A demo of the dotted or dashed background grid (limited browser support)

This uses the relatively recent addition to canvas from the canvas v5 specification - native dotted and dashed lines. In somewhat limited testing it worked in Chrome, Firefox and Internet Explorer 11.

obj.Set('background.grid.dashed', true);
obj.Set('background.grid.dotted', true);

Or using JSON style configuration:

...
backgroundGridDashed: true,
backgroundGridDotted: true,
...

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.gantt.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs1" width="600" height="250">[No canvas support]</canvas>
<canvas id="cvs2" width="600" height="250">[No canvas support]</canvas>

This is the code that generates the chart:

<script>
    window.onload = function ()
    {
        var gantt = new RGraph.Gantt({
            id: 'cvs1',
            data: [
                [0,5,50,'Richard'],
                [3,2,25,'John'],
                [3,2,10,'Freed']
            ],
            options: {
                labels: ['Monday','Tuesday','Wednesday','Thursday','Friday'],
                xmax: 5,
                title: 'A dashed background grid',
                titleY: 25,
                backgroundGridDashed: true,
                gutterRight: 45
            }
        }).draw();



        var bargantt2 = new RGraph.Gantt({
            id: 'cvs2',
            data: [
                [0,5,50,'Richard'],
                [3,2,25,'John'],
                [3,2,10,'Freed']
            ],
            options: {
                labels: ['Mal', 'Barry', 'Gary', 'Neil', 'Kim', 'Pete', 'Lou', 'Fred', 'Jobe'],
                xmax: 5,
                title: 'A dotted background grid',
                titleY: 25,
                backgroundGridDotted: true,
                gutterRight: 45
            }
        }).draw();
    };
</script>