RGraph: HTML5 canvas graph library - Pie chart documentation

The pie chart can be used, for example, to represent something that is akin to percentages. ie A set of data that should be taken as part of a whole.

The example file is here.

    window.onload = function ()
        var data = [564,155,499,611,322];
        var pie = new RGraph.Pie('myPie', data);
        pie.Set('chart.labels', ['Abc', 'Def', 'Ghi', 'Jkl', 'Mno']);
        pie.Set('chart.linewidth', 5);
        pie.Set('chart.stroke', '#fff');

Available properties

You can use these properties to control how the pie chart looks. You can set them by using the Set() method. Eg:

myPie.Set('name', 'value');

chart.gutter The gutter of the graph (for text labels).
Default: 25
chart.align Whether to left, center or right align the pie chart.
Default: center
chart.colors Colors to be used for the pie segments.
Default: ['rgb(255,0,0)', '#ddd', 'rgb(0,255,0)', 'rgb(0,0,255)', 'rgb(255,255,0)', 'rgb(0,255,255)', 'red', 'pink', 'black', 'white']
chart.strokestyle The color of the seperating lines. By setting this to your background color, and setting the linewidth to approx. 5, it will make the pie chart look "exploded".
Default: #999
chart.text.size The size of the text (in points).
Default: 10
chart.text.font The font used to render the text.
Default: Verdana
chart.text.color The color of the labels.
Default: black
chart.labels An array of labels to be used for the chart.
Default: [] (an empty array)
chart.labels.sticks Stipulates that small sticks for the labels are shown. The example page has an example of this.
Default: false
chart.title The title of the pie chart.
Default: none
chart.title.color The color of the title.
Default: black
chart.title.vpos This allows you to completely override the vertical positioning of the title. It should be a number between 0 and 1, and is multiplied with the gutter and then used as the vertical position. It can be useful if you need to have a large gutter.
Default: null
chart.shadow Whether a simple shadow effect is applied.
Default: false
chart.shadow.color The color of the shadow.
Default: rgba(0,0,0,0.5)
chart.shadow.blur The severity of the shadow blurring effect.
Default: 3
chart.shadow.offsetx The X offset of the shadow.
Default: 3
chart.shadow.offsety The Y offset of the shadow.
Default: 3
chart.linewidth By setting this to roughly 5, and setting the strokestyle to the same colour as your background colour,you will get a segment separation effect.
Default: 1
chart.tooltips An array of tooltips, starting from the middle right (ie east) axis, and going clockwise sequentially.
Default: [] (An empty array)
chart.tooltip.effect The animated effect used for showing tooltips. Can be either fade or expand.
Default: fade
chart.highlight.style Can be either 2d or 3d and determines which style of segment highlighting is used in conjunction with tooltips.
Default: 2d
chart.key An array of strings used as the key for the chart. This can be used in place of labels if you prefer.
Default: null (ie no key is drawn)
chart.key.background The background color of the key.
Default: white
chart.key.shadow Whether the key casts a drop shadow.
Default: false
chart.contextmenu An array of context menu items. More information on context menus is here.
Default: [] (An empty array)
chart.annotatable Whether annotations are enabled for the chart (ie you can draw on the chart interactively.
Default: false
chart.annotate.color If you do not allow the use of the palette, then this will be the only colour allowed for annotations.
Default: black
chart.zoom.mode Can be used to control whether the zoom is in thumbnail or canvas mode. Possible values are: thumbnail and canvas.
Default: canvas
chart.zoom.factor This is the factor that the graph will be zoomed by (bigger values means more zoom)
Default: 1.5
chart.zoom.fade.in Whether the zoomed canvas fades in or not. This also can be used to control the fade in for the zoom in thumbnail mode.
Default: true
chart.zoom.fade.out Whether the zoomed canvas fades out or not. This also can be used to control the fade in for the zoom in thumbnail mode.
Default: true
chart.zoom.hdir The horizontal direction of the zoom. Possible values are: left, center, right
Default: right
chart.zoom.vdir The vertical direction of the zoom. Possible values are: up, center, down
Default: down
chart.zoom.delay The delay (in milliseconds) between frames.
Default: 50
chart.zoom.frames The number of frames in the zoom animation.
Default: 10
chart.zoom.shadow Whether or not the zoomed canvas has a shadow or not.
Default: true
chart.zoom.thumbnail.width When the zoom is in thumbnail mode, this is the width (in pixels) of the thumbnail.
Default: 75
chart.zoom.thumbnail.height When the zoom is in thumbnail mode, this is the height (in pixels) of the thumbnail.
Default: 75