# RGraph: HTML5 canvas graph library - LED Grid documentation

The LED grid can be used to represent simple letters and numbers.

The example file is here.

    <script>
        window.onload = function ()
        {
            var led = new RGraph.LED('myCanvas', '456461');
            led.Set('chart.dark', '#666');
            led.Set('chart.light', 'rgba(255,255,255,1)');
            led.Draw();
        }
    </script>

## Available properties

You can use these properties to control how the LED grid apears.

- Chart configuration
- Interactive features
- Zoom

### Chart configuration

chart.dark
Color of the darkened (ie unlit) lights
Default: #eee
chart.light
Color of lit lights
Default: #f66
chart.background
The color of the background.
Default: white

### Interactive features

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

### 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