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Gantt charts documentation

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• Example
• Properties
• Methods
• Adding events to your Gantt charts
• Adding vertical and horizontal bars to your Gantt chart
• Effects

Example

<script>
    // Create the Gantt chart. Note the (October 2012) change in how the events data is specified.
    // You now give the data as an argument to the constructor.
    var gantt = new RGraph.Gantt({
        id: 'cvs',
        data: [
            [31, 28, null, 'Richard', null, null, 'rgba(0,0,0,0)'],
            [31, 28, null, 'Fred', null, null, 'rgba(0,0,0,0)'],
            [59, 14, null, 'Barney', null, null, 'rgba(0,0,0,0)'],
            [59, 21, null, 'Gloria', null, null, 'rgba(0,0,0,0)'],
            [59, 31, null, 'Paul', null, null, 'rgba(0,0,0,0)'],
            [80, 21, null, 'Harry', null, null, 'rgba(0,0,0,0)'],
            [94, 7, null, 'Shane', null, null, 'rgba(0,0,0,0)'],
            [120, 14, null, 'Barry', null, null, 'rgba(0,0,0,0)'],
            [130, 14, null, 'Cynthia', null, null, 'rgba(0,0,0,0)'],
            [211, 61, null, 'Graham', null, null, 'rgba(0,0,0,0)'],
            [334, 31, null, 'Paul', null, null, 'rgba(0,0,0,0)']
        ],
        options: {
            xmax: 365,
            gutterleft: 75,
            labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
            title: 'Holiday schedule for Xyz Ltd',
            defaultcolor: 'rgba(255,0,0,1)',
            tooltips: [
                "<b>Richard</b><br />Richard is going on holiday.<br />He'll be away for 28 days.",
                "<b>Fred</b><br />Fred is also going away for 28 days",
                "<b>Barney</b><br />Barney is off work for two weeks",
                "<b>Gloria</b><br />Gloria is off for 3 weeks",
                "<b>Paul</b><br /> Away for 31 days",
                "<b>Harry</b><br />Away for three weeks",
                "<b>Shane</b><br />Away for one week",
                "<b>Barry</b><br />Away for two weeks",
                "<b>Cynthia</b><br />Away for two weeks",
                "<b>Graham</b><br />Away for August and September",
                "<b>Paul</b><br />Away for 31 days"
            ],
            vbars: [
                [0, 31, 'rgba(192,255,192,0.5)'],
                [59, 31, 'rgba(192,255,192,0.5)'],
                [120, 31, 'rgba(192,255,192,0.5)'],
                [181, 31, 'rgba(192,255,192,0.5)'],
                [243, 30, 'rgba(192,255,192,0.5)'],
                [304, 30, 'rgba(192,255,192,0.5)']
            ]
        }
    }).draw();
</script>

The example file is here.

Properties

You can use these properties to control how the chart apears. You can set them by including them in the options section of the configuration as above.

• Chart configuration
• Background
• Margins
• Labels and text
• Titles
• Interactive features
• Zoom
• Events
• Miscellaneous

Chart configuration

Background

Margins

Labels and text

<div style="margin-left: 50px; display: inline-block">
    <canvas id="cvs" width="650" height="250"></canvas>
</div>

Titles

Interactive features

Zoom

Events

miscellaneous

Methods

An accessor that you can use to retrieve the value of properties.

An accessor that you can use to set the value of properties.

This method returns the details of a focused bar (ie clicked or mouseover'ed. It returns:

• The chart object
• The X coordinate
• The Y coordinate
• The width of the bar
• The height of the bar
• The index of the bar (starting from 0)

The shape also includes textual indexes like this: shape['object'] And they are:

• object
• x
• y
• width
• height
• tooltip
• index

This method can be used to get an appropriate X coordinate for a value when you're doing custom drawing on the chart. It returns null if the value is out of range.

This method can be used to get the value when the chart has been clicked on. The argument is the event object. You can also use this method outside of an event listener by giving the function an array as the argument containing the X/Y coordinates.

obj.canvas.onclick = function (e)
{
    var obj   = e.target.__object__;
    var value = obj.getValue(e);
    
    // ...
}

This method can be used to set an event listener on an object. It operates in a similar way to the jQuery .on() function - the first argument is the event you wish to attach to and the second is the handler function. For example:

.on('draw', function (obj)
{
    // Put event code here
});

The exec function is documented here.

Adding events (the information represented on the chart) to your Gantt chart

To add events (the information represented on the chart), you now specify them as an argument to the constructor - NOT the events property.

myGantt = new RGraph.Gantt({
        id: 'cvs',
        data: [
            [31, 28, 75, 'Richard'],
            [12, 28, 67, 'Fred'],
            [59, 14, 0, 'Barney'],
            [59, 21, 5, 'Gloria'],
            [46, 31, 94, 'Paul'],
            [80, 21, 46, 'Harry'],
            [94, 17, 84, 'Shane'],
            [34, 14, 32, 'Barry'],
            [64, 14, 28, 'Cynthia', 'red', 'yellow'],
            [13, 61, 74, 'Graham'],
            [84, 31, 16, 'Paul']
        ],
        options: {
        }
    );

The first value is the (zero indexed) start number relative to your xmax. So if you have set your xmax to 62, (to represent two months), and this value is 31, the start will be the start of the second month. In this case you could give two labels - ['July', 'August'].

The second value is the duration. So using the previous example, if you set this to 7, you would have an event lasting a week.

The third value is the "percentage complete" indicator. This is shown to the right of the event, and is optional - you can specify null if you wish.

The fourth value is the label that is used on the left hand side.

The optional fifth value stipulates the background colour that the bar is. Default is white.

The optional sixth value is the foreground color of the bar. Defaulting to #0c0.

The optional seventh value is the border color, defaulting to black

And the optional eigth value is the numerical linewidth of the border. The default is 1.

Adding vertical and horizontal bars to your Gantt chart

You can add decorative vertical or horizontal bars like so:

...
vbars: [
    [0, 31, 'rgba(192,255,192,0.5)'],
    [59, 31, 'rgba(192,255,192,0.5)'],
    [120, 31, 'rgba(192,255,192,0.5)'],
    [181, 31, 'rgba(192,255,192,0.5)'],
    [243, 30, 'rgba(192,255,192,0.5)'],
    [304, 30, 'rgba(192,255,192,0.5)'],
],
hbars: [,'red',,,,'green'],
...

You can use these for decorative purposes, or to mark events/limits. For the vertical bars the first value is the start index, as above. The second value is the unit length, again as above. The third value is the color of the vertical bar.

And for the horizontal bars you just specify the color of the bar - they automatically extend across the entire gant chart area. If you don't specify a color (as above) then there won't be a bar for that entry.

Animation Effects

• Grow effect

<script>
    /**
    * Optional callback function that's called when the effect is complete
    */
    function myCallback (obj)
    {
        // ...
    }

    var obj = new RGraph.Gantt({
        id: 'cvs',
        data: [[0,30],[30,60],[60,90]],
        options: {
            gutterLeft: 35,
            max: 90
        }
    }).grow({frames: 60}, myCallback)
</script>