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# RGraph: HTML5 canvas graph library - Funnel chart documentation

This is a funnel chart. It can be used to illustrate stages of a sales or order fulfillment process, and in doing so highlight any bottlenecks or steps where large amounts of customers are lost.

The example file is here.

    <script>
        window.onload = function ()
        {
            var funnel = new RGraph.Funnel('funnel1', [100,45,45,26,21,5]);
            funnel.Set('chart.text.boxed', false);
            funnel.Set('chart.title', 'Leads through to sales');
            funnel.Set('chart.labels', ['A', 'B', 'C', 'D', 'E', 'F']);
            funnel.Set('chart.shadow', true);
            funnel.Draw();
        }
    </script>

## Properties

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

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

- Margins
- Colors
- Labels and text
- Titles
- Shadow
- Interactive features
- Key
- Zoom

### Margins

chart.gutter
The gutter of the chart. This is the whitespace area around the chart.
Default: 25

### Colors

chart.colors
These are the colors used for each segment.
Default: ['red', 'green', 'gray', 'blue', 'black', 'white']

### Labels and text

chart.labels
An array of the labels to be used on the graph.
Default: An empty array
chart.text.font
The font used to render the text.
Default: Verdana
chart.text.color
The color of the labels.
Default: black
chart.text.size
The size (in points) of the labels.
Default: 10
chart.text.boxed
Whether the text is contained within a white bounding box. In some cases this can help readability.
Default: true
chart.text.halign
The horizontal alignment of the text. Can be center or left.
Default: left

### Titles

chart.title
The title of the graph, if any.
Default: null
chart.title.hpos
This allows you to completely override the horizontal positioning of the title. It should be a number between 0 and 1, and is multiplied with the whole width of the canvas and then used as the horizontal position.
Default: null
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.title.color
The color of the title.
Default: black

### Shadow

chart.shadow
Whether a drop shadow is applied to the Funnel chart. The funnel is the first to use the canvas shadow API, and as such they won't be supported on all browsers. Currently only Safari 4+ (possibly earlier versions too), Firefox 3.5+ and Chrome 2+ support canvas shadows.
Default: false
chart.shadow.color
The color of the drop shadow.
Default: #666
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

### Interactive features

chart.contextmenu
An array of context menu items. More information on context menus is here.
Default: [] (An empty array)
chart.tooltips
An array of tooltips for the Funnel chart segments.
Default: null
chart.tooltips.effect
The animated effect that tooltips use - fade or expand
Default: fade
chart.tooltips.css.class
This is the name of the CSS class the graph uses.
Default: RGraph_tooltip
chart.tooltips.override
If you wish to handle showing tooltips yourself, this should be a function object which does just that. There's more information on the tooltips documentation page
Default: null
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.resizable
Defaulting to false, this determines whether your graph will be resizable. Because of the numerous event handlers this has to install code on, This feature is unlikely to work with other dynamic features (the context menu is fine however).
Default: false

### Key

chart.key
An array of informational texts to be used as the key
Default: [] (An empty array)
chart.key.position
This determines where the key is drawn. It can be "graph" or "gutter".
Default: graph
chart.key.background
This is the colour used for the background of the key.
Default: #fff
chart.key.shadow
Whether a small drop shadow is applied to the key.
Default: false
chart.key.shadow.color
The color of the shadow.
Default: #666
chart.key.shadow.blur
The extent of the blurring effect used on the shadow.
Default: 3
chart.key.shadow.offsetx
The X offset of the shadow.
Default: 2
chart.key.shadow.offsety
The Y offset of the shadow.
Default: 2
chart.key.rounded
This controls whether the corners of the key (in graph mode) are curved. If the key is gutter mode, this has no effect.
Default: false

### Zoom

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
chart.zoom.background
Defaulting to true, this determines whether the zoom has a dark, semi-opaque background that covers the entire web page.
Default: true