Show the navigation menu
RGraph: HTML5 charts library

The drawing API circle object

[No canvas support]

The circle object allows you to add a circle to your charts. You could use this as a "button" to provide extra information (with the circle tooltip) or simply to highlight a point. The circle object is very similar in function to the rect object.


Usage example

<script>
    $(document).ready(function ()
    {
        var line = new RGraph.Line({
            id: 'cvs',
            data: [4,9,1,3,2,6,5],
            options: {
                labels: ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday'],
                hmargin: 5,
                tickmarks: 'endcircle',
                colors: ['black']
            }
        }).draw()
        
        var x      = line.coords[2][0]
        var y      = line.coords[2][1]
        var radius = 15;

        var circle = new RGraph.Drawing.Circle({
            id: 'cvs',
            x: x,
            y: y,
            radius: radius,
            options: {
                strokestyle: 'black',
                fillstyle: 'rgba(255,0,0,0.7)',
                tooltips: ['<b>Example</b><br />This is an example tooltip'],
                shadow: {
                    self: true,
                    offsetx: 0,
                    offsety: 0,
                    blur: 5
                },
                events: {
                    click: function (e, shape) {alert('In the click listener!');},
                    mousemove: function (e, shape) {e.target.style.cursor = 'pointer';}
                }
            }
        }).draw()
    })
</script>

Properties

 

Colors

strokestyle
The color used to stroke the circle.
Default: transparent

fillstyle
The color used to fill the circle.
Default: red

 

Shadow

shadow
This controls whether the shadow is enabled or not.
Default: false

shadow.color
The color of the shadow.
Default: gray

shadow.offsetx
The X offset that the shadow is drawn at.
Default: 3

shadow.offsety
The Y offset that the shadow is drawn at.
Default: 3

 

Interactive features

tooltips
The tooltip for the circle. Even though you can only have one - this should still be an array: mycircle.set('tooltips', ['The tooltip']);
Default: null

tooltips.event
This can be onclick or onmousemove and controls what event is used to trigger the tooltip.
Default: onclick

tooltips.highlight
This stipulates whether the circle will be highlighted when the tooltip is shown.
Default: true

 

Events

events.click
If you want to add your own onclick function you can do so by assigning it to this property. See here for details.
Default: null

events.mousemove
If you want to add your own onmousemove function you can do so by assigning it to this property. See here for details.
Default: null

 

Miscellaneous

highlight.stroke
This is the color that the circle is highlighted (the stroke) in when the tooltip is shown.
Default: black

highlight.fill
This is the color that the circle is highlighted in (the fill) when the tooltip is shown.
Default: rgba(255,255,255,0.7)

linewidth
This is the linewidth that is used when stroking the circle.
Default: 2