I'm made a test-case (with minor changes) for reproducing the bug.
IMPORTANT: To reproduce, zoom-in about 3 times.
This is the whole modified code for reproducing the bug (diff with "jQuery.Gantt-master/index.html" if you like):
<!doctype html>
<html lang="en-au">
<head>
<title>jQuery.Gantt</title>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=Edge;chrome=1" >
<link rel="stylesheet" href="css/style.css" />
<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css" />
<link rel="stylesheet" href="http://taitems.github.com/UX-Lab/core/css/prettify.css" />
<style type="text/css">
body {
font-family: Helvetica, Arial, sans-serif;
font-size: 13px;
padding: 0 0 50px 0;
}
.contain {
width: 800px;
margin: 0 auto;
}
h1 {
margin: 40px 0 20px 0;
}
h2 {
font-size: 1.5em;
padding-bottom: 3px;
border-bottom: 1px solid #DDD;
margin-top: 50px;
margin-bottom: 25px;
}
table th:first-child {
width: 150px;
}
</style>
</head>
<body>
<div class="contain">
<h1>
jQuery.Gantt
<small>— Draw Gantt charts with the famous jQuery ease of development</small>
</h1>
<h2>Contributors</h2>
<ul>
<li>
<strong><a href="http://mbielanczuk.com/" target="_blank">Marek Bielaร
๏ฟฝczuk</a></strong> wrote the original jQuery.Gantt plugin that this version is based off of.
</li>
<li>
<strong><a href="http://taitbrown.com/" target="_blank">Tait Brown</a></strong> enforced stricter code guidelines by validating the code, updating it to support HTML5 and tweaking the design.
</li>
<li>
<strong><a href="mailto:[email protected]" target="_blank">Leo Pfeifenberger</a></strong> made <em>major</em> performance updates as well as adding requested features such as click events, state persisting via cookies and scrollToToday on load functionality.
</li>
</ul>
<h2>
Example
</h2>
<div class="gantt"></div>
<h2>
Gantt Configuration
</h2>
<pre class="prettyprint">
$(".selector").gantt({
source: "ajax/data.json",
scale: "weeks",
minScale: "weeks",
maxScale: "months",
onItemClick: function(data) {
alert("Item clicked - show some details");
},
onAddClick: function(dt, rowId) {
alert("Empty space clicked - add an item!");
},
onRender: function() {
console.log("chart rendered");
}
});
</pre>
<table class="table table-striped">
<thead>
<tr>
<th>
Parameter
</th>
<th>
Default
</th>
<th>
Accepts Type
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<code>source</code>
</td>
<td>
null
</td>
<td>
Array, String (url)
</td>
</tr>
<tr>
<td>
<code>itemsPerPage</code>
</td>
<td>
7
</td>
<td>
Number
</td>
</tr>
<tr>
<td>
<code>months</code>
</td>
<td>
["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]
</td>
<td>
Array
</td>
</tr>
<tr>
<td>
<code>dow</code>
</td>
<td>
["S", "M", "T", "W", "T", "F", "S"]
</td>
<td>
Array
</td>
</tr>
<tr>
<td>
<code>navigate</code>
</td>
<td>
"buttons"
</td>
<td>
String ("buttons","scroll")
</td>
</tr>
<tr>
<td>
<code>scale</code>
</td>
<td>
"days"
</td>
<td>
String
</td>
</tr>
<tr>
<td>
<code>maxScale</code>
</td>
<td>
"months"
</td>
<td>
String
</td>
</tr>
<tr>
<td>
<code>minScale</code>
</td>
<td>
"hours"
</td>
<td>
String
</td>
</tr>
<tr>
<td>
<code>waitText</code>
</td>
<td>
"Please Wait..."
</td>
<td>
String
</td>
</tr>
<tr>
<td>
<code>onItemClick: </code>
</td>
<td>
<code>function (data) { return; }</code></td>
<td>
a JS Function that gets called when clicking on a Gantt-Item. <br />The parameter passed to the function is the dataObj of the item</td>
</tr>
<tr>
<td>
<code>onAddClick</code></td>
<td>
<code>function (dt, rowId) { return; }</code></td>
<td>
a JS Function that gets called when clicking on a Gantt-Item. <br />The parameter passed to the function is the DateTime in ms for the clicked Cell, and the ID if the source object (row)</td>
</tr>
<tr>
<td>
<code>onRender</code></td>
<td>
<code>function () { return; }</code></td>
<td>
a JS Function called whenever the chart is (re)rendered</td>
</tr>
<tr>
<td>
<code>useCookie</code></td>
<td>
<code>false</code></td>
<td>
indicates if cookies should be used to track the chart's state (scale, scrollposition) between postpacks<br />
<code>jquery.cookie.js</code> needs to be referenced for this to work</td>
</tr>
<tr>
<td>
<code>scrollToToday</code></td>
<td>
<code>true</code></td>
<td>
Boolean</td>
</tr>
</tbody>
</table>
<h2>
Source Configuration
</h2>
<pre class="prettyprint">
source: [{
name: "Example",
desc: "Lorem ipsum dolor sit amet.",
values: [ ... ]
}]
</pre>
<table class="table table-striped">
<thead>
<tr>
<th>
Parameter
</th>
<th>
Default
</th>
<th>
Accepts Type
</th>
<th>
Meaning
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<code>name</code>
</td>
<td>
null
</td>
<td>
String
</td>
<td>
Bold value in the left-most column of the gantt row.
</td>
</tr>
<tr>
<td>
<code>desc</code>
</td>
<td>
null
</td>
<td>
String
</td>
<td>
Secondary value in the gantt row.
</td>
</tr>
<tr>
<td>
<code>values</code>
</td>
<td>
null
</td>
<td>
Array
</td>
<td>
Collection of date ranges for gantt items. See next table.
</td>
</tr>
</tbody>
</table>
<h2>
Value Configuration
</h2>
<pre class="prettyprint">
values: [{
to: "/Date(1328832000000)/",
from: "/Date(1333411200000)/",
desc: "Something",
label: "Example Value",
customClass: "ganttRed",
dataObj: foo.bar[i]
}]
</pre>
<table class="table table-striped">
<thead>
<tr>
<th>
Parameter
</th>
<th>
Accepts Type
</th>
<th>
Meaning
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<code>to</code>
</td>
<td>
String (Date)
</td>
<td>
-
</td>
</tr>
<tr>
<td>
<code>from</code>
</td>
<td>
String (Date)
</td>
<td>
-
</td>
</tr>
<tr>
<td>
<code>desc</code>
</td>
<td>
String
</td>
<td>
Text that appears on hover, I think?
</td>
</tr>
<tr>
<td>
<code>label</code>
</td>
<td>
String
</td>
<td>
Appears on the gantt item.
</td>
</tr>
<tr>
<td>
<code>customClass</code>
</td>
<td>
String
</td>
<td>
Custom class to be applied to the gantt item.
</td>
</tr>
<tr>
<td>
<code>dataObj</code>
</td>
<td>
All
</td>
<td>
A data object that is applied directly to the gantt item.
</td>
</tr>
</tbody>
</table>
</div>
</body>
<script src="http://code.jquery.com/jquery-1.7.2.js"></script>
<script src="js/jquery.fn.gantt.js"></script>
<script src="http://twitter.github.com/bootstrap/assets/js/bootstrap-tooltip.js"></script>
<script src="http://twitter.github.com/bootstrap/assets/js/bootstrap-popover.js"></script>
<script src="http://taitems.github.com/UX-Lab/core/js/prettify.js"></script>
<script>
$(function() {
"use strict";
$(".gantt").gantt({
source: [{
name: "Sprint 0",
desc: "Analysis",
values: [{
/* WAS:
from: "/Date(1320192000000)/",
to: "/Date(1322401600000)/",
*/
// BUG:
from: "/Date(1349881200000)/",
to: "/Date(1349967600000)/",
label: "Requirement Gathering",
customClass: "ganttRed"
}]
},{
name: " ",
desc: "Scoping",
values: [{
from: "/Date(1322611200000)/",
to: "/Date(1323302400000)/",
label: "Scoping",
customClass: "ganttRed"
}]
},{
name: "Sprint 1",
desc: "Development",
values: [{
from: "/Date(1323802400000)/",
to: "/Date(1325685200000)/",
label: "Development",
customClass: "ganttGreen"
}]
},{
name: " ",
desc: "Showcasing",
values: [{
from: "/Date(1325685200000)/",
to: "/Date(1325695200000)/",
label: "Showcasing",
customClass: "ganttBlue"
}]
},{
name: "Sprint 2",
desc: "Development",
values: [{
from: "/Date(1326785200000)/",
to: "/Date(1325785200000)/",
label: "Development",
customClass: "ganttGreen"
}]
},{
name: " ",
desc: "Showcasing",
values: [{
from: "/Date(1328785200000)/",
to: "/Date(1328905200000)/",
label: "Showcasing",
customClass: "ganttBlue"
}]
},{
name: "Release Stage",
desc: "Training",
values: [{
from: "/Date(1330011200000)/",
to: "/Date(1336611200000)/",
label: "Training",
customClass: "ganttOrange"
}]
},{
name: " ",
desc: "Deployment",
values: [{
from: "/Date(1336611200000)/",
to: "/Date(1338711200000)/",
label: "Deployment",
customClass: "ganttOrange"
}]
},{
name: " ",
desc: "Warranty Period",
values: [{
from: "/Date(1336611200000)/",
to: "/Date(1349711200000)/",
label: "Warranty Period",
customClass: "ganttOrange"
}]
}],
navigate: "scroll",
// WAS:
/*
scale: "weeks",
maxScale: "months",
minScale: "days",
*/
// BUG:
scale: "weeks",
maxScale: "months",
minScale: "hours",
itemsPerPage: 10,
onItemClick: function(data) {
alert("Item clicked - show some details");
},
onAddClick: function(dt, rowId) {
alert("Empty space clicked - add an item!");
},
onRender: function() {
if (window.console && typeof console.log === "function") {
console.log("chart rendered");
}
}
});
$(".gantt").popover({
selector: ".bar",
title: "I'm a popover",
content: "And I'm the content of said popover.",
trigger: "hover"
});
prettyPrint();
});
</script>
</html>