected = undefined;
        var clickPositionOffset = {x: 0, y: 0};
        initializeItems();
    </script>
</body>

</html>