chengnan
/
s202226701001


			
				
					
						
						
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							<!DOCTYPE HTML>
<html>
<head>
  <title>Timeline | Select items</title>

  <style>
    body, html {
      font-family: arial, sans-serif;
      font-size: 11pt;
    }
  </style>

  <script src="../../../dist/vis.js"></script>
  <link href="../../../dist/vis-timeline-graph2d.min.css" rel="stylesheet" type="text/css" />
  
</head>
<body>
<h1>Set selection</h1>
<p style="max-width: 600px;">
  Enter one or multiple ids of items, then press select to select the items. This demo uses the function <code>Timeline.setSelection(ids)</code>. Optionally, the window can be moved to the selected items.
</p>

<p>
  Select item(s): <input type="text" id="selection" value="5, 6"><input type="button" id="select" value="Select"><br>
  <label><input type="checkbox" id="focus" checked> Focus on selection</label>
</p>
<div id="visualization"></div>

<br/>
<p>If the height of the timeline is limited some items may be vertically offscreen. This demo uses <code>Timeline.setSelection(ids, {focus: true})</code> and demonstrates that focusing on an item will 
cause the timeline to scroll vertically to the item that is being focused on. You can use the buttons below select a random item either above or below the currently selected item.
</p>
<button id="prevFocus">Select Item Above</button>
<button id="nextFocus">Select Item Below</button>
<br/>

<p>If focusing on multiple items only the first item will be scrolled to. Try entering several ids and hitting <em>select</em>.</p>
<p>
Select item(s): <input type="text" id="selectionVertical" value="g1_5, g2_3"><input type="button" id="selectVertical" value="Select"><br>
</p>

<div id="vertical-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' }
  });

  // add items to the DataSet
  items.add([
    {id: 1, content: 'item 1<br>start', start: '2014-01-23'},
    {id: 2, content: 'item 2', start: '2014-01-18'},
    {id: 3, content: 'item 3', start: '2014-01-21'},
    {id: 4, content: 'item 4', start: '2014-01-19', end: '2014-01-24'},
    {id: 5, content: 'item 5', start: '2014-01-28', type:'point'},
    {id: 6, content: 'item 6', start: '2014-01-26'}
  ]);

  var container = document.getElementById('visualization');
  var options = {
    editable: true
  };

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

  var selection = document.getElementById('selection');
  var select = document.getElementById('select');
  var focus = document.getElementById('focus');
  select.onclick = function () {
    var ids = selection.value.split(',').map(function (value) {
      return value.trim();
    });
    timeline.setSelection(ids, {focus: focus.checked});
  };

  function getRandomInt(min, max) {
    min = Math.ceil(min);
    max = Math.floor(max);
    return Math.floor(Math.random() * (max - min)) + min; //The maximum is exclusive and the minimum is inclusive
  };

  // Vertical scroll example
  var groups = [];
  var items = [];
  var groupItems = {};

  for (var g = 0; g < 10; g++) {
    groups.push({
      id: g,
      content: "Group " + g
    });

    groupItems[g] = [];

    for (var i = 0; i < 30; i++) {
      items.push({
        id: "g" + g + "_" + i,
        content: "g" + g + "_" + i,
        group: g,
        start: "2014-" + (g + 1) + "-" + getRandomInt(1, 20)
      });

      groupItems[g].push(items[items.length - 1]);
    }
  }

  var container2 = document.getElementById('vertical-visualization');
  var options = {
    editable: false,
    stack: true,
    height: 300,
    verticalScroll: true,
    groupOrder: 'id'
  };

  var timeline2 = new vis.Timeline(container2, items, groups, options);

  var groupIndex = 0;
  var itemIndex = 0;

  var moveToItem = function(direction) {
    itemIndex += direction;
    groupIndex += direction;

    if (groupIndex < 0) {
      groupIndex = groups.length - 1;
    } else if (groupIndex >= groups.length) {
      groupIndex = 0;
    }

    var items = groupItems[groupIndex];

    if (itemIndex < 0) {
      itemIndex = items.length - 1;
    } else if (itemIndex >= items.length) {
      itemIndex = 0;
    }

    var id = items[itemIndex].id;

    timeline2.setSelection(id, {focus: true});
  }

  var nextFocus = document.getElementById('nextFocus');
  var prevFocus = document.getElementById('prevFocus');
  var selectionVertical = document.getElementById('selectionVertical');
  var selectVertical = document.getElementById('selectVertical');

  selectVertical.onclick = function () {
    var ids = selectionVertical.value.split(',').map(function (value) {
      return value.trim();
    });
    timeline2.setSelection(ids, {focus: focus.checked});
  };

  nextFocus.onclick = function() {
    moveToItem(1);
  };

  prevFocus.onclick = function() {
    moveToItem(-1);
  };

  // Set the initial focus
  setTimeout(function() {
    moveToItem(0);
  }, 500);
</script>
</body>
</html>