RGraph: HTML5 canvas graph library - Odometer documentation

The example file is here. 

<script>
    window.onload = function ()
    {
        // ID, MINIMUM, MAXIMUM, INDICATED VALUE
        var odo = new RGraph.Odometer('myOdo', 0, 100, 18);
        
        odo.Set('chart.green.max', 75);
        odo.Set('chart.red.min', 90);
        odo.Set('chart.label.space', 50);
        odo.Set('chart.needle.thickness', 2);
    
        odo.Draw();
    }
</script>

Note

As of 20th March 2010, how you specify the start and end values has changed. The chart.green.start, chart.green.end, chart.yellow.start, chart.yellow.end, chart.red.start and chart.red.end have all been replaced by chart.green.max and chart.red.min. Now the green area always starts at zero and goes to chart.green.max, and the red area starts at 90% of the maximum value and goes to the maximum value. The yellow area is between the two.

Available properties

You can use these properties to control how the bar graph apears. You can set these properties using the Set() method.

chart.gutter The width of the area outside the odometer.
Default: 25		 chart.green.max This is the point at which the green area ends.
Default: 75% of the maximum value
chart.red.min This is the point at which the red area starts. The yellow area is between the green and red areas.
Default: 90% of the maximum value		 chart.label.area The width of the area that labels are put in.
Default: 35
chart.needle.thickness How thick the needle is.
Default: 2		 chart.needle.style The style that is applied to the needle.
Default: #000
chart.needle.head This controls whether the arrow head on the end of the needle is displayed.
Default: true		 chart.title The title text.
Default: no title set
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.value The indicated value
Default: none - must be given - also an argument to the constructor		 chart.start The start value.
Default: none - must be given - also an argument to the constructor
chart.end The end value.
Default: none - must be given - also an argument to the constructor		 chart.shadow.inner Whether a drop shadow is applied to the inner circle of the Odometer
Default: false
chart.shadow.outer Whether a drop shadow is applied to the whole Odometer.
Default: false		 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.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
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