This module is rated as ready for general use. It has reached a mature state, is considered relatively stable and bug-free, and may be used wherever appropriate. It can be mentioned on help pages and other Wikipedia resources as an option for new users. To minimise server load and avoid disruptive output, improvements should be developed through sandbox testing rather than repeated trial-and-error editing.

Smooth pie chart module. Accessed via Template:Pie chart.

Draws charts in HTML with an accessible legend (optional). A list of all features is in the "TODO" section of the main `p.pie` function.

Most of the time you should use with a helper template that adds required CSS: {{Pie chart}}.

Note that you don't need to provide the second value as it's calculated (assuming they sum up to 100).

{{Pie chart| [ {"value":33.3},  {} ] |thumb=none}}

Here we add some custom labels. Also note that we add a meta option to add legend on the side.

{{Pie chart| [
 {"label": "women: $v", "value": 33.3},
 {"label": "men: $v"}
]
|thumb=none
|meta = {"legend":true}
}}

In cases where you don't have calculated percentages, you can use automatic scaling. Just provide both values in this case.

{{Pie chart| [
 {"label": "women: $v", "value": 750},
 {"label": "men: $v", "value": 250}
]
|thumb=none
|meta = {"legend":true}
}}

The module allows displaying multiple values, not just 2.

{{Pie chart| [
 {"label": "sweets: $v", "value": 5, "color":"darkred"},
 {"label": "sandwiches: $v", "value": 3, "color":"wheat"},
 {"label": "cookies: $v", "value": 2, "color":"goldenrod"},
 {"label": "drinks: $v", "value": 1, "color":"#ccf"}
]
|thumb=none
|meta={"autoscale":true, "legend":true}
}}

Note that in this case, it was necessary to provide the additional option "autoscale":true. This is necessary when the sum is less than 100.

The legend is added using the meta property legend as shown. However, you can also change the order using direction. Possible values include:

• row (default) – order is list, chart;
• row-reverse – reverse order, i.e., chart, list;
• column – column layout (vertical).
• column-reverse – column layout, reversed (chart on top).

{{Pie chart| [
 {"label": "cookies: $v", "value": 2, "color":"goldenrod"},
 {"label": "drinks: $v", "value": 1, "color":"#ccf"},
 {"label": "sweets: $v", "value": 5, "color":"darkred"},
 {"label": "sandwiches: $v", "value": 3, "color":"wheat"}
]
|thumb=none
|meta={"autoscale":true, "legend":true, "direction":"row-reverse"}
}}

Green frames added for clarity in examples. They are not normally added.

In case you want to use without the {{Pie chart}} template, you can use this main functions:

• {{#invoke:Piechart|pie|json_data|meta=json_options}}
• {{#invoke:Piechart|color|number}}

Note that direct calls to the pie function require adding CSS:

<templatestyles src="Pie chart/style.css"/>
{{#invoke:Piechart|pie| [ {"value":33.3},  {} ] }}

Example of json_data:

[
		{ "label": "pie: $v", "color": "wheat", "value": 40 },
		{ "label": "cheese pizza $v", "color": "#fc0", "value": 20 },
		{ "label": "mixed pizza: $v", "color": "#f60", "value": 20 },
		{ "label": "raw pizza $v", "color": "#f30" }
]

• Note that the last value is missing. The last value is optional as long as the values are intended to sum up to 100 (as in 100%).
• Notice $v label, this is a formatted number (see `function prepareLabel`).
• Colors are hex or names. Default palette is in shades of green.

Example of meta=json_options:

|meta = {"size":200, "autoscale":false, "legend":true}

All meta options are optional (see `function p.setupOptions`).

For feature requests and bugs write to me, the author of the piechart module: Maciej Nux.