feat: new stackSubgroups option (#2519)

* Fix redraw order * Fix error when option is not defined * Allow template labels * Fix boolean types bug * Add subgroup stacking * Almost finish subgroup stacking * Play with examples for subgroup order * Fix stacked subgroups * Fix subgroup stacking * Add stackSubgroups option * Fix example * Add docs * Fix onRemove item subgroups recalculate * Return subgroup example and add stackSubgroup example * Split stackSubgroup example to subgroup/html and expectedVsActualTimesItems.html
7 years ago · 7f86cadcd1
--- a/docs/timeline/index.html
+++ b/docs/timeline/index.html
@ -1015,6 +1015,13 @@ function (option, path) {
      <td>If true (default), items will be stacked on top of each other such that they do not overlap.</td>
    </tr>

    <tr>
      <td>stackSubgroups</td>
      <td>boolean</td>
      <td><code>true</code></td>
      <td>If true (default), subgroups will be stacked on top of each other such that they do not overlap.</td>
    </tr>

    <tr>
      <td>snap</td>
      <td>function or null</td>
--- a/examples/timeline/groups/subgroups.html
+++ b/examples/timeline/groups/subgroups.html
@ -1,7 +1,10 @@
 <!DOCTYPE HTML>
 <html>
 <head>
    <title>Timeline | Background areas</title>
    <title>Timeline | Subgroups</title>

    <script src="../../../dist/vis.js"></script>
    <link href="../../../dist/vis.css" rel="stylesheet" type="text/css" />

    <style>
        body, html {
@ -19,14 +22,11 @@
            border-left: 2px solid green;
        }
    </style>

    <script src="../../../dist/vis.js"></script>
    <link href="../../../dist/vis-timeline-graph2d.min.css" rel="stylesheet" type="text/css" />
    <script src="../../googleAnalytics.js"></script>
 </head>
 <body>

 <p>This example shows the workings of the subgroups. Subgroups do not use stacking, and only work when stacking is disabled.</p>
 <button onclick="toggleStackSubgroups()">Toggle stackSubgroups</button>

 <div id="visualization"></div>

@ -66,11 +66,16 @@
        start: '2014-01-10',
        end: '2014-02-10',
        editable: true,
        stack: false
        stack: false,
        stackSubgroups: true
    };

    var timeline = new vis.Timeline(container, items, groups, options);

    function toggleStackSubgroups() {
        options.stackSubgroups = !options.stackSubgroups;
        timeline.setOptions(options);
    }
 </script>
 </body>
 </html>
--- a/examples/timeline/items/expectedVsActualTimesItems.html
+++ b/examples/timeline/items/expectedVsActualTimesItems.html
@ -0,0 +1,111 @@
 <!DOCTYPE HTML>
 <html>
 <head>
    <title>Timeline | expected vs actual times items</title>

    <script src="../../../dist/vis.js"></script>
    <link href="../../../dist/vis.css" rel="stylesheet" type="text/css" />

    <style>
        body, html {
            font-family: arial, sans-serif;
            font-size: 11pt;
        }
        .vis-item.expected {
            background-color: transparent;
            border-style: dashed!important;
            z-index: 0;
        }
        .vis-item.vis-selected {
            opacity: 0.6;
        }
        .vis-item.vis-background.marker {
            border-left: 2px solid green;
        }
    </style>
 </head>
 <body>

 <div id="visualization"></div>

 <script>

    // create a dataset with items
    // we specify the type of the fields `start` and `end` here to be strings
    // containing an ISO date. The fields will be outputted as ISO dates
    // automatically getting data from the DataSet via items.get().
    var items = new vis.DataSet({
        type: { start: 'ISODate', end: 'ISODate' }
    });

    var groups = new vis.DataSet([
        {
            id: 'group1', 
            content:'group1'
        }
    ]);

    // add items to the DataSet
    items.add([
        // group 1
        {
            id: 'background1',
            start: '2014-01-21', 
            end: '2014-01-22', 
            type: 'background', 
            group:'group1'
        },

        // subgroup 1
        {
            id: 1, 
            content: 'item 1 (expected time)', 
            className: 'expected',
            start: '2014-01-23 12:00:00', 
            end: '2014-01-26 12:00:00',
            group:'group1', 
            subgroup:'sg_1'
        },
        {
            id: 2, 
            content: 'item 1 (actual time)', 
            start: '2014-01-24 12:00:00', 
            end: '2014-01-27 12:00:00',
            group:'group1', 
            subgroup:'sg_1'
        },

        // subgroup 2
        {
            id: 3, 
            content: 'item 2 (expected time)', 
            className: 'expected',
            start: '2014-01-13 12:00:00', 
            end: '2014-01-16 12:00:00',
            group:'group1', 
            subgroup:'sg_2'
        },
         {
            id: 4, 
            content: 'item 2 (actual time)', 
            start: '2014-01-14 12:00:00', 
            end: '2014-01-17 12:00:00',
            group:'group1', 
            subgroup:'sg_2'
        }
    ]);

    var container = document.getElementById('visualization');
    var options = {
        start: '2014-01-10',
        end: '2014-02-10',
        editable: true,
        stack: false,
        stackSubgroups: false
    };

    var timeline = new vis.Timeline(container, items, groups, options);

 </script>
 </body>
 </html>
--- a/lib/timeline/Stack.js
+++ b/lib/timeline/Stack.js
@ -37,16 +37,15 @@ exports.orderByEnd = function(items) {
 *            items having a top===null will be re-stacked
 */
 exports.stack = function(items, margin, force) {
  var i, iMax;  
  if (force) {
    // reset top position of all items
    for (i = 0, iMax = items.length; i < iMax; i++) {
    for (var i = 0; i < items.length; i++) {
      items[i].top = null;
    }
  }

  // calculate new, non-overlapping positions
  for (i = 0, iMax = items.length; i < iMax; i++) {
  for (var i = 0; i < items.length; i++) {
    var item = items[i];
    if (item.stack && item.top === null) {
      // initialize top position
@ -80,29 +79,70 @@ exports.stack = function(items, margin, force) {
 *            All visible items
 * @param {{item: {horizontal: number, vertical: number}, axis: number}} margin
 *            Margins between items and between items and the axis.
 * @param {subgroups[]} subgroups
 *            All subgroups
 */
 exports.nostack = function(items, margin, subgroups) {
  var i, iMax, newTop;

  // reset top position of all items
  for (i = 0, iMax = items.length; i < iMax; i++) {
    if (items[i].data.subgroup !== undefined) {
      newTop = margin.axis;
 exports.nostack = function(items, margin, subgroups, stackSubgroups) {
  for (var i = 0; i < items.length; i++) {
    if (items[i].data.subgroup == undefined) {
      items[i].top = margin.item.vertical;
    } else if (items[i].data.subgroup !== undefined && stackSubgroups) {
      var newTop = 0;
      for (var subgroup in subgroups) {
        if (subgroups.hasOwnProperty(subgroup)) {
          if (subgroups[subgroup].visible == true && subgroups[subgroup].index < subgroups[items[i].data.subgroup].index) {
            newTop += subgroups[subgroup].height + margin.item.vertical;
            newTop += subgroups[subgroup].height;
            subgroups[items[i].data.subgroup].top = newTop;
          }
        }
      }
      items[i].top = newTop;
    }
    else {
      items[i].top = margin.axis;
      items[i].top = newTop + 0.5 * margin.item.vertical;
    }
  }
  if (!stackSubgroups) {
    exports.stackSubgroups(items, margin, subgroups)
  }
 };

 /**
 * Adjust vertical positions of the subgroups such that they don't overlap each
 * other.
 * @param {subgroups[]} subgroups
 *            All subgroups
 * @param {{item: {horizontal: number, vertical: number}, axis: number}} margin
 *            Margins between items and between items and the axis.
 */
 exports.stackSubgroups = function(items, margin, subgroups) {
  for (var subgroup in subgroups) {
    if (subgroups.hasOwnProperty(subgroup)) {


      subgroups[subgroup].top = 0;
      do {
        // TODO: optimize checking for overlap. when there is a gap without items,
        //       you only need to check for items from the next item on, not from zero
        var collidingItem = null;
        for (var otherSubgroup in subgroups) {
          if (subgroups[otherSubgroup].top !== null && otherSubgroup !== subgroup && subgroups[subgroup].index > subgroups[otherSubgroup].index && exports.collisionByTimes(subgroups[subgroup], subgroups[otherSubgroup])) {
            collidingItem = subgroups[otherSubgroup];
            break;
          }
        }

        if (collidingItem != null) {
          // There is a collision. Reposition the subgroups above the colliding element
          subgroups[subgroup].top = collidingItem.top + collidingItem.height;
        }
      } while (collidingItem);
    }
  }
  for (var i = 0; i < items.length; i++) {
    if (items[i].data.subgroup !== undefined) {
      items[i].top = subgroups[items[i].data.subgroup].top + 0.5 * margin.item.vertical;
    }
  }
 }

 /**
 * Test if the two provided items collide
 * The items must have parameters left, width, top, and height.
@ -127,3 +167,17 @@ exports.collision = function(a, b, margin, rtl) {
    (a.top + a.height + margin.vertical - EPSILON)   > b.top);
  }
 };

 /**
 * Test if the two provided objects collide
 * The objects must have parameters start, end, top, and height.
 * @param {Object} a          The first Object
 * @param {Object} b          The second Object
 * @return {boolean}        true if a and b collide, else false
 */
 exports.collisionByTimes = function(a, b) {
  return (
    (a.start < b.start && a.end > b.start && a.top < (b.top + b.height) && (a.top + a.height) > b.top ) ||
    (b.start < a.start && b.end > a.start && b.top < (a.top + a.height) && (b.top + b.height) > a.top )
  )
 }
--- a/lib/timeline/component/Group.js
+++ b/lib/timeline/component/Group.js
@ -88,7 +88,8 @@ Group.prototype._create = function() {
  // display:none is changed to visible.
  this.dom.marker = document.createElement('div');
  this.dom.marker.style.visibility = 'hidden';
  this.dom.marker.innerHTML = '?';
  this.dom.marker.style.position = 'absolute';
  this.dom.marker.innerHTML = '';
  this.dom.background.appendChild(this.dom.marker);
 };

@ -218,7 +219,7 @@ Group.prototype.redraw = function(range, margin, restack) {
  }

  // recalculate the height of the subgroups
  this._calculateSubGroupHeights();
  this._calculateSubGroupHeights(margin);

  // calculate actual size and position
  var foreground = this.dom.foreground;
@ -258,14 +259,17 @@ Group.prototype.redraw = function(range, margin, restack) {
    // no custom order function, lazy stacking

    this.visibleItems = this._updateItemsInRange(this.orderedItems, this.visibleItems, range);

    if (this.itemSet.options.stack) { // TODO: ugly way to access options...
      stack.stack(this.visibleItems, margin, restack);
    }
    else { // no stacking
      stack.nostack(this.visibleItems, margin, this.subgroups);
      stack.nostack(this.visibleItems, margin, this.subgroups, this.itemSet.options.stackSubgroups);
    }
  }
 	
  this._updateSubgroupsSizes();

  // recalculate the height of the group
  var height = this._calculateHeight(margin);

@ -304,7 +308,7 @@ Group.prototype.redraw = function(range, margin, restack) {
 * recalculate the height of the subgroups
 * @private
 */
 Group.prototype._calculateSubGroupHeights = function () {
 Group.prototype._calculateSubGroupHeights = function (margin) {
  if (Object.keys(this.subgroups).length > 0) {
    var me = this;

@ -312,7 +316,7 @@ Group.prototype._calculateSubGroupHeights = function () {

    util.forEach(this.visibleItems, function (item) {
      if (item.data.subgroup !== undefined) {
        me.subgroups[item.data.subgroup].height = Math.max(me.subgroups[item.data.subgroup].height, item.height);
        me.subgroups[item.data.subgroup].height = Math.max(me.subgroups[item.data.subgroup].height, item.height + margin.item.vertical);
        me.subgroups[item.data.subgroup].visible = true;
      }
    });
@ -422,9 +426,26 @@ Group.prototype.add = function(item) {
  // add to
  if (item.data.subgroup !== undefined) {
    if (this.subgroups[item.data.subgroup] === undefined) {
      this.subgroups[item.data.subgroup] = {height:0, visible: false, index:this.subgroupIndex, items: []};
      this.subgroups[item.data.subgroup] = {
        height:0, 
        top: 0,
        start: item.data.start,
        end: item.data.end,
        visible: false, 
        index:this.subgroupIndex, 
        items: []
      };
      this.subgroupIndex++;
    }


    if (new Date(item.data.start) < new Date(this.subgroups[item.data.subgroup].start)) { 
      this.subgroups[item.data.subgroup].start = item.data.start; 
    }
    if (new Date(item.data.end) > new Date(this.subgroups[item.data.subgroup].end)) { 
      this.subgroups[item.data.subgroup].end = item.data.end; 
    }

    this.subgroups[item.data.subgroup].items.push(item);
  }
  this.orderSubgroups();
@ -435,6 +456,29 @@ Group.prototype.add = function(item) {
  }
 };

 Group.prototype._updateSubgroupsSizes = function () {
  var me = this;
  if (me.subgroups) {
    for (var subgroup in me.subgroups) {
      var newStart = me.subgroups[subgroup].items[0].data.start;
      var newEnd = me.subgroups[subgroup].items[0].data.end;

      me.subgroups[subgroup].items.forEach(function(item) {
        if (new Date(item.data.start) < new Date(newStart)) { 
          newStart = item.data.start; 
        }
        if (new Date(item.data.end) > new Date(newEnd)) { 
          newEnd = item.data.end; 
        }
      })

      me.subgroups[subgroup].start = newStart;
      me.subgroups[subgroup].end = newEnd;

    }
  }
 }

 Group.prototype.orderSubgroups = function() {
  if (this.subgroupOrderer !== undefined) {
    var sortArray = [];
@ -489,6 +533,8 @@ Group.prototype.remove = function(item) {
      if (!subgroup.items.length){
        delete this.subgroups[item.data.subgroup];
        this.subgroupIndex--;
      } else {
        this._updateSubgroupsSizes();
      }
      this.orderSubgroups();
    }
--- a/lib/timeline/component/ItemSet.js
+++ b/lib/timeline/component/ItemSet.js
@ -34,6 +34,7 @@ function ItemSet(body, options) {
    },
    align: 'auto', // alignment of box items
    stack: true,
    stackSubgroups: true,
    groupOrderSwap: function(fromGroup, toGroup, groups) {
    	var targetOrder = toGroup.order;
    	toGroup.order = fromGroup.order;
@ -322,7 +323,7 @@ ItemSet.prototype.setOptions = function(options) {
  if (options) {
    // copy all options that we know
    var fields = [
      'type', 'rtl', 'align', 'order', 'stack', 'selectable', 'multiselect', 'itemsAlwaysDraggable', 
      'type', 'rtl', 'align', 'order', 'stack', 'stackSubgroups', 'selectable', 'multiselect', 'itemsAlwaysDraggable', 
      'multiselectPerGroup', 'groupOrder', 'dataAttributes', 'template', 'groupTemplate', 'visibleFrameTemplate',
      'hide', 'snap', 'groupOrderSwap', 'tooltipOnItemUpdateTime'
    ];
--- a/lib/timeline/component/item/BackgroundItem.js
+++ b/lib/timeline/component/item/BackgroundItem.js
@ -143,9 +143,6 @@ BackgroundItem.prototype.repositionX = RangeItem.prototype.repositionX;
 * @Override
 */
 BackgroundItem.prototype.repositionY = function(margin) {
  var onTop = this.options.orientation.item === 'top';
  this.dom.content.style.top = onTop ? '' : '0';
  this.dom.content.style.bottom = onTop ? '0' : '';
  var height;

  // special positioning for subgroups
@ -155,44 +152,16 @@ BackgroundItem.prototype.repositionY = function(margin) {
    var itemSubgroup = this.data.subgroup;
    var subgroups = this.parent.subgroups;
    var subgroupIndex = subgroups[itemSubgroup].index;
    // if the orientation is top, we need to take the difference in height into account.
    if (onTop == true) {
      // the first subgroup will have to account for the distance from the top to the first item.
      height = this.parent.subgroups[itemSubgroup].height + margin.item.vertical;
      height += subgroupIndex == 0 ? margin.axis - 0.5*margin.item.vertical : 0;
      var newTop = this.parent.top;
      for (var subgroup in subgroups) {
        if (subgroups.hasOwnProperty(subgroup)) {
          if (subgroups[subgroup].visible == true && subgroups[subgroup].index < subgroupIndex) {
            newTop += subgroups[subgroup].height + margin.item.vertical;
          }
        }
      }

      // the others will have to be offset downwards with this same distance.
      newTop += subgroupIndex != 0 ? margin.axis - 0.5 * margin.item.vertical : 0;
      this.dom.box.style.top = newTop + 'px';
      this.dom.box.style.bottom = '';
    }
    // and when the orientation is bottom:
    else {
      var newTop = this.parent.top;
      var totalHeight = 0;
      for (var subgroup in subgroups) {
        if (subgroups.hasOwnProperty(subgroup)) {
          if (subgroups[subgroup].visible == true) {
            var newHeight = subgroups[subgroup].height + margin.item.vertical;
            totalHeight += newHeight;
            if (subgroups[subgroup].index > subgroupIndex) {
              newTop += newHeight;
            }
          }
        }
      }
      height = this.parent.subgroups[itemSubgroup].height + margin.item.vertical;
      this.dom.box.style.top = (this.parent.height - totalHeight + newTop) + 'px';
      this.dom.box.style.bottom = '';

    this.dom.box.style.height = this.parent.subgroups[itemSubgroup].height + 'px';

    var orientation = this.options.orientation.item;
    if (orientation == 'top') { 
      this.dom.box.style.top = this.parent.top + this.parent.subgroups[itemSubgroup].top + 'px';
    } else {
      this.dom.box.style.top = (this.parent.top + this.parent.height - this.parent.subgroups[itemSubgroup].top - this.parent.subgroups[itemSubgroup].height) + 'px';
    }
    this.dom.box.style.bottom = '';
  }
  // and in the case of no subgroups:
  else {
@ -202,8 +171,8 @@ BackgroundItem.prototype.repositionY = function(margin) {
      height = Math.max(this.parent.height,
          this.parent.itemSet.body.domProps.center.height,
          this.parent.itemSet.body.domProps.centerContainer.height);
      this.dom.box.style.top = onTop ? '0' : '';
      this.dom.box.style.bottom = onTop ? '' : '0';
      this.dom.box.style.top = orientation == 'top' ? '0' : '';
      this.dom.box.style.bottom = orientation == 'top' ? '' : '0';
    }
    else {
      height = this.parent.height;
--- a/lib/timeline/optionsTimeline.js
+++ b/lib/timeline/optionsTimeline.js
@ -125,6 +125,7 @@ let allOptions = {
  showMajorLabels: { 'boolean': bool},
  showMinorLabels: { 'boolean': bool},
  stack: { 'boolean': bool},
  stackSubgroups: { 'boolean': bool},
  snap: {'function': 'function', 'null': 'null'},
  start: {date, number, string, moment},
  template: {'function': 'function'},
@ -221,6 +222,7 @@ let configureOptions = {
    showMajorLabels: true,
    showMinorLabels: true,
    stack: true,
    stackSubgroups: true,
    //snap: {'function': 'function', nada},
    start: '',
    //template: {'function': 'function'},